76results about "Gaskets" patented technology

The invention belongs to the technical field of water conservancy projects and pumped storage projects, and discloses a layered injection construction method of a micro-stress ECC parting-free hydraulic anti-seepage panel. Aiming at anti-cracking and anti-seepage challenges of a large-scale seamless hydraulic panel, micro-stress high-ductility injection ECC is injected for multiple times in the thickness direction of the micro-stress ECC parting-free hydraulic panel to form a multi-layer composite integral panel, and transverse and longitudinal joints are not arranged; construction cold joints existing in each spraying layer are covered by the subsequent spraying layers, and the construction cold joints of the adjacent spraying layers do not coincide; and the integral micro-stress ECC joint-free hydraulic panel structure is formed by staggering and overlapping. And by means of the crack control design of staggered joint lap joint and twisting-capturing of the ECC layer face, cooperative improvement of structural bearing and crack resistance and seepage resistance is achieved. Compared with a traditional steel-concrete panel and a traditional asphalt concrete panel, the concrete panel has the advantages of being rigid and flexible, high in construction speed, economical, practical, high in deformation adaptability, resistant to void, resistant to freezing, durable and the like, and the problem that a traditional hydraulic panel gives consideration to crack resistance, seepage resistance and safe service is solved.

The invention discloses a soft clay electrochemical reinforcing device and method. The device comprises a power source, an anode, a cathode and a middle grouting pipe. A cation exchange membrane is arranged in the area, close to the cathode, of the to-be-reinforced soil body, only allows cations to migrate from the interior of the soil body to the cathode, and physically prevents anions generated by the cathode electrolytic reaction from reversely diffusing to the soil body; and the cation exchange membrane wraps the outer surface of the cathode or is arranged in the soil body around the cathode as an independent interlayer to form an ion filtering interface completely surrounding the cathode. According to the method, a selectively permeable cation exchange membrane is arranged at the interface of a cathode and a soil body, and a step-by-step grouting process of first anode grouting and then middle grouting pipe grouting is combined, so that the displacement of unit energy consumption is remarkably improved under the same voltage, the settlement amount of the soil body in a cathode area is increased by nearly 4 times, and the construction efficiency is improved. The engineering problem that an anode is hard and a cathode is soft in traditional electroosmosis is solved.

The invention relates to the technical field of gas film preparation, in particular to an environment-friendly gas film for foundation pit construction and a preparation method of the environment-friendly gas film. Determining a gas film cutting treatment mode according to the edge damaged length of the test gas film; determining a cutting parameter adjustment mode according to the edge damaged length and the number of edge damaged sections in the sections corresponding to the edge damaged length; carrying out secondary test cutting on the test gas film; if the edge damaged length meets the requirement and the number of the edge damaged sections does not meet the requirement, the number of the joints is adjusted, and if the edge damaged length does not meet the requirement, the steps are repeated till the edge damaged length of the gas film meets the requirement; cutting the gas film to obtain gas film fragments; and carrying out heat sealing on the gas film fragments to obtain a finished gas film. The bearing capacity and the stability of the gas film are improved.

The invention discloses a composite temperature-control drainage geotextile, and relates to the technical field of geosynthetic materials. The geotextile comprises a drainage layer which is of a three-dimensional water guide structure formed by biaxial warp knitting of special-shaped section wicking fiber bundles and polypropylene reinforced fiber bundles and used for efficient drainage; the reinforcing layer is of a grid structure which is formed by hot melting and bonding ultra-high molecular weight polyethylene fibers and has high tensile strength, and provides mechanical support; the heating layer is composed of carbon fiber heating wires which are arranged in parallel in a snakelike mode and electrically connected in series, and the heating layer is embedded in a quilting seam channel between the drainage layer and the reinforcing layer and can achieve active heating of soil; the temperature control module comprises a temperature sensor in the enhancement layer and a temperature control device connected with the heating layer in series, and the heating power can be dynamically adjusted according to a preset temperature threshold value. By means of the multi-layer composite structure and the intelligent temperature control system, effective integration of drainage, enhancement and active anti-freezing functions is achieved, and the engineering application performance of the geotechnical cloth in the cold environment is remarkably improved.

The whole reservoir anti-seepage reservoir of the pumped storage power station comprises a seepage control structure, a drainage collection system and a seepage monitoring system, the seepage control structure comprises a reservoir bottom seepage control structure and a reservoir bank seepage control structure, and the reservoir bottom seepage control structure comprises a geomembrane, a broken stone hardcore, a reservoir bottom transition layer, a geotechnical mat and geotechnical cloth; the reservoir bank seepage control structure comprises a geomembrane, a reservoir bank cushion layer, high-strength woven geotechnical cloth and a wave wall. On the basis of the characteristics of deformation and the like of different areas of the reservoir basin, adaptive seepage control types are designed and combined to form a complete full-reservoir-basin seepage control structure, seepage pressure value information of monitoring points is collected in real time through the seepage monitoring system, and the seepage pressure value information of the monitoring points is acquired in real time. And a leakage point position judgment method is provided to determine a local leakage point area.

The invention provides a truss type method for cooperatively repairing a concrete lining panel through multiple actuators. The method comprises the following steps that S1, the lining panel to be repaired is cut and separated; s2, the separated lining panel is removed; s3, state detection is conducted on the groove bottom surface of the backfilling groove; and S4, the new lining panel is embedded into the backfill groove. Through the combined design of the truss, the movable cross beam and the adjusting mechanism, the construction range and the operation position can be flexibly adjusted according to the actual situation on site, the problem that in traditional cofferdam construction, due to the fact that a cofferdam body is designed in advance, the time window and the space range are limited is solved, the effects of flexible construction and limitation reduction are achieved, and the construction efficiency is improved. And a complex cofferdam structure does not need to be constructed, so that the influence on the water delivery capacity of the channel in the cofferdam construction process is avoided, meanwhile, the workload of constructing and dismantling the cofferdam is reduced, and the engineering complexity and cost are remarkably reduced.

The invention discloses a quick plugging method for a pile foundation karst cave, and belongs to the technical field of pile foundation construction in geotechnical engineering. The method aims at solving the technical problems that when pile foundation drilling in the karst area meets cracks or karst caves, mud leaks, and a traditional method is high in cost and low in efficiency, and a rapid and efficient leaking stoppage scheme is provided. The method is characterized in that a sulphoaluminate quick-hardening cement blanket is bonded end to end on the ground through hook-and-loop fasteners, and a sleeve structure wrapping an annular hydraulic water bag is prefabricated; the pre-assembly body is integrally put down to a leakage channel in the pile hole; the water bag is filled with water to expand in the radial direction, the hook-and-loop fasteners are opened, and the cement blanket is pressed on the side wall of the pile hole instantly to cover the leakage channel. The water bag support is maintained until the cement blanket is solidified to form a protection wall. According to the method, detection, prefabrication and overall construction are integrated, accurate in-place and rapid curing of the leaking stoppage material are achieved, the construction efficiency, the success rate and the reliability are remarkably improved, and the treatment cost is greatly reduced.

The invention relates to the technical field of waterproof coiled materials, and provides a double-channel prefabricated occlusion lap joint waterproof coiled material and a preparation method thereof. The invention relates to a double-channel prefabricated occlusion lap joint waterproof coiled material, which sequentially comprises an anti-sticking and visbreaking layer, a macromolecular permeable reaction adhesive layer 1, a macromolecular sheet material layer 1, a macromolecular sheet material layer 2 and a macromolecular fiber reinforced cloth reinforcing layer from top to bottom, and waterproof structure female ports are arranged at the same ends of the macromolecular sheet material layer 1 and the macromolecular sheet material layer 2; an isolating membrane 1 is arranged on the upper surface of one end, far away from the waterproof structure female opening, of the macromolecular permeable reaction adhesive layer 1, a macromolecular permeable reaction adhesive layer 2 is arranged on the lower surface of one end, far away from the waterproof structure female opening, of the macromolecular sheet layer 2, and an isolating membrane 2 is arranged on the lower surface of the macromolecular permeable reaction adhesive layer 2. According to the technical scheme, the problems of high construction difficulty and poor waterproof performance of the waterproof roll in the prior art are solved.

This invention relates to the field of engineering foundation construction, specifically disclosing a method for removing fine particles from dredged sandy soil foundations. The method includes a pipeline, an upper rod, a suction pipe, and a cone. The upper rod contains a high-pressure water pipe, a high-pressure air pipe, and a suction pipe, all connected to the pipeline. The suction pipe, from the outside in, consists of an outer shell, a filter screen, and a suction chamber. The outer shell has several suction holes and several high-pressure air jet holes, connected to the high-pressure air pipe, and the suction chamber is connected to the suction pipe. The cone's tip has a high-pressure water jet hole connected to the high-pressure water pipe. Several vibrating rods are fixedly installed within the upper rod and suction pipe. This invention's fine particle removal equipment penetrates deep into the soil layer and removes fine particles through suction and filtration. It has a simple structure, is easy to implement, has low construction costs, and is convenient to operate. It can effectively remove fine particles from dredged sandy soil foundations, greatly reducing the difficulty of dredged sandy soil foundation treatment construction.

This application provides a multi-level collaborative reinforcement method and structural system for the disturbed zone of collapsible loess foundation. The method includes: removing loose soil from the disturbed zone; setting up an anti-seepage wall at the edge of the disturbed zone; backfilling the disturbed zone with reinforcing material and compacting it in layers to form a foundation replacement reinforcement layer; excavating a single-foundation pit on top of the foundation replacement reinforcement layer; laying buffer material at the bottom of the single-foundation pit; laying a single-foundation steel reinforcement cage in the single-foundation pit and anchoring the single-foundation steel reinforcement cage to the reserved steel bars on the existing retaining wall; and pouring concrete into the single-foundation pit to form a single foundation. The anti-seepage wall, in conjunction with the foundation replacement reinforcement layer, forms an anti-seepage and drainage system, achieving the effect of blocking capillary water rise from the source and ensuring smooth drainage, thereby eliminating the risk of collapsible loess collapsing when exposed to water. The foundation replacement reinforcement layer adopts a replacement process of layered backfilling and alternating compaction, achieving the effect of a high-bearing-capacity, low-compressibility foundation reinforcement layer.

The invention discloses a residue soil absorption field drainage system with multiple drainage paths, and relates to the technical field of dam body internal drainage systems, the residue soil absorption field drainage system comprises a blind ditch and a plurality of horizontal pipes, the blind ditch and the plurality of horizontal pipes are connected through a connecting well, and the upper half part of each horizontal pipe is provided with a plurality of water through holes; culvert pipes are arranged in the blind ditches, the culvert pipes are horizontally buried in the drainage foundation pit, a plurality of baffles inclining upwards are arranged on the lower half portions of the culvert pipes, drainage holes are formed in the positions, above the roots of the baffles, of the culvert pipes, and a plurality of overflow holes are formed in the upper half portions of the culvert pipes; drain valves are arranged on the two sides, above the culvert pipe connecting position, of the connecting well, and the drain valves are aligned with the drainage foundation pit. The drainage path is optimized, breathing balance is formed, and the drainage efficiency is remarkably improved. And the adaptability and reliability of the system are enhanced. Excessive accumulated water in the dam body is effectively prevented, the infiltration line is reduced, and long-term stable operation of the dam body under complex working conditions is guaranteed.

The present invention relates to the technical field of waterproofing membranes, and proposes a double-track prefabricated interlocking lap-jointed waterproofing membrane and a preparation method thereof. The double-track prefabricated interlocking lap-jointed waterproofing membrane comprises, from top to bottom, an anti-adhesion and viscosity-reducing layer, a polymer permeable reaction adhesive layer 1, a polymer sheet layer 1, a polymer sheet layer 2, and a polymer fiber-reinforced cloth reinforcement layer. The polymer sheet layer 1 and the polymer sheet layer 2 are provided with a waterproofing structural mother port at the same end. An isolation membrane 1 is provided on the upper surface of the end of the polymer permeable reaction adhesive layer 1 away from the waterproofing structural mother port. A polymer permeable reaction adhesive layer 2 is provided on the lower surface of the end of the polymer sheet layer 2 away from the waterproofing structural mother port. An isolation membrane 2 is provided on the lower surface of the polymer permeable reaction adhesive layer 2. The above technical solution solves the problems of difficult construction and poor waterproofing performance of waterproofing membranes in related technologies.

The invention provides a multi-level collaborative reinforcement method and structure system for a collapsible loess foundation disturbance area. The method comprises the steps that loose soil in the disturbance area is removed; an anti-seepage wall is arranged on the edge of the disturbance area; reinforcing material backfilling and layered tamping are conducted in the disturbance area, and a foundation replacement reinforcing layer is formed; single-foundation foundation pit excavation is conducted on the top of the foundation replacement strengthening layer; a buffer material is laid at the bottom of the single-foundation foundation pit; a single-foundation reinforcement cage is laid in the single-foundation foundation pit, and the single-foundation reinforcement cage and the reserved reinforcements on the existing retaining wall are mutually anchored; and the single-foundation foundation pit is poured through concrete, and a single foundation is formed. An anti-seepage drainage system is formed by matching the anti-seepage wall with the foundation replacement strengthening layer, and the effects of preventing capillary water from rising from the source and guaranteeing smooth drainage are achieved, so that the risk that collapsible loess disintegrates when encountering water is eradicated; the replacement technology of layered backfilling and alternate tamping is adopted for the foundation replacement strengthening layer, and the effect of the high-bearing-capacity and low-compressibility foundation strengthening layer is achieved.

The invention relates to the technical field of retaining wall drainage, and discloses a retaining wall integrated type double-layer water filtering layer drainage pipe which comprises a ribbon, a filtering mechanism is arranged on the inner side of the ribbon, a first fixing mechanism is arranged on the periphery of the left end of the filtering mechanism, and a second fixing mechanism is arranged on the periphery of the right end of the filtering mechanism. The filter mechanism comprises a first non-woven geotextile, the first non-woven geotextile is arranged on the inner side of the ribbon, an outer floral tube is wound on the inner side of the first non-woven geotextile, an inner floral tube is slidably connected to the inner side of the outer floral tube, and a water filter bag is slidably connected to the left side of the inner floral tube. When drainage work needs to be conducted on the retaining wall, firstly, medium-coarse sand, pisolite and gravel are sequentially filled in the water filtering bag according to the proportion of 1 / 3, after filling is completed, the left side of the water filtering bag is sealed through a sealing plug, meanwhile, second non-woven geotechnical cloth is wound around the periphery of the water filtering bag, and then the finished water filtering bag is slowly placed in a drill hole.

A non-corrosive form setting stake and a permanent leak-proof plugging method of using the stake in cases where soil conditions are such that a vapor barrier is required to prevent potentially harmful elements in the soil from escaping and harming anything or anyone above the barrier. The stake comprises a slender elongated body, a wedge-shaped leading end for piercing the earth, a plurality of holes through which nails are driven to attach the form board to the stake, and a trailing end that serves as a striking surface for driving the stake into the ground. In the forming of a slab on grade foundation, a plurality of stakes is driven through the vapor barrier and into the earth in order to hold the form boards in place. Next, a seal is created around the stakes to the vapor barrier. Once the stakes are sealed, each stake acts as a permanent leak-proof plug in the vapor barrier that prevents elements in the soil from escaping through or around the stake. After governing agencies have inspected the vapor barrier and the forms are removed, a top section of the stake is cut off above the stake's sealed portion and below the slab's finished surface. The concrete is then finished with the lower portion of each stake left permanently embedded in the earth and beneath the finished concrete.

The invention discloses a fiber modified asphalt anti-seepage coiled material and a preparation method and application thereof, and belongs to the technical field of anti-seepage coiled materials, the fiber modified asphalt anti-seepage coiled material comprises a base and an anti-seepage layer arranged on the base; the impermeable layer comprises the following raw materials in percentage by mass: 5%-20% of fibers, 10%-60% of coal gangue, 10%-60% of fly ash, 10%-60% of coal liquefaction residues, 10%-40% of petroleum asphalt, 0%-20% of lubricating oil, 3%-10% of rubber powder, 10%-30% of talcum powder and 3%-10% of a polymer modifier; the mass C of the coal liquefaction residues, the mass P of the petroleum asphalt and the mass M of the macromolecular modifier meet the following conditions: 1 < = C / P < = 3, and 0.25 < = M / C < = 0.5. According to the invention, the industrial solid waste is combined with the high-performance fiber, so that the key technical bottlenecks, including crack resistance, impermeability, low-temperature adaptability, corrosion resistance and resource utilization rate, of the impermeable material of the landfill are solved.

This invention discloses a combined energy-saving treatment method for soft soil foundations, creatively integrating air lift and a circulating on-off pump into traditional vacuum preloading. Air lift periodically clears water from the core of the drainage board, ensuring the vacuum load is transmitted along the drainage board without attenuation. The circulating on-off pump causes periodic changes in vacuum level, alleviating clogging and significantly saving energy in the early stages of vacuum preloading. By rationally combining the air lift cycle and the on-off pump cycle, the consolidation pressure is increased and the energy-saving effect is maximized. This invention employs a combined air lift and circulating vacuum loading method for efficient and energy-saving consolidation treatment of soft soil, with broad application prospects and significant social benefits. As a novel energy-saving soft soil consolidation method, it is of great significance for promoting carbon neutrality.

A wind turbine foundation structure comprising a hollow structural element with a circumferential wall extending in the longitudinal direction. A first cable feed-through breaking through the wall is arranged in the wall. A transition piece with an overlap region projects into the hollow structural element and a transition region projects out of the hollow structural element at the end face. A circumferential wall extends in the longitudinal direction. A second cable feed-through which breaks through the wall is arranged in the overlap region in the wall. The first and the second cable feed-through bear against one another in an at least partially overlapping manner in the assembled state of the hollow structural element and the transition piece.

The invention relates to the technical field of waterproof coiled materials, in particular to a modified asphalt waterproof coiled material and a preparation method thereof. The waterproof coiled material prepared by the invention overcomes the problems of insufficient mechanical properties and poor adhesive force of asphalt coiled materials in the prior art. The modified asphalt waterproof coiled material is prepared by pre-soaking and rolling a composite matrix obtained by mixing and rolling the modified glass fiber and the matrix in the modified asphalt, and drying and curing. The use amount of diisocyanate and hydroxyl-terminated polydimethylsiloxane is controlled, so that the high-temperature resistance and low-temperature resistance of the waterproof coiled material are improved; the use amount of modified polyurethane is controlled, so that the mechanical property of the coiled material is improved; by changing the use amount of the modified asphalt and the composite base, the peel strength of the coiled material is improved, and the adhesive force of the coiled material is improved.

The present invention relates to the technical field of air film preparation, and in particular to an environmentally friendly air film for foundation pit construction and a preparation method thereof, the method comprising: performing a test cutting of a test air film; determining an air film cutting processing method based on the edge damage length of the test air film; determining a cutting parameter adjustment method based on the edge damage length and the number of edge damage sections in a section corresponding to the edge damage length; performing a second test cutting of the test air film; if the edge damage length meets the requirements and the number of edge damage sections does not meet the requirements, adjusting the number of seams; if the edge damage length does not meet the requirements, repeating the above steps until the edge damage length of the air film meets the requirements; cutting the air film to obtain air film slices; and heat-sealing the air film slices to obtain a finished air film. The present invention improves the load-bearing capacity and stability of the air film.

The invention discloses a multi-section locking device and assembling, mounting and later film discharging processes thereof, and belongs to the field of engineering, the multi-section locking device comprises a locking assembly, the locking assembly comprises an upper locking pipe and a lower locking pipe, the upper locking pipe and the lower locking pipe are prefabricated and machined in advance, the upper locking pipe can be machined according to the field grooving depth, and the lower locking pipe can be machined according to the field grooving depth. The caliber of the top of the lower locking opening pipe is smaller than that of the bottom of the upper locking opening pipe, the lower locking opening pipe can be inserted into the upper locking opening pipe, a plurality of sets of bolt holes a are formed in the upper locking opening pipe at equal intervals, and bolts can be inserted into the corresponding bolt holes a in a penetrating mode. According to the multi-section locking device and the assembling, mounting and later-stage membrane feeding process thereof, the engineering field of underground vertical flexible diaphragm walls can be met, and the multi-section locking device has wide application prospects in the environment field such as vertical blocking of pollutants, temporary risk control of risks, vertical blocking of garbage stacks, seepage prevention of cement earth dams and the like.

The invention discloses a closed backfilling method for a basement side wall post-cast strip with an embedded steel plate serving as a waterproof base layer, and belongs to the technical field of underground structure waterproof construction. The structure comprises a full-length galvanized steel plate pre-buried on the outer side of the upstream face of the post-cast strip, studs are anchored to side wall steel bars, and the steel plate is in lap joint and full welding and is provided with an anti-rust and polymer emulsion waterproof coating; the waterproof coiled material is directly and continuously paved on the outer surface of the steel plate and crosses the post-cast strip; fertilizer groove backfilling is immediately implemented after waterproof acceptance check, and waiting for secondary pouring of the post-pouring belt is not needed. During construction, steel plate fixing, corrosion prevention welding, side wall concrete pouring, coiled material continuous paving and pasting and layered backfilling are conducted firstly. According to the method, a traditional brick blank film and secondary cleaning are omitted, the three functions of soil retaining, water insulation and a waterproof base layer are integrated, backfilling can be conducted in advance, the construction period is shortened, the leakage risk is reduced, and the method is suitable for the deep foundation pit basement outer wall post-cast strip position.

The invention discloses a reinforcement and protection device for slope construction, which relates to the technical field of slope protection; it comprises a protection mounting part, on which a hollow earth retaining part is mounted, and the hollow earth retaining part is used to reduce soil and water loss; an anchoring safety part is mounted on the protection mounting part; the anchoring safety part is used to prevent the anchoring position from being forgotten; an anchoring connector is mounted on the protection mounting part; the anchoring connector is used to anchor the protection mounting part; and a separation inspection part is mounted on the protection mounting part; the invention solves the problems that the current reinforcement and protection geobags used for slope construction are not convenient for batch soil addition and protection, not convenient for automatic soil loss monitoring, and not convenient for automatic prevention of forgotten joint anchoring; the use of the protection mounting part makes it convenient for workers to add soil to a row of protection mounting parts at the top of the slope at the same time after assembly, which can facilitate the workers to add soil with less effort.

This invention relates to the field of composite material technology and discloses a high-performance sealing material and its application in preventing leakage. The sealing material includes a base plate material and a dust-adhesive plate material. The base plate material includes a polyester elastomer and a modified inorganic filler. The dust-adhesive plate material includes a TPU polyether elastomer, a flame retardant, and a vulcanizing agent. By grafting an organophosphorus flame retardant onto the surface of attapulgite clay and then using it as an inorganic filler in the preparation of the base plate material, the sealing material possesses excellent acid and alkali resistance and flame retardant properties, preventing chemical leakage and effectively reducing the possibility of safety accidents and environmental pollution in chemical enterprises, thereby further improving the safety production level of chemical enterprises.

The application belongs to the field of building construction and is a waterproof structure and construction method for the joint of a basement foundation slab and an outer wall. A brick membrane is arranged on the edge of the foundation slab, SBS modified asphalt waterproof coiled material is laid on the edge of the foundation slab, HDPE pre-laid reverse-sticking waterproof coiled material is laid on the foundation slab, a concrete cushion layer is poured on the HDPE pre-laid reverse-sticking waterproof coiled material, the HDPE pre-laid reverse-sticking waterproof coiled material is continuously laid on the outer side of the outer wall by being bent, the HDPE pre-laid reverse-sticking waterproof coiled material is tightly attached to the outer side of the outer wall by a plurality of fastening assemblies, a first mortar protective layer and a high-viscosity asphalt anti-skid coating layer are arranged, the SBS modified asphalt waterproof coiled material is continuously laid on the high-viscosity asphalt anti-skid coating layer by being bent, and a second mortar protective layer is poured between the brick membrane and the outer wall. The vertical laying firmness and waterproof effect of the HDPE pre-laid reverse-sticking waterproof coiled material on the outer side of the outer wall are ensured, and the construction quality of the joint of the foundation slab and the outer wall with different waterproof materials is ensured.

This invention discloses a dehumidifying garage floor structure, comprising a base layer laid on the garage foundation surface. The base layer has a waterproof membrane layer, a sand and gravel drainage layer, an isolation layer, and a floor body laid sequentially on its upper surface. Drainage channels are provided between both sides of the floor body and the garage side walls. The floor body is a hollow structure, and a wheel locator is provided on its upper surface. The wheel locator has mounting holes on its surface, and movable push blocks are slidably connected to the inner walls of the mounting holes. This dehumidifying garage floor structure, by designing the garage floor as an internally hollow structure, can block moisture from the ground through its bidirectional structure. Furthermore, by providing the sand and gravel drainage layer and the isolation layer between the floor body and the ground, it can isolate and block underground water seepage, thereby improving the isolation and moisture-proof effect of the garage floor.

The present application relates to cofferdam structure technical field, especially relates to a kind of lock mouth steel pipe pile cofferdam structure and its construction method;Including pile body and I-beam, and the lower end of pile body is equipped with drill tooth;Two C-shaped tubes are provided in the inner cavity of pile body, the opening of C-shaped tube is opposite and penetrates the lateral wall of pile body, and the two wings of I-beam are inserted into adjacent two C-shaped tubes, and sealing mechanism is provided in C-shaped tube;The present application is connected by integrated C-shaped tube-I-beam rigid plug-in connection and built-in resettable sealing drive mechanism, systematically solves the series of problems in pile sinking interference, connection stiffness and component recovery of traditional process, and compatible static pressure pile planting construction, avoids vibration and soil squeezing effect;Its rigid interlocking connection provides bending stiffness much higher than prior art;Its reversible mechanical design provides fundamental guarantee for realizing nondestructive dismantling and reuse.

An inflatable active packer includes: an inner steel pile; and a sleeve coaxially disposed outside the inner steel pile. The inner diameter of the sleeve is larger than the outer diameter of the inner steel pile. The length of the sleeve is less than or equal to the length of the inner steel pile. The sleeve includes an inner wall, and one end of the inner wall is provided with a guide lug. A strengthened clamping layer is attached to the inner wall of the sleeve. A rubber capsule is fixedly disposed in the middle of the strengthened clamping layer; two ends of the strengthened clamping layer are fixedly connected to the sleeve through a compression member. A mounting hole is disposed in the middle of the strengthened clamping layer. The sleeve includes a through hole coaxially with the mounting hole.

The present invention provides a construction system applicable to the construction of vertical HDPE membranes, characterized in that: it includes a zipper-type lapping device applicable to the construction of vertical HDPE membranes, and a zipper-type membrane; wherein, the zipper-type lapping device applicable to the construction of vertical HDPE membranes includes a first lapping device and a second lapping device; the first lapping device has a first heating and welding sheet mechanism, a first connection mechanism and a first conveying mechanism; the second lapping device has a second heating and welding sheet mechanism, a second connection mechanism and a second conveying mechanism; the first conveying mechanism and the second conveying mechanism are respectively located on the upper and lower sides of the zipper-type membrane; the zipper-type membrane includes a first zipper-type membrane and a second zipper-type membrane; the first zipper-type membrane and the second zipper-type membrane are detachably arranged in pairs between the first lapping device and the second lapping device; the opposing positions of the first zipper-type membrane and the second zipper-type membrane have mutually matching structures. This system can achieve a fast and convenient method for lapping membranes and membranes.

The application discloses a kind of construction joint anti-seepage structure of foundation pit basement outer wall and its construction method, comprising: lower outer wall, the inner edge of the top surface of lower outer wall is formed with reverse ridge;First grouting pipe, is buried in the middle of the top surface of lower outer wall, first grouting pipe is connected with grouting guide pipe, grouting guide pipe extends to the outside of the inside of lower outer wall;Two water-swelling waterstops, are buried in the top surface of lower outer wall, two water-swelling waterstops are respectively arranged on the opposite sides of first grouting pipe;Upper outer wall, is cast on the top surface of lower outer wall and reverse ridge;Waterproof roll material reinforcing layer, is laid in the construction joint of lower outer wall and upper outer wall;Waterproof roll material layer, is laid in the outside of lower outer wall, waterproof roll material reinforcing layer and upper outer wall.The application solves the method that conventional water-stop steel plate is set in the construction joint of basement outer wall to prevent seepage, the problem that water-stop steel plate is easily rusted and damaged in construction process and affects anti-seepage performance.