98results about How to "Avoid construction risks" patented technology

The invention discloses a soft and weak wall rock tunnel advance reinforced support construction method. When a pipe roof advance support construction is carried out on one segment of the constructed tunnel, the construction method comprises the following steps: (1) support arch and guide pipe construction, wherein a plurality of guide tubes for carrying out guiding on a plurality of pipe roof pipes are arranged on a support arch; each pipe roof pipe comprises a pipe body and a drill bit; each pipe body is formed by splicing a plurality of pipe joints; each drill bit is coaxially arranged at the front end of the pipe body; the pipe joints are spiral steel pipes; the pipe roof pipes are first pipe roof pipes or second pipe roof pipes; and the first pipe roof pipes and the second pipe roof pipes are staggered; (2) drilling machine and slip casting machine installation and emplacement; (3) pipe roof advance support construction, which comprises the following processes: first pipe roof pipe drilling and synchronous grouting construction, final hole grouting construction of the first pipe roof pipes, second pipe roof pipe drilling and synchronous grouting construction and final hole grouting construction of the second pipe roof pipes. The method disclosed by the invention is simple in steps, reasonable in design, simple and convenient to construct and good in support effect; and the soft and weak wall rock tunnel advance reinforced support process can be simply, conveniently and quickly finished.

The invention discloses an auxiliary device for starting and receiving of a shield machine. The auxiliary device comprises a steel sleeve, a bottom framework, and a bearing board, wherein the steel sleeve is formed by connecting a plurality of sleeve bodies, the bottom framework is arranged at the bottom of the steel sleeve, the bottom framework comprises a plurality of sections, the bottom framework comprises a bottom board that extends along a direction vertical to an axis of the steel sleeve, the bearing board extends along the direction vertical to the axis of the steel sleeve and has a side edge matched with the outer side wall of the sleeve body, the bearing board is vertical to the bottom board, lifting boxes are arranged at two ends of the bottom board, the lifting boxes comprise an external box that is formed by connecting a top board parallel to the bottom board with a part of the bearing board and an internal box that is arranged in the external box, the internal box is internally provided with a hydraulic device, and a plurality of vertical and horizontal steel boards are arranged in a clearance between the internal box and the external box so as to divide the clearance into a mesh structure. The auxiliary device can be used for starting and receiving of the shield machine, also can realize cross-station, lifting and translation of the shield machine, is low in device loss and long in service life.

The invention discloses a shale gas well no-killing production tubular column capable of being lifted up and put down under no pressure and a construction method. The tubular column comprises a packer setting-releasing tubular column body and a tie-back completion tubular column body. The packer setting-releasing tubular column body comprises an up-down tool, a setting tool, a permanent type tube insert packer, a lower working cylinder, a centering guide, a cracking disc and a screen tube. An ejecting type check valve is arranged in the permanent type tube insert packer. The tie-back completion tubular column body comprises an underground hydraulic control safety valve, an upper working cylinder, a circulating slide sleeve, a centering guide and a sealed insert tube. The sealed insert tube is inserted in the packer and pushes open the ejecting type check valve to form a production channel. When needing to be taken out, the tie-back completion tubular column body is lifted up and rotates forwards, the sealed insert tube retreats out of the packer, and the ejecting type check valve is automatically closed. By arranging the ejecting type check valve in the permanent type tube insert packer, after a well shaft is packed by the packer, an upper well shaft is under no pressure; the tubular column can be lifted up and put down through a conventional workover rig, construction efficiency is improved, and under-pressure construction expanses are saved.

The invention discloses an underground diaphragm wall construction method based on a BIM technology, and the method comprises the steps: carrying out the three-dimensional modeling of an underground diaphragm wall design and construction drawing according to a project BIM application standard, and obtaining a project BIM model; based on the project BIM model, conducting collision and error inspection on underground diaphragm wall steel bars, fore shaft pipes and grouting pipes, and adjusting and optimizing the project BIM model according to the inspection result; performing three-dimensional simulation by using the project BIM model, and simulating a construction process; in the on-site construction process, conducting three-dimensional visual disclosure on on-site construction personnel according to the project BIM model; guiding field construction according to the project BIM model and the construction process simulation thereof; and after construction is completed, performing construction acceptance according to the project BIM model. By means of the construction method, the construction quality and precision of the underground diaphragm wall are improved, and the construction progress is accelerated.

The invention discloses an offshore wind electricity single pile-wing plate-rockfill composite foundation and a construction method thereof. The foundation comprises a single pile, a wing plate and rockfill, the wing plate is of a conical structure, and is welded to the outer wall of a pile body, the rockfill is formed through dense stacking of the rockfill, the upper end of the wing plate is located in the rockfill, and the lower end of a pile wing is located on a seabed supporting layer. The construction method of the offshore wind electricity single pile-wing plate-rockfill composite foundation comprises the following steps of S1, determining the sizes of the single pile, the wing plate and the rockfill; S2, driving the single pile with the wing plate by the designed anchorage depth; and S3, stacking the rockfill on a seabed nearby the single pile. The problems of the low single pile bearing force, the large pile wing of the wing plate pile, serious foundation washing and the like can be solved, the single pile, wing plate and rockfill combination structure uses pile periphery soil resistance and rockfill friction force, the pile foundation bearing force can be improved, the pile foundation horizontal displacement can be reduced, the wing plate size is reduced, a wing plate stress mechanism is changed, washing of waves and ocean currents to seabed soil can be blocked, and safe and stable running of an offshore wind generation set can be ensured.

The invention provides a shield tunneling machine cutter head with a mud cake detecting and removing device and a using method. The mud cake detecting and removing device on the cutter head comprisesa rotary spray head, a sleeve, a telescopic cylinder, an end cover, a temperature sensor, a thrust bearing, a sealing ring and a fastener. When the cutter head is provided with a mud cake, the mud cake area and an excavation face are continuously rubbed to enable the temperature of the cutter head to rise, the cutter head stops rotating when abnormal temperature rise is monitored through the temperature sensor, an electric valve is opened, and mud cake removing operation is conducted. According to the shield tunneling machine cutter head with the mud cake detecting and removing device and theusing method, an electromagnetic reversing valve connected with the mud cake detecting and removing device is adjusted to the left position, high-pressure water enters a rodless cavity, a cylinder barrel of the telescopic cylinder is pushed to extend outwards to penetrate into the mud cake, when a spray opening is exposed out of the sleeve, the high-pressure water flow pushes the rotary spray headto rotate, and muck around the spray head is removed; and after mud cake removing is completed, the reversing valve is adjusted to the right position, the high-pressure water enters a rod cavity of the telescopic cylinder to enable the cylinder barrel to retract into the sleeve, detecting and automatic rapid removing of the cutter head mud cake are achieved, the risk of under-pressure bin entering operation is avoided, and the efficiency and safety of shield construction are improved.

The invention discloses an advance support construction method for a high-strength pipe shed of a tunnel. A process for carrying out advance support construction on a pipe shed of one segment of a constructed tunnel comprises the following steps: (1) constructing support arches and guide pipes; (2) installing a drilling machine and a grouting machine in place; (3) carrying out advance support construction on the pipe shed: (301) preparing before drilling; (302) drilling pipe joints at front ends and synchronously grouting; (303) connecting the pipe joints; (304) continuously drilling and synchronously grouting; (305) repeating the steps (303) and (304) many times until the drilling processes of pipes of the current constructed pipe shed are finished; (306) blocking drill holes; (307) carrying out grouting construction on final holes; (308) repeating the steps (301) to (307) many times until all advance support construction processes of the pipes of the pipe shed are finished; and (4) carrying out excavation construction on the tunnel. The method disclosed by the invention is simple in step, reasonable in design, simple and convenient in construction and good in support effect; and by adopting automatic drilling type high-strength pipes of the pipe shed, the advance support process of the tunnel can be simply, conveniently and quickly finished.

The invention relates to the technical field of tunnel construction methods, in particular to a reinforcement method for passing through an existing building under a shield tunnel. Reinforcement pilesare added on both sides of the existing building in a transverse direction during construction, an anchor cable is arranged in a soil body between the existing building and the shield tunnel, and after the anchor cable is pulled to achieve design strength, both ends of the anchor cable are fixed to the reinforcement piles; then, slurry is poured into the soil body below the existing building, andthe poured slurry wraps the anchor cable to form a reinforced concrete structure bearing the existing building; after the poured slurry achieves the design strength, reinforcement of the existing building is completed. According to the method, a reinforcement structure is simple, pile foundations and internal structures of the existing building are completely avoided, damage caused to the existing building is avoided, the integrity and safety of the existing building are completely protected, and the method has a high popularization value.

The invention discloses an enclosed waterproof reinforced structure of an original plain wall of a shield and construction technology. The waterproof reinforced structure comprises underground continuous walls of C15 plain concrete (including pre-burying grouting pipes), two rows of rotary jet grouting pipes, three-axis mixing piles and many precipitation wells. The specification for the rotary jet grouting pipes is Phi800@500, and the specification for the three-axis mixing piles is Phi850@600. C15 plain underground continuous walls with embedding rocks of concave type are arranged on the periphery of the reinforced area, forming an enclosed waterproof curtain structure with underground continuous walls of station, then the sedimentation influencing ranges of the soil body outside the pits caused by precipitation inside the pits can be decreased and the effect of exclusion of water can be ensured effectively. Grouting pipes are pre-buried on both inner and outer sides of the underground continuous wall seams of the plain concrete, thereby achieving the operation of grouting and preventing leakage on the seams where leakage exists.

The invention provides an assembly-type deep and large round vertical shaft structure for a rock stratum area. The assembly-type deep and large round vertical shaft structure comprises fore shaft ringbeams arranged at the shaft mouth of a round vertical shaft, wherein the lower end of each fore shaft ring beam is provided with a first annular duct piece, a plurality of second vertical shaft sections are connected to the lower portion of the first vertical shaft section and are arranged in sequence from top to bottom, an inner ring of each fore shaft ring beam is provided with a joint part, and the first annular duct pieces are hung on the fore shaft ring beams through first upper connectors and joint parts. The round vertical shaft is a structure formed by assembling a plurality of annular duct pieces, the fore shaft ring beams are utilized for bearing, the joint parts, the first upper connectors, first lower connectors, second upper connectors and first lower connectors are adopted for connection, digging and assembly can be conducted simultaneously, the construction efficiency is effectively improved, preliminary bracing is reduced, the project period and project investment aresaved, and environmental pollution and construction risks brought by cast-in-situ concrete construction are avoided.

The invention discloses a fully-underground LNG storage tank with a top air inlet jacking device. The fully-underground LNG storage tank with the top air inlet jacking device comprises an LNG storagetank body. The dome center of the LNG storage tank body is provided with an air inlet. The dome is provided with a plurality of guide pulleys around the air inlet. Each guide pulley is provided with asteel wire rope in a supporting manner, wherein one end of the steel wire rope penetrates through the air inlet to be fixed to a bearing platform of the LNG storage tank body, the other end of the steel wire rope is connected with a winch through a guide sliding trolley arranged on the edge of the dome, the winch is fixed outside the LNG storage tank body. According to the fully-underground LNG storage tank with the top air inlet jacking device, the problem that the fully-underground LNG storage tank cannot achieve a manner that the bottom of the tank wall is opened to achieve air inlet jacking like a common overground tank is solved; the dome structure is integrally installed, and the construction risk caused by high altitude bulk hoisting can be avoided; a bottom air inlet is omitted, and the integrity of a concrete tank wall structure is ensured; and in the whole jacking operation process, the position of a dome frame can be monitored and adjusted in real time through a pulley block balance guide device and an upper balance drafting device, and precision and stability of the whole jacking process are ensured.

An installation method of a submarine pipeline buckling detector comprises the following installation steps that firstly, venting holes are formed in the buckling detector; secondly, the buckling detector is put into a submarine pipeline; thirdly, pipe openings of the submarine pipeline are sealed; fourthly, the submarine pipeline is filled with the compressed air, and the buckling detector forwards moves to the interior of the submarine pipeline; fifthly, a steel wire rope stops moving forwards; sixthly, air inflation of the submarine pipeline stops; seventhly, the fourth step to the sixth step are repeated until the buckling detector arrives at the set position of the interior of the submarine pipeline; eighthly, a steel wire rope with a copper pipe and the steel wire rope which enters the submarine pipeline are connected; and ninthly, the copper pipe is placed at the position of a welding point in the submarine pipeline. By the adoption of the installation method of the submarine pipeline buckling detector, the problem that weld seams at the welding points of the steel wire ropes and the submarine pipeline are adhesive is solved, movement of the buckling detector in the submarine pipeline can be smoother, and the detection speed is increased. In addition, the problem that nuts of connecting snap rings of the buckling detector are loosened and fall down is solved, and the probability of the phenomenon that the buckling detector falls in the submarine pipeline is reduced.

The invention provides a description method of the crack fracture scale based on seismic wave full-waveform characteristics. The description method of the crack fracture scale comprises the followingsteps: generating a composite seismic source time function through modeling of the crack fracture scale, obtaining a Green function from a seismic source to an observation station through logging and/or three-dimensional seismic data, obtaining a synthetic micro seismic wave according to the composite seismic source time function, the Green function and a seismic moment tensor, and obtaining a composite micro seismic wave; calculating correlation coefficients of the synthetic microseismic waves and the microseismic waves recorded by the observation station based on the full waveform characteristics of the seismic waves, and selecting the fracture fracture scale recorded by the synthetic microseismic waves with the correlation coefficients within a preset coefficient allowable range as thefracture scale. The invention has the beneficial effects that the problem that the fracture dimension of the crack cannot be quantitatively described in passive earthquake monitoring can be solved.

The invention provides a double-pipe cyclic heating wellhead four-way device. The double-pipe cyclic heating wellhead four-way device comprises an outer pipe and an inner pipe, wherein the outer pipe sleeves the inner pipe in a fixed manner; an annular space is formed between the inner pipe and the outer pipe; a water inlet bypass and a water outlet bypass communicated with the annular space are arranged on the pipe wall of the outer pipe; the water inlet bypass is located above the water outlet bypass; a filtering assembly is arranged in the outer pipe and at the upper end of the inner pipe; the filtering assembly comprises a shell with a water filtering cavity and a filter element arranged in the water filtering cavity; a water inlet hole and a water outlet hole are formed in the shell; the water inlet hole is communicated with the water inlet bypass; the water outlet hole is communicated with the upper end opening of the inner pipe; and a liquid circulating channel is formed by sequentially making the water inlet bypass, the filtering assembly, an inner cavity of the inner pipe, the annular space and the water outlet bypass communicated. The double-pipe cyclic heating wellhead four-way device can be used for filtering water and the liquid circulating channel is prevented from being blocked.

The invention discloses an inverse construction method for a pipe-jacking working well. The construction method comprises the following steps that the round working well is dug; a three-axis cement stirring column water-stopping curtain is adopted to form an enclosure structure; a pile top ring beam is manufactured on an enclosure pile through the working well, the self weight of the working wellstructure is borne by utilizing the ring beam, the self weight of the working well is guaranteed, the construction is constructed in a node-by-section mode, and a reinforced concrete lining is manufactured along with excavation; and the arch formed by the self structure serves as a horizontal support, the lateral soil pressure is resisted, and the safety of the well pit is guaranteed. The workingwell is constructed through the construction method, a foundation pit support can be carried out by utilizing the structure of the working well, so that the construction safety of a foundation pit isguaranteed; meanwhile, the engineering quantity of the foundation pit is reduced, the foundation pit enclosure pile and the support are reduced, and a structure construction scaffold is reduced by means of the reverse construction, the construction height is reduced, and the construction risk is avoided; and meanwhile, the workload of template turnover materials is reduced, the construction process is simplified, the construction period is shortened, and the influence on the adjacent building (structure) and the road and surrounding environment is reduced.

The invention discloses a fastening belt assembly and method for mounting and dismounting a wind turbine generator turbulent flow strip. The fastening belt assembly comprises two fastening belts, a fastener, a hook and loop fastener, a mooring rope and a binding belt. The binding belt and the hook and loop fastener are utilized for attaching and fixing the two fastening belts, and therefore the whole fastening belt assembly is stably connected, external force can be applied through the mooring rope to flexibly dismount the fastening belt assembly, and the manufacturing technology of the fastening belt assembly is simple and convenient. The method for mounting and dismounting the wind turbine generator turbulent flow strip specifically comprises the steps that the fastening belt assembly mounted on a wind turbine generator high tower barrel is utilized as a carrier, the turbulent flow strip is mounted on the fastening belt assembly, and mounting of the turbulent flow strip on a wind turbine generator can be achieved; and in the later period, the fastening belt assembly can be separated from the tower barrel only by pulling the mooring rope on the ground, manual dismounting of the turbulent flow strip can be achieved without other auxiliary hoisting, the beneficial effect of convenient dismounting and mounting is achieved, the dismounting cost of the turbulent flow strip is reduced, certain construction risks are avoided, and safety and reliability are achieved.

The invention belongs to the protection technology of blasting engineering and provides a detonator cover structure for limiting fragment scattering in the detonator detonating process. The detonator cover structure is formed by combining steel plates with different shapes; the detonator cover structure is formed by welding a semicircular tube body (2) and two semicircular steel plates (1), the semicircular tube body (2) is processed by a steel plate with a certain length, the semicircular steel plates (1) are symmetrically arranged at two end surfaces of the semicircular tube body (2), and the cover type structure with the semicircular cross section shape and the semi-annular steel plates at two ends for sealing is formed; and the radiuses of semicircular open holes arranged at two end surfaces of the cover structure are smaller than the radius of the semicircular tube body (2). The detonator cover structure has the advantages that the hidden danger of detonator blasting propagation failure caused by nearby detonator cut by scattered fragments after the detonator blasting in the detonator group connecting detonating structure is avoided, the blasting success rate is improved, and the construction risk of blind gun generation is avoided.

The invention discloses a shield reinforcing construction process. A shield lanuching reinforcing soil body and a receiving reinforcing soil body are each divided into a first area soil body and a second area soil body along a shield excavation path, and the shield reinforcing construction process comprises the following steps that S1, reinforcing the first area soil bodies by adopting a high-pressure jet grouting pile and/or a three-axis mixing pile, and constructing the second area soil bodies by adopting a freezing method; and S2, performing freezing method construction on the outer ring ofa shield tunnel entrance door or a shield tunnel exit door in a lanuching well or a receiving well, and arranging freezing pipes in a circle shape, wherein the diameter of the circle is larger than that of the shield tunnel entrance door and that of the shield tunnel exit door. The shield reinforcing construction process can be applied to the situation that the surrounding environment is complexin the urban rail transit construction process, and a cutterhead can be effectively prevented from being frozen.

The invention discloses a precipitation inclined shaft in a deep foundation pit and a construction method of the precipitation inclined shaft. A shaft pipe is arranged in the precipitation inclined shaft, a filling layer is arranged between the outer wall of the shaft pipe and the inner wall of the precipitation inclined shaft, the middle-lower section of the filling layer is a filter section, andthe upper section of the filling layer is a sealing section; the bottom end of the shaft pipe is closed, an opening is formed in the shaft wall of the shaft pipe of the filter section, and a 60-meshor 80-mesh filter screen is wound outside the shaft pipe; the filter section is filled with gravel with the particle size of 3-7 mm; the sealing section is filled with clay, and the filling degree isnot lower than 90%; centering supporting legs in three directions are arranged on the lower section, the middle section and the upper section of the shaft pipe in the circumferential direction, the interval between every two centering supporting legs is 120 degrees, a centering support is fixed to the outer wall of the shaft pipe wound with the filter screen through screws, and one supporting legfaces the position over the other supporting leg; and the included angle between the precipitation inclined shaft and the vertical direction is 30-70 degrees. The precipitation inclined shaft and theconstruction method thereof have the beneficial effects that the lower space around the foundation pit is fully utilized, the problem that the ground surface construction space is insufficient is thoroughly solved, and the construction risk of damaging underground facilities such as pipelines and structures is avoided; and the safety and the stability of foundation pit engineering are effectivelyimproved.

A bridge stand column support-free construction method comprises the steps: processing of a stand column reinforcement cage: the stand column reinforcement cage is machined through a reinforcement cage jig frame; measuring the pre-embedded position of the stand column: lofting the direction line of the outer side line of the stand column onto a bearing platform template, and pulling out the central outline of the stand column by using a fine line to serve as a reference line of a stand column pre-embedded reinforcement cage; and integrally hoisting the stand column reinforcement cage: inserting the reinforcement cage into the bearing platform and not installing opposite-pull hook ribs and inner stirrups of the part above the bearing platform surface, binding the part of steel bars insertedinto the bearing platform after the stand column reinforcement cage is hoisted in place and fixed, and mounting the opposite-pull hook ribs and the inner stirrups within the range of the part above the bearing platform surface after a concrete surface is roughened and cleaned. Compared with the prior art, centralized modular machining, manufacturing and mounting of steel bars are achieved, the reinforcing steel bar machining jig frame and the reinforcing steel bar end positioning frame are used for machining the bridge stand column reinforcing cage in a workshop, and the reinforcing steel barpositioning precision and machining efficiency are improved; and traditional scaffold erecting and formwork erecting procedures are combined, and scaffold-formwork integration is adopted.