190results about How to "Quick erection" patented technology

The invention belongs to the field of tunnel construction, and discloses a multifunctional arch support trolley. The trolley comprises a trolley body. A main arm frame, a right auxiliary arm frame anda left auxiliary arm frame which the rotation and stretchable functions are arranged on the trolley body. The main arm frame is located between the right auxiliary arm frame and the left auxiliary arm frame. A support clamp for clamping / supporting arch supports is arranged at the end of the main arm frame, and a rotation mechanism is arranged in the support clamp so as to control the arch supports to rotate; the ends of the right auxiliary arm frame and the left auxiliary arm frame are each provided with a worker operation platform. The multifunctional arch support trolley can transport folded steel arch supports into the tunnel stably, and perform direct changes inside the tunnel, meanwhile after the arch supports are transported to a preset place inside the tunnel, the folded steel archsupports can be safely, rapidly and stably lifted to the preset height, and the operation requirement for multi-step long-distance lifting is met.

The invention discloses a power stringing line-cross device which comprises a pedestal fixed on the upper end of an insulating rod and an upper cover hinged and buckled to the pedestal. A base wheel is installed in a pedestal groove of the pedestal, and an auxiliary wheel is installed in an upper cover groove of the upper cover through an adjusting device. A support bar is fixed to the outer wall of the pedestal, a transfer rod is hinged to the tail end of the support bar, and an upper connecting rod is hinged to the upper end of the transfer rod. The upper end of the upper connecting rod and the outer wall of the upper cover are correspondingly hinged together, and an upper sliding sleeve slidingly sleeves the lower section of the transfer rod. An insulating bar downwardly extending along the insulating rod is hinged to the central section of the upper sliding sleeve, and an intermediate sliding sleeve in sliding fit with the insulating bar in the axial direction is fixed on the insulating rod. The upper portion of the insulating rod is provided with a swinging chamber matching with the lower section of the transfer rod. The power stringing line-cross device can be rapidly assembled and erected, enables line crossing, jumping and leading on the ground, and is easy to operate and high in safety. No climbing is required.

The invention relates to an agricultural deep-well aid device, belonging to the technical field of aid salvage equipment, which comprises a foldable external device and a winding engine arranged on the top of the foldable external device in a matched mode, wherein the winding engine is in wireless communication connection with a signal transceiver; the foldable external device is a hollow cylinder with the interior capable of containing the well aid device; the top of the well aid device is provided with a rope mounting bracket in a matched mode; a rope on the well aid device passes through the rope mounting bracket and is connected with the winding engine; and the well aid device, the winding engine, the signal transceiver and a control system of a computer are connected through wireless signals. The invention adopts the above technology and has the advantages that the time and the labor are saved; the stability is good; the aid device is controlled and operated by a computer in the course of aid; the flexibility of the aid device in the course of well activities is enhanced; the flexibility of aid is increased; and the success rate of the aid is enhanced.

The invention discloses a wire crossing device for power stringing, and the device comprises a pedestal fixedly disposed at the upper end of an insulating rod, and an upper cover which is hinged to the pedestal in a buckled manner. The interior of a pedestal groove of the pedestal is provided with a return pulley, and the interior of an upper cover groove of the upper cover is provided with an auxiliary wheel through an adjustment device. The outer wall of the pedestal is fixedly provided with a supporting rod, and the tail end of the supporting rod is hinged to a transmission rod. The upper end of the transmission rod is hinged to an upper connecting rod, and the upper end of the upper connecting rod and the outer wall of the upper cover are hinged together in a corresponding manner. The lower segment of the transmission rod is slidingly provided with an upper sliding sleeve in a sleeving manner, and the central part of the upper sliding sleeve is hinged to an insulating bar which extends downwards. The insulating rod is fixedly provided with a central sliding sleeve which is in sliding fit with the insulating bar in the axial direction. The upper part of the insulating rod is provided with a swinging cavity which cooperates with the lower segment of the transmission rod. The device can be quickly assembled and set up, can complete the wire crossing, selection and leading functions on the ground, is simple in operation, does not need climbing, and is high in safety.

The invention discloses a pneumatic type vertical lift remote monitoring system for a crop image. The remote monitoring system comprises three parts including a pneumatic type lifting rod, a cradle head camera and an Internet of Things remote control system. The Internet of Things remote control system comprises a lifting rod state remote control module and a crop imaging remote control module. The lifting rod is arranged in a proper position in the field, the cradle head camera is fixed at a camera saddle at the top end of the lifting rod, and height adjustment of the lifting rod and camera imaging are both completed by the remote control system. The remote monitoring system has the advantages that the structure is simple, the height of the lifting rod and the shooting angle of the camera can be remotely and automatically adjusted, the crop shooting can be carried out from different lateral surfaces and orientations, the crop imaging from different lateral surfaces can be obtained, and the remote monitoring system is convenient for a user to master the crop growth situation more accurately and for a crop specialist to carry out remote diagnosis. Through the Internet of Things remote control system, the remote monitoring system supports snapshot and uploading of a field image and can utilize information, such as crop growth, color and texture, from the image.

The invention discloses a machinery-driven foldable trestle bridge, which mainly comprises a base, a platform wagon, a walking mechanism, a portal support, a rotating mechanism, a winch, a hydraulic system, an electrical system and the like, wherein the hydraulic system and the electrical system form a trestle bridge control system. The bridge span is foldable, and can consist of two, three or four segments; a hydraulic turnover mechanism is arranged among the bridge segments; and when the bridge is used, the hydraulic turnover mechanism unfolds or folds the bridge span. The foldable machinery-driven trestle bridge has the advantages of small occupied area, low labor intensity, convenient operation, quick bridging and folding, and the like.

The invention relates to an assembly type steel bridge and a building method of the steel bridge. The assembly type steel bridge comprises supporting frames, a bridge deck slab, an H-shaped beam, bridge deck slab connecting parts and H-shaped beam locking mechanisms. The H-shaped beam is arranged on the supporting frames. The extension direction of the H-shaped beam is perpendicular to the extension direction of the supporting frames. The supporting frames support the H-shaped beam. The bridge deck slab is laid on the H-shaped beam. The supporting frames and the H-shaped beam are fixedly installed through the H-shaped beam locking mechanisms. The H-shaped beam and the bridge deck slab are fixedly installed through the bridge deck slab connecting parts. According to the steel bridge, the number of components is small, the structure is light and simple, erecting is fast, assembling, disassembling and replacing are convenient, the components can be purchased in batches according to the requirement of the construction progress in the construction and installation process, and installing and erecting are carried out while materials enter the site; in the disassembling process, disassembling is carried out while the materials are moved out of the site in batches, and the problem that due to stacking of the materials, construction of other special projects is influenced can be effectively solved.

The invention discloses a measuring instrument and a measuring method for the verticality and the azimuth of a pile hole. The measuring instrument comprises a measuring rod, a hinge, a support rod, asliding base, two first support parts, a second support part, a water level gauge, a compass, a first laser range finder, a second range finder, and a scale. Each support part comprises a support cylinder, a support telescopic rod, a first fixing knob, and a fixing rod. The middle part of the support rod is connected to the measuring rod through the hinge. The sliding base is slidably connected tothe second measuring rod. Two first support parts are arranged at the two ends of the support rod. The second support part is arranged at the bottom of the sliding base. And the water level gauge andthe compass are arranged at the measuring rod. According to the measuring instrument and the measuring method for the verticality and the azimuth of the pile hole, the measuring instrument realizes the fast and accurate measurement of the verticality and the azimuth of the pile hole, by arranging the measuring rod, the hinge, the support rod, the sliding base, the two first support parts, the second support part, the water level gauge, the compass, the first laser range finder, the second laser range finder, and the scale.

The invention discloses a telescopic emergency bridge which comprises a transport operation vehicle, a bridge main body, a hydraulic system, a supporting plate and a control cable system. The bridge main body comprises two lateral frameworks which are formed by sequentially connecting multiple movable crosses through end hinges. A plurality of parallel horizontal rods are arranged between the two lateral frameworks, and the two ends of each horizontal rod are fixedly connected with the end hinges of the movable crosses at corresponding positions of the lateral frameworks. A bridge deck slab is arranged on every two adjacent horizontal rods on the lower portion of each lateral framework, a longitudinal supporting rod is arranged on every two adjacent horizontal rods on the upper portion of each lateral framework, the two ends of each lateral framework are respectively provided with a bridge end post, a telescopic device is arranged in each bridge end post and extends out of the lower end of bridge end post, and guide wheels are arranged at the lower ends of the telescopic devices. The telescopic emergency bridge is high in pertinence, low in weight, low in requirement for operation sites, high in erecting and detaching operation speed, and high in automation degree.

The invention relates to an integrated transport track type multipurpose mechanized fast obstacle-surmounting bridge, and belongs to the field of mechanized bridges. In the obstacle-surmounting bridge, a first bridge section, a second bridge section, a third bridge section and a fourth bridge section are rotatably connected with a middle bridge section, unfolding and overturning are realized by anunfolding and overturning erection mechanism between the bridge sections, locking is realized by a transverse hydraulic inserting pin, and supporting is realized by a supporting mechanism at the bottom of the bridge sections; when the obstacle-surmounting bridge is not erected, the second bridge section and the middle bridge section are locked and arranged on a track frame bridge vehicle, and theremaining bridge sections are overlapped on the second bridge section and the middle bridge section; during erecting, the first bridge section, the third bridge section and the fourth bridge sectionrotate around all connecting points under pushing of the unfolding and overturning erection mechanism and are locked through the transverse hydraulic inserting pin after been unfolded to place; in theerection process, the supporting mechanism is extended to make contact with the ground for supporting; and after erection, the bridge sections and the track frame bridge vehicle are unlocked and separated, and the obstacle-surmounting bridge is formed. The obstacle-surmounting bridge adopts mechanized operation, a bridge for surmounting an obstacle can be erected quickly, road transporting requirements are met by integrated assembly, railway transporting requirements are met by split assembly, and supporting by the track frame bridge vehicle is not required after erection is completed.

The invention discloses a mixed prestress-based construction method of an assembling type corrugated steel web combined box girder. A combined girder body formed by transversely and longitudinally connecting multiple I-shaped girder body units, wherein each I-shaped girder body unit is formed by splicing a prefabricated concrete top plate, a prefabricated concrete base plate and a corrugated steel web plate which are independently prefabricated; transverse connection steel bars, longitudinal connection steel bars and top plate prestress ducts are buried in the prefabricated concrete top plates, and multiple upper stud notches are formed in two sides of the prefabricated concrete top plates along the longitudinal direction in a spacing manner; transverse connection steel bars, longitudinal connection steel bars, pretensioned prestress steel strands and base plate prestress ducts are buried in the prefabricated concrete base plates, and multiple lower stud notches are formed in two sides of the prefabricated concrete base plates along the longitudinal direction in a spacing manner; flange plates with stud groups are welded at the upper and lower ends of the corrugated steel webs. The girder body is erected in a block prefabricated and assembled structural form; the volumes and the weights of all the components are relatively small, so that the girder body can be stably transported and safely hung and is favorable for construction.

The invention relates to a method in the technical field of environment protection, in particular to a micro-nano iron sulfide / porous carbon composite material, a preparation method thereof and seaweed biomass application. The preparation method includes: utilizing seaweed biomass to promote sulfate bio-reduction to generate iron sulfide to cover the surface of the seaweed biomass; carbonizing the seaweed biomass through mild hydrothermal reaction to generate a porous carbon material loaded with micro-nano biological iron sulfide. Various technical problems in the face of high-value utilization of the seaweed biomass can be effectively solved, early investment infrastructure expense is low, and a reactor can be quickly and emergently set up according to harvesting places and centralized harvesting and salving time of seaweed to prepare the micro-nano iron sulfide / porous carbon composite material. The micro-nano iron sulfide / porous carbon composite material prepared by the method can be applied in water pollution control, soil (sediment) improvement or polluted environment restoration.

The invention discloses a telegraph pole base. The telegraph pole base comprises a bottom seat, rails, an arc-shaped support pipe, a first support assembly, an arc-shaped fixing clamp assembly and second support parts; the rails are arranged at the bottom of the bottom seat; the arc-shaped support pipe is arranged on the top face of the bottom seat; the first support assembly comprises at least two support rods, one end of each support rod is connected with the arc-shaped support pipe, and the other end of each support rod is connected with the bottom seat; the arc-shaped fixing clamp assembly comprises at least two arc-shaped fixing clamps which are detachably connected with the arc-shaped support pipe, and the arc-shaped support pipe and the arc-shaped fixing clamps form a circle matched with the outer diameter of a telegraph pole in an enclosing mode; one end of each second support part is connected with one arc-shaped fixing clamp in the arc-shaped fixing clamp assembly, and the other end of each second support part is connected with the bottom seat. According to the telegraph pole base, the telegraph pole can be quickly erected and disassembled, and the working efficiency of maintenance personnel is improved; meanwhile, water soaking can be prevented, and therefore the service life of the telegraph pole is prolonged; operating personnel can regulate the position of the telegraph pole base in a wired mode, therefore, the operation procedures are further simplified, and the efficiency is improved.

The invention belongs to the technical field of bridge engineering, and relates to a system of cable hoisting and swivel construction. The system of cable hoisting and the swivel construction comprises a first tower and a second tower which are symmetrically arranged on both banks of a river respectively, and further includes a load bearing subsystem, cable saddles for supporting a load bearing cable and a running trolley arranged on the load bearing cable, wherein the load bearing subsystem comprises the load bearing cable, and two ends of the load bearing cable are fixed on a first ground anchor and a second ground anchor which are oppositely arranged on the banks of the river respectively, and the cable saddles are internally provided with three layers of cable saddle pulleys, namely an upper layer cable saddle pulley, a middle layer cable saddle pulley and a lower layer cable saddle pulley; the cable saddles include a first cable saddle disposed at the top of the first tower and a second cable saddle disposed at the top of the second tower, and the system of cable hoisting and the swivel construction also includes a hoisting subsystem, a traction subsystem and a tower top cable saddle sidesway subsystem. According to the system of cable hoisting and the swivel construction, by means of the combination of cable hoisting and the swivel construction, the construction progress and the bridge construction quality of an arch bridge can be improved, and the construction cost can be reduced.

The invention provides a dustproof accelerograph portable box which comprises a main box body and a box cap. The main box body is internally provided with a vice box body. The upper edge of the vice box body is provided with an upper lap joint edge body in an outward extending mode, and a lower lap joint edge body is arranged at the top of the side wall of the main box body in an inward extending mode. The upper lap joint edge body is superposed on the lower lap joint edge body and connected with the lower lap joint edge body through bolts. The vice box body is internally provided with a lower buffering block, and the box cap is internally provided with an upper buffering block. An up-down buckled accelerograph accommodation cavity is formed by the lower buffering block and the upper buffering block. The outer side wall of the main box body is provided with a telescopic storage plate. The lower end of the telescopic storage plate is rotatably connected with a box body. The upper end of the telescopic storage plate and the side wall of the main box body are provided with magnets which are in attractive fit. The main box and the front side wall of the box cap are provided with connecting lock catches. The dustproof accelerograph portable box has the beneficial effects that the portable box is reasonable in structural design, capable of conveniently carrying an accelerograph, good in shock absorption effect and dustproof effect and capable of being rapidly erected at a monitoring site, and working efficiency is improved.

The invention belongs to the technical field of parking lot parking place monitoring, and particularly relates to a parking place monitoring system based on a bluetooth technology and a method thereof. At least one set of BLE node equipment only having a bluetooth communication function is arranged at a parking place ground center position, one set of BLE node equipment is arranged at the corresponding position of the top part of a parking lot, and a BLE intelligent gateway is arranged in the internal part of the parking lot; and communication between the BLE node equipment of the top part and the BLE node equipment of the ground is established via the BLE intelligent gateway. The beneficial effects of the parking place monitoring system based on the bluetooth technology and the method thereof are that accurate judgment of the parking place occupation situation can be realized by the simple BLE node equipment (the equipment only has the bluetooth communication function) so that parking lot parking place monitoring can be realized. Compared with relatively conventional parking place monitoring modes of infrared detection and video monitoring, complex indoor wiring and indoor reconstruction are not required, construction cost is low, and rapid installation and erection of the system can be realized.

The invention discloses a deep well rescue robot, and belongs to the technical field of robots. The deep well rescue robot comprises a folding external connection device and a winch which is arranged on the top of the folding external connection device in a matched manner and is in wireless communication connection with a signal receiving and transmitting device; an underground rescue device is arranged in a hollow column of the folding external connection device in a matched manner, a rope fixing frame is arranged on the top of the underground rescue device in a matched manner, a rope of the underground rescue device penetrates the rope fixing frame and is connected with the winch, the underground rescue device, the winch, the signal receiving and transmitting device and a computer control system are connected through wireless signals, and a set of universal wheels are arranged at the bottom in a matched manner; a movable telescopic support is arranged on the lower portion of a hollow cylinder in a matched manner, and a clamping buckle used for fixing the telescopic support, a positioning pin hole used for fixing the underground rescue device and a handle facilitating moving of the device are arranged on the hollow cylinder in a matched manner. The deep well rescue robot is convenient to use, high in safety coefficient, suitable for fishing persons or objects in small-opening-diameter deep wells of the country and capable of providing great convenience for life of people.

The invention relates to a tension trolley supporting and locating guide pulley capable of ascending and descending. The tension trolley supporting and locating guide wheel capable of ascending and descending comprises a guide pulley support. A guide pulley body set is arranged on the guide pulley support, four landing legs are connected to the bottom of the guide pulley support, and each landing leg is correspondingly provided with a plurality of screw holes. Ascending and descending of the guide pulley are realized by adjusting the height of the landing legs on a tension trolley support, the guide pulley body set can support and locate cables, and therefore the effect that the cables are smoothly erected is guaranteed.

The invention discloses a jack-knife bridge, which comprises a fixed bridge body wedge block, a floating bridge body wedge block, a plurality of intermediate bridge body wedge blocks, a driving device, an upper guy cable, a first lower guy cable and a second lower guy cable, wherein the winding direction for connecting the upper guy cable and the first lower guy cable is opposite to the winding direction for connecting the second lower guy cable and the driving device; and the driving device drives the upper guy cable, the first lower guy cable and the second lower guy cable so as to control the state of the jack-knife bridge. Apart form the advantages of quick transportation and bridging of the jack-knife bridge, the jack-knife bridge provided by the embodiment of the invention has the advantages of an open bridge that the width and headroom of the bridge can be properly adjusted for ships under the bridge so that the ships of different sizes can pass through the bridge; and in addition, the jack-knife bridge has the characteristics of simple structure, rational stress, no need of overmuch hydraulic unit driving and greatly reduced construction cost. The invention also provides a jack-knife bridge system.

The invention discloses a construction method for an ultra-high-performance concrete corrugated steel web composite box girder bridge. The construction method comprises the steps that a U-shaped groove structural part of each span of box girder is prefabricated according to the design requirements at first; a bridge floor middle plate is prefabricated according to the prefabricated U-shaped groove structural part; a bridge abutment and a bridge pier are constructed, the prefabricated U-shaped groove structural part and the bridge floor middle plate are hoisted in position, transverse connecting steel bars are bound, and after transverse wet joints are poured, the complete box girder is formed; the next bridge pier is constructed, a second box girder is hoisted in position, corrugated steel webs of the adjacent box girders are welded, longitudinal connecting steel bars between the adjacent box girders are bound, longitudinal wet joints between the adjacent box girder segments are poured or a cross girder is casted in place, and a continuous bridge structure is formed; after wet joint concrete reaches the designed strength value, top plate prestressed steel strands are tensioned; and the above steps are repeated, so that the multi-span continuous bridge structure is completed. According to the construction method for the ultra-high-performance concrete corrugated steel web composite box girder bridge, the box girders are light in weight and small in torsional distortion, the bridge floor plate load distribution capacity is good, construction and erection are convenient, and the construction method has wide application prospects in large and middle span bridges.

The invention discloses a coal mine underground cable fixing traction device and an operation method. The coal mine underground cable fixing traction device comprises a fixing plate, an installation block, a clamping mechanism installed between the installation block and the fixing plate, rotating frames installed on the two sides of the top face of the installation block, rotating shafts connected between the rotating frames in a sleeving mode, rollers connected to the rotating shafts in a sleeving mode, limiting mechanisms installed between the rotating shafts and the rotating frames, and sliding rods; the tops of the sliding rods are connected with pressing plates, and locking mechanisms are installed between the two ends of the installation block and the sliding rods. The fixing plateis fixed to the inner wall of a mine through bolts, the mounting block is clamped and fixed to the fixing plate through the clamping mechanism, sliding locking of the sliding rod is controlled throughthe locking mechanism, when the locking mechanism is unlocked, the sliding rod can slidably adjust the distance between the pressing plate and the rollers, and the distance is increased so that a cable can penetrate through and be pulled conveniently. The rollers roll to make contact with the cable through rolling friction, the cable is prevented from being scratched, the limiting mechanism enables the rollers to roll in one direction, traction is facilitated, the cable is prevented from being pulled out in different directions, and after traction is finished, the pressing plate presses the cable to be clamped and fixed.

The invention relates to the technical field of deep treatment and recycling of sewage and particularly relates to a device for treating and recycling aquaculture water and a treatment method. The device comprises a baffle deep-bed filtering tank system and a fault seepage reoxygenation nitration bed, wherein a water outlet of the baffle deep-bed filtering tank system is connected with a water inlet of the fault seepage reoxygenation nitration bed through a pipeline; the baffle deep-bed filtering tank system comprises at least one independent baffle deep-bed filtering tank; a water inlet and awater outlet are respectively formed in positions at the same height on two sides of the baffle deep-bed filtering tank system. The water quality indexes are monitored after the water is treated by the device; the pH is controlled to be 7.8-8.2; the content of ammonia nitrogen is less than 0.3mg / L; the content of nitrite is less than 0.1mg / L; the content of dissolved oxygen is not less than 4.0mg / L; the growth requirements of the aquaculture animals can be met, so that the aquaculture water can be deeply treated and recycled.

An object-oriented commercial web-station erecting system comprises a web server, a database server and a database, wherein the web server manipulates a web-station developing platform for erecting commercial web-station on the web-station; the web-station developing platform is realized through the object-oriented technical programming and comprises a plurality of preset categories, and the commercial logic object suitable to the commercial web-station to be erected can be derived from the preset categories. The database server and the database commonly provide the storage and the access of the information required by the web-station developing platform and the commercial web-station to be erected. Through above system the web-station designer can erect quickly and maintain simply commercial web-station and extent the erected commercial web-station, modifying its commercial logic object without re-compilation being necessary.

The invention relates to a grid steel bridge deck, which is characterized in that the bridge deck consists of grids, wherein the grids comprise transverse ribs, vertical ribs and inclined ribs, the vertical ribs and the transverse ribs are in vertical arrangement for forming square lattices, the inclined ribs are arranged along the diagonal lines of the square lattices, the transverse ribs are provided with notches for passing the vertical ribs, the upper edges and the lower edges of the vertical ribs are provided with grooves clamped with the notches of the transverse ribs, the vertical ribs pass through the notches of the transverse ribs and are rotated to a degree that the vertical ribs are vertical to the horizontal plane for completing the riveting, and finally, the joint seams and the inclined ribs are welded for forming the grids. The upper surfaces of the transverse ribs, the vertical ribs and the inclined ribs are also provided with rectangular tooth openings for increasing the friction force during vehicle passing. The grid steel bridge deck can be prefabricated in factories, and can realize the fast construction completion and the construction period reduction when being applied to the erection and the maintenance of highway bridges.

The invention discloses an urban bridge rapid demolition and reconstruction construction method based on a gantry crane, and belongs to the field of bridge engineering. The method comprises the steps that S1, an auxiliary road bridge is constructed, and traffic is guided and changed to the auxiliary road bridge; S2, a main bridge gantry crane is erected; S3, a bridge dismantling bracket is erected; S4, an arch rib support is erected; S5, an accessory structure and a bridge deck system of the old bridge are detached; S6, a rope saw is adopted for cutting the bridge flange plate and hoisting away the bridge flange plate; S7, after the suspender is dismantled, the suspender is transported out of the construction site; S8, arch ribs are cut and hoisted away in a segmented mode through a gantry crane; S9, the main beam is cut, decomposed and hoisted away in a segmented mode through a gantry crane; and S10, the old pier platform steel sheet pile cofferdam is constructed and decomposition and hoisting are performed on a lower structure; according to the rapid dismantling and reconstruction method, ecological dismantling of an old bridge and rapid erection of a new bridge are achieved through repeated utilization of the bridge dismantling gantry crane, the requirements of navigation limitation and environmental protection are met, and normal traffic of urban trunk traffic is guaranteed.

The invention discloses a pipeline structure and a rapid laying method for a single-layer vacuum pipeline or a double-layer vacuum pipeline of the pipeline structure. The pipeline structure comprises an inner layer spiral pipe, an outer layer spiral pipe, a high-strength rigid filler arranged between the inner layer spiral pipe and the outer layer spiral pipe in a filled mode and a tensioning piece for combining the inner layer spiral pipe with the rigid filler as well as the outer layer spiral pipe with the rigid filler into a whole. The tensioning piece is fastened with the inner layer spiral pipe and / or the outer layer spiral pipe, and the inner diameter of the inner layer spiral pipe is larger than or equal to 3 m and is smaller than or equal to 15 m. According to the pipeline structure designed by using the structure, the pipe diameter is large, the pipeline strength is high, the cost is low, and processing is convenient; and the two pipelines in the structure are superimposed up and down, and a temporary conveying track and a permanent conveying track are arranged so that rapid erection of the single-layer vacuum pipeline or the double-layer vacuum pipeline can be conveniently realized, and the structure is stable and reliable.

The invention discloses a method for cable hoisting construction of large-span suspension bridge stiffening beams. A suspension bridge is erected between a first bank and a second bank. The method comprises the steps that 1, a main cable saddle is arranged on a cable tower top cross beam; 2, concrete anchors are arranged on the first bank and the second bank; 3, the first bank and the second bankare each provided with two 30t lifting winches, two 30t traction winches and traction rotation wheels; 4, lifting devices are connected and comprise traveling crown blocks, upper hoisting devices andlower hoisting devices; and 5, traction cables and lifting cables are routed, each traction cable is arranged in a mode of number '4' and each lifting cable is arranged in a mode of number '8'. By improving the routing of a traction cable circulation system and a lifting cable circulation system, 220t hoisting capacity is met on the suspension bridge with the span length being 1400 meters, and safe construction is conducted.

The invention discloses a quick construction method for an over-crossing business line hangar tunnel T-shaped girder in narrow space. The quick construction method includes the following steps that ahangar tunnel foundation pit is dug according to a designed location and a hangar tunnel stand column is constructed; a hangar tunnel vertical girder is constructed, a bracket support is pre-buried and a gantry crane walking railway is set up on the bracket support; a distributive girder and a form board are laid on the top of the hangar tunnel vertical girder to be used as a T-shaped girder primary prefabricating platform, and a gantry crane is arranged on the gantry crane walking railway; a T-shaped girder is poured on the T-shaped girder primary prefabricating platform and hoisted to a vacant zone; if the vacant zone can not be laid fully, then the step is conducted repeatedly; the T-shaped girder primary prefabricating platform is demolished, and the form board is laid on the T-shapedgirder to be used as a T-shaped girder secondary prefabricating platform; a T-shaped girder is poured on the T-shaped girder secondary prefabricating platform and hoisted to a vacant zone and erectingof the T-shaped girder is completed; the T-shaped girder secondary prefabricating platform is demolished and auxiliary facilities are exerted; and other unnecessary facilities are demolished. The problem of insufficient prefabricating places can be solved and the risk of the hoisting operation near the business line is avoided.