5599 results about "Tunnel construction" 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 invention discloses a carst region double-arch road tunnel construction method, which comprises the following steps; 1. carrying out construction preparation; 2. carrying out construction at channel openings; 3. adopting a three-pilot-tunnel method for constructing the channel inlet opening section, and adopting a step digging method for digging during the three-pilot-tunnel method construction; 4. adopting a middle-pilot-tunnel method for constructing the middle communication section of the channel, and adopting a full cross section method for digging during the middle-pilot-tunnel method construction; 5. adopting the three-pilot-tunnel method or the middle-pilot-tunnel method for constructing the channel outlet opening section, adopting the step digging method for digging when the middle-pilot-tunnel method is adopted for digging construction of the channel outlet opening section, and synchronously carrying out secondary lining construction from the front part to the back part in the digging construction process of the channel inlet opening section, the middle communication section of the channel and the channel outlet opening section. The invention has the advantages of reasonable design, simple and convenient construction, safe and reliable construction process, flexible construction mode, short construction period and greatly simplified construction steps, and effectively overcomes various defects during the traditional carst region double-arch road tunnel construction.

The invention discloses a tunnel construction method in a fault fracture zone, which comprises the following steps: a. adopting the method of combining geophysical prospecting and drilling and combining long-distance and short-distance to ascertain the geological situation in front, and carry out advanced geological prediction; b. adopting advanced Anchor construction, pre-grouting construction of the surrounding walls of small conduits in advance, and advance support construction of grouting pipe shed and steel frame, and advance pre-support; c. Tunnel excavation and support. It provides a theoretical basis for detecting the specific location, range and water inflow of the fault fracture zone; ensures the safety of tunnel construction; on the basis of analyzing the specific location and scope of the fault fracture zone and adopting a reasonable advanced pre-support method, comprehensive and specific According to the geological conditions, choose a reasonable tunnel excavation method. It has strong applicability for the construction of expressway tunnels crossing fault fracture zones; at the same time, it has reference and reference significance for the construction of railway, municipal and water conservancy tunnels (holes) with similar geological conditions.

The invention relates to a soil pressure balance type tunnel shield analog experiment system, a rectangular soil coelom with the upper part provided with an opening is internally provided with a shield machine model and filled with a simulated soil body, the axle wire of the shield machine model is overlapped with that of the soil coelom; the upper surface of the simulated soil body is covered with a layer of concrete cushion the upper surface of which is connected with a horizontal loading beam by more than two soil pressure jacks, the horizontal loading beam is connected with the bottom of the soil coelom by an anchor rope; and the simulated soil body is also internally embedded with a soil pressure box, a grating fiber optical sensor and a displacement meter, wherein, the soil pressure box, the grating fiber optical sensor and the displacement meter are all electrically connected with a data acquisition and processing device. The system can simulate the influence of shield tunnel construction between subways of cities on the stratum and surrounding environment more conveniently, actually and effectively, and provide more actual and accurate experimental data for tunnel construction and design so as to guarantee the high-efficiency and safety of the shield tunnel construction of cities.

The invention discloses a shield construction method of digging three parallel tunnels under a trunk railway, which belongs to the field of tunnel construction technology. The construction method of the invention comprises the procedure that: the model analysis on each construction sequence and method is made by a three-dimensional finite element and the shield construction sequence is selected; to select the reinforcement project of the railway bed is selected according to the influence degree of the dynamic stress, the load-carrying structural model is adopted to calculate and decide the shield area reinforcing bars enhancement project under the dynamic load of the railway train; the construction parameters are selected according to the test results and the performance of the shield machine, the front earth pressure is reasonably set , the synchronizing mortar injection is enhanced, the forward digging speed and the axis deviation are strictly controlled, the secondary mortar injection is made, the foam or mud is filled by utilizing a pre-embedded injection hole; the strict monitoring measures to monitor the shield construction process is adopted so that the construction unit can adjust the construction parameters in time and guarantee the construction safety. The invention not only guarantees the construction quality and the construction safety of the project but also creates good economic benefit.

The invention discloses a method for tunneling construction of a main structure of an underground station. In the method, the air shaft and air duct are excavated at first for the station and are then used as construction channels for excavation of the main structure of the station. The method for tunneling construction of the main structure of the station comprises the following steps: forming a reinforcing ring at the air duct port with a composite initial support; excavating the soil mass of a middle hole according to a certain sequence; constructing the internal structure of the middle hole; excavating the soil mass of a side hole; and constructing the internal structure of the side hole. The scheme can realize the smooth force transfer in the excavation of the soil mass, the initial support and the construction of permanent structures, avoid excessive adverse force-bearing states during the construction of the permanent structures, facilitate the construction, enhance the construction safety and construction efficiency, improve working conditions and ensure the quality of the project.

The invention discloses a testing device and a method of ground deformation caused by simulating metro shield tunnel construction, and belongs to the technical field of underground engineering experiments. The overall process that similar materials are used for simulating soil layer structures, a tunnel simulating device is used for simulating tunnel structures, and a ground loss simulation system is used for simulating disturbed soil around a tunnel and ground loss is included. After the installation of the device is completed, the ground loss simulation system is started, an airtight water bag which is filled with water by using a pressure water pump in advance is drained step by step through a drain pipe, and water discharge is accurately controlled through a water stop valve and a measuring tank. Moreover, the water discharge is recorded, the ground loss is simulated, a corresponding stratum is deformed, and then the earth surface subsides, the surface subsidence is accurately measured through a dial indicator, and a measured value is recorded. Stratum loss ratio is calculated out through conversion, and the stratum loss ratio and the subsidence measured value are made into forms and images together, and thereby the relation between the stratum loss ratio under different stratum structures and the surface subsidence can be measured out simply, conveniently and accurately.

The invention relates to a nuclear magnetic resonance detection device and a nuclear magnetic resonance detection method for the advanced detection of a water bodies in the front. In the device, a computer is connected with a system controller, a high-power power supply and a signal acquisition unit by a serial port bus respectively; and the system controller is formed by connecting a bridge circuit driver, a high-power H-shaped transmitting bridge circuit, a resonant capacitor and a transmitting coil. Compared with the prior art, the device can detect important information such as the existence of water-bearing bodies in the front, the water content of the water-bearing bodies and the like accurately and effectively. The occupied area of the coil is reduced effectively by a mode of arranging the coil vertically, so that the device can perform exploration in narrow space. The device can detect the underground geological condition within a certain distance in the front directly and accurately in production fields of coal fields and mines or construction sites of tunnels so as to reduce mine accidents caused by geological disasters such as water burst, mud gushing and the like due to unclear geological conditions in the front or various incidents caused by the geological disasters in the process of tunnel construction.

The invention provides a construction method for the continuous mucking, lining and excavation synchrony of tunnels (caves), which comprises the following steps: the front end of a belt conveyer is positioned in an excavation work area, the belt conveyer from the excavation work area to the lining area of a steel moulding plate trolley is positioned on an inverted arch precast block (6) or hung at the top of the tunnel; the belt conveyer in front of the steel moulding plate trolley causes a conveyer (7) to be positioned at one internal side of a moulding plate trolley gantry (4) when passing through the moulding plate trolley on the basis of being positioned on the inverted arch precast block or a cast-in-situ inverted arch; a falsework (14) is arranged in front of the moulding plate trolley (2) and positioned on a track (12) which is connected in front of the self-circulation of the steel moulding plate trolley; and the belt conveyer is positioned on the inverted arch precast block or hung at the top of the tunnel from a lining operating area to a tunnel entrance after passing through the steel moulding plate trolley. The construction method can realize the continuous mucking of the belt conveyer and the synchronous lining of the moulding plate trolley along with the excavation of the tunnel in tunnel construction and cause transport equipment such as cars or the track to transport facilities and other materials needed by tunnel construction.

The invention discloses a tunnel construction informatization dynamic monitoring system and a monitoring method thereof. The system comprises an industrial personal computer, a PLC (programmable logic controller) wireless controller, a high-configuration digital camera, a deformation monitoring sensitization part, digital display acquisition equipment, wireless transmission equipment and a dynamic design feedback device. The method includes: 1), controlling commands to be transmitted to the PLC wireless controller by a computer control main station and controlling the digital camera and the digital display acquisition equipment; 2), acquiring internal force monitoring data by the aid of the digital display acquisition equipment; and acquiring a deformation monitoring image via the deformation monitoring sensitization part by the digital camera; 3), transmitting a monitored value to the computer control main station by the aid of the wireless transmission equipment; 4), analyzing results by the computer control main station via a real-time analysis module; and 5), transmitting the analyzed results to the dynamic design feedback device, analyzing relative difference of the really monitored value and a standard value, and early warming in real time by an early warning module. The tunnel construction informatization dynamic monitoring system is scientific, safe and practical, the method is convenient, instant, fast and effective, and safety problems in construction monitoring of tunnels are avoided.

The invention relates to a construction method for allowing a shield to pass through an operated subway tunnel in a short distance under complex working conditions. The method comprises the following steps of: 1) analyzing a passing working condition mathematical model; 2) setting construction parameters; 3) establishing real-time monitoring in the passing period of the shield and monitoring of the tunnel and the surrounding environment; and 4) performing shield construction, namely performing construction parameter control, synchronous grouting and double-liquid grouting. By the method, the shield can successfully pass through the operated subway tunnel, and safe operation of a subway train is ensured.

The invention discloses a method for exchanging a tool of a shield machine for tunnel construction, which comprises the steps of: (1) soil cabin replacement filling: performing the process of soil cabin replacement filling by using a spiral excavating machine and a slip casting system synchronously working with the spiral excavating machine; (2) advanced slip casting inside the machine: beating a plurality of slip casting pipes into the soil on the upper part of the shield machine from inner to outer inside the shield machine by respectively passing through a plurality of advanced geologic holes and then synchronously injecting cement paste into the soil on the upper part of the shield machine through the slip casting pipes by using a slip casting device till the cement paste cannot be injected any more; (3) cleaning cabin and exchanging tool synchronously: manually cleaning the cement plaster solidified inside the soil cabin and synchronously exchanging the tool mounted on the shield machine; and (4) getting rid of the difficult position of the shield machine and recovering the process. The method provided by the invention has the advantages of reasonable design, convenience for operation, low cost, high safety factor, good use effect and capable of solving the problem that the tool cannot be exchanged in the traditional tool exchanging mode under severe tool exchanging conditions.

The invention relates to a muddy water balance type shield simulation testing system. In the structure of the system, a model box for holding soil is fixed on a base; a refrigeration freezing device is communicated with a freezing pipe in the model box; the front part of a shield machine enters the model box through a guide sleeve on the side of the model box; a cutter disk at the front part of the shield machine is connected with the output shaft of a gearbox of a hydraulic power system through a main shaft; jacks at the left and right sides of the shield machine are connected between the model box and the gearbox; a space between a partition plate behind the cutter disk of the shield machine and the cutter disk forms a muddy water cabin; and an injection pipe of a muddy water pot, whichis connected with an air pressure boosting device, penetrates into the shield machine from the tail part of the shell of the shield machine. The system provided by the invention can simulate the tunneling process of the muddy water shield machine in a submerged tunnel construction with high water pressure and can synchronously record soil pressure, water pressure, displacement and the tunneling parameters of the shield machine, thereby finding out and analyzing the mechanism and conditions of muddy water pressure balance country rock and providing more reliable experiment basis for submerged tunnel construction and the design of a muddy water shield machine.

The invention discloses a device and a method for a physical simulation test of the stability of a deep tunnel surrounding rock and relates to a rock-soil mechanic technology. A structure of the device is that a pressure plate is covered on a sample in a deep tunnel rock body model instrument, and a vertical pressure system is arranged on the pressure plate and used for loading so as to simulate and exert gravity stress. A miniature shield machine drills into the sample from a drilling surface, and the miniature shield machine, a stepless speed changing box and a motor are sequentially connected to achieve drilling. Eight optical fibers and six strain gauges are distributed in the sample, the optical fibers are connected with a distributed optical fiber monitoring system, and the distributed optical fiber monitoring system and the strain gauges are respectively connected with a data acquiring system so as to achieve detection and recording. By means of the device and the method for the physical simulation test of the stability of the deep tunnel surrounding rock, a development and change law of stress strain when a deep tunnel rock body is excavated in tunnel construction can reappear accurately, and a novel solving path for researching the stability of the grotto surrounding rock and forming mechanism of rock burst in the tunnel construction.

The invention discloses a life-cycle management system and method for tunnels. The life-cycle management system comprises a production management subsystem, a transport management subsystem, a construction management subsystem and an operation management subsystem, wherein the production management subsystem is used for completing quality detection of pipe sheets in various stages of production process during production of tunnel pipe sheets; the transport management subsystem is used for acquiring position information of the pipe sheets during pipe sheet transport; the construction management subsystem is used for correlating recorded various data sources with a BIM (building information model) during tunnel construction, and realizing analogue simulation of tunnel construction process by means of a shied tunneling method through real-time synchronous data operation and the BIM; the operation management subsystem is used for acquiring production, construction and historic health monitoring information of various pipe sheets and determining health conditions of operating tunnels by combining with the analysis of the BIM. By the life-cycle management system and method for the tunnels, tunnel life cycle can be monitored and managed at various stages of production and transport of the pipe sheets and construction and operation of the tunnels, and monitoring efficiency is improved.

The invention discloses a track and posture composite control method in a shield tunneling process. The method comprises the following steps of: performing control by setting threshold values for a posture and a track; immediately adjusting the posture as long as the posture deviates to exceed the limit even though the track does not reach a deviation correction threshold; solving current positional deviation Si and angular deviation theta I of a shield machine through measurement and calculation when a shield works; continuously propelling the shield machine when the Si is less than or equal to a positional deviation threshold value Scmin of a track and posture composite controller and theta i is less than or equal to an angular deviation threshold value theta cmin of the track and posture composite controller or when the Si is less than or equal to positional allowable deviation Smin of actual tunnel construction and theta i is equal to 0; contrarily, automatically adjusting propelling pressure of a hydraulic cylinder of each sub-region and propelling displacement to simultaneously eliminate the positional deviation and the angular deviation generated in a tunneling process. Thus, an actual tunneling route of the shield machine is controlled within a design axial range of a tunnel, unnecessary overbreak and underbreak are avoided, and the forming quality of the tunnel is improved.

The invention relates to an advanced geological forecast method in the tunnel construction filed, comprising the following steps of: determining a hole prospecting proposal according to a middle or short term forecast and placing a radar antenna in after a hole is drilled to collect radar signals and determine whether any abnormal geologic body exists; if no geologic body exist, continuing construction; if geologic body exists, drilling again, placing a radar antenna in so as to collect signal and determine whether any abnormal geologic body exists; if no geologic body exist, continuing construction; if geologic body exists, drilling again and placing a radar antenna in so as to collect signals. Describing the spatial positions of the abnormal geologic bodies according to the signals obtained during the three times so as to provide operational geologic information for further processing. The advanced geological forecast method can be used in a wide exploration scope, can accurately forecast the abnormal spatial geologic phenomenon in front of an excavating face, provides reliable assurance for reducing collapse and rapid construction, is applicable to exploration of high resolution at deep underground and deep tunnel excavating face and is an uniquely feasible and effective exploration means to deep engineering in many cases.

The invention discloses a test method and a test device for simulating stratum deformation caused by pipe jacking construction. The test method comprises the following steps: (1) installing a lateral flexible loading bag; (2) filling with earth; (3) installing a simulated jacking pipe; (4) installing a loading system; (5) loading; (6) monitoring an initial value; (7) simulating an excavated stratum loss process; and (8) organizing and analyzing test data. The lateral flexible loading bag is adhered to the inner wall of a model box, the left end of the model box is connected with the lateral flexible loading bag, the right end of the model box is connected with a lateral loading pressure gauge, and the lateral loading pressure gauge is connected with a lateral loading booster pump through a lateral pressurizing water injection pipe; an exhaust valve is arranged at the top of the lateral flexible loading bag; a circular hole is formed from the front side wall of the model box to the bottom of the model box; studs are welded at the periphery of a circular jacking pipe preformed hole; the right end of the simulated jacking pipe is placed in the circular jacking pipe preformed hole in the front side wall of the model box, and the left end of the simulated jacking pipe is placed close to the rear wall of the model box. The test device disclosed by the invention is reasonable in structure and convenient to operate and is used for simulating a model test of stratum deformation caused by pipe jacking tunnel construction.

The invention belongs to the technical field of tunnel construction, and relates to a low-alkaline liquid accelerating agent and a preparation method thereof. For the low-alkaline liquid accelerating agent, aluminium sulfate solution is neutralized with sodium aluminate solution to produce aluminium hydroxide collosol, and then aluminium sulfate and aluminium hydroxide collosol conduct polymerization reaction in an original solution system to produce polymerized aluminium sulfate, so that the accelerating agent solution has higher aluminium ion content and liquid stability; the low-alkaline liquid accelerating agent is prepared by aluminium sulfate, sodium aluminate and stabilizing agent; and the mass percentage of the components are as follows: 40 to 60 percent of aluminium sulfate, 6 to12 percent of sodium aluminate, 0 to 0.2 percent of stabilizing agent, and the balance of water. The invention has the following positive effects to sprayed concrete: initial set of common cement can be realized in five minutes and final set of the common cement can be realized in eight minutes under lower doping amount; the 1d strength of cement mortar can reach more than 12MPa, and the 28d compression strength ratio of the cement mortar is more than 100 percent; and the invention has good adaptability to cement of different varieties.

The invention discloses a treatment method for fault fracture zone collapse in the tunnel construction process. The method includes the steps that firstly, arch reinforcement is conducted on every two adjacent surrounding rocks in a collapse segment; secondly, a collapse body is removed, and concrete is jetted to the collapse tunnel face after the collapse body is removed to close the collapse segment; thirdly, a lifting jack acts on the four corners of each bottom of racks of formworks, the interval identical to the width of a steel arch is reserved between the formworks, formwork erection is conducted in time, and the formworks and the steel arch jointly form a supporting layer; fourthly, through holes reserved in the formworks in advance, an arch apex concrete layer is formed in a high-pressure grouting mode, and small grouting guide pipes are punched into arch springs and the side walls of the steel arch; fifthly, the front end of a bottom die composed of the formworks and the steel arch is grouted and reinforced through the small guide pipes, operation of the next construction circulation stage of the collapse segment is conducted, and the first step, the second step, the third step and the fourth step are specifically repeated; sixthly, after second circulation is finished, supports of arch protecting layer concrete are formed through conveying ports embedded through the second step.

The invention relates to a tunnel construction information monitoring system based on three-dimensional scanning point cloud. The system comprises the following realization steps: acquiring coordinate information, intensity information, grey information, pixel information and the like of a tunnel full-section spatial structure by adopting a three-dimensional scanning point cloud measuring technology, performing automatic filtering processing and point cloud data automatic splicing and generating a tunnel two-dimensional plane model and a three-dimensional space model; realizing the continuous real-time transmission of monitoring data and data flow by adopting a '5S' parallel communication method; introducing a time, motion and rotation multi-dimensional coordinate axis, describing the change posture in a plane, the change posture of a vertical plane and the change posture along with time, performing data filtering and data analysis and realizing seamless butt joint between a monitoring and analysis structure and project construction information; based on an internet of things technology, by adopting a B/S framework and a three-layer system mode as well as seven-level security management, realizing the data monitoring as well as advanced forecasting and construction information real-time processing, update, inquiry, browsing, three-stage early warning and forecasting and three-level risk management.