1244 results about "Sheet pile" patented technology

The invention discloses a double-row steel sheet pile cofferdam construction method, which comprises the following steps of: before construction, measuring the original riverbed elevation of a cofferdam piling area, organizing steel pipes to enter a site according to a cross-section diagram and a construction sequence of a cofferdam, timely removing and recording if stone blocks and the like at the river bottom are measured in the measurement process, and before construction, checking and maintaining all mechanical equipment, so that the construction efficiency is improved. After entering the field, the steel pipes are stacked according to specifications, varieties and classifications, before pile conveying, the models and the number of the steel pipes used during construction are determined, and the steel pipes are arranged strictly according to the designed section. Compared with a construction scheme of adopting a Larsen steel sheet pile cofferdam and a temporary construction platform, the construction cost, the rental cost, the earthwork transportation cost, the earthwork compaction cost, the earthwork filling excavation filling cost and the like of temporary facilities can be saved, building construction is carried out in a water area needing a large area, the construction period is long, and the construction cost is low. The method is more economical and reasonable when being used for constructing structures in water under the conditions of high water level and the like.

The invention belongs to the technical field of steel sheet piles, and discloses a steel sheet pile for compensating stratum loss during pile pulling and a construction method.The steel sheet pile comprises a plurality of steel sheet pile units, and each steel sheet pile unit comprises a plurality of steel sheet piles; the foundation pit sides of the steel sheet pile units are connected with a plurality of compensation bags, and grouting systems are arranged on the foundation pit sides of the compensation bags. The foundation pit side of the steel sheet pile is coated with viscous grease, the side, facing the steel sheet pile, of the compensation bag is coated with pressure-sensitive adhesive, and the compensation bag is temporarily connected with the steel sheet pile; the grouting system comprises a main grouting pipe, the bottom of the main grouting pipe is connected with a horizontal grouting pipe, the side, facing the steel sheet pile, of the horizontal grouting pipe is connected with a plurality of flow dividing pipes, and the flow dividing pipes correspond to the compensation bags. A vertical branch pipe is upwards separated from the middle position of the flow dividing pipe, and is connected with a grouting connector at the bottom end of the corresponding compensation bag; the tail end of the flow dividing pipe is downwards divided into an inclined grouting pipeline, and the inclined grouting pipeline faces the lower portion of the steel sheet pile. The technical problem that filling is not timely due to the fact that grouting pipes are installed to fill gaps after steel sheet piles are pulled out in the prior art is solved.

The invention discloses a steel sheet pile cofferdam and underwater pier construction technology suitable for a geological environment near a water area. The steel sheet pile cofferdam and underwater pier construction technology comprises the following steps that the position of a steel sheet pile wall is planned; constructing a guide frame body for assisting in inserting and driving the steel sheet piles corresponding to the position of the steel sheet pile wall; steel sheet piles are sequentially and vertically inserted in the positions, corresponding to the steel sheet pile wall, of the guide frame body in a locking mode, and the steel sheet pile wall is formed; and closing operation is conducted according to the head end and the tail end of the formed steel sheet pile wall. The technical problem that in the prior art, a steel sheet pile cofferdam construction technology is not high in function applicability in the aspects of steel sheet pile inserting and driving quality, a foundation pit excavation and supporting system and construction environment adaptability is solved.

The invention belongs to the technical field of foundation pit supporting, and particularly relates to a steel sheet pile joint sealing performance in-situ detection process and a monitoring method. Through the cooperative design of the embedded pipe and the detection hole, the embedded pipe is filled with the liquid reagent, and if leakage happens to the joint of the steel sheet pile, the solid reagent in the detection hole can make contact with the liquid reagent to change color. Leaking stoppage is carried out after the color changing position is detected, and long-term monitoring is carried out by monitoring the soil body index of the leaking position so as to be used as a supplement of a detection process. The problem of ex-situ detection of steel sheet pile joint leakage and the problem of difficulty in leaking stoppage are solved, and the normal function of the steel sheet pile under the long-term working condition can be guaranteed.

The invention belongs to the technical field of building construction, and provides a bank protection pile foundation construction optimization method based on steel sheet pile sinking parameter feedback, which comprises the following steps of: evaluating a pile sinking state in real time according to hammering force data, acceleration data and perpendicularity data through a steel sheet pile sinking numerical model; a corresponding construction optimization decision is made in combination with the actual condition of the project; the real-time hammering force data, the acceleration data and the perpendicularity data are compared with corresponding preset parameter thresholds, and an optimization decision instruction is sent out; the optimization decision instruction is sent to piling equipment, and optimization measures are executed; the optimized pile sinking parameters are continuously monitored, the actual data average value of all the optimized parameters is compared with the preset ideal pile sinking state, the construction optimization decision is adjusted, and a closed-loop feedback optimization mechanism is formed; construction adjustment is conducted through feedback of pile sinking parameters of the steel sheet pile, the construction quality is guaranteed, the construction efficiency is improved, a closed-loop feedback mechanism is formed, and continuous optimization is achieved.

The invention belongs to the technical field of water transportation engineering static pressure pile planting machines, and particularly relates to a fixing clamp for a cold-bending Z-shaped steel sheet pile static pressure pile planting machine. The Z-shaped steel plate is arranged at the bottom of the pile planting machine body; the clamping assembly comprises a movable clamp, a fixed clamp, a pushing assembly and a deflection assembly, the movable clamp and the fixed clamp are distributed front and back and located at the bottom of the pile planting machine body, and the pushing assembly is connected with the movable clamp and used for driving the movable clamp to move; the deflection assemblies are arranged on the opposite sides of the movable clamp and the fixed clamp respectively. According to the U-shaped static pressure pile planting machine steel sheet pile fixing clamp, the U-shaped static pressure pile planting machine steel sheet pile fixing clamp is improved, the fixing clamp is changed into a structure with a notch, the fixing clamp can clamp the locking opening position of a cold-bending Z-shaped steel sheet, and therefore under the condition that clamping force is not lost, the stability of the fixing clamp when the fixing clamp clamps the Z-shaped steel sheet is guaranteed.

Examples include a pile cutting apparatus including a cutting device for cutting a sheet pile, with a front pile bearing surface, a rear pile bearing surface, and a cutting gap arranged therebetween. A table plane contains the front pile bearing surface. The cutting device further includes a movable upper blade, a lower blade including a cutting edge, and a cutting aid for fixing sheet piles that is upstream from the upper blade along a transport path for transporting sheet piles. A movable support element has a contact surface for supporting sheets and is movable between a support position and a disposal position. The contact surface, when the support element is arranged in the support position, is arranged in and / or beneath the table plane, and is closer to the cutting edge when the support element is in the support position than when the support element is in the disposal position.

The invention discloses a drainage and prevention combined type embankment structure and a construction method, and belongs to the technical field of water conservancy projects. The embankment structure comprises a base and a protection structure arranged on the base in a coherent mode, the protection structure is composed of main pipe piles and arc-shaped sheet piles which are arranged at intervals, and an embankment is divided into a backwater side and a waterside. Side edge and top consolidation bodies are formed at the bottoms of the main pipe piles through grouting of the auxiliary pipe piles and the miniature pipes so as to enhance bearing; the arc-shaped sheet piles are tightly connected with the main pipe piles through the connecting end plates, the cap beams, the locking opening pipes and the connecting bolts, and a sealing anti-seepage system is formed on the backwater side. Meanwhile, a water collecting and draining system is arranged in the main pipe pile, and water on the water facing side is allowed to be drained orderly through the water collecting holes, the graded gravel materials, the water collecting pipe and the drainage blind pipe. Through combination of'prevention 'and'drainage', the anti-seepage safety of the backwater side is ensured, seepage water is timely dredged to eliminate seepage pressure, damage to the structure caused by water pressure accumulation is avoided, and unification of stability and safety of the embankment structure is achieved.

The invention relates to a foundation pit supporting method based on combination of steel sheet piles and tubular piles, which comprises the following steps of: firstly, excavating a foundation trench at the periphery of a foundation pit, vertically driving the steel sheet piles into the foundation trench to form a continuous supporting wall body, and realizing a closed joint through lock catch occlusion; the top of the prestressed concrete pipe pile is lower than the steel sheet pile; welding the pipe piles and the steel sheet piles by adopting H-shaped steel connecting pieces, wherein the welding length is greater than or equal to 1.5 times of the section height of the section steel; cement grout with the volume 1.8-2.2 times that of the pipe pile is injected within 24 hours after the pipe pile is installed; the section width of the locking beams is 1.2-1.5 times that of the flanges of the steel sheet piles, and the steel bars are in lap joint with the reserved steel bars of the steel sheet piles; and finally, a horizontal steel support comprising a pressure sensor and an electric jack is installed, and the axial force is dynamically adjusted through displacement monitoring. According to the method, the rigidity of a supporting system is remarkably improved through cooperative stress of the combined structure, the method is suitable for deep foundation pit engineering in the soft soil area, deformation can be effectively controlled, and automatic monitoring and adjusting are achieved.

The invention relates to the technical field of supporting devices, and discloses a combined flexible self-balancing foundation pit supporting device which comprises two constructional columns pre-buried at the corner of a foundation pit, a plurality of mutually spliced steel sheet piles are installed between the two constructional columns, I-shaped steel is further fixedly installed between the two constructional columns, and the I-shaped steel is fixedly connected with the constructional columns. The I-shaped steel is installed on the side, away from the wall of the foundation pit, of the steel sheet pile, and a plurality of anchor rods penetrating into the wall of the foundation pit are inserted into the outer surface of the I-shaped steel in a penetrating mode. Through the traction effect of a plurality of steel cables, a connecting plate can drive a winding shaft to rotate, a plurality of transmission gears are installed on the outer surface of the winding shaft, the transmission gears are meshed with a transmission rack, so that a push plate is pushed to move towards a steel sheet pile, and the push plate exerts force through the steel sheet pile inclining outwards to help push the steel sheet pile back to the wall of a foundation pit. Therefore, the collapsed pit wall is effectively supported, the effect that the steel sheet piles support the pit wall of the foundation pit in a balanced mode is achieved, and the supporting capacity of the foundation pit is improved.

The invention discloses an ecological pile steel formwork system and a construction method thereof. The ecological pile steel formwork system comprises a foundation module, a base, a pile body end plate and a pile head end plate. The basic module comprises a bottom die, a side die and a hinge, the bottom die and the side die are connected through the hinge, and a convex template is arranged on the bottom die; the base comprises a square steel tube, single-spliced channel steel and double-spliced channel steel, and the square steel tube, the single-spliced channel steel and the double-spliced channel steel are connected through welding; the pile body end plate comprises at least one of a steel template with a pile tip and a steel template without the pile tip; the pile head end plate comprises a pile head steel template and an ecological hole steel template, and the ecological hole steel template is arranged on the pile head steel template; wherein the basic module and the base are fixed through welding; the foundation module, the pile body end plates and the pile head end plates are transversely connected through U-shaped bolts; lower hanging steel plates are arranged on the lower portion of the pile body end plate and the lower portion of the pile head end plate and inserted into the double-spliced channel steel of the base to be positioned. The device is simple in structure and convenient to mount and dismount.

The invention discloses an in-situ solidification construction method for a highway shallow foundation in a water-rich section of a permafrost region. The in-situ solidification construction method comprises the following steps: step 1, preparation at the early stage of construction; secondly, steel sheet pile enclosure water insulation is conducted; thirdly, in-situ soil solidification construction is conducted; fourthly, dynamic compaction encryption treatment is conducted; step 5, quality detection and molding acceptance inspection; and step 6, subsequent environmental protection and safety guarantee. Three dimensions of a steel sheet pile waterproof technology, a high-weather-resistance composite curing material in-situ curing technology and a dynamic compaction technology are integrated, and a set of systematized and standardized construction scheme is formed. According to the multi-dimensional combined method, the foundation treatment effect is improved, the comprehensiveness and pertinence of construction are enhanced, and a more effective solution is provided for road foundation treatment in the water-rich section of the permafrost region.

The invention relates to the technical field of steel sheet pile cofferdams, in particular to a deep and long steel sheet pile cofferdam structure which comprises two steel pipe sets symmetrically distributed front and back, each steel pipe set is composed of a plurality of steel pipes linearly and evenly distributed, and a steel sheet pile is jointly connected between every two adjacent steel pipes. The deep and long steel sheet pile cofferdam structure further comprises a plurality of supporting mechanisms, and the supporting mechanisms are evenly distributed on the front sides and the rear sides of the two steel pipe sets. The sealing limiting parts and the supporting parts are alternately distributed and connected with each other, so that the multiple sealing limiting parts and the multiple supporting parts form a whole, two gaps with the same structure and adjacent positions are mutually complemented, force transmission can be conducted between the multiple sealing limiting parts and the multiple supporting parts, stress is uniform, and the sealing effect is good. And therefore, the overall supporting and limiting strength of the multiple sealing and limiting parts and the multiple supporting parts on the multiple steel pipes and the multiple steel sheet piles is improved, and the phenomenon that the single section of the cofferdam deforms is avoided.

The invention belongs to the technical field of foundation pit construction, and particularly relates to a foundation pit supporting structure and a construction method thereof.The foundation pit supporting structure comprises a plurality of steel pipe piles arranged in the circumferential direction of a foundation pit at intervals, first lock catches are fixed to the outer sides of the steel pipe piles, Larsen steel sheet piles are arranged between the steel pipe piles, and second lock catches are fixed to the two sides of each Larsen steel sheet pile; the adjacent steel pipe piles and Larsen steel sheet piles are connected in a clamped mode through corresponding first lock catches and second lock catches, surrounding purlins are fixed to the inner sides of the multiple steel pipe piles, and concrete supporting pieces are arranged between the surrounding purlins and the corresponding Larsen steel sheet piles. The steel pipe piles are matched with the Larsen steel sheet piles, so that the rigidity of a supporting system is guaranteed while rapid supporting is guaranteed, and less garbage is generated after dismantling.

The invention relates to an active unloading sheet pile revetment reinforcement design method and structure, and belongs to the technical field of revetment reinforcement. Channel parameters and soil mechanical characteristics are measured, design reinforcement piles with the same height as original pile foundations are arranged on the back edge of a revetment, and a pile spacing calculation formula is established based on the soil arching effect; the load sharing ratio of the reinforcing pile is controlled and designed by adjusting the pile diameter; the reinforcing structure designed through the method comprises prestressed sheet piles, a bearing platform, designed reinforcing piles, a gravity type retaining wall, a slope protection surface layer, a concrete coping, an original mud surface line and a designed mud surface line, the pile diameter and the pile distance of the designed reinforcing piles are dynamically adjusted according to the dredging depth, and the thicker a dredging soil layer is, the larger the soil pressure is, the larger the pile diameter is, and the denser the distance is. An original revetment upper structure does not need to be dismantled, the construction period is greatly shortened, and resource waste is reduced; the front line of the revetment does not move forwards, and use of an existing navigable water area is not affected; the construction mode is flexible, land dry land or water construction can be selected according to surrounding conditions, the construction period is short, the speed is high, and the construction cost is low.

The invention discloses an anti-clogging rapid laying construction method for municipal drainage pipelines in a pluvial area, and relates to the technical field of municipal engineering. According to the method, through construction early-stage investigation and pretreatment, a high-pressure jet grouting pile and a steel sheet pile are combined to form a water interception curtain and vacuum well point dewatering is adopted, and a pipeline with a nanometer hydrophobic coating and a flow guide protruding edge is prefabricated; during rapid excavation, rapid hardening concrete is used for supporting, and a prefabricated module foundation with a permeable blind pipe is laid; laser positioning is adopted for hoisting, and double sealing is adopted for interfaces; graded gravel and a curing agent are used for backfilling, and ground penetrating radar is matched for detection; acceptance inspection is combined with a closed water test and an endoscope, and an intelligent monitoring device is installed to be connected into an intelligent system. The problems that construction efficiency is low and pipelines are prone to clogging in rainy areas are solved, the construction period is shortened by 30% or above, the initial clogging rate is reduced by 60%, and the method is suitable for drainage projects in areas with the annual precipitation being 800 mm or above.

The invention discloses a prestressed concrete H-shaped sheet pile and a construction method, and relates to the technical field of hydraulic engineering, the prestressed concrete H-shaped sheet pile comprises an H-shaped sheet pile body integrally formed by two flanges and a web plate, and further comprises prestressed steel bars arranged in the flanges and the web plate in the length direction of the sheet pile body, and the two ends of the sheet pile body are fixedly connected with reinforcing end covers. One face of the reinforcing end cover is connected with the prestressed steel bars, the other face of the reinforcing end cover is symmetrically provided with U-shaped inserting frames and inserting plates connected with the two U-shaped inserting frames, drainage grooves are formed in the two sides of the web, and river side drainage holes and shore side drainage holes communicated with the drainage grooves are formed in the two flanges respectively. U-shaped reinforcing ribs which are vertically distributed are arranged at the joints of the web and the flanges. By means of the prestressed reinforcement network arranged in the flanges and the web and the connection supporting structure of the U-shaped reinforcing ribs with the inclined top faces, the flanges on the shore side are more stable than the flanges on the other side, and the flexural capacity of the sheet pile is improved.

The invention belongs to the field of composite piles, and provides a civil engineering composite pile structure which comprises two hollow column piles which are symmetrically arranged, a plurality of steel sheet piles are arranged between the two hollow column piles, a connecting sheet pile is arranged between the hollow column piles and the steel sheet piles, and a connecting mechanism is further arranged in the connecting sheet pile. The connecting mechanism is used for connecting a hollow column pile and a steel sheet pile to the outer surface of a connecting sheet pile, the connecting mechanism comprises guide inner grooves, the guide inner grooves are formed in the two sides of the connecting sheet pile, gap baffles are movably arranged in the guide inner grooves, limiting baffles are fixedly installed on the edge portions of one sides of the gap baffles, and fixing inner cavities are symmetrically formed in the middle of the connecting sheet pile; an extrusion structure is further arranged in the fixed inner cavity; through the synergistic effect of the connecting sheet pile, the gap baffle and the extrusion structure, the gap between the hollow column pile and the steel sheet pile can be actively filled, the problem of concrete pouring disconnection is avoided, and the overall connecting strength of the combined pile is improved.

The invention relates to a precast concrete sheet pile water stop structure. Grooves are formed in the splicing faces of the two sides of a sheet pile, and connecting pieces are arranged on the grooves; the connecting piece comprises a fixing part, a connecting part and water stopping parts, the two ends of the connecting part are connected with the fixing part and the water stopping parts correspondingly, the fixing part is located in the grooves and connected with the sheet pile, and the two water stopping parts on the two opposite grooves are matched with each other and form a first face and a second face which are attached to each other; the first surface is provided with at least one convex peak, and the second surface is provided with a concave valley matched with the convex peak. The prefabricated concrete sheet pile water stop structure has the following advantages that the first face and the second face are attached, it is guaranteed that the two water stop parts are tightly combined, and water seepage is prevented; compared with traditional grouting water stopping, construction is complex, cost is high, the connecting piece can be installed in advance, after the sheet piles are spliced, the first face and the second face are attached to each other, and the sheet piles are automatically pressed and closed under the back side water and soil pressure to achieve the good water stopping effect.

The utility model relates to a steel casing connected fixed bracket steel sheet pile guiding device which comprises steel casings, electric control hydraulic connecting rods, steel brackets and a limiting guiding frame, a sliding groove is formed in the side wall of the tail section of the steel casing, the electric control hydraulic connecting rods are installed in the sliding grooves of the adjacent steel casings, the steel brackets are arranged in the sliding grooves in the peripheries of the steel casings, and the limiting guiding frame is connected with the steel casings. Limiting guide frames are installed on the steel corbels to serve as steel sheet pile guide devices. The steel sheet pile driving guiding device has the advantages that the steel sheet pile driving guiding device can be rapidly built, a traditional welding procedure is omitted, the overall stability of the structure can be guaranteed through the electric control hydraulic connecting rod, the steel sheet pile driving quality is improved through the limiting guiding frame, and the technical and economic benefits are remarkable.

The utility model belongs to the technical field of port engineering, and particularly relates to a port engineering lattice type steel sheet pile structure stable in connection, which comprises an upper steel sheet pile, a positioning hole is formed in the front surface of the upper steel sheet pile, an upper mounting plate is mounted at the top of the upper steel sheet pile, and a lower mounting plate is mounted at the bottom of the upper mounting plate. A first inserting groove is formed in the top of the upper mounting plate, a first fixing bolt is mounted on the front face of the upper mounting plate, a sleeve plate is mounted at the bottom of the upper steel sheet pile, an adjusting knob is mounted on the front face of the sleeve plate, a second inserting groove is formed in one side face of the sleeve plate, and a lower steel sheet pile is mounted at the bottom of the sleeve plate. A lower mounting plate is mounted at the bottom of the lower steel sheet pile, and an inserting plate is mounted at the bottom of the lower mounting plate, so that the adjustability of the steel sheet pile is improved, the steel sheet pile can be more conveniently extended in length and width during connection, the overall strength of the steel sheet pile is enhanced, and the steel sheet pile can bear larger impact force.

The invention relates to the technical field of Larsen steel sheet pile construction, and discloses a Larsen steel sheet pile cofferdam construction method suitable for a deepwater area, which comprises the following construction steps: 1) arranging a construction platform; (2) four positioning piles are driven into the construction position to form a construction area; 3) arranging a guide frame in the construction area, wherein the guide frame is provided with a guide arm; (4) a plurality of Larsen steel sheet piles are driven along the guide arms, the bottoms of the Larsen steel sheet piles extend into the solid soil layer, and adjacent Larsen steel sheet piles are arranged in a sealed mode; (5) enclosing purlins are arranged on the pile rows, and steel supports are arranged between the enclosing purlins to form an inner supporting structure; (6) water and sludge in the construction area are sucked till the solid soil layer is exposed at the bottom, and the Larsen steel sheet pile cofferdam is formed by the multiple Larsen steel sheet piles and the multiple inner supporting structures; the bottoms of the Larsen steel sheet piles extend to a solid soil layer and are arranged in a sealed mode, and a plurality of inner supporting structures are arranged, so that the water stopping performance of the cofferdam is improved, and meanwhile the stability and the water flow impact resistance are enhanced.

The utility model relates to the technical field of steel sheet pile cofferdams, in particular to a detachable cofferdam module for flood control engineering, which comprises a steel sheet pile structure, connecting buckle structures are fixed on two opposite side surfaces of the steel sheet pile structure, each connecting buckle structure comprises a first inserting buckle and a second inserting buckle, and a hollow area is arranged in a steel sheet pile. And a plurality of triangular support frame structures are fixed in the hollow area. The steel sheet pile solves the problems that two adjacent steel sheet piles in the prior art cannot be installed at a right angle or a smaller angle during installation, the structure is simple, and the steel sheet piles are easy to bend.

The invention discloses a deep foundation pit supporting structure based on intelligent monitoring and self-adaptive adjustment and a construction method, and relates to the field of foundation pit supporting structures.The deep foundation pit supporting structure comprises steel sheet piles, a supporting lifting assembly is arranged at the tops of the middles of the multiple steel sheet piles, the supporting lifting assembly comprises supporting columns, and the multiple supporting columns are installed in the middles of the multiple steel sheet piles; according to the steel sheet pile supporting device, the telescopic length of the output end of the oil hydraulic cylinder is controlled through an external controller, so that the pressure between the steel sheet pile supporting steel frames is always kept within a safe pressure range, instability of steel sheet piles is avoided, and the stability of the steel sheet piles is improved. The construction safety and stability of the deep foundation pit are guaranteed, a triangle is formed among the connecting rods connected through the threaded sleeves, the I-shaped steel and the supporting columns, and the supporting stability of the whole foundation pit is further enhanced through the stability of the triangle.

The invention relates to the technical field of municipal engineering construction, in particular to an anti-seepage foundation pit supporting structure without grooving and pipe burying and a real-time monitoring construction method.The anti-seepage foundation pit supporting structure comprises a pipeline extending in the X-axis direction; at least two steel sheet piles; the two steel sheet piles are symmetrically arranged on the two sides of the pipeline, each steel sheet pile is provided with a parallel section and bent sections at the two ends, an opening is reserved between the bent sections at the ends of the steel sheet piles located on the two sides of the pipeline, and a reinforcing and plugging assembly is arranged at the opening; the jet grouting piles are overlapped, gaps are complemented through the reinforcing piles, an underground water permeation channel is thoroughly cut off, and water gushing is completely eradicated; the jet grouting column wraps the buckling groove of the steel sheet pile, gap water seepage is blocked, the connection rigidity is enhanced, stress monitoring captures mechanical response of the pipeline in real time, the pipeline stress is controlled within a safety range, construction disturbance is reduced, and structural stability and pipeline safety are guaranteed.

The invention discloses a drilling device for deep foundation pit engineering construction, and relates to the technical field of foundation pit drilling. Comprising a drilling installation part, an old hole positioning part is installed on the drilling installation part, and the old hole positioning part is used for limiting the drilling installation part; a hole sticking piece is mounted on the old hole positioning piece; the hole sticking piece is used for sticking a steel sheet pile hole; a displacement detection piece is mounted on the hole pasting piece; the displacement detection piece is used for controlling and compensating drilling offset; a displacement control piece is mounted at the bottom of the displacement detection piece; the problems that according to an existing drilling device for deep foundation pit engineering construction, adjacent drill holes are prone to deflection, automatic compensation of drill hole deflection is inconvenient, and soil is prone to falling into old holes are solved. The displacement control piece is adopted, the old hole positioning piece can be controlled, pressure is applied to the drill bit body in a compensating mode, the drill bit body can be assisted to drill holes with higher precision, and follow-up smooth installation of the steel sheet pile is promoted.

A Y-shaped steel sheet pile welding tool is characterized in that a deformation preventing platform (4) is included, an inverted-V-shaped boss (7) is fixed to the deformation preventing platform (4), and the two sides of the V-shaped boss (7) are provided with a downward-pressing type rapid clamp (2) used for pressing a V-shaped steel sheet (6) and a push-pull type rapid clamp (5) used for pressing a linear steel sheet (12); the deformation-preventing platform (4) is clamped between the driving pneumatic clamp (8) and the driven pneumatic clamp (1), the driving pneumatic clamp (8) is installed on a fixed support (11) and connected with a motor (9) driving the driving pneumatic clamp (8) to rotate, the driven pneumatic clamp (1) is installed on a movable support (10), and the movable support (10) is installed on a movable platform (13) for the movable support (10) to move. According to the invention, the urgent need of production is met, the device has the advantages of simple structure, convenience in manufacturing and mounting and capability of greatly improving the production efficiency, and the requirement of batch production of 3Y-shaped steel plates can be met.

The utility model relates to a pipe-jacking working well structure supported by steel sheet piles, which comprises the steel sheet piles arranged on the peripheral side wall of a pipe-jacking working well in a surrounding manner, a reinforced concrete top beam is arranged at the top of each steel sheet pile, reinforced concrete plate supports are respectively arranged at four corners formed by the reinforced concrete top beams, and a pipe-jacking rear backrest wall body is arranged on the inner side wall of each steel sheet pile. The pipe jacking machine is tightly attached to the pipe jacking rear backrest wall, the driving end of the pipe jacking machine is connected with a to-be-jacked pipeline arranged in the pipe jacking working well, and the pipe jacking machine can jack the to-be-jacked pipeline into the side wall of the pipe jacking working well. The pipe-jacking working well structure supported by the steel sheet piles is high in construction speed and saves engineering cost, the tops of the steel sheet piles are connected through the reinforced concrete top beams, the overall stability of an enclosure structure is improved, the reinforced concrete plate supports are adopted for replacing traditional steel supports, the supports are prevented from falling off, construction safety is guaranteed, and construction efficiency is improved. The steel sheet piles are arranged in a high-low staggered mode, the steel bars are prevented from directly penetrating through the steel sheet piles, and binding operation of the steel bars of the reinforced concrete top beam is facilitated.

The invention discloses a supporting integrated structure for an underground structure and a construction method of the supporting integrated structure, and relates to the technical field of underground structure construction.The supporting integrated structure comprises a plurality of sheet pile supports, movable formworks and supporting connecting pieces; the sides, close to each other, of the sheet pile supports are connected in a clamped mode through butt-joint buckles to form an integral structure with closed ends which are spaced in the opposite directions, and the integral structure is inserted into the outer side of a foundation pit. The movable template is vertically arranged on the other side of the integral structure; and the support connecting piece is horizontally supported and connected between the sheet pile support and the movable template. According to the construction method, the sheet pile support and the movable formwork are safely connected through the adjustable connecting piece, so that the structural outer formwork and the steel sheet pile support which are stressed respectively tend to integrally and jointly resist the soil pressure outside the foundation pit and the concrete pouring pressure inside the foundation pit, and the stability of the support integrated structure is improved; and the excavation area of the foundation pit is reduced to a certain extent, and the construction efficiency is improved.

The utility model discloses an anti-seepage foundation pit supporting structure which comprises a U-shaped steel sheet pile and a jacking assembly and is characterized in that J-shaped plates are fixedly connected to the two sides of the U-shaped steel sheet pile respectively, and clamping grooves are formed in the inner sides of the J-shaped plates; two sleeves are fixedly connected to the outer side of the U-shaped steel sheet pile; the jacking assembly is used for connecting the two U-shaped steel sheet piles and jacking the U-shaped steel sheet pile installed between the two U-shaped steel sheet piles, the jacking assembly comprises a transverse rod, a threaded hole is formed in the middle of the transverse rod, a screw is in threaded connection with the threaded hole, the two ends of the transverse rod are fixedly connected with inserting plates correspondingly, and the inserting plates are connected with the U-shaped steel sheet pile. Rubber strips are pasted and fixed to one sides of the ends of the J-shaped plates respectively, a cylinder is fixedly connected to the inner side of the U-shaped steel sheet pile, and the diameter of an inner hole of the cylinder is equal to the diameter of the ends of the screws. According to the utility model, mutual sealing is realized through jacking and pressing of the jacking and pressing assembly, an excellent sealing effect is provided after splicing, and water seepage is effectively prevented.