Fabricated steel pipe sheet pile foundation pit supporting structure

Abstract

The invention relates to the technical field of foundation pit supporting engineering, in particular to a fabricated steel pipe sheet pile foundation pit supporting structure which mainly comprises a pile pipe body, a first connecting part and a second connecting part, the first connecting part is arranged at the end of the pile pipe body, and the second connecting part is arranged on the side face of the pile pipe body; by means of the arrangement that the butt joint pipe head can be inserted into the butt joint annular groove, people can conduct butt joint centering on the two pile pipe bodies under the condition that a positioning tool is not used, time and labor are saved during operation, operation is extremely convenient, the two pile pipe bodies which are in butt joint centering can be firmly fixed together through the fixing structure, the radial size cannot be increased, and the construction efficiency is improved. And the resistance is smaller during piling, the power consumption is lower, people can conveniently detach the two pile pipe bodies after construction is completed, the pile pipe is more practical, meanwhile, people can conveniently carry out splicing work, the working efficiency is higher, and the pile pipe is more practical.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit support engineering, and in particular to an assembled steel pipe sheet pile foundation pit support structure. Background Art

[0002] In foundation pit support for construction, municipal engineering and water conservancy projects, steel pipe sheet piles are widely used due to their strong bearing capacity and good durability. Their structure is a steel tubular monomer. The ends of steel tubular units are equipped with a first connection, typically a flange or welded connection, for end-to-end assembly. However, the flange increases the radial dimension of the pile, significantly increasing resistance during driving and consuming more power. Welded connections require alignment tools, making them inconvenient to use. The steel tubular units are pre-installed with secondary connections on both sides, often using mortise and tenon joints or slots, to facilitate assembly. However, when the convex portion is inserted into the concave portion, it relies on friction to secure it, resulting in weak lateral bearing capacity and prone to misalignment under load. The slot-type design requires precise alignment, making installation difficult, and can easily lead to deformation and loosening of the connection under long-term stress. At the same time, the existing assembly method has poor sealing performance of the gaps and is prone to leakage, which in turn causes water gushing from the foundation pit, settlement of the surrounding soil, and even endangers construction safety. Therefore, it is urgent to design an assembled steel pipe sheet pile foundation pit support structure to solve the above problems. Summary of the Invention

[0003] The object of the present invention is to provide an assembled steel pipe sheet pile foundation pit support structure to solve the problems existing in the assembly of the first connecting part and the second connecting part of the existing steel pipe sheet piles proposed in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions: An assembled steel pipe sheet pile foundation pit support structure includes: a pile pipe body, a first connecting part and a second connecting part, wherein the first connecting part is arranged at the end of the pile pipe body, and the second connecting part is arranged on the side of the pile pipe body.

[0005] Preferably, the first connecting portion includes a docking ring groove and a docking pipe head. The docking ring groove is provided on the end face of one end of the pile pipe body. The docking pipe head is fixedly connected to the end face of the other end of the pile pipe body. The docking pipe head can be inserted into the inside of the docking ring groove. The pile pipe body is provided with a fixing structure for fixing the docking pipe head inside the docking ring groove.

[0006] By adopting the above technical solution, people can dock and align two pile pipe bodies without using positioning tools, which saves time and effort and is extremely convenient.

[0007] Preferably, the second connecting part includes an assembling tube body, an assembling sliding hole, a sealing strip, and a limiting strip. The assembling tube body is fixedly connected to one side of the pile pipe body, the assembling sliding hole is opened on the surface of the assembling tube body, the sealing strip is fixedly connected to the other side of the pile pipe body, the sealing strip can be inserted into the inside of the assembling sliding hole and can block it, the limiting strip is fixedly connected to the side of the sealing strip away from the pile pipe body, and the limiting strip can be inserted into the inside of the assembling tube body and block the assembling sliding hole from the inside.

[0008] By adopting the above technical solution, the assembly sliding hole is blocked from both the inside and the outside, which improves the sealing performance and can reduce the probability of leakage.

[0009] Preferably, the fixing structure is a welding mark at the butt joint surfaces of the two pile pipe body ends.

[0010] By adopting the above technical solution, not only can the connection and fixation between the two pile pipe bodies be achieved, but also the radial dimension will not be increased, the resistance during piling is smaller, and the power consumption is lower.

[0011] Preferably, the fixing structure includes an inner through-hole and an outer through-hole, the inner through-hole is provided on the butt joint, and the outer through-hole is provided on the pile pipe body, the outer through-hole can be aligned with the inner through-hole, a bolt is inserted into the outer through-hole, the bolt is threadedly engaged with the inner through-hole, and a recess is provided on the surface of the pile pipe body for accommodating the hexagonal end of the bolt.

[0012] By adopting the above technical solution, not only can the connection and fixation between the two pile pipe bodies be achieved, but also the radial size will not be increased, the resistance during piling is smaller, the power consumption is lower, and it is convenient for people to separate the two pile pipe bodies after the construction is completed, which is more practical.

[0013] Preferably, the bolts are replaced with rivets.

[0014] By adopting the above technical solution, not only can the connection and fixation between the two pile pipe bodies be achieved, but also the radial size will not be increased, the resistance during piling is smaller, the power consumption is lower, and it is convenient for people to carry out assembly work, which is more efficient and more practical.

[0015] Preferably, an assembling circular groove is provided at one end of the assembling tube body, a C-shaped gasket is filled inside the assembling circular groove, an assembling male bevel is provided on this end face of the assembling tube body, an assembling convex ring is fixedly connected to the other end face of the assembling tube body, an assembling female bevel is provided on this end face of the assembling tube body, the assembling convex ring can be movably inserted into the assembling circular groove and squeeze the C-shaped gasket, and the assembling male bevel can be inserted into the assembling female bevel to achieve docking.

[0016] By adopting the above technical solution, the contact surface between the assembled tube body on the upper pile tube c and the assembled tube body on the lower pile tube d is made larger, which helps to improve the sealing performance.

[0017] Preferably, the sealing strip includes a basic baffle, a sealing arc surface and a basic strip. The basic baffle is fixedly connected to the surface of the pile pipe body and is symmetrical to the assembled tube body. A sealing arc surface is provided on the surface of the basic baffle away from the pile pipe body. The sealing arc surface can be tightly fastened to the surface of the assembled tube body. A basic strip located in the middle is fixedly connected to the inner wall of the sealing arc surface. The basic strip can be inserted into the assembled sliding hole and block it. The side of the basic strip away from the sealing arc surface is an arc surface, and the arc surface can be flush with the inner wall of the assembled tube body.

[0018] By adopting the above technical solution, the assembled tube body can be reinforced, the difficulty of deformation of the assembled tube body can be increased, which helps to increase the sealing effect. At the same time, the buckling effect between the sealing arc surface and the surface of the assembled tube body and the plug-in effect between the basic insert and the assembled sliding hole can further increase the sealing effect, and the sealing effect is excellent.

[0019] Preferably, the opening width of the assembling sliding hole located on the outer surface of the assembling tube body is larger than the opening width thereof located on the inner surface of the assembling tube body, and the basic insert can fit with the inner wall of the assembling sliding hole.

[0020] By adopting the above technical solution, the contact area between the inner wall of the assembled sliding hole and the sealing arc surface can be increased, which helps to improve the sealing performance.

[0021] Preferably, the limiting strip includes a strip body and an elastic strip, both the strip body and the elastic strip have an arc surface, a convex groove is provided on the elastic strip, the strip body is movably inserted into the convex groove, the elastic strip is fixedly installed on the inner side of the base insert, the arc surfaces on the strip body and the elastic strip share a transmission shaft under no force conditions, a buffer portion is formed at the end of the elastic strip, the elastic strip can be inserted into the inside of the assembled tube body, and the elastic strip is pressed against the inner wall of the assembled tube body.

[0022] By adopting the above technical solution, the assembly sliding hole can be further sealed, and the sealing effect is better.

[0023] Preferably, a protruding plate is fixedly connected to the surface of the long strip body, and the protruding plate passes through the opening of the convex groove. An accommodating groove is provided on the surface of the protruding plate, and a sealing cover is installed on the surface of the protruding plate by bolts. The sealing cover seals the accommodating groove, and an expansion groove is provided on the inner wall of the accommodating groove. A plurality of embedding holes are provided on the inner wall of the accommodating groove and the elastic long strip. The embedding holes on the elastic long strip correspond to the embedding holes on the inner wall of the accommodating groove one by one. A locking threaded column is embedded in the embedding hole, and the locking threaded column can only be rotated. A threaded hole is provided, and a locking threaded column is threadedly matched with the threaded hole. One end of the locking threaded column is located inside the accommodating groove and is fixedly sleeved with a locking gear. A driving shaft body is movably sleeved on the inner wall of one side of the accommodating groove. The other end of the driving shaft body is fixedly connected with an inner hexagonal sleeve. A positioning hole is provided on the end face of the protruding plate, and the inner hexagonal sleeve is slidably inserted into the positioning hole. A tool socket is provided on the end face of the elastic strip, and the tool socket is aligned with the positioning hole. A spiral worm gear is fixedly installed on the outside of the driving shaft body, and the spiral worm gear is meshed with the locking gear for transmission.

[0024] By adopting the above technical solution, when the pile pipe body is sunk, people can adjust the pressure between the elastic strip and the inner wall of the assembled pipe body, thereby increasing the sealing performance and achieving a better sealing effect.

[0025] Preferably, a rectangular hole is provided on one end face of the basic baffle, a displacement sliding hole is provided on the inner side face of the basic insert, the displacement sliding hole is connected to the rectangular hole, a sliding insert is slidably inserted into the inside of the rectangular hole, a linkage strip is fixedly connected to one surface of the sliding insert, the linkage strip is slidably inserted into the displacement sliding hole and a water channel is formed between the two, a threaded hole is provided on the linkage strip, a filling chamber is formed between the surface of the sliding insert on one side of the linkage strip and the inner wall of the rectangular hole, the filling chamber is filled with water-absorbing and swelling material, a positive slope is provided at one end of the basic baffle, and a negative slope is provided at the other end of the basic baffle.

[0026] By adopting the above technical solution, when the seal fails and leakage occurs, the leaking water will enter the filling chamber through the water channel, and the water-absorbing and swelling material will absorb water and apply a thrust to the sliding strip away from the displacement sliding hole, causing the elastic strip to further deform, thereby increasing the sealing effect and achieving a better sealing effect.

[0027] Compared with the prior art, the present invention has the following beneficial effects: The butt joint can be inserted into the butt joint groove, so that people can butt and align the two pile pipe bodies without using positioning tools, which saves time and effort and is extremely convenient. The fixed structure can firmly fix the two pile pipe bodies together without increasing the radial size, resulting in less resistance and lower power consumption during piling. It is also convenient for people to separate the two pile pipe bodies after the construction is completed, which is more practical and convenient for people to carry out assembly work, which is more efficient and more practical.

[0028] The sealing strip can seal the assembly sliding hole from the outside, and the limiting strip can seal the assembly sliding hole from the inside, thereby blocking the assembly sliding hole from both the inside and the outside, which has better sealing performance and can reduce the chance of leakage. The assembly convex ring can be movably inserted into the assembly circular groove and squeeze the C-type gasket to increase the sealing performance. The assembly male bevel can be inserted into the assembly female bevel and docking can be achieved, so that the sealing contact surface is larger, which can further increase the sealing performance. The combination of the basic retaining strip, the sealing arc surface and the basic insert can The tube body is reinforced, and the difficulty of deformation of the assembled tube body is increased, which helps to further increase the sealing effect. At the same time, the buckling effect between the sealing arc surface and the surface of the assembled tube body and the plug-in effect between the basic insert and the assembled sliding hole can increase the sealing effect. By setting the opening width of the assembled sliding hole on the outer surface of the assembled tube body to be larger than the opening width on the inner surface of the assembled tube body, the contact area between the inner wall of the assembled sliding hole and the sealing arc surface can be increased, which helps to increase the sealing performance. The assembled sliding hole can be further sealed by the elastic strip, and the sealing effect is excellent.

[0029] By means of the limiting strip, when the pile pipe body is sunk, people can adjust the pressure between the elastic strip and the inner wall of the assembled pipe body, thereby increasing the sealing performance. By means of the coordination of the rectangular cavity, displacement sliding hole, sliding insert, linkage strip, filling chamber, and water-absorbing and swelling material, when the seal fails and leakage occurs, the leaking water will enter the filling chamber through the waterway. The water-absorbing and swelling material absorbs water and becomes larger, and applies a thrust to the sliding insert away from the displacement sliding hole, causing the elastic strip to further deform, thereby further increasing the sealing effect. In this way, leakage caused by random deformation under the action of external force is dealt with, and the sealing effect is excellent. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 For the present invention Figure 1 Schematic diagram of the three-dimensional structure at one end; Figure 3 For the present invention Figure 1 Schematic diagram of the three-dimensional structure at the other end; Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle; Figure 5 For the present invention Figure 1 Schematic diagram of the three-dimensional structure assembled laterally; Figure 6 For the present invention Figure 5 Enlarged view of point B in the middle; Figure 7 For the present invention Figure 1 Schematic diagram of the three-dimensional structure of end-to-end butt assembly; Figure 8 For the present invention Figure 7 Enlarged view of point C in the middle; Figure 9 For the present invention Figure 7 Another three-dimensional structural schematic diagram; Figure 10 For the present invention Figure 9 Enlarged view of point D in the middle; Figure 11 For the present invention Figure 1 Schematic diagram of the three-dimensional structure of the middle limit strip; Figure 12 For the present invention Figure 11 Schematic diagram of the split structure; Figure 13 For the present invention Figure 12 Schematic diagram of the three-dimensional structure of the middle locking gear; Figure 14 This is a schematic diagram of the three-dimensional structure of the first type of pile head installed in the present invention; Figure 15 For the present invention Figure 14 Another three-dimensional structural schematic diagram; Figure 16 For the present invention Figure 15 Schematic diagram of the three-dimensional structure of the first type of pile head; Figure 17 This is a schematic diagram of the three-dimensional structure of the second type of pile head of the present invention; Figure 18 It is a schematic diagram of the three-dimensional structure of the third pile head of the present invention.

[0031] In the picture: 1. Pile pipe body; 1a. Left pile pipe; 1b. Right pile pipe; 1c. Upper pile pipe; 1d. Lower pile pipe; 2. Assemble the tube body; 201. Assemble the circular groove; 202. Assemble the C-type washer; 203. Assemble the male bevel; 204. Assemble the convex ring; 205. Assemble the female bevel; 3. Assemble the sliding hole; 4. Sealing strip; 401. Basic retaining strip; 402. Sealing arc surface; 403. Basic insert; 404. Rectangular cavity; 405. Displacement sliding hole; 406. Sliding insert; 407. Linkage strip; 408. Filling chamber; 5. Limiting strip; 501. Strip body; 502. Elastic strip; 503. Convex groove; 504. Buffer; 505. Protruding plate; 506. Accommodating groove; 507. Sealing cover; 508. Expansion groove; 509. Mounting hole; 510. Locking threaded column; 511. Threaded hole; 512. Locking gear; 513. Drive shaft; 514. Hexagon socket; 515. Positioning hole; 516. Tool socket; 517. Spiral worm gear; 6. Docking ring groove; 7. Butt joint; 8. Internal perforation; 9. External perforation; 10. Pile head; 101. Joint inner ring; 102. Docking outer ring; 103. First blocking block; 104. Second blocking block; 105. Beveled strip. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0033] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0034] like Figures 1-18 As shown, the present application provides an assembled steel pipe sheet pile foundation pit support structure, including: a pile pipe body 1, a first connecting part and a second connecting part, the first connecting part is arranged at the end of the pile pipe body 1, and the second connecting part is arranged on the side of the pile pipe body 1.

[0035] For the first example, please refer to Figure 1 The first connecting part includes a docking ring groove 6 and a docking pipe joint 7. The docking ring groove 6 is opened on the end face of one end of the pile pipe body 1, and the docking pipe joint 7 is fixedly connected to the end face of the other end of the pile pipe body 1. The docking pipe joint 7 can be inserted into the inside of the docking ring groove 6. The pile pipe body 1 is provided with a fixing structure for fixing the docking pipe joint 7 inside the docking ring groove 6.

[0036] See also Figure 1 and Figure 7 During assembly, align the butt joint 7 on the upper pile pipe 1c with the butt joint groove 6 on the lower pile pipe 1d, then gradually lower the upper pile pipe 1c, and then insert the butt joint 7 on the upper pile pipe 1c into the butt joint groove 6 on the lower pile pipe 1d, then the end faces of the two pile pipe bodies 1 are butted together, and then the two pile pipe bodies 1 are fixed together by the fixing structure, and then the butt joint 7 is fixed in the butt joint groove 6, so as to achieve the purpose of butt jointing the end faces of the two pile pipe bodies 1.

[0037] In the second embodiment, the second connecting part includes an assembling tube body 2, an assembling sliding hole 3, a sealing strip 4, and a limiting strip 5. The assembling tube body 2 is fixedly connected to one side of the pile pipe body 1, the assembling sliding hole 3 is opened on the surface of the assembling tube body 2, the sealing strip 4 is fixedly connected to the other side of the pile pipe body 1, the sealing strip 4 can be inserted into the inside of the assembling sliding hole 3 and can block it, the limiting strip 5 is fixedly connected to the side of the sealing strip 4 away from the pile pipe body 1, and the limiting strip 5 can be inserted into the inside of the assembling tube body 2 and block the assembling sliding hole 3 from the inside.

[0038] See also Figure 1 、 Figure 5 and Figure 6 During assembly, align the sealing strip 4 and the limiting strip 5 on the left pile tube 1a with the assembling sliding hole 3 and the assembling tube body 2 on the right pile tube 1b respectively, and then move the left pile tube 1a closer to the position of the right pile tube 1b. Then, insert the sealing strip 4 into the assembling sliding hole 3 to block the assembling sliding hole 3 from the outside. At the same time, insert the limiting strip 5 into the assembling tube body 2 to block the assembling sliding hole 3 from the inside to seal the assembling sliding hole 3.

[0039] In the third embodiment, the fixing structure is a welding trace at the butt joint surfaces of the two pile pipe bodies 1 .

[0040] During assembly, welding is performed along the butt joint gap between the two pile pipe bodies 1 to achieve assembly and fixation between the two pile pipe bodies 1 .

[0041] For the fourth example, please refer to Figure 1 The fixing structure includes an inner through-hole 8 and an outer through-hole 9. The inner through-hole 8 is provided on the butt joint 7, and the outer through-hole 9 is provided on the pile pipe body 1. The outer through-hole 9 can be aligned with the inner through-hole 8. A bolt is inserted into the outer through-hole 9, and the bolt is threadedly matched with the inner through-hole 8. A sink groove is provided on the surface of the pile pipe body 1, and the sink groove is used to accommodate the hexagonal end of the bolt.

[0042] During assembly, the bolt is passed through the outer hole 9 and inserted into the inner hole 8, and then the bolt is rotated. Then the bolt enters the inner hole 8 under the action of the thread fit, and then the hexagonal end on the bolt is inserted into the sink groove, and then the butt joint 7 is fixed in the butt ring groove 6 to achieve the assembly purpose.

[0043] In the fifth embodiment, the bolts are replaced with rivets.

[0044] During assembly, the rivet is passed through the outer perforation 9 and the inner perforation 8, and then a corresponding tool is used to apply force to the rivet. The rivet is then deformed and the butt joint 7 is fixed in the butt ring groove 6 to achieve the assembly purpose.

[0045] For the sixth embodiment, please refer to Figure 2 、 Figure 3 and Figure 7 、 Figure 8 One end of the assembled tube body 2 is provided with an assembling circular groove 201, and the inside of the assembling circular groove 201 is filled with a C-shaped gasket 202. An assembling male inclined surface 203 is provided on this end face of the assembled tube body 2, and an assembling convex ring 204 is fixedly connected to the other end face of the assembled tube body 2. An assembling female inclined surface 205 is provided on this end face of the assembled tube body 2. The assembling convex ring 204 can be movably inserted into the inside of the assembling circular groove 201 and squeeze the C-shaped gasket 202. The assembling male inclined surface 203 can be inserted into the assembling female inclined surface 205 to achieve docking.

[0046] The cross sections of the male assembling bevel 203 and the female assembling bevel 205 are both V-shaped.

[0047] When the two pile pipe bodies 1 are aligned and docked, the assembling convex ring 204 is aligned with the assembling circular groove 201. At this time, the assembling male inclined surface 203 is aligned with the assembling female inclined surface 205. When the pile pipe bodies 1 are aligned and docked, the assembling convex ring 204 is inserted into the assembling circular groove 201 and squeezes the C-shaped gasket 202. The assembling male inclined surface 203 is inserted into the assembling female inclined surface 205 and docking is achieved. The assembling male inclined surface 203 fits tightly against the inner wall of the assembling female inclined surface 205. A sealing gasket can also be provided between the assembling male inclined surface 203 and the inner wall of the assembling female inclined surface 205 to further enhance the sealing effect.

[0048] For the seventh embodiment, please refer to Figure 3 and Figure 4 、 Figure 6 The sealing strip 4 includes a basic baffle 401, a sealing arc surface 402 and a basic inserting strip 403. The basic baffle 401 is fixedly connected to the surface of the pile pipe body 1 and is symmetrical with the assembled pipe body 2. A sealing arc surface 402 is provided on the surface of the basic baffle 401 away from the pile pipe body 1. The sealing arc surface 402 can be tightly buckled on the surface of the assembled pipe body 2. A basic inserting strip 403 located in the middle is fixedly connected to the inner wall of the sealing arc surface 402. The basic inserting strip 403 can be inserted into the assembled sliding hole 3 and block it. The side of the basic inserting strip 403 away from the sealing arc surface 402 is an arc surface, and the arc surface can be flush with the inner wall of the assembled pipe body 2.

[0049] During assembly, the basic insert 403 is inserted into the assembling sliding hole 3 to block the assembling sliding hole 3 and improve the sealing performance. At the same time, the sealing arc surface 402 is snapped onto the surface of the assembling tube body 2 near the assembling sliding hole 3. The fitting effect of the sealing arc surface 402 and the surface of the assembling tube body 2 can improve the sealing performance. The snapping force applied by the sealing arc surface 402 to the assembling tube body 2 increases the difficulty of deformation of the assembling tube body 2, and fixes the opening width of the assembling sliding hole 3, which helps to further improve the sealing performance and reduce the chance of leakage.

[0050] For the eighth embodiment, please refer to Figure 6The opening width of the assembling sliding hole 3 located on the outer surface of the assembling tube body 2 is greater than the opening width thereof located on the inner surface of the assembling tube body 2 , and the basic insert 403 can fit with the inner wall of the assembling sliding hole 3 .

[0051] An elastic pad can be attached to the surface of the basic insert 403 . The elastic pad is located between the surface of the basic insert 403 and the inner wall of the assembly sliding hole 3 , which helps to further improve the sealing performance.

[0052] For the ninth embodiment, please refer to Figure 4 and Figure 12 The limiting strip 5 includes a strip body 501 and an elastic strip 502. Both the strip body 501 and the elastic strip 502 have an arc surface. A convex groove 503 is provided on the elastic strip 502. The strip body 501 is movably inserted into the convex groove 503. The elastic strip 502 is fixedly installed on the inner side of the basic insert 403. The arc surfaces on the strip body 501 and the elastic strip 502 share a central axis under no force conditions. A buffer portion 504 is formed at the end of the elastic strip 502. The elastic strip 502 can be inserted into the inside of the assembled tube body 2, and the elastic strip 502 is pressed on the inner wall of the assembled tube body 2.

[0053] During assembly, when the limiting strip 5 is inserted into the interior of the assembling tube body 2, the elastic strip 502 is pressed against the inner wall of the assembling tube body 2 under the action of its own elastic force. After the limiting strip 5 is installed in place, the elastic strip 502 blocks the assembling sliding hole 3 from the inside of the assembling tube body 2, and the sealing effect is better.

[0054] After the two pile pipe bodies 1 are butted together, the buffer portions 504 at the ends of the corresponding two elastic strips 502 are butted together and in a compressed state, thereby playing a sealing role.

[0055] For the tenth embodiment, please refer to Figure 4 、 Figure 11 and Figure 12 、 Figure 13, a protruding plate 505 is fixedly connected to the surface of the long strip body 501, and the protruding plate 505 passes through the opening of the convex groove 503, and an accommodating groove 506 is provided on the surface of the protruding plate 505. A sealing cover 507 is installed on the surface of the protruding plate 505 with bolts, and the sealing cover 507 seals the accommodating groove 506. An expansion groove 508 is provided on the inner wall of the accommodating groove 506, and a plurality of embedding holes 509 are provided on the inner wall of the accommodating groove 506 and the elastic long strip 502. The embedding holes 509 on the elastic long strip 502 correspond to the embedding holes 509 on the inner wall of the accommodating groove 506 one by one, and a locking threaded column 510 is embedded in the embedding hole 509. The locking threaded column 510 can only be rotated. A threaded hole 511 is provided, and a locking threaded column 510 is threadedly matched with the threaded hole 511. One end of the locking threaded column 510 located inside the accommodating groove 506 is fixedly sleeved with a locking gear 512, and a driving shaft body 513 is movably sleeved on the inner wall of one side of the accommodating groove 506. The other end of the driving shaft body 513 is fixedly connected with an inner hexagonal sleeve 514. A positioning hole 515 is provided on the end face of the protruding plate 505, and the inner hexagonal sleeve 514 is slidably inserted into the positioning hole 515. A tool socket 516 is provided on the end face of the elastic strip 502, and the tool socket 516 is aligned with the positioning hole 515. A spiral worm gear 517 is fixedly installed on the outside of the driving shaft body 513, and the spiral worm gear 517 is engaged with the locking gear 512 for transmission.

[0056] During operation, a tool is used to pass through the tool socket 516 and insert into the hexagonal socket 514, and then the hexagonal socket 514 is rotated. Then the hexagonal socket 514 rotates with the spiral worm gear 517 through the driving shaft 513. Then the spiral worm gear 517 rotates with the locking thread column 510 through the meshing action between it and the locking gear 512. Then the locking thread column 510 moves toward the inside of the threaded hole 511 under the action of the threaded cooperation. Then the locking thread column 510 applies pressure to the long strip body 501 toward the assembly sliding hole 3. Then the long strip body 501 applies pressure to the elastic long strip 502, pressing the elastic long strip 502 against the inner wall of the assembled tube body 2 to increase the sealing performance, while increasing the lateral bearing capacity and increasing the deformation resistance.

[0057] For the eleventh embodiment, please refer to Figure 2 、 Figure 4 、 Figure 10 、 Figure 11 and Figure 12A rectangular hole 404 is provided on one end face of the basic baffle 401, and a displacement sliding hole 405 is provided on the inner side face of the basic insert 403. The displacement sliding hole 405 is connected to the rectangular hole 404, and a sliding insert 406 is slidably inserted into the inside of the rectangular hole 404. A linkage strip 407 is fixedly connected to one surface of the sliding insert 406. The linkage strip 407 is slidably inserted into the displacement sliding hole 405 and a water channel is formed between the two. A threaded hole 511 is provided on the linkage strip 407, and a filling chamber 408 is formed between the surface of the sliding insert 406 on one side of the linkage strip 407 and the inner wall of the rectangular hole 404. The filling chamber 408 is filled with water-absorbing and swelling material. A positive slope is provided at one end of the basic baffle 401, and a negative slope is provided at the other end of the basic baffle 401.

[0058] The water-absorbing and swelling material can be any one of a high molecular weight water-absorbing resin, swelling soil, and swelling rubber.

[0059] When the pile pipe body 1 is successfully docked, the positive bevel at the end of one basic baffle 401 fits together with the negative bevel at the end of the other basic baffle 401 to seal. A sealing gasket can be provided between the positive and negative bevels to enhance the sealing effect.

[0060] During operation, the pile pipe body 1 is slightly deformed due to the action of external force, resulting in reduced fit between the sealing arc surface 402 and the surface of the assembled pipe body 2, between the basic insert 403 and the inner wall of the assembled sliding hole 3, and between the basic insert 403 and the elastic strip 502, causing leakage. The leaked water enters the filling chamber 408 through the gap between the sealing arc surface 402 and the assembled pipe body 2, the gap between the basic insert 403 and the inner wall of the assembled sliding hole 3, the gap between the basic insert 403 and the elastic strip 502, and the water channel. Then, the material absorbs water and swells, and absorbs water to become larger and applies a thrust to the sliding insert 406 away from the displacement sliding hole 405, causing the elastic strip 502 to further deform, thereby increasing the sealing effect. The sealing effect is better, and at the same time, the lateral bearing capacity is greater and the deformation resistance is greater.

[0061] For the twelfth embodiment, please refer to Figure 14-16 One end of the pile pipe body 1 is equipped with a pile head 10, and the pile head 10 includes a joint inner ring 101, which is inserted into the docking ring groove 6 and fixed by a fixing structure. The end of the joint inner ring 101 is connected to a docking outer ring 102, and a first blocking block 103 and a second blocking block 104 are symmetrically installed on the side of the docking outer ring 102. The first blocking block 103 and the second blocking block 104 are connected with an inclined surface 105. The first blocking block 103 corresponds to the assembled pipe body 2 and is used to separate the soil in the forward direction of the assembled pipe body 2 to prevent the soil from entering the assembled pipe body 2; the second blocking block 104 corresponds to the limiting strip 5 and is used to protect the limiting strip 5 so that the limiting strip 5 will not directly rub against the soil, thereby reducing friction loss and being suitable for sinking and installing the first pile pipe body 1.

[0062] The soil layer is separated to both sides by the inclined surface on the inclined surface 105 .

[0063] See also Figure 17 Only the first blocking block 103 and the inclined surface 105 are installed on the docking outer ring 102. The first blocking block 103 corresponds to the assembled tube body 2 and is used to separate the soil in the forward direction of the assembled tube body 2 to prevent the soil from entering the assembled tube body 2. It is suitable for the pile pipe body 1 installed at the side position of the first pile pipe body 1. At this time, the limiting strip 5 on the subsequently installed pile pipe body 1 is inserted into the assembled tube body 2 on the pile pipe body 1 installed first.

[0064] See also Figure 18 Only the second blocking block 104 and the inclined surface 105 are installed on the docking outer ring 102 to protect the limiting strip 5 so that the limiting strip 5 will not directly rub against the soil, thereby reducing friction loss. It is suitable for the pile pipe body 1 installed at the side position of the first pile pipe body 1. At this time, the assembled pipe body 2 installed on the subsequent pile pipe body 1 is sleeved and installed on the limiting strip 5 on the pile pipe body 1 installed first.

[0065] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative; within the scope of the present invention, the technical features of the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0066] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An assembled steel pipe sheet pile foundation pit support structure, comprising: A pile pipe body (1), a first connecting portion and a second connecting portion, characterized in that the first connecting portion is arranged at the end of the pile pipe body (1), and the second connecting portion is arranged on the side of the pile pipe body (1); The first connecting portion comprises a docking ring groove (6) and a docking pipe joint (7), wherein the docking ring groove (6) is provided on the end surface of one end of the pile pipe body (1), and the docking pipe joint (7) is fixedly connected to the end surface of the other end of the pile pipe body (1), and the docking pipe joint (7) can be inserted into the interior of the docking ring groove (6). The pile pipe body (1) is provided with a fixing structure for fixing the docking pipe joint (7) inside the docking ring groove (6); The second connecting portion comprises an assembling tube body (2), an assembling sliding hole (3), a sealing strip (4), and a limiting strip (5); the assembling tube body (2) is fixedly connected to one side of the pile tube body (1); the assembling sliding hole (3) is opened on the surface of the assembling tube body (2); the sealing strip (4) is fixedly connected to the other side of the pile tube body (1); the sealing strip (4) can be inserted into the inside of the assembling sliding hole (3) and can block it; the limiting strip (5) is fixedly connected to the side of the sealing strip (4) away from the pile tube body (1); the limiting strip (5) can be inserted into the inside of the assembling tube body (2) and block the assembling sliding hole (3) from the inside.

2. The assembled steel pipe sheet pile foundation pit support structure according to claim 1 is characterized in that: The fixing structure is a welding trace at the butt joint surfaces of the two pile pipe bodies (1).

3. The assembled steel pipe sheet pile foundation pit support structure according to claim 1, characterized in that: The fixing structure comprises an inner through hole (8) and an outer through hole (9), wherein the inner through hole (8) is provided on the butt joint (7), and the outer through hole (9) is provided on the pile pipe body (1), wherein the outer through hole (9) can be aligned with the inner through hole (8), wherein a bolt is inserted into the outer through hole (9), and wherein the bolt is threadably engaged with the inner through hole (8), and wherein a recess is provided on the surface of the pile pipe body (1), wherein the recess is used to accommodate the hexagonal end of the bolt.

4. The assembled steel pipe sheet pile foundation pit support structure according to claim 3 is characterized in that: The bolts are replaced with pop rivets.

5. The assembled steel pipe sheet pile foundation pit support structure according to any one of claims 2 to 4, characterized in that: One end of the assembled tube body (2) is provided with an assembled circular groove (201), the interior of the assembled circular groove (201) is filled with a C-shaped gasket (202), an assembled male bevel (203) is provided on this end face of the assembled tube body (2), an assembled convex ring (204) is fixedly connected to the other end face of the assembled tube body (2), an assembled female bevel (205) is provided on this end face of the assembled tube body (2), the assembled convex ring (204) can be movably inserted into the interior of the assembled circular groove (201) and squeeze the C-shaped gasket (202), and the assembled male bevel (203) can be inserted into the assembled female bevel (205) to achieve docking.

6. The assembled steel pipe sheet pile foundation pit support structure according to claim 5, characterized in that: The sealing insert (4) comprises a basic retaining strip (401), a sealing arc surface (402) and a basic insert (403). The basic retaining strip (401) is fixedly connected to the surface of the pile pipe body (1) and is symmetrical with the assembled pipe body (2). The sealing arc surface (402) is provided on the surface of the basic retaining strip (401) away from the pile pipe body (1). The sealing arc surface (402) can be tightly fastened to the surface of the assembled pipe body (2). A basic insert (403) located in the middle is fixedly connected to the inner wall of the sealing arc surface (402). The basic insert (403) can be inserted into the assembled sliding hole (3) and block it. The side of the basic insert (403) away from the sealing arc surface (402) is a circular arc surface, and the circular arc surface can be flush with the inner wall of the assembled pipe body (2).

7. The assembled steel pipe sheet pile foundation pit support structure according to claim 6, characterized in that: The opening width of the assembling sliding hole (3) located on the outer surface of the assembling tube body (2) is greater than the opening width of the assembling sliding hole (3) located on the inner surface of the assembling tube body (2), and the basic insert (403) can fit with the inner wall of the assembling sliding hole (3).

8. The assembled steel pipe sheet pile foundation pit support structure according to claim 7, characterized in that: The limiting strip (5) comprises a strip body (501) and an elastic strip (502), wherein the strip body (501) and the elastic strip (502) both have an arc surface, and a convex groove (503) is provided on the elastic strip (502), wherein the strip body (501) is movably inserted into the convex groove (503), and the elastic strip (502) is fixedly mounted on the inner side of the basic insert (403), and the arc surfaces on the strip body (501) and the elastic strip (502) share a transmission shaft under a force-free condition, and a buffer portion (504) is formed at the end of the elastic strip (502), and the elastic strip (502) can be inserted into the interior of the assembled tube body (2), and the elastic strip (502) is pressed against the inner wall of the assembled tube body (2).

9. The assembled steel pipe sheet pile foundation pit support structure according to claim 8, characterized in that: A protruding plate (505) is fixedly connected to the surface of the long strip body (501), and the protruding plate (505) passes through the opening of the convex groove (503). A receiving groove (506) is provided on the surface of the protruding plate (505). A sealing cover (507) is bolted to the surface of the protruding plate (505), and the sealing cover (507) seals the receiving groove (506). The inner wall of the receiving groove (506) is provided with an expansion groove. (508), a plurality of embedding holes (509) are provided on the inner wall of the accommodating groove (506) and the elastic strip (502), the embedding holes (509) on the elastic strip (502) correspond one to one with the embedding holes (509) on the inner wall of the accommodating groove (506), a locking threaded column (510) is embedded in the embedding hole (509), and the locking threaded column (510) can only rotate. The base insert (403) is provided with a plurality of embedding holes (509) on the inner wall of the accommodating groove (506). A threaded hole (511) is provided, and the locking threaded column (510) is threadedly matched with the threaded hole (511). One end of the locking threaded column (510) located inside the accommodating groove (506) is fixedly sleeved with a locking gear (512). A driving shaft (513) is movably sleeved on the inner wall of one side of the accommodating groove (506). The other end of the driving shaft (513) is fixedly connected with an inner hexagonal sleeve (514). A positioning hole (515) is provided on the end surface of the protruding plate (505). The inner hexagonal sleeve (514) is slidably inserted into the positioning hole (515). A tool insertion hole (516) is provided on the end surface of the elastic strip (502). The tool insertion hole (516) is aligned with the positioning hole (515). A spiral worm gear (517) is fixedly installed on the outside of the driving shaft (513). The spiral worm gear (517) is meshed with the locking gear (512) for transmission.

10. The assembled steel pipe sheet pile foundation pit support structure according to claim 9, characterized in that: The basic retaining bar (401) has a rectangular cavity (404) on one end surface, and a displacement sliding hole (405) is provided on the inner side surface of the basic inserting bar (403). The displacement sliding hole (405) is connected to the rectangular cavity (404). A sliding inserting bar (406) is slidably inserted into the interior of the rectangular cavity (404). A linkage strip (407) is fixedly connected to one surface of the sliding inserting bar (406). The linkage strip (407) is slidably inserted into the displacement sliding hole (40 5) A water channel is formed inside and between the two, the threaded hole (511) is opened on the linkage strip (407), and a filling chamber (408) is formed between the surface of the sliding insert (406) located on one side of the linkage strip (407) and the inner wall of the rectangular cavity (404), and the filling chamber (408) is filled with water-absorbing and swelling material, and one end of the basic baffle (401) is provided with a positive slope, and the other end of the basic baffle (401) is provided with a negative slope.

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