Steel pipe sheet pile combined structure and construction method

Abstract

The invention discloses a steel pipe sheet pile composite structure which comprises a plurality of steel pipe pile sets spliced end to end, each steel pipe pile set comprises a plurality of steel pipe piles arranged side by side, and an upper surrounding edge and a middle surrounding edge are detachably arranged on the tops and the middles of the inner side and the outer side of each steel pipe pile set. Stiffening rods are arranged between the two adjacent upper surrounding edges or the two adjacent middle surrounding edges on the inner sides of the two adjacent steel pipe pile groups; the steel plates are distributed between every two adjacent steel pipe piles, and each steel plate is detachably connected with every two adjacent steel pipe piles. The steel plates replace part of the steel pipe piles to connect the two adjacent steel pipe piles to form the cofferdam structure, so that the connection strength and safety of the cofferdam structure with the same area can be ensured, consumables are reduced, and the engineering cost is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a steel pipe sheet pile combined structure and a construction method. Background Art

[0002] The cofferdam is a temporary waterproof structure specially designed for the construction of bridge abutments. Its function is to block the water flow outside the cofferdam through the outer wall and concrete bottom of the cofferdam. At present, the locking steel pipe pile is widely used in the cofferdam structure construction of bridges due to its advantages such as high connection strength and high matching accuracy. However, the locking steel pipe pile cofferdam consumes a lot of materials and has a high engineering cost. Summary of the invention

[0003] The present invention provides a steel pipe sheet pile combination structure, which connects two adjacent steel pipe piles to form a cofferdam structure by replacing part of the steel pipe piles with steel plates, which not only ensures the connection strength and safety of cofferdam structures of the same area, but also reduces consumables and reduces engineering costs.

[0004] In order to achieve these purposes and other advantages according to the present invention, a steel pipe sheet pile composite structure is provided, comprising: A plurality of steel pipe pile groups spliced ​​end to end, each steel pipe pile group includes a plurality of steel pipe piles arranged side by side, each steel pipe pile group is provided with upper and middle ribs at the top and middle of both inner and outer sides, and a stiffening rod is provided between two adjacent upper ribs or two adjacent middle ribs on the inner sides of two adjacent steel pipe pile groups; A plurality of steel plates are respectively distributed between two adjacent steel pipe piles, and each steel plate is detachably connected to two adjacent steel pipe piles.

[0005] Preferably, in the steel pipe sheet pile combination structure, the steel pipe piles include: The steel pipe body has a first conical sealing portion at the bottom to seal the bottom opening, a pair of C-shaped buckles parallel to the outer wall of the steel pipe body are arranged, and an O-shaped buckle arranged at the end of the steel plate and parallel to the steel plate is inserted into the C-shaped buckle, and the middle part of the steel pipe body is detachably provided with the middle rib; A positioning connector is detachably arranged on the top of the steel pipe body and blocks the top opening of the steel pipe body. The upper surrounding rib is detachably arranged on the positioning connector.

[0006] Preferably, in the steel pipe sheet pile combination structure, a second conical sealing portion is provided at the bottom of the C-shaped buckle to seal the bottom opening, an elastic sealing layer is provided on the inner wall of the C-shaped buckle, the elastic sealing layer is sandwiched between the O-shaped buckle and the side wall of the C-shaped buckle, and a downward blade is provided at the bottom of the steel plate located at the side opening of the C-shaped buckle.

[0007] Preferably, in the steel pipe sheet pile assembly structure, the positioning connector includes an integrally formed: A connecting cover, which is arranged on the top of the steel pipe body and blocks the opening of the top of the steel pipe body; A positioning cylinder is arranged at the bottom of the connection cover and inserted in the steel pipe body. A pair of first positioning holes arranged vertically and opposite to each other are arranged on the side wall of the positioning cylinder. A positioning rod is movably inserted in the first positioning hole. A connecting tube, which is arranged at the bottom of the connecting cover and above the positioning rod, and is sleeved outside the steel pipe body, and a pair of vertical limiting grooves are arranged on the outer side wall of the connecting tube; When the limiting groove corresponds to the upper and lower positions of the C-shaped buckle, a pair of first positioning holes respectively correspond to a pair of second positioning holes located on the side wall of the steel pipe body, and the positioning rod is moved and inserted into the corresponding first positioning hole and second positioning hole; when the connecting line of a pair of limiting grooves is perpendicular to the connecting line of a pair of C-shaped buckles, the limiting groove is detachably connected to the corresponding upper surrounding rib.

[0008] Preferably, in the steel pipe sheet pile combination structure, a first connecting hole is provided through the groove wall of the limit groove, a plurality of insertion holes are provided on the upper surrounding rib, the limit groove is inserted in the corresponding insertion hole, a first screw rod parallel to the upper surrounding rib is inserted in the first connecting hole, a first limiting block is movably sleeved on the first screw rods located on both sides of the limit groove, the upper surrounding rib is clamped between the connecting tube and the first limiting block, and first nuts are threaded at both ends of the first screw rod.

[0009] Preferably, in the steel pipe sheet pile combination structure, a pair of accommodating tubes arranged up and down and perpendicular to the positioning tube are provided in the positioning tube, corresponding positioning rods are movably inserted in the accommodating tubes, and a spring is provided between the positioning rods and the side wall of the positioning tube in the accommodating tube.

[0010] Preferably, in the steel pipe sheet pile combination structure, a limiting ring is provided on the inner wall of the containing tube, and a second limiting block is provided at the end of the positioning rod connecting with the spring, and the size of the second limiting block is larger than the inner diameter of the limiting ring.

[0011] Preferably, in the steel pipe sheet pile combination structure, a pair of horizontal second screw rods are provided in the middle of the steel pipe body, and the second screw rods are inserted into corresponding second connecting holes on the middle surrounding rib and are locked and fixed with second nuts.

[0012] The present invention also provides a construction method of the steel pipe sheet pile composite structure described in any of the above technical solutions, comprising the following steps: Step 1: Determine the installation position of the steel pipe sheet pile composite structure, then locate a certain steel pipe pile and sink the steel pipe pile at the position; Step 2: Use the guide installation device to sink other steel pipe piles to be sunk; Step 3: Remove the guide installation device, and then install and sink the steel plate between each adjacent steel pipe pile; Step 4: Install upper and middle ribs at the top and middle of each steel pipe pile group, and install stiffening rods between two adjacent upper ribs and two adjacent middle ribs.

[0013] Preferably, in the construction method, the guide installation device comprises: A guide frame, in the middle of which is provided with a vertical plug-in column detachably connected to the steel pipe pile, a horizontal third screw is rotatably provided on the guide frame, the third screw is provided with two threaded sections with opposite rotation directions, a pair of moving blocks with opposite moving directions are movably provided on the third screw, a vertical limiting cylinder is provided on the moving block, the axes of a pair of limiting cylinders on a pair of moving blocks are coplanar with the axis of the plug-in column, a sliding block is provided on the limiting cylinder, and the sliding block is slidably provided in a sliding groove parallel to the third screw provided on the guide frame.

[0014] The present invention includes at least the following beneficial effects: the steel pipe sheet pile combination structure of the present invention includes a plurality of steel pipe pile groups spliced ​​end to end and a plurality of steel plates, each steel pipe pile group includes a plurality of side-by-side steel pipe piles, each steel plate is respectively distributed between two adjacent steel pipe piles and each steel plate is detachably connected to two adjacent steel pipe piles. By adopting the steel pipe pile and steel plate combination structure to build a cofferdam, not only the connection strength and safety of the cofferdam structure of the same area can be guaranteed, but also the consumables are reduced and the engineering cost is reduced. The detachable connection structure of the steel plate and the steel pipe pile of the present invention makes it easy to disassemble and assemble each part, which can be reused and saves resources.

[0015] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of a top view of a steel pipe sheet pile combined structure in one of the technical solutions of the present invention; Figure 2 It is a schematic diagram of the main structure of the steel pipe sheet pile combined structure part in one of the technical solutions of the present invention; Figure 3 It is a schematic diagram of the side section structure of the positioning connector in one of the technical solutions of the present invention; Figure 4 It is a schematic diagram of a top view of the structure of a positioning connector in one of the technical solutions of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of a steel pipe pile in one of the technical solutions of the present invention; Figure 6It is a schematic diagram of the top view of the structure of the guide installation device in one of the technical solutions of the present invention; Among them, 1-stiffening rod, 2-steel plate, 3-steel pipe pile, 4-upper surrounding rib, 5-middle surrounding rib, 6-second nut, 7-second screw, 8-limiting groove, 9-first screw, 10-first limiting block, 11-first nut, 12-positioning connector, 13-steel pipe body, 14-second positioning hole, 15-C-type buckle, 16-second conical sealing part, 17-first conical sealing part, 18-positioning rod, 19-accommodating tube, 20-connecting tube, 21-positioning tube, 22-connecting cover, 23-limiting ring, 24-second limiting block, 25-spring, 26-elastic sealing layer, 27-O-type buckle, 28-limiting tube, 29-moving block, 30-guide frame, 31-third screw, 32-plug-in column, 33-slide groove, 34-slider, 35-first connecting hole. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0018] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0019] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The orientation or position relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0020] like Figure 1 , Figure 2 As shown, the present invention provides a steel pipe sheet pile combined structure, comprising: A plurality of steel pipe pile groups spliced ​​end to end, each of which comprises a plurality of steel pipe piles 3 arranged side by side, each of which is provided with upper ribs 4 and middle ribs 5 on the top and middle of both inner and outer sides of the steel pipe pile group, and a stiffening rod 1 is provided between two adjacent upper ribs 4 or two adjacent middle ribs 5 on the inner sides of two adjacent steel pipe pile groups; A plurality of steel plates 2 are respectively distributed between two adjacent steel pipe piles 3 and each steel plate 2 is detachably connected to two adjacent steel pipe piles 3 .

[0021] The steel pipe sheet pile composite structure provided by the technical solution is mainly composed of a plurality of steel pipe piles 3 and a plurality of steel plates 2 distributed and spliced ​​at intervals. The plurality of steel pipe piles 3 are grouped to form a plurality of steel pipe pile groups. The plurality of steel pipe piles 3 of each steel pipe pile group are arranged side by side, which is convenient for increasing the surrounding rib structure and improving the overall strength of the structure. Each steel plate 2 is detachably connected to the two adjacent steel pipe piles 3. The tops on the inner and outer sides of each steel pipe pile group are detachably provided with upper surrounding ribs 4. The middle parts on the inner and outer sides of each steel pipe pile group are detachably provided with middle surrounding ribs 5. The upper surrounding ribs 4 and the middle surrounding ribs 5 can both be steel sections, which are light and have a stable structure. A stiffening rod 1 is arranged between the two adjacent upper surrounding ribs 4 or the two adjacent middle surrounding ribs 5 on the inner sides of the two adjacent steel pipe pile groups. The stiffening rod 1 can be steel sections and is connected to the upper surrounding ribs 4 or the middle surrounding ribs 5 by welding. The stiffening rod 1 can be cut off by tools such as electric saws when it is removed.

[0022] The construction and assembly method of the steel pipe sheet pile composite structure provided by the present technical solution is: first, a certain steel pipe pile 3 is sunk at a fixed point, and then other steel pipe piles 3 to be sunk are sunk at fixed points with the sunken steel pipe pile 3 as a reference, and then steel plates 2 are installed and sunk correspondingly between each adjacent steel pipe pile 3, and finally, upper surrounding ribs 4 and middle surrounding ribs 5 are respectively installed on the top and the middle of the steel pipe pile group composed of each steel pipe pile 3, and stiffening rods 1 are installed between two adjacent upper surrounding ribs 4 and two adjacent middle surrounding ribs 5.

[0023] The present invention includes at least the following beneficial effects: the steel pipe sheet pile combination structure of the present invention includes a plurality of steel pipe pile groups and a plurality of steel plates 2 spliced ​​end to end, each steel pipe pile group includes a plurality of steel pipe piles 3 arranged side by side, each steel plate 2 is respectively distributed between two adjacent steel pipe piles 3 and each steel plate 2 is detachably connected to two adjacent steel pipe piles 3, and by adopting the steel pipe pile 3 and steel plate 2 combined structure to build the cofferdam, not only the connection strength and safety of the cofferdam structure of the same area can be guaranteed, but also the consumables are reduced and the engineering cost is reduced; the top and the middle of the inner and outer sides of each steel pipe pile group can be detachably provided with an upper rib 4 and a middle rib 5, and a stiffening rod 1 is provided between the adjacent two upper ribs 4 or the adjacent two middle ribs 5 on the inner side of the adjacent two steel pipe pile groups, which can further improve the stability of the overall structure; the steel plate 2 is detachably connected to the steel pipe pile 3, and the upper rib 4 and the middle rib 5 can be detachably provided on the steel pipe pile group, which is convenient for disassembly and assembly, and each steel plate 2, steel pipe pile 3, upper rib 4 and middle rib 5 can be reused to save resources.

[0024] In another technical solution, Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, in the steel pipe sheet pile combination structure, the steel pipe pile 3 includes: The steel tube body 13 has a first conical sealing portion 17 at its bottom to seal the bottom opening. A pair of C-shaped buckles 15 parallel to the steel tube body 13 are arranged on the outer wall of the steel tube body 13. O-shaped buckles 27 arranged at the end of the steel plate 2 and parallel to the steel plate 2 are inserted into the C-shaped buckles 15. The middle part of the steel tube body 13 is detachably provided with the middle rib 5. The positioning connector 12 is detachably arranged on the top of the steel pipe body 13 and blocks the top opening of the steel pipe body 13 . The upper surrounding rib 4 is detachably arranged on the positioning connector 12 .

[0025] The position and opening angle of each C-type buckle 15 in the present technical solution can be adjusted and re-made according to needs when prefabricating the steel pipe piles 3. For example, the openings of a C-type buckle 15 on the steel pipe pile 3 at the head end of the steel pipe pile group and a C-type buckle 15 on the steel pipe pile 3 at the tail end of the upper steel pipe pile group need to be opposite, and the openings of two adjacent C-type buckles 15 on two adjacent steel pipe piles 3 are equal to facilitate the installation of each steel plate 2; the first conical sealing portion 17 blocks the bottom of the steel pipe body 13 to prevent mud and sand from entering its interior during sinking, and the cone shape is conducive to the downward movement of the steel pipe body 13; the C-type buckle 15 and the O-type buckle 27 are tightly and firmly connected; the positioning connector 12 can prevent rainwater and mud from entering its interior from the top of the steel pipe body 13.

[0026] In another technical solution, Figure 2 , Figure 5 As shown, in the steel pipe sheet pile composite structure, the bottom of the C-shaped buckle 15 is provided with a second conical sealing portion 16 to seal the bottom opening, and the inner wall of the C-shaped buckle 15 is provided with an elastic sealing layer 26, which is sandwiched between the O-shaped buckle 27 and the side wall of the C-shaped buckle 15, and the bottom of the steel plate 2 located at the side opening of the C-shaped buckle 15 is provided with a downward blade. The second conical sealing portion 16 seals the bottom of the C-shaped buckle 15 to prevent mud and sand from entering the interior during sinking and affecting the insertion of the O-shaped buckle 27; the elastic sealing layer 26 can be a rubber tube layer, and before the O-shaped buckle 27 is inserted into the C-shaped buckle 15, the rubber tube is kept intact. When the O-shaped buckle 27 is inserted into the C-shaped buckle 15 from the top, the rubber tube layer at the side opening of the C-shaped buckle 15 is cut open by the blade at the bottom of the steel plate 2, and the gap between the C-shaped buckle 15 and the O-shaped buckle 27 is sealed to prevent mud and sand from entering the interior and affecting the construction.

[0027] In another technical solution, Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, in the steel pipe sheet pile combination structure, the positioning connector 12 includes an integrally formed: A connecting cover 22, which is disposed on the top of the steel pipe body 13 and blocks the top opening of the steel pipe body 13; A positioning cylinder 21 is arranged at the bottom of the connection cover 22 and inserted into the steel pipe body 13. A pair of first positioning holes arranged vertically and opposite to each other are arranged on the side wall of the positioning cylinder 21. A positioning rod 18 is movably inserted into the first positioning hole. A connecting tube 20 is arranged at the bottom of the connecting cover 22 and above the positioning rod 18, and is sleeved outside the steel pipe body 13. A pair of vertical limiting grooves 8 are arranged on the outer side wall of the connecting tube 20; When the limiting groove 8 corresponds to the upper and lower positions of the C-shaped buckle 15, a pair of first positioning holes respectively correspond to a pair of second positioning holes 14 located on the side wall of the steel pipe body 13, and the positioning rod 18 is moved and inserted into the corresponding first positioning hole and second positioning hole 14; when the connecting line of a pair of the limiting grooves 8 is perpendicular to the connecting line of a pair of C-shaped buckles, the limiting groove 8 is detachably connected to the corresponding upper surrounding rib 4.

[0028] The limiting groove 8 is staggered with the first positioning hole. When the corresponding first positioning hole and the second positioning hole 14 are inserted with a positioning rod 18, the positioning rod 18 plays a limiting role to prevent the positioning tube 21 from rotating at will and thus prevent the positioning connector 12 from rotating at will. At this time, the limiting groove 8 can guide the steel plate 2. When the steel plate 2 is installed and sunk, its end can be first inserted into the limiting groove 8, moved downward along the limiting groove 8, and then the C-shaped buckle 15 is inserted to connect with the steel pipe pile 3; when the top of the steel plate 2 is out of the limiting groove 8, the positioning rod 18 can be moved to disengage it from the second positioning hole 14, the limiting effect is released, and then the positioning connector 12 is rotated to make the connecting line of a pair of limiting grooves 8 perpendicular to the steel plate 2, and then the surrounding rib 4 is installed on the limiting groove 8.

[0029] In another technical solution, in the steel pipe sheet pile assembly structure, the connecting tube 20 is sleeved outside the steel pipe body 13 through a threaded structure to prevent the positioning connector 12 from moving up and down at will, driving the upper surrounding rib to move up and down, and affecting the stability of the overall structure.

[0030] In another technical solution, Figure 1 , Figure 2 , Figure 4As shown, in the steel pipe sheet pile combination structure, the groove wall of the limiting groove 8 is provided with a first connection hole 35, and the upper surrounding rib 4 is provided with a plurality of insertion holes. The limiting groove 8 is inserted into the corresponding insertion holes, and the first connection hole 35 is provided with a first screw rod 9 parallel to the upper surrounding rib 4. The first screw rods 9 located on both sides of the limiting groove 8 are movably sleeved with first limit blocks 10, and the upper surrounding rib 4 is sandwiched between the connecting tube 20 and the first limit blocks 10. The first nuts 11 are screwed at both ends of the first screw rod 9. The first screw rod 9 and the first limit block 10 structure limit the upper surrounding rib 4 between the connecting tube 20 and the first limit block 10, that is, the upper surrounding rib 4 is placed on the top of the steel pipe body 13; the first nut 11 prevents the first limit block 10 from moving away from the first screw rod 9 at will.

[0031] In another technical solution, Figure 3 , Figure 5 As shown, in the steel pipe sheet pile combination structure, a pair of accommodating tubes 19 arranged up and down and perpendicular to the positioning tube 21 are provided in the positioning tube 21, a corresponding positioning rod 18 is movably inserted in the accommodating tube 19, and a spring 25 is provided between the positioning rod 18 and the side wall of the positioning tube 21 in the accommodating tube 19.

[0032] When it is necessary to install the positioning connector 12 on the steel pipe body 13, first push the positioning rod 18 into the accommodating tube 19, and then gradually insert the positioning cylinder 21 into the steel pipe body 13 from the top thereof. When the connection cylinder 20 overlaps with the steel pipe body 13, rotate and adjust the position of the positioning connector 12. When the first positioning hole corresponds to the second positioning hole 14, the positioning rod 18 moves from the accommodating tube 19 to the first positioning hole and the second positioning hole 14 under the thrust of the spring 25 to limit the positioning cylinder 21. When it is necessary to rotate the positioning cylinder 21, push the positioning rod 18, and the spring 25 is compressed until the positioning rod 18 is accommodated in the accommodating tube 19, so that the positioning connector 12 and the positioning cylinder 21 can be rotated. The accommodating tube 19 is used to accommodate the positioning rod 18, and the spring 25 makes the use and accommodation of the positioning rod 18 more convenient.

[0033] In another technical solution, Figure 5 As shown, in the steel pipe sheet pile assembly structure, a limiting ring 23 is provided on the inner wall of the receiving tube 19, and a second limiting block 24 is provided at the end of the positioning rod 18 that is connected to the spring 25. The size of the second limiting block 24 is larger than the inner diameter of the limiting ring 23. When the limiting ring 23 and the second limiting block 24 collide with each other, the positioning rod 18 extends out of the first positioning hole and the second positioning hole 14; the limiting ring 23 and the second limiting block 24 prevent the positioning rod 18 from moving excessively and detaching from the receiving tube 19.

[0034] In another technical solution, Figure 2As shown, in the steel pipe sheet pile assembly structure, a pair of horizontal second screws 7 are arranged in the middle of the steel pipe body 13, and the second screws 7 are inserted into the corresponding second connection holes on the middle rib 5 and are locked and fixed with second nuts 6. It is convenient to disassemble and assemble.

[0035] The present invention also provides a construction method of the steel pipe sheet pile composite structure in any one of the above technical solutions, comprising the following steps: Step 1: determine the installation position of the steel pipe sheet pile composite structure, then determine the position of a certain steel pipe pile 3, and sink the steel pipe pile 3 at the position; Step 2: Use the guide installation device to sink other steel pipe piles 3 to be sunk; Step 3: remove the guide installation device, and then install and sink the steel plate 2 between each adjacent steel pipe pile 3; Step 4: Install upper surrounding ribs 4 and middle surrounding ribs 5 at the top and middle of each steel pipe pile group, respectively, and install stiffening rods 1 between two adjacent upper surrounding ribs 4 and two adjacent middle surrounding ribs 5.

[0036] The present construction method first positions and sinks each steel pipe pile, then sinks each steel plate to connect each steel pipe pile to form a preliminary cofferdam structure, and finally installs upper and lower cofferdam ribs and stiffening rods on the steel pipe pile group to consolidate the overall structure of the cofferdam. During the construction process, there is no need for alternating construction of steel pipe piles and steel plates, making the construction process more orderly and efficient. The present construction method also utilizes a guide installation device to limit and sink the steel pipe piles, thereby ensuring the construction position accuracy of the steel pipe piles and further improving the construction quality.

[0037] In another technical solution, Figure 6 As shown, in the construction method of the steel pipe sheet pile combination structure, the guide installation device includes: A guide frame 30 is provided with a vertical plug-in column 32 detachably connected to the steel pipe pile 3 in the middle thereof, a horizontal third screw 31 is rotatably provided on the guide frame 30, the third screw 31 is provided with two threaded sections with opposite rotation directions, a pair of moving blocks 29 with opposite moving directions are movably provided on the third screw 31, a vertical limiting cylinder 28 is detachably provided on the moving block 29, the axes of a pair of limiting cylinders 28 on a pair of moving blocks 29 are coplanar with the axis of the plug-in column 32, a slider 34 is provided on the limiting cylinder 28, and the slider 34 is slidably provided in a slide groove 33 provided on the guide frame 30 and parallel to the third screw 31.

[0038] Each threaded section on the third screw rod 31 corresponds to a moving block 29, and the bottom plane of the moving block 29 is tangent to the top plane of the guide frame 30. When in use, the plug-in column 32 is connected to the top of a steel pipe pile 3 (specifically, the plug-in column 32 is inserted into the top of the steel pipe body 13), and the third screw rod 31 is rotated until a pair of moving blocks 29 moves to a proper position, and at the same time, the slider 34 moves in the slide groove 33, and then the steel pipe pile 3 to be sunk is inserted into the limiting cylinder 28 and sunk along the limiting cylinder 28; the limiting cylinder 28 The size and the concave-convex shape of the inner wall can be prefabricated in multiple pieces according to the structural shape of the outer wall of the steel pipe pile 3, so as to reserve moving space for structures such as the C-shaped buckle 15 and the second screw 7 on the steel pipe pile 3; the moving block 29 and the limiting cylinder 28 are detachably connected to facilitate the inspection and replacement of the limiting cylinder 28; the sliding block 34 is slidably set in the sliding groove 33 of the guide frame 30, and supports the limiting cylinder 28 together with the moving block 29; the limiting cylinder 28 is used to limit the vertical position of the steel pipe pile 3 during sinking, so as to further improve the construction position accuracy of the steel pipe pile 3.

[0039] The following embodiments are provided according to the steel pipe sheet pile combined structure and construction method of the present invention: A cofferdam construction method based on a steel pipe sheet pile composite structure comprises the following steps: Before construction, first prepare the steel pipe piles, steel plates, upper and lower sidewalls; the construction includes the following steps: Step 1: determine the construction and installation position of the steel pipe sheet pile composite structure, and locate the position of a certain steel pipe pile 3, and sink the first steel pipe pile 3 at the position; Step 2: remove the positioning connector 12 of the first steel pipe pile 3 from its steel pipe body 13, then insert the plug-in column 32 of the guide installation device into the first steel pipe body 13, rotate the guide frame 30 around the plug-in column 32 so that the limiting cylinder 28 is located in the extension direction of the steel pipe pile group where the first steel pipe pile 3 is located, and then rotate the third screw 31 to adjust the positions of the two limiting cylinders 28 until at least one of them is located directly above a certain steel pipe pile positioning point; Step 3: insert the second steel pipe pile 3 to be sunk into the limiting cylinder 28 located just above the steel pipe pile positioning point and perform the sinking operation on the second steel pipe pile 3; Step 4: Pull out the plug-in column 32 from the first steel pipe body, remove the positioning connector 12 of the second steel pipe pile 3 from its steel pipe body 13, and then insert the plug-in column 32 into the second steel pipe body, and at the same time, sleeve one of the limiting cylinders 28 on the first steel pipe pile 3 or adjust the angle of the guide frame 30 to empty one of the limiting cylinders 28, so that the other limiting cylinder 28 is located just above the positioning point of another steel pipe pile, and then insert the third steel pipe pile 3 to be sunk into the other limiting cylinder 28 and perform the sinking operation on the third steel pipe pile 3; Step 5: Repeat step 4 until the steel pipe bodies 13 of all steel pipe piles 3 are sunk into place; Step 6: Remove the guide installation device and install each positioning connector 12 on its corresponding steel pipe body 13. Specifically, first push the positioning rod 18 into the accommodating tube 19, and then gradually insert the positioning cylinder 21 into the steel pipe body 13 from the top thereof. When the connection cylinder 20 overlaps with the steel pipe body 13, rotate and adjust the position of the positioning connector 12, so that each positioning rod 18 moves and is inserted into the corresponding first positioning hole and second positioning hole 14 under the thrust of the spring 25. Step 7: insert the two ends of a steel plate 2 into the two opposite limiting grooves 8 on the two adjacent steel pipe piles 3, lower the steel plate 2 and sink it so that the O-shaped buckles 27 at the two ends of the steel plate 2 are respectively inserted into the two opposite C-shaped buckles 15 on the two adjacent steel pipe piles 3 and are separated from the limiting grooves 8; Step 8: Repeat step 7 until all steel plates 2 are sunk into place; For the installation of steel plates 2 at different positions, at least one limit groove 8 can be used for auxiliary installation according to the structure. For example, when the steel plates 2 at the joints of different steel pipe pile groups are installed, one limit groove 8 can be used for auxiliary installation. Step 9: Push the positioning rod 18 to store it in the accommodating tube 19, and at the same time rotate the positioning connector 12 so that the connecting line of the pair of limiting grooves 8 is perpendicular to the steel plate 2 of the steel pipe pile group where they are located; Step 10: sleeve each upper rib 4 on each limit groove 8 on the same side of the same group through a plurality of jacks, insert a first screw 9 into each first connection hole 35, sleeve a first limit block 10 on the first screw 9, and lock and fix it with a first nut 11; at the same time, sleeve each middle rib on each second screw 7 on the same side of the same group through a plurality of second connection holes, and sleeve a second nut 6 on the second screw 7 to lock and fix it; Step 11: Install the reinforcing rod 1 between two adjacent upper surrounding ribs 4 and two adjacent middle surrounding ribs 5.

[0040] The construction method of this technical solution is an exclusive design made according to the structural characteristics of each prefabricated steel pipe pile, steel plate, upper and lower surround. During construction, the steel pipe pile is first limited and sunk by using the guide installation device. Two limit cylinders for limiting the steel pipe pile are arranged on the guide installation device, and two steel pipe piles can be sunk at the same time, which not only ensures the construction position accuracy of the steel pipe pile, but also improves the construction efficiency. During the construction process, the steel plate is first limited by the limit groove, and then the upper surround is installed by using the limit groove to consolidate the overall structure, which not only ensures the position accuracy of the steel plate when sinking, but also improves the construction efficiency. In addition, there is no need to add additional steel plate limit devices during the construction process, saving the cost of construction materials. This construction method is not only orderly and efficient in construction, but also has high construction quality. The number of equipment and processing scale described here are used to simplify the description of the present invention. The application, modification and variation of the present invention are obvious to those skilled in the art.

[0041] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Steel pipe sheet pile composite structure, characterized in that: include: A plurality of steel pipe pile groups spliced ​​end to end, each steel pipe pile group includes a plurality of steel pipe piles arranged side by side, each steel pipe pile group is provided with upper and middle ribs at the top and middle of both inner and outer sides, and a stiffening rod is provided between two adjacent upper ribs or two adjacent middle ribs on the inner sides of two adjacent steel pipe pile groups; A plurality of steel plates are respectively distributed between two adjacent steel pipe piles, and each steel plate is detachably connected to two adjacent steel pipe piles.

2. The steel pipe sheet pile composite structure according to claim 1, characterized in that: The steel pipe pile comprises: The steel pipe body has a first conical sealing portion at the bottom to seal the bottom opening, a pair of C-shaped buckles parallel to the outer wall of the steel pipe body are arranged, and an O-shaped buckle arranged at the end of the steel plate and parallel to the steel plate is inserted into the C-shaped buckle, and the middle part of the steel pipe body is detachably provided with the middle rib; A positioning connector is detachably arranged on the top of the steel pipe body and blocks the top opening of the steel pipe body. The upper surrounding rib is detachably arranged on the positioning connector.

3. The steel pipe sheet pile composite structure according to claim 2, characterized in that: A second conical sealing portion is provided at the bottom of the C-shaped buckle to seal the bottom opening, an elastic sealing layer is provided on the inner wall of the C-shaped buckle, the elastic sealing layer is sandwiched between the O-shaped buckle and the side wall of the C-shaped buckle, and a downward blade is provided at the bottom of the steel plate located at the side opening of the C-shaped buckle.

4. The steel pipe sheet pile composite structure according to claim 2, characterized in that: The positioning connector includes an integrally formed: A connecting cover, which is arranged on the top of the steel pipe body and blocks the opening of the top of the steel pipe body; A positioning cylinder is arranged at the bottom of the connection cover and inserted in the steel pipe body. A pair of first positioning holes arranged vertically and opposite to each other are arranged on the side wall of the positioning cylinder. A positioning rod is movably inserted in the first positioning hole. A connecting tube, which is arranged at the bottom of the connecting cover and above the positioning rod, and is sleeved outside the steel pipe body, and a pair of vertical limiting grooves are arranged on the outer side wall of the connecting tube; When the limiting groove corresponds to the upper and lower positions of the C-shaped buckle, a pair of first positioning holes respectively correspond to a pair of second positioning holes located on the side wall of the steel pipe body, and the positioning rod is moved and inserted into the corresponding first positioning hole and second positioning hole; when the connecting line of a pair of limiting grooves is perpendicular to the connecting line of a pair of C-shaped buckles, the limiting groove is detachably connected to the corresponding upper surrounding rib.

5. The steel pipe sheet pile composite structure according to claim 4, characterized in that: A first connecting hole is provided through the groove wall of the limit groove, and a plurality of insertion holes are provided on the upper surrounding rib. The limit groove is inserted into the corresponding insertion hole, and a first screw rod parallel to the upper surrounding rib is inserted in the first connecting hole. First limiting blocks are movably sleeved on the first screw rods on both sides of the limit groove, and the upper surrounding rib is clamped between the connecting tube and the first limiting block. First nuts are threaded at both ends of the first screw rod.

6. The steel pipe sheet pile composite structure according to claim 4, characterized in that: A pair of accommodating tubes arranged up and down and perpendicular to the positioning tube are arranged in the positioning tube, a corresponding positioning rod is movably inserted in the accommodating tube, and a spring is arranged between the positioning rod and the side wall of the positioning tube in the accommodating tube.

7. The steel pipe sheet pile composite structure according to claim 6, characterized in that: A limiting ring is arranged on the inner wall of the containing tube, and a second limiting block is arranged at the end of the positioning rod that is butted against the spring, and the size of the second limiting block is larger than the inner diameter of the limiting ring.

8. The steel pipe sheet pile composite structure according to claim 2, characterized in that: A pair of horizontal second screw rods are arranged in the middle of the steel pipe body. The second screw rods are inserted into corresponding second connecting holes on the middle surrounding ribs and are fastened and fixed with second nuts.

9. The construction method of the steel pipe sheet pile composite structure according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Determine the installation position of the steel pipe sheet pile composite structure, then locate a certain steel pipe pile and sink the steel pipe pile at the position; Step 2: Use the guide installation device to sink other steel pipe piles to be sunk; Step 3: Remove the guide installation device, and then install and sink the steel plate between each adjacent steel pipe pile; Step 4: Install upper and middle ribs at the top and middle of each steel pipe pile group, and install stiffening rods between two adjacent upper ribs and two adjacent middle ribs.

10. The construction method according to claim 9, characterized in that: The guide installation device comprises: A guide frame, in the middle of which is provided with a vertical plug-in column detachably connected to the steel pipe pile, a horizontal third screw is rotatably provided on the guide frame, the third screw is provided with two threaded sections with opposite rotation directions, a pair of moving blocks with opposite moving directions are movably provided on the third screw, a vertical limiting cylinder is provided on the moving block, the axes of a pair of limiting cylinders on a pair of moving blocks are coplanar with the axis of the plug-in column, a sliding block is provided on the limiting cylinder, and the sliding block is slidably provided in a sliding groove parallel to the third screw provided on the guide frame.

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