A composite steel sheet pile with a two-way interlocking joint

Abstract

This invention provides a combined sheet pile with bidirectional interlocking, belonging to the field of sheet pile technology. It includes a sheet pile composed of a steel plate and two steel flanges integrally formed on the two outer walls of the steel plate. The steel flanges are mirror-shaped and form an angle with the steel plate. An interlocking portion is provided on the outer wall of the steel flange away from the steel flange, near one end. The interlocking portion has a locking notch for engagement. A steel extension plate is welded to the outer wall of the steel flange adjacent to the interlocking portion. This invention significantly improves the contact area and shear strength of adjacent sheet piles through the double interlocking structure, effectively preventing misalignment or leakage in high water pressure or complex strata. Even if one interlocking structure is damaged, the other can still maintain connection, ensuring the stability, firmness, and sealing of the assembled sheet piles.

Description

Technical Field

[0001] This invention belongs to the field of sheet pile technology, specifically relating to a combined sheet pile with a bidirectional interlocking joint. Background Technology

[0002] Steel sheet piles are interlocking steel structural members that interlock to form a continuous retaining or water-retaining wall. They are widely used in foundation pit support, cofferdams, wharf revetments, and other projects. They are efficient to construct, reusable, and have advantages such as high strength, good water-stopping properties, and environmental friendliness. Steel sheet piles mainly consist of interlocking steel structural members, a continuous wall formed by their connection, and a matching support or anchoring system. The core of the system is that the interlocking joints of individual steel sheet piles form a continuous retaining or water-retaining structure. They are widely used in foundation pit support, water conservancy projects, and temporary cofferdams.

[0003] When existing sheet piles interlock, they are subjected to significant earth pressure. The interlocking points of adjacent sheet piles experience considerable pressure, which causes the hooks at the interlocking points to deform and flatten. This not only gradually reduces the stability of the assembled sheet piles but also creates large gaps at the joints of adjacent sheet piles, making them prone to earth seepage and affecting the sealing of the assembled sheet piles.

[0004] Therefore, a combined steel sheet pile with a two-way interlocking joint is proposed. Summary of the Invention

[0005] The present invention provides a combined steel sheet pile with a two-way interlocking joint, the purpose of which is to solve the problems mentioned above.

[0006] This invention provides a combined sheet pile with a bidirectional locking mechanism, comprising a sheet pile, wherein the sheet pile is composed of a steel plate and two steel flanges integrally formed on the two outer side walls of the steel plate. The steel flanges are mirror-shaped and form an angle with the steel plate. A locking portion is provided on the outer wall of the steel flange away from the steel flange, near one end. The locking portion has a locking notch for engagement. A steel extension plate is welded to the outer wall of the steel flange adjacent to the locking portion. A support platform is provided on the outer wall of the steel extension plate near the locking portion. An outer circular sleeve is provided on one side of the outer wall of the support platform 1. A notch is opened on the outer circumferential surface of the outer circular sleeve away from the support platform 1. Five vertical plates are distributed circumferentially on the inner circumferential surface of the outer circular sleeve. An arc-shaped platform is provided on the side wall of the vertical plates away from the outer circular sleeve. A locking part 2 and a support platform 2 are provided on the outer wall of the steel wing plate 2 away from the steel wing plate 1. The locking part 2 is located on one side of the support platform 2 and has a locking opening 2 for engagement. An inner cylinder is provided on the outer wall of the support platform 2 away from the steel wing plate 2. Five vertical plate grooves are opened circumferentially on the outer circumferential surface of the inner cylinder. An arc-shaped platform groove is opened on the inner side of the inner cylinder near the vertical plate groove.

[0007] Furthermore, a groove is provided on the outer circumferential surface of the inner cylinder near the circumferential side of the vertical plate groove, and a water-swellable water-stop strip is provided on the inner side wall of the groove. The arc-shaped groove and the arc-shaped platform are inserted into each other, and the vertical plate and the vertical plate groove are inserted into each other.

[0008] The top and bottom of the locking part one are provided with a pulling groove one and a through groove one, with the pulling groove one located on one side of the through groove one. The top and bottom of the locking part two are provided with a pulling groove three and a through groove two, with the pulling groove three located on one side of the through groove two. The top and bottom of the steel wing plate one are provided with a pulling groove two, and the top and bottom of the steel wing plate two are provided with a pulling groove four. The bottom of the pulling groove one, pulling groove two, pulling groove three, and pulling groove four are all provided with threaded holes. Pulling steel plates are embedded in the interior of the pulling groove one and pulling groove two, and the interior of the pulling groove three and pulling groove four. A fastening hole is provided at the top of the pulling steel plate near the threaded hole. A fastening screw passes through the fastening hole and is screwed into the threaded hole.

[0009] Furthermore, a reinforcing steel plate is bolted to the center of one side of the outer wall of the steel plate near the position between steel wing plate one and steel wing plate two. An inclined steel plate one is provided between steel wing plate one and steel wing plate two and the reinforcing steel plate. An inclined steel plate two is provided between inclined steel plate one and the reinforcing steel plate. An inclined steel plate three is provided between inclined steel plate two and the reinforcing steel plate.

[0010] Furthermore, a supporting steel plate is provided at the center of the outer wall on the other side of the steel plate, and a horizontal support plate is provided on the outer wall of the supporting steel plate away from the steel plate. A vertically arranged triangular rib is provided between the bottom of the horizontal support plate and the outer wall of the supporting steel plate.

[0011] Furthermore, the cross-sections of the locking portion one and the locking portion two are U-shaped, and the locking portion one on the steel wing plate one and the locking portion two on the steel wing plate two of the two adjacent steel sheet piles interlock with each other; By adopting the above technical solution, the interlocking structure formed by the "U"-shaped locking part one and locking part two is more stable and firm when they are engaged. By using the interlocking and interlocking of locking part one and locking part two, adjacent sheet piles can be connected in combination. With the combination of multiple sheet piles, a continuous retaining or water-retaining structure can be formed, which is convenient for application in foundation pit support, water conservancy projects and temporary cofferdams.

[0012] Furthermore, the inner diameter of the arc-shaped groove is greater than the inner width of the vertical plate groove, and the arc-shaped groove and the vertical plate groove are connected. By adopting the above technical solution, and utilizing the difference in size between the arc-shaped platform groove and the vertical plate groove, when the arc-shaped platform and the vertical plate are respectively inserted into the arc-shaped platform groove and the vertical plate groove, a limiting force-bearing structure can be formed. This structure can withstand the tensile force between steel wing plate one and steel wing plate two in multiple directions, ensuring the stable and firm connection between adjacent steel wing plate one and steel wing plate two. It also forms a double-locking structure with the interlocking structure of locking part one and locking part two. The two interlocking surfaces significantly improve the contact area and shear strength, effectively preventing misalignment or leakage in high water pressure or complex strata. Even if one locking structure is damaged, the other can still maintain the connection.

[0013] Furthermore, the inclined steel plate 2 and inclined steel plate 3 together with the reinforcing steel plate form a triangular support structure, the inclined steel plate 2 and inclined steel plate 1 together with the reinforcing steel plate form a triangular support structure, and the steel wing plate 1 and steel wing plate 2 together with the inclined steel plate 1 and the steel sheet piles all form a triangular support structure; By adopting the above technical solution and utilizing the formation of multiple sets of interdependent triangular support structures, the traction capacity of the steel plate on steel wing plate one and steel wing plate two can be improved, preventing steel wing plate one and steel wing plate two from expanding under the action of earth pressure, thereby ensuring the firmness and sealing of the joint of steel wing plate one and steel wing plate two.

[0014] The beneficial effects of this invention are as follows: 1. This invention, through the mutual cooperation of the outer sleeve and the inner cylinder, can set another locking structure on the horizontal side where the locking joint one and the locking joint two interlock. By setting multiple sets of arc platforms and arc platform grooves, a tighter and more solid locking structure can be formed, and the compressive force on the interlocking point of the locking joint one and the locking joint two can be distributed. The double locking structure significantly improves the contact area and shear strength of adjacent sheet piles, effectively preventing misalignment or leakage in high water pressure or complex strata. Even if one locking structure is damaged, the other can still maintain the connection, ensuring the stability, firmness and sealing of the assembled sheet pile 1.

[0015] 2. The present invention connects the first lock portion and the first steel wing plate with the second lock portion and the second steel wing plate by pulling the steel plate, thereby strengthening the traction of the hook portion of the first lock portion and the second lock portion, thus avoiding the deformation of the hook portion under pressure, and ensuring the stability and firmness of the interlocking of the first lock portion and the second lock portion.

[0016] 3. Through the coordinated cooperation of inclined steel plate one, inclined steel plate two, and inclined steel plate three, the present invention can form multiple sets of mutually dependent triangular support structures, which can improve the traction capacity of the steel plates on steel wing plate one and steel wing plate two, prevent steel wing plate one and steel wing plate two from expanding under the action of earth pressure, and thus ensure the firmness and sealing of the combined connection of steel wing plate one and steel wing plate two.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the description and the drawings. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of adjacent sheet pile combinations according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a steel sheet pile structure according to an embodiment of the present invention (with the reinforcing steel sheet exposed). Figure 3 This is a schematic diagram of a steel sheet pile structure according to an embodiment of the present invention (with the supporting steel sheet exposed). Figure 4 This is a partial structural diagram of an adjacent sheet pile combination according to an embodiment of the present invention; Figure 5 This is an embodiment of the present invention. Figure 4 Enlarged diagram of point C in the diagram; Figure 6 This is an embodiment of the present invention. Figure 2 Enlarged diagram of point A in the diagram; Figure 7 This is an embodiment of the present invention. Figure 3 Enlarged diagram of point B in the diagram; Figure 8 This is a schematic diagram of the reinforced steel plate structure according to an embodiment of the present invention; Reference numerals: 1. Sheet pile; 11. Steel plate; 12. Steel wing plate one; 121. Interlock part one; 1211. Interlock one; 1212. Pulling groove one; 1213. Through groove one; 122. Steel extension plate; 123. Support platform one; 124. Outer sleeve; 1241. Notch; 1242. Vertical plate; 1243. Circular arc platform; 125. Pulling groove two; 1251. Threaded hole; 13. Steel wing plate two; 131. Interlock part two; 1311. Interlock two; 1 312. Pulling groove three; 1313. Through groove two; 132. Support platform two; 133. Inner cylinder; 1331. Vertical plate groove; 1332. Arc platform groove; 1333. Groove; 1334. Water-swellable waterstop strip; 134. Pulling groove four; 14. Pulling steel plate; 141. Fastening hole; 15. Fastening screw; 16. Reinforcing steel plate; 161. Inclined steel plate one; 162. Inclined steel plate two; 163. Inclined steel plate three; 17. Supporting steel plate; 171. Horizontal support plate. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] Example 1 Reference Figure 1-7This invention proposes a combined sheet pile with a bidirectional locking mechanism, comprising a sheet pile 1. The sheet pile 1 consists of a steel plate 11 and steel wing plates 12 and 13 integrally formed on the two outer side walls of the steel plate 11. The steel wing plates 12 and 13 are mirror-shaped and form a 95-degree angle with the steel plate 11. A locking part 121 is provided on the outer side of the steel wing plate 12 away from the steel wing plate 13, near one end. The locking part 121 has a locking slot 1211 for engagement. A steel extension plate 122 is welded to the outer wall of the wing plate 12 adjacent to the lock opening part 121. A support platform 123 is provided on the outer wall of the steel extension plate 122 near the lock opening part 121. An outer sleeve 124 is provided on the outer wall of the support platform 123. A notch 1241 is opened on the outer circumferential surface of the outer sleeve 124 away from the support platform 123. Five vertical plates 1242 are distributed circumferentially on the inner circumferential surface of the outer sleeve 124. An arc platform 1243 is provided on the side wall of the vertical plate 1242 away from the outer sleeve 124. On the outer wall of steel wing plate 2 13 away from steel wing plate 1 12, there is a locking part 2 131 and a support platform 2 132. The locking part 2 131 is located on one side of the support platform 2 132, and the locking part 2 131 has a locking slot 2 1311 for interlocking. The cross-section of the locking part 1 121 and the locking part 2 131 is "U" shaped. The locking slots 1 1211 on steel wing plate 12 and the locking slots 2 1311 on steel wing plate 2 13 of two adjacent steel sheet piles 1 interlock with each other. The "U" shaped locking part 1 121 and locking part 2 131 make the interlocking structure more stable and firm when they interlock. 21 and the second interlocking part 131 are inserted and engaged. Through the interlocking of the first interlocking part 1211 and the second interlocking part 1311 in two adjacent sheet piles 1, the adjacent sheet piles 1 are connected in combination. With the combination of multiple sheet piles 1, a continuous retaining or water-retaining structure can be formed, which is convenient for application in foundation pit support, water conservancy projects and temporary cofferdams. An inner cylinder 133 is provided on the outer wall of the support platform 2 132 away from the steel wing plate 2 13. Five vertical plate grooves 1331 are opened circumferentially on the outer circumferential surface of the inner cylinder 133, and an arc-shaped platform groove 1332 is opened on the side of the inner cylinder 133 near the vertical plate grooves 1331. A groove 1333 is formed on the outer circumferential surface of the inner cylinder 133 near the vertical plate groove 1331. A water-swellable sealing strip 1334 is provided on the inner side wall of the groove 1333. The water-swellable sealing strip 1334 expands by 300% after contact with water, forming a dynamic sealing layer, which greatly improves the water-stopping performance. The arc-shaped groove 1332 and the arc-shaped platform 1243 are inserted and matched, and the vertical plate 1242 and the vertical plate groove 1331 are inserted and matched. The inner diameter of the arc-shaped groove 1332 is larger than the inner width of the vertical plate groove 1331, and the arc-shaped groove 1332 and the vertical plate groove 1331 are connected. The difference in size 331 allows for the formation of a limiting force-bearing structure when the arc platform 1243 and the vertical plate 1242 are inserted into the arc platform groove 1332 and the vertical plate groove 1331, respectively. This structure can withstand the tensile force between the steel wing plate 12 and the steel wing plate 13 in multiple directions, ensuring a stable and firm connection between adjacent steel wing plates 12 and 13. It also forms a double-locking structure with the interlocking structure of the locking part 121 and the locking part 131. The double-locking structure significantly improves the contact area and shear strength, effectively preventing misalignment or leakage in high water pressure or complex strata. Even if one locking structure is damaged, the other can still maintain the connection. To ensure the stability and sealing of the connection between adjacent sheet piles 1, in this embodiment, through the cooperation of the outer sleeve 124 and the inner cylinder 133, an additional locking structure can be set on the horizontal side where the interlocking structure of the first locking joint 1211 and the second locking joint 131 is formed. By setting multiple sets of arc-shaped platforms 1243 and arc-shaped platform grooves 1332, a tighter and more robust locking structure can be formed, sharing the compressive force at the interlocking point of the first locking joint 1211 and the second locking joint 131. The double locking structure significantly increases the contact area and shear strength of adjacent sheet piles 1, effectively preventing misalignment or leakage in high water pressure or complex strata. Even if one locking structure is damaged, the other can still maintain the connection, ensuring the stability, robustness, and sealing of the assembled sheet piles 1. Specifically, when assembling adjacent sheet piles 1, the locking joint on one of the sheet piles 1... A locking part 121 is vertically inserted into the locking part 131 on another sheet pile 1. The locking parts 121 and 1311 engage together, forming a locking structure. As the steel wing plates 12 and 13 move relative to each other, the outer sleeve 124 is fitted around the outer circumference of the inner cylinder 133, the vertical plate 1242 is vertically inserted into the vertical plate groove 1331, and the arc platform 1243 is vertically inserted into the arc platform groove 1332. The outer sleeve 124 and the inner cylinder 133 form another locking structure, completing the combined connection of adjacent sheet piles 1. When the sheet pile 1 is subjected to earth pressure, the locking structure in the outer channel (i.e., the locking structure formed by the outer sleeve 124 and the inner cylinder 133) is first subjected to the tensile force caused by the two sheet piles 1 moving away from each other, ensuring the stability and firmness of the locking structure formed by the locking parts 121 and 131.

[0021] Example 2 Reference Figure 2-7 Based on Embodiment 1, this embodiment of the invention further proposes that the top and bottom of the locking portion 121 are provided with a pull groove 1212 and a through groove 1213, with the pull groove 1212 located on one side of the through groove 1213; the top and bottom of the locking portion 131 are provided with a pull groove 312 and a through groove 21313, with the pull groove 312 located on one side of the through groove 21313; the top and bottom of the steel wing plate 12 are provided with a pull groove 225; and the top and bottom of the steel wing plate 13 are provided with a pull groove 4. 134. Threaded holes 1251 are opened at the bottom of the interior of traction groove 1212, traction groove 2 125, traction groove 3 1312 and traction groove 4 134. Traction steel plates 14 are embedded in the interior of traction groove 1212 and traction groove 2 125, as well as the interior of traction groove 3 1312 and traction groove 4 134. Fastening holes 141 are opened at the top of traction steel plates 14, near the threaded holes 1251. Fastening screws 15 pass through the interior of fastening holes 141 and are screwed into threaded holes 1251. To prevent the first interlocking part 121 and the second interlocking part 131 from being straightened under the pressure of the earthwork, in this embodiment, the first interlocking part 121 and the first steel wing plate 12 are connected to the second interlocking part 131 and the second steel wing plate 13 by the traction steel plate 14. This strengthens the traction on the hooks of the first interlocking part 121 and the second interlocking part 131, thereby preventing the hooks from deforming under pressure and ensuring the stability and firmness of the interlocking parts 1211 and 1311. Specifically, when adjacent sheet piles 1 are combined together, the first interlocking part 121 and the second interlocking part 1311 on the first interlocking part 121 are interlocked together. At this time, the two pulling steel plates 14 are vertically inserted into the interiors of the second pulling groove 125 and the first pulling groove 1212, as well as the interiors of the third pulling groove 1312 and the fourth pulling groove 134, respectively. The threaded hole 1251 and the fastening hole 141 coincide in the vertical direction. After the fastening screw 15 passes through the fastening hole 141, it is screwed into the threaded hole 1251. The pulling steel plates 14 connect the second steel wing plate 13 with the hook on the second locking part 131, and connect the first steel wing plate 12 with the hook on the first locking part 121. The pulling steel plates 14 are used to strengthen the traction on the hook of the first locking part 121 and the second locking part 131, thereby preventing the hook from deforming under pressure.

[0022] Example 3 Reference Figure 1-3 and Figure 8 Based on Embodiment 1, this embodiment of the invention also proposes... A reinforcing steel plate 16 is bolted to the center of one side of the outer wall of steel plate 11, near the position between steel wing plate 12 and steel wing plate 13. An inclined steel plate 161 is provided between steel wing plate 12 and steel wing plate 13 and the reinforcing steel plate 16. An inclined steel plate 162 is provided between inclined steel plate 161 and the reinforcing steel plate 16. An inclined steel plate 163 is provided between inclined steel plate 162 and the reinforcing steel plate 16. Inclined steel plates 162 and 163, together with the reinforcing steel plate 16, form a triangular support structure. Similarly, inclined steel plates 162 and 161, together with the reinforcing steel plate 16, form a triangular support structure. Both the inclined steel plate 161 and the sheet pile 1 constitute a triangular support structure. By forming multiple sets of mutually dependent triangular support structures, the traction capacity of the steel plate 11 on the steel wing plate 12 and the steel wing plate 23 can be improved, and the expansion of the steel wing plate 12 and the steel wing plate 23 under the action of earth pressure can be avoided, thereby ensuring the firmness and sealing of the connection between the steel wing plate 12 and the steel wing plate 23. A supporting steel plate 17 is provided at the center of the outer wall on the other side of the steel plate 11. A horizontal support plate 171 is provided on the outer wall of the supporting steel plate 17 away from the steel plate 11. A vertically arranged triangular rib is provided between the bottom of the horizontal support plate 171 and the outer wall of the supporting steel plate 17. To improve the overall structural strength of the sheet pile 1, in this embodiment, the coordinated operation of inclined steel plate 161, inclined steel plate 162, and inclined steel plate 163 forms multiple sets of mutually dependent triangular support structures. This enhances the traction capacity of the steel plate 11 on the steel flange 12 and steel flange 13, preventing the expansion of the steel flange 12 and steel flange 13 under earth pressure. This ensures the firmness and sealing of the connection between the steel flange 12 and steel flange 13. Specifically, when the steel flange 12 and steel flange 13... When sheet pile 11 moves and expands in the opposite direction after being subjected to the pressure of the earthwork, since one side of each of the two inclined steel plates 161 is connected to the outer edge of the steel wing plate 12 and the steel wing plate 13 respectively, the traction of the inclined steel plates 161 ensures the stability of the connection between the steel wing plate 12 and the steel wing plate 13 and the steel plate 11, preventing the included angle from increasing. The inclined steel plates 162 and 163 are used to share the outward expansion force on the steel wing plate 12 and the steel wing plate 13 in turn, ensuring the stability and firmness of the steel sheet pile 1 structure.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A combined sheet pile with a bidirectional interlocking joint, comprising a sheet pile (1), wherein the sheet pile (1) is composed of a steel plate (11) and two steel wing plates (12 and 13) integrally formed on the two outer side walls of the steel plate (11), wherein the first steel wing plate (12) and the second steel wing plate (13) are mirror-shaped, and the first steel wing plate (12) and the second steel wing plate (13) are both at a 95-degree angle to the steel plate (11), characterized in that: A locking portion 1 (121) is provided on the outer wall of the steel wing plate 1 (12) away from the steel wing plate 2 (13) and near one end. The locking portion 1 (121) has a locking slot 1 (1211) for engagement. A steel extension plate (122) is welded to the outer wall of the steel wing plate 1 (121) adjacent to the locking portion 1 (121). On the outer wall of the steel extension plate (122) near the locking portion 1 (121) on one side... A support platform (123) is provided at the location. An outer circular sleeve (124) is provided on one side of the outer wall of the support platform (123). A notch (1241) is opened on the outer circumferential surface of the outer circular sleeve (124) away from the support platform (123). Five vertical plates (1242) are distributed circumferentially on the inner circumferential surface of the outer circular sleeve (124). An arc platform (1243) is provided on the side wall of the vertical plate (1242) away from the outer circular sleeve (124). On the outer wall of the steel wing plate two (13) away from the steel wing plate one (12), there is a locking part two (131) and a support platform two (132). The locking part two (131) is located on one side of the support platform two (132), and a locking part two (1311) for engaging is provided on the locking part two (131). On the outer wall of the support platform two (132) away from the steel wing plate two (13), there is an inner cylinder (133). Five vertical plate grooves (1331) are circumferentially opened on the outer circumferential surface of the inner cylinder (133), and an arc-shaped platform groove (1332) is opened on the side of the inner cylinder (133) near the vertical plate grooves (1331).

2. A combined steel sheet pile with a bidirectional interlocking joint according to claim 1, characterized in that: A groove (1333) is provided on the outer circumferential surface of the inner cylinder (133) near the vertical plate groove (1331). A water-swellable waterstop strip (1334) is provided on the inner side wall of the groove (1333). The arc-shaped platform groove (1332) and the arc-shaped platform (1243) are inserted and matched. The vertical plate (1242) and the vertical plate groove (1331) are inserted and matched.

3. A combined steel sheet pile with a bidirectional interlocking joint according to claim 1, characterized in that: The top and bottom of the first locking part (121) are provided with a first pulling groove (1212) and a first through groove (1213), the first pulling groove (1212) being located on one side of the first through groove (1213). The top and bottom of the second locking part (131) are provided with a third pulling groove (1312) and a second through groove (1313), the third pulling groove (1312) being located on one side of the second through groove (1313). The top and bottom of the first steel wing plate (12) are provided with a second pulling groove (125). The top and bottom of the second steel wing plate (13) are provided with a fourth pulling groove (134). The first pulling groove (1212) is provided with a third pulling groove (1212) and a second through groove (1213). 212) The bottom of the inner part of the second (125), third (1312) and fourth (134) of the traction groove is provided with threaded holes (1251). The inner parts of the first (1212) and second (125) of the traction groove, as well as the inner parts of the third (1312) and fourth (134) of the traction groove, are provided with traction steel plates (14). The top of the traction steel plate (14) is provided with a fastening hole (141) at a position directly above the threaded hole (1251). A fastening screw (15) passes through the inside of the fastening hole (141). The fastening screw (15) and the threaded hole (1251) are screwed together.

4. A combined steel sheet pile with a bidirectional interlocking joint according to claim 1, characterized in that: A reinforcing steel plate (16) is bolted to the center of one side of the outer wall of the steel plate (11) near the position between the first steel wing plate (12) and the second steel wing plate (13). An inclined steel plate (161) is provided between the first steel wing plate (12) and the second steel wing plate (13) and the reinforcing steel plate (16). An inclined steel plate (162) is provided between the first inclined steel plate (161) and the reinforcing steel plate (16). An inclined steel plate (163) is provided between the second inclined steel plate (162) and the reinforcing steel plate (16).

5. A combined steel sheet pile with a bidirectional interlocking joint according to claim 1, characterized in that: A supporting steel plate (17) is provided at the center of the outer wall of the other side of the steel plate (11). A horizontal support plate (171) is provided on the outer wall of the supporting steel plate (17) away from the steel plate (11). A vertically arranged triangular rib is provided between the bottom of the horizontal support plate (171) and the outer wall of the supporting steel plate (17).

6. A combined steel sheet pile with a bidirectional interlocking joint according to claim 1, characterized in that: The cross-sections of the locking part one (121) and the locking part two (131) are U-shaped, and the locking part one (1211) on the steel wing plate one (12) and the locking part two (1311) on the steel wing plate two (13) of the two adjacent steel sheet piles (1) interlock with each other.

7. A combined steel sheet pile with a bidirectional interlocking joint according to claim 1, characterized in that: The inner diameter of the arc-shaped groove (1332) is greater than the inner width of the vertical plate groove (1331), and the arc-shaped groove (1332) and the vertical plate groove (1331) are connected.

8. A combined steel sheet pile with a bidirectional interlocking joint according to claim 4, characterized in that: The inclined steel plate two (162) and the inclined steel plate three (163) together with the reinforcing steel plate (16) form a triangular support structure. The inclined steel plate two (162) and the inclined steel plate one (161) together with the reinforcing steel plate (16) form a triangular support structure. The steel wing plate one (12) and the steel wing plate two (13) together with the inclined steel plate one (161) and the steel sheet pile (1) all form a triangular support structure.

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