403 results about "Tunnel safety" patented technology

The invention belongs to the field of construction safety monitoring and wireless communication and discloses a construction tunnel safety protection method based on a wireless sensor network and a monitoring system thereof. The method is as follows: by acquiring environment, work amount and locating data of personnel in a tunnel, realizing alarming services of six types of dangerous situations and corresponding safety protection means, calling a protection plan to take protection measures on key parts of the system when emergent (dangerous) events occur, and with the purpose of guaranteeing personal safety, releasing a control command. The system comprises a wireless sensor network based on industrial wireless communication standard WIA-PA, a positioning network and a mobile network. If the dangerous situation develops further, the system exchanges data with a remote mobile server by a 3G network, leads a community security system into the range of a construction tunnel safety protection system, and provides united rescue of communities and disaster control services. The invention is used for tunnel construction safety monitoring, and a computer or 3G mobile equipment can obtain construction site information at any time; and the installation of the WIA-PA wireless network is flexible, and the formed safety protection system and sensing early-warning network make contribution to solving the problem of tunnel safety construction fundamentally.

The monitoring equipment includes microprocessor, video sensor in use for monitoring site of tunnel, and communication module for communication outside. Microproceesor includes following modules: reading module for image dada in use for reading information of video image transferred from video sensor; file storage module in use for storing data collected by video sensor to storage device; real time playing module on site connected to external display device is in use for playing monitored image on site in real time. Output of the video sensor is connected to microprocessor through communication. Using all directional computer vision sensor monitors tunnel site, processes and analyzes images. Using detected variation character for fire flame in early phase, the invention finds early fire in tunnel as well as obtains traffic data including vehicle flowrate, and occupancy ratio, speed, and traffic accident etc.

The invention discloses a method for controlling distortion for deep large diameter shield tunnels to under-pass small diameter tunnels, which pertains to the technical field of tunnel engineering. According to the method, the control range of the stratum loss ratio of newly established tunnels and the optimum value of the support pressure of the shield cut surface are acquired by using the finite-element method; soil pressure in front of the shield cut surface is kept relatively balanced by setting the optimal value of the support pressure, and the support pressure fluctuation range of the cut surface is controlled to range from minus 10kPa to plus 10kPa; the stratum loss ratio of the newly established tunnels is controlled within the allowed range. According to the construction technique measures, a test propelling area is arranged before the shield reaches a cross position. In the area, construction is carried out according to the situation of the existing underground tunnels above; and construction parameters are controlled and regulated to adjust the support pressure, the propulsive velocity and the amount of the grout to be injected in time; the shield passes through the cross position in combination with the optimal values of the construction parameters of the test propelling area. The invention can not only ensure the construction of tunnels to be carried out safely and smoothly, but also minimize the influence of construction on ambient environment.

A tunnel disease full-section dynamic rapid detection device based on active panoramic vision comprises a tunnel detection vehicle, an active panoramic vision sensor, an RFID (radio frequency identification) reader, a wireless receiving-transmitting unit, a controller, and a station-level communication system or a central monitor center server; the central monitor center server comprises a full-directional vision sensor calibrating module, an active panoramic vision sensor calibrating database, a Zi-th distance tunnel section panoramic image data reading unit, a full tunnel section panoramic image base, a full-directional plane laser information analysis and point cloud data acquisition unit, a tunnel section panoramic image expansion and splitting unit, a tunnel suspected disease image pretreatment unit, a tunnel suspected disease image treatment unit, a tunnel disease image characteristic index extracting unit, and a tunnel safety status estimating unit. The invention provides a novel tunnel full-section high-speed dynamic health examination method, automatically detecting, judging and estimating various defects present in a tunnel to provide effective technical support for tunnel maintenance and completion acceptance inspection.

The invention discloses a method for intelligently designing the bolting of coal mine tunnels, which belongs to the method for designing the bolting of the coal mine tunnels. The design method comprises the following steps of: collecting the basic condition data of the tunnels, testing the physical and mechanical properties and ground stress level of surrounding rocks of the tunnels and establishing a bolting designing basic database; performing geomechanical estimation on the surrounding rocks by utilizing an intelligent expert system to obtain parameters required by the bolting design; establishing a bolting scheme and a parameter reasoning, computing and optimizing model by utilizing the intelligent expert system, and determining an initial design scheme; performing field construction and monitoring and feeding monitoring information back to the intelligent expert system; and judging the rationality of the initial design scheme by utilizing the intelligent expert system, performing necessary correction, and cyclically performing field construction, monitoring and verification on the corrected design until final design is formed. In the method, the problems of coal mine bolting material waste, poor tunnel safety and the like are solved, and orientation to the field engineering technical personnel can be achieved; and the method is widely practicable.

The invention discloses a tunnel back reflection illuminating system setting method based on train speed control and train distance keeping. The method comprises the steps of: arranging tunnel side walls, red and white facade marked lines on lower edges of curbs, and road surface raised pavement markers on road sides to form a space high-frequency vision information stream; secondly, arranging a plurality of layers of outline markers on the tunnel side walls at intervals of 25-50m in an advancing direction, arranging side wall vertical marked lines and extending to the top of a cave, transversely arranging transverse wrong vision marked lines on the road surface to form a space medium-frequency vision information stream; and then arranging two white folded lines and vibration marked lines on the road surface every 3 medium-frequency transverse marked lines at intervals of 100-200m in the advancing direction, and arranging two white folded lines on the side walls to form a space low-frequency vision information stream. Multiple channels of frequency vision systems are made of a high-strength back reflection material, so that a back reflection illuminating system is formed, perception of velocity and perception of distance of a driver are effectively improved, thus the integration of tunnel illuminating benefit and tunnel safety is achieved. The tunnel back reflection illuminating system setting method can be applied to tunnel illumination of low-light expressways with speed limit of 60-80km / h and traffic safety facility improvement.

The invention discloses a structure health monitoring and safety prewarning system for a shield tunnel. The structure health monitoring and safety prewarning system comprises a data acquisition subsystem, a long-distance transmission network, a central data base subsystem, a safety assessment subsystem and a user interface subsystem. The data acquisition subsystem comprises multiple types of sensors and various acquisition units corresponding to the sensors; the sensors are used for acquiring monitoring information of the structure of the shield tunnel, and transmitting processed monitoring information to the central data base subsystem through the long-distance transmission network; and the safety assessment subsystem assesses the structure state of the shield tunnel according to acquired monitoring data, and displays various data to users through the user interface subsystem. The structure health monitoring and safety prewarning system is disclosed for the long-term structure safety requirement of the shield tunnel; the use stability and durability are ensured; long-time real-time automatic acquisition of structure health performance data of the tunnel shield can be realized; and the safety use state of the shield tunnel can be determined, and automatic safety warning can be realized.

The invention provides a water conveyance tunnel with a prestressed composite lining for shield tunnelling. The tunnel comprises an ordinary reinforced concrete outer lining (1) which is formed by shield construction and is an assembled segment ring, wherein segments on the same ring are connected by connecting bolts (2); dowel bars (3) are installed in hand holes on the assembled segment ring; concrete is directly poured on the outer lining (1) to form an inner lining (5); shear keys (6) are formed in such a manner that concrete is filled in the hand holes of the outer lining; and the inner lining (5) and the outer lining (1) are combined via the dowel bars (3) and the concrete shear keys (6) to form a composite lining structure. Thus, the defects of great construction difficulty, long construction period and higher investment caused by the separated pressure pipeline water conveyance scheme for shield tunnelling are overcome. The technical problems of high head, high flow, high load and possibility of endangering the tunnel safety due to seepage of underground water, which are encountered when the soft soil layer of the riverbed is tunnelled in the shield tunnelling construction of the Yellow River crossing tunnel, are solved. Besides, the invention reduces the project investment and has obvious social benefits.

The present invention disclose a steel plate-concrete composite lining which combines support and water proof and belongs to tunnel safe support device range. It can be applied for construction of new tunnel with high force bearing and water proof requirement and the reinforcement of existing structures, and includes a circular cross section tunnel, an arched section tunnel or various section shape tunnels or saps. The lining is generally formed in a way of first forming a lining frame by two anti-cut connection elements melted with studs, a reinforcing steel net banded by reinforcing steels and a steel plate and then spraying concrete into the frame. The invention combines the steel plate, the sprayed concrete to a whole structure to bear force, has improved bearing ability and stability than single reinforcing steel concrete lining, can be as support for new tunnel and as the reinforcement device for similar structure. The invention has the advantages of easy in quality guaranty, simple and quick in construction and high in synthetic effect.

The present invention relates to a method and a system for security hypertext transmission protocol communication tunnel security checking and content filtering, which are used to check the security hypertext transmission protocol connection between a client side and a sever side. The method comprises the steps that, step one, a security hypertext transmission protocol proxy server forwards the digital certificate in security hypertext transmission protocol connection data to a digital certificate analysis device; step two, the digital certificate analysis device compares the digital certificate in the security hypertext transmission protocol connection data with the digital certificate stored, if the digital certificate transmitted by the security hypertext transmission protocol proxy server belongs to a digital certificate white list tabulation, step three is performed; step three, the security hypertext transmission protocol proxy server leads the client side and the sever side to be connected directly.

The invention discloses a method for mounting and applying a road, bridge and tunnel safety comprehensive detection, monitoring and early warning device. The device comprises components as follows: control processors, a central processor, warning devices, side slope and heading slope displacement detection sensor, a bridge entrance superelevation and overweight detection sensor, a bridge structure displacement and gravity detection sensor, a bridge anti-collision detection sensor, a tunnel lining transformation detection sensor, a wind power detection sensor, a rain, snow, fog visibility, humidity and temperature detection sensor, road, bridge and tunnel virtual model or entity model, a memory and the like. The device can achieve all-round and full-time detection, monitoring and early warning of roads, bridges, tunnels and the like, stores data in a management and maintenance center for analysis, executes warning in a pile number position corresponding to the road, bridge and tunnel model, achieves network data share, and detects, monitors and manages the facilities at any nodes of a network, facilitates the analysis of safety accidents, timely processes potential hazards, reduces accidents, and has functions of intelligent traffic, intelligent management, intelligent maintenance and the like.

The invention discloses a tunnel safety monitoring information early warning system based on BIM. The system comprises an integration device, a data acquisition device, a central server, an alarm device, an access control device and the like. The integration device is connected to the central server through the data acquisition device. The central server is connected to the alarm device and the access control device. Compared with a traditional danger early warning technology, by using the system of the invention, two-way alarm is performed on people and a vehicle machinery, and through a GPSintelligent monitoring and locking technology, the machinery during a construction process is forcedly reset and locked so as to protect the safety of construction personnel and reduce safety accidents to a greater extent; and management personnel can accurately and timely grasp the number of construction personnel and the vehicle machineries in a tunnel, a problem can be timely discovered, and safety construction is ensured and omnibearing management to construction site personnel is realized. A BIM technology and a safety early warning technology are combined, the comprehensive monitoring and management of tunnel machinery construction are realized, and simultaneously the probability of safety accidents is reduced.

The invention discloses an entire-underground cable tunnel safety manhole being used also as a ventilation shaft, which pertains to the technical field of power supply and distribution circuits and comprises an underground firewall with a door, an aboveground firewall, a fire door, a propeller fan, a fire damper, a safety manhole, a vertical ladder, a stair hall, a sump pit and a dredge pump; wherein the safety manhole is also used as a ventilation shaft and adopts an entire-underground type. The entire-underground cable tunnel safety manhole has the advantages that: as the internal structure of the ventilation shaft is optimized, the requirements of ventilation, drainage, fire prevention and routing inspection of the cable tunnel are satisfied, and the entire structure of the ventilation shaft is arranged underground, thus solving the problem of the overall beautiful appearance of a factory and effectively reducing the construction cost. The channel and the ventilation opening of the ventilation shaft are integrated into one, thus being capable of being flexibly arranged without affecting the arrangement of other facilities on the ground in the factory district.

The invention discloses an unsymmetrical-pressure tunnel portal excavation protection structure and a method for constructing the same, and belongs to the field of tunnel engineering. The unsymmetrical-pressure tunnel portal excavation protection structure comprises a frame, pipe sheds, anchor ropes, antislip piles and side walls. The anchor ropes and the frame are anchored and connected with one another, so that slopes on the side surface of a tunnel can be supported; the side walls are arranged on shallowly buried sides of the tunnel; guide pipes penetrate the tops of the side walls to extend into a mountain, and holes can be drilled via the guide pipes; the pipe sheds penetrate the guide pipes, and the anchor ropes are nested in the pipe sheds; the antislip piles are arranged at the bottom of the frame, the bottoms of frame columns are connected with the tops of the antislip piles, and the anchor ropes penetrate the antislip piles to be anchored in stable regions of the mountain; spaces between the side walls and the mountain are backfilled with soil in a layered manner and are tamped; the insides of the pipe sheds and the anchor ropes are grouted in a time-sharing manner to reinforce the soil, the side walls and the antislip piles are connected with one another by the anchor ropes and the pipe sheds to form the integral structure, the integral structure is anchored in the stable regions of the mountain, and the tunnel is constructed in closed regions of the side walls, the antislip piles and the pipe sheds by means of underground excavation. The unsymmetrical-pressure tunnel portal excavation protection structure and the method have the advantages that protectors are formed before portals are excavated, the backfilled soil is beneficial to excavating the portals, unsymmetrical pressures can be reduced, the tunnel can be prevented from slipping, and unsymmetrical-pressure tunnel safety construction and operation can be guaranteed.

The invention discloses a drain-type pipe piece for tunnel lining. The drain-type pipe piece comprises a reinforced concrete pipe piece (1), a slurry injection hole (or a hoist hole) (1a) in the pipe piece (1), a load bearing steel bar (1b), and a concrete protective layer (1c) on the outer side; a water stop rubber block (2) capable of being expanded when being in contact with water is preburied in the concrete protective layer (1c) right opposite to one or two slurry injection holes (1a) of the pipe piece (1); a self-advancing type hollow anchor rod (3) is inserted in the slurry injection holes (or the hoist hole) (1a) of the pipe piece (1), then penetrates the water stop rubber block (2), and shoots out of the concrete protective layer (1c); and drain holes (3a) are formed in the rod wall of the outer end of the self-advancing type hollow anchor rod (3), and a filter column (4) used for filtering sand is plugged in the inner cavity of the self-advancing type hollow anchor rod (3). Lining built with the pipe pieces has a reliable drain function, and can reduce water pressure around the structure to ensure tunnel safety; and construction is convenient, small damage is caused to the pipe piece lining structure, and construction cost of the pipe piece lining is low.

The invention discloses a method for treating landslide of a tunneling working face with pipe penetration combined lagging jacks. The method comprises the steps that lantern ring lagging jacks (2) are installed in a safe area (1) of a tunnel one by one, wherein a certain number of lantern rings (3) are welded to the outer sides of the lantern ring lagging jacks (2); a steel pipe (4) penetrates through the lantern rings (3) of the lantern ring lagging jacks (2) in sequence and finally extends to the working face (5); sectional support lagging jacks (7) are installed on the portion, in a landslide area (6), of the steel pipe (4), wherein the adjacent lagging jacks are connected through horizontal pull rods (8), and a metal net (9) is laid above each sectional support lagging jack (7); a concrete pumping pipe (10) and an exhaust pipe (11) are reserved at the deepest landslide position. The invention discloses the specific method for combining and using the pipe penetration combined lagging jacks during treatment of landslide of the tunneling working face. The method effectively solves the problems of existing tunnel landslide treating methods that period is too long, the number of procedures is large, cost is high, and risk is high.

The invention discloses a bridging plugging device in a hidden-type deep, long and large cave and a governance method for water burst plugging. The device comprises a grouting tube of which the bottom part is stretched across the cave, a grout vent hole is disposed in the side wall of the lower part of the grouting tube, an expansible bridge bag covering the grout vent hole is disposed outside the grouting tube, and two ends of the bridge bag are fastened on the grouting tube by fasteners. The bridging plugging device in the hidden-type deep, long and large cave and the governance method for the water burst plugging disclosed by the invention are beneficial in that after a grouting material is poured into the bridge device in the plugging device, the grouting material and the bridge bag are consolidated into a whole, a water blocking bridge is formed in the deep, long and large cave to form a water blocking shield, and an isolation belt isolating water burst is formed; by pouring a highly expanding material, clearance between the water blocking bridge and the cave is blocked; cement mortar is finally used for thorough blocking and reinforcement; and the whole structure can ensure water blocking and reinforcement effects, can reduce or even thoroughly eliminate threats brought by underground water to safe tunnel operation, and can also reduce wasting of the grouting material. The bridging plugging device in the hidden-type deep, long and large cave and the governance method for the water burst plugging are both economic and safe.

The invention relates to a method for processing and excavating a large cave crossing through a tunnel body. The method comprises the steps of processing the cave; grouting in advance; excavating an arc-shaped pilot tunnel on the upper part; excavating the middle steps; excavating the lower steps; excavating the three layers of steps on the middle part. According to the method provided by the invention, the construction space is large; the mechanical construction is convenient; the parallel operation of multiple operation planes can be performed; the work efficiency is higher; the construction process can be flexibly and timely switched and the construction method can be adjusted when the geological conditions are changed; the method can adapt to different spans and various section forms; the primary lining process operation is convenient; on the basis of step-method excavating, the core soil is reserved, left and right staggered excavating is performed and the stability of the excavating plane is benefited; when the deformation of the surrounding rock is large or sudden, the closing time can be adjusted as soon as possible under the conditions of ensuring safety and meeting clearance requirement; the method can be widely applied to the tunnel excavating construction for quickly, safely and effectively passing the geological conditions on the stratum under special geological conditions of the cave, so as to ensure the construction and tunnel safety.

The invention discloses a highway tunnel safety monitoring system, which comprises a plurality of sound collection modules arranged in the tunnel, a sound recognition module connected with the sound collection modules, a display screen arranged above the entrance of the tunnel, and a A tunnel monitoring center for monitoring information processing and control; the display screen is used to display tunnel monitoring information; the sound collection module is used to continuously collect sound signals in the tunnel; the sound recognition module is used to identify the collected sound signals Whether there are collision sounds / human voices and judge whether there are abnormal events in the tunnel or not. By adopting the technical solution of the present invention, by applying the sound recognition technology to the tunnel monitoring field, and according to the special application requirements of the tunnel scene, the deep neural network is used to realize the tunnel sound recognition, thereby further improving the all-round monitoring of tunnel safety, and timely early warning Unusual events in the tunnel.

Theinvention provides a device and a method for mounting a recyclable surrounding rock fracture monitoring acoustic emission sensor, and belongs to the technical field of safety monitoring of mines and tunnels. A fixing hoop of the device is arranged on a fixing table; the fixing table is arranged on the inner wall of a mounting tube; a fixing clamping bolt is arranged on the back part of a recycling box; a sensor is arranged in the recycling box; a sensor signal wire passes through the recycling box; the fixing clamping bolt and the fixing hoop are used for fixing the recycling box to the fixing table; a cable wire is connected to the outside of the recycling box. During use of the device and the method, a protection tube provided with the sensor is arranged in a drill hole; the protection tube is coupled with the drill hole through a bonding material; and after monitoring is finished, the sensor and the recycling box are taken out from the back end of the protection tube. By adopting the device, the problems of difficulty in recyclingand mounting and the like of the sensor can be solved effectively. The device has the advantages of high reliability, good monitoring signal quality, convenience and rapidness in mounting, recyclability of the sensor and the like, the operation difficulty is lowered, the economical cost is reduced, the mounting efficiency is increased, and field popularization and application are facilitated.

The invention provides a tunnel safety construction control system, belongs to the field of tunnel construction, and aims to make dangerous situations pre-judged so that rescue and escape processes have linkage and coordination after the dangerous situations occur. The system comprises a positioning monitoring module collecting personnel information, a video monitoring module, a measuring module,an intelligent BIM control platform and an escape guiding module; the intelligent BIM control platform judges that surrounding rock is in a stable state according to dynamic deformation data of tunnelsurrounding rock and supporting structure, and judges that a work area is in a dangerous state according to video information; the danger category is identified according to the above, and a corresponding escape plan is made. The tunnel safety construction control system has the advantages that real-time information of tunnel structures, operating personnel and operation situation in the work area of a tunnel is integrated through the intelligent BIM control platform, the construction safety situation and operation personnel distribution in the tunnel can be known, so that the dangerous situations are prejudged, and the rescue and escape processes have the linkage and coordination after the dangerous situations occur.

The invention discloses a tunnel water gushing treatment structure and a construction method thereof and aims at solving the problem of potential risks to tunnels due to the existing tunnel water gushing treatment technology. The tunnel water gushing treatment structure comprises a guide separating device for preventing flow diffusion, the water inlet end of the guide separating device is arranged at the position of a tunnel water gushing head, the water outlet end is disposed on an inverted arch surface, a plurality of rows of grouting pipe groups are arranged annularly with the water gushing position serving as the center, and the length direction of each row of grouting pipe group is consistent with the gushed water flow direction. The tunnel water gushing treatment structure ensures the tunnel water gushing position and surrounding rock to be stable and is easy to construct, good in effect and low in construction cost.

The invention discloses a method and a device for realizing tunnel safety; the method comprises steps of: a tunnel initial point device transmits characteristic information of a data stream needing tobe transmitted by the tunnel to a tunnel terminal point device; the tunnel terminal point device distributes labels according to the characteristic information, transmits the distributed labels to the tunnel initial point device, and correspondingly stores the characteristic information and the distributed labels to a label list; the tunnel initial point device appends the distributed labels to an external surface message header of a data current message packaged by the tunnel and then transmits the data current message to the tunnel; when the tunnel terminal point device receives the data current message from the tunnel, the tunnel terminal point device acquires the characteristic information and the labels from the data current message, and determines whether the data current message islegal through looking up the label list. The technical solution of the invention can distinguish the forged tunnel message.

The invention belongs to the field of tunnel safety and discloses a tunnel traffic abnormal recognition alarming device which comprises a video image collecting module, a video image processing module, a central control module and an alarm module, wherein the video image collecting module comprises a camera, a coder, a first optical transceiver, an optical fiber, a second optical transceiver and a decoder which are successively connected; the video image processing module comprises an image pre-processing unit, a target recognition unit, a target detecting and tracking unit and a traffic parameter detection unit which are successively connected; the central control module comprises a traffic incidence detection unit and a system parameter setting unit; the output end of the decoder is connected to the input end of the image pre-processing unit, and the output end of the traffic parameter detection unit is connected to the input end of the traffic incidence detection unit; and the output end of the traffic incidence detection unit is connected to the input end of the alarm module. The device can provide passing vehicles with traffic states in the tunnel so as to avoid secondary accidents.

The invention discloses an application system for monitoring stress deformation of a tunnel, belonging to the tunnel safety monitoring technical field. The technical proposal of the invention is as follows: the application system comprises an eddy current sensor deformation acquisition cell array, a field signal acquisition and transmission unit, a data acquisition and processing server, and a data query and display terminal; the eddy current sensor deformation acquisition cell array comprises eddy current sensor deformation acquisition cells; each eddy current sensor deformation acquisition cell is connected with the field signal acquisition and transmission unit by an ordinary electric wire; the field signal acquisition and transmission unit is connected with the data acquisition and processing server by a CAN bus or an Ethernet; the data acquisition and processing server is connected with the data query and display terminal by the Ethernet. The application system provided by the invention has high testing precision and can monitor the integrated stress deformation of the tunnel, thus providing effective safeguard for the safe running of the tunnel.

The invention relates to the underground engineering loess tunnel safety construction field, and especially relates to the underground engineering loess tunnel ground surface settlement control construction process with strong pertinency and simple technology; settlement deformation monitor measurements are taken so as to realize dynamic monitor measurements in tunnel excavation construction, thus providing reliable data guarantee for safety construction; measurements like advanced support, steel arch centering support and timely concrete injection are taken so as to ensure tunnel surrounding rock composition stabilization; lime soil compaction piles are used for reinforcing the loess layer, and 37 lime soil is refilled, thus greatly improving construction security and composition stability; in construction, quicklime is used for chemical modification, thus optimizing loess property, improving loess intensity, and ensuring tunnel stabilization and safety.

The invention provides a cluster type tunnel safety real-time monitoring system based on the wireless fidelity (Wi-Fi) network technology. The safety monitoring conditions of several tunnels can be simultaneously displayed and analyzed by a tunnel safety real-time monitoring center adopting the system, decision makers can conveniently optimize the tunnel cluster maintenance in an overall plan region according to different appropriation budget; through the cluster type tunnel safety monitoring, the transverse comparison and unified management on the safety state data of several tunnels scattered in a larger region can be realized, the information lonely island situation that the information sharing cannot be realized among single tunnel safety monitoring systems in the prior art is thoroughly changed, and the vertical and transverse analysis comparison and study on the safety conditions of similar-environment different-structure tunnels or different-environment similar-structure tunnels in the region can be more convenient, so the optimization design of the tunnel structure is favorably promoted, and in addition, the maintenance and the reinforcement of several tunnels are realized.

The invention belongs to the field of shield underneath pass existing tunnel safety risk evaluation, and particularly discloses a shield proximity existing tunnel safety evaluation method based on data mining and data fusion. The method comprises the following steps: establishing a shield underneath pass existing tunnel safety evaluation index system and a risk grading standard; designing a Bayesian network by adopting a fault tree analysis method; obtaining an expert evaluation interval fuzzy set of a root node in the Bayesian network based on a group decision judged by an expert, and fusingthe expert evaluation interval fuzzy set by adopting an improved evidence theory to obtain fuzzy prior probability distribution of the root node of the Bayesian network; and based on the constructed Bayesian network model, carrying out risk probability reasoning and sensitivity analysis of shield underneath passing through the existing tunnel, and determining the safety risk level and key controlfactors of shield underneath passing through the existing tunnel. According to the method, more accurate and reasonable comprehensive evaluation of the safety risk of shield underneath passing throughthe existing tunnel is realized, and a powerful basis is provided for safety risk early warning and control decision of engineering.

The invention discloses a focusing sounding type three-dimensional induced polarization advanced detection system and method loaded on a TBM. The advanced detection system comprises an electrode system, an electrode telescoping device, a multi-path rotation device, a cable system and an induced polarization detection instrument; the electrode system is arranged on a TBM cutterhead, a shield, a trolley and a tunnel side wall, wherein electrodes on the cutterhead, the shield and the trolley are loaded on the TBM through the electrode telescoping device; and the induced polarization detection instrument controls the electrode telescoping device to realize automatic telescoping control over the electrodes, telescopic state detection and contact state detection, and the multi-path rotation device is adopted to realize uninterrupted rotation of measurement signals, hydraulic oil paths and cutterhead water paths and realize load integration of the induced polarization detection system and theTBM. The system and the method have the advantages that the problem of induced polarization advanced detection of a source of water and mud inrush disaster of a TBM construction tunnel can be solved,the automation degree of measurement is high, the safety, the rapidness and the reliability are achieved, three-dimensional inversion imaging can be carried out on a water-contained body in the frontof a tunnel face, and therefore the safe and efficient construction requirements of the TBM construction tunnel are met.

The invention discloses a submerged suspension tunnel with adjustable buoyancy, comprising a tunnel tube body, an anchoring system and a buoyancy adjusting system. The tunnel tube body is steadily suspended in water through the anchoring system; the buoyancy adjusting system is composed of a gas compressor, a gas tube and a buoyancy adjusting box. The buoyancy adjusting box is rigidly connected with the tunnel body and is provided with a water gate, and the buoyancy of the tunnel tube body can be adjusted by controlling the water intake amount of the buoyancy adjusting box through the gas compressor. The buoyancy adjusting box of the submerged suspension tunnel with adjustable buoyancy can provide extra support to the tunnel tube body when the tunnel tube body loses part of the buoyancy, thus getting rid of the influence of the water level change to the safety of the floating tunnel.