Multi-surface contact water stop lock catch steel sheet pile and machining method

Abstract

The invention provides a multi-surface contact water stop lock catch steel sheet pile and a machining method. The multi-surface contact water stop lock catch steel sheet pile comprises a sheet pile body, a first lock catch and a second lock catch. The first lock catch is installed at the first end of the sheet pile body, and a connecting space is formed in the first lock catch. The second lock catch is installed at the second end of the sheet pile body, the side, facing the sheet pile body, of the second lock catch is provided with a clamping part, and the clamping part enters the connecting space through a clamping channel of the adjacent sheet pile body. According to the multi-face contact water stop lock catch steel sheet pile, the first lock catch and the second lock catch are arranged at the two ends of the sheet pile body correspondingly, a connecting space and a clamping channel in the first lock catch are utilized, curved surface point-surface contact of a traditional steel sheet pile is replaced with multi-set plane contact, and a multi-sealing water stop structure is constructed by means of face-to-face tight attachment; the problem that the lock catch is poor in water stopping effect is solved fundamentally.

Description

Technical Field

[0001] This application belongs to the field of sheet pile technology, specifically relating to a multi-faceted contact water-stopping interlocking sheet pile and its processing method. Background Technology

[0002] Sheet piles are a type of underwater support structure formed by the continuous and tight interlocking of the interlocking points on both sides of the sheet pile. Sheet piles have advantages such as high strength, good waterproof performance, various shapes, deep-water construction and reusability. They are often used in the fields of building foundation pits, tunnels, slopes, docks, wharves, river embankments, and bridge pier cofferdams.

[0003] Traditional sheet pile interlocking designs prioritize connection reliability and ease of construction, with secondary considerations for water blocking and soil retention. Currently, most of the interlocking surfaces are curved, which cannot fully fit together during contact, resulting in discontinuous point-to-surface contact. Due to repeated insertion and removal during construction, stress concentration occurs between the points and surfaces, easily causing scratches and damage to the interlocking and reducing its actual service life. The connection reliability and water blocking performance of the interlocking decrease significantly with increasing length and frequency of use, and in severe cases, disengagement can occur, affecting the normal operation of the sheet pile. Summary of the Invention

[0004] This application provides a multi-faceted contact water-stopping locking steel sheet pile and its processing method, aiming to solve the technical problem that the existing steel sheet piles have point-to-surface contact, resulting in poor sealing effect, performance degradation after long-term use, and even the occurrence of hooking off.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows: Firstly, a multi-faceted contact water-stopping interlocking steel sheet pile is provided, comprising: sheet pile body; A first locking buckle is installed at the first end of the sheet pile body. A connecting space is formed inside the first locking buckle, and a snap-fit ​​channel is formed towards the second end of the sheet pile body. The connecting space has a first contact surface, a second contact surface, and a third contact surface arranged sequentially. The second latch is installed at the second end of the sheet pile body. The second latch has a snap-fit ​​part on the side facing the sheet pile body. The snap-fit ​​part enters the connection space through the snap-fit ​​channel of the adjacent sheet pile body. The snap-fit ​​portion is in sealed contact with at least two of the first contact surface, the second contact surface, and the third contact surface to form at least two sealing and waterproofing structures.

[0006] In conjunction with the first aspect, in one possible implementation, the first latch includes a first mounting plate, a first transition plate, and a first connecting plate connected in sequence; The first mounting plate is connected to the first end of the sheet pile body; the first connecting plate is parallel to the first mounting plate; the surface of the first transition plate is perpendicular to the first mounting plate and the first connecting plate respectively; A mating block is installed on the end of the first connecting plate facing the first mounting plate; The first mounting plate, the first transition plate, the first connecting plate, and the docking block enclose the connection space, and the snap-fit ​​channel is formed between the first mounting plate and the docking block; The first contact surface is formed on the inner side of the first mounting plate, the second contact surface is formed on the inner side of the first transition plate, and the third contact surface is formed on the inner side of the mating block.

[0007] In conjunction with the first aspect, in one possible implementation, the snap-fit ​​portion includes a second connecting plate and a snap-fit ​​connector, and the second latch further includes a second mounting plate and a second transition plate, wherein the second mounting plate, the second transition plate and the second connecting plate are connected in sequence, and the snap-fit ​​connector is installed on the side of the second connecting plate facing the second mounting plate; The second mounting plate is connected to the second end of the sheet pile body; the second connecting plate is parallel to the second mounting plate; the surface of the second transition plate is perpendicular to the second mounting plate and the second connecting plate respectively; A fourth contact surface is formed on the outer side of the second connecting plate, a fifth contact surface is formed on the outer side of the snap-fit ​​connector, and a sixth contact surface is formed on the inner side of the snap-fit ​​connector; The fourth contact surface can seal against the first contact surface, the fifth contact surface can seal against the second contact surface, and the sixth contact surface can seal against the third contact surface.

[0008] In conjunction with the first aspect, in one possible implementation, a first abutting surface is formed on the outer side of the docking block, and a second abutting surface is formed on the outer side of the first connecting plate; The inner side of the second transition plate forms a third abutment surface that is adapted to the first abutment surface, and the inner side of the second mounting plate forms a fourth abutment surface that is adapted to the second abutment surface; the first abutment surface can be sealed and fitted with the third abutment surface, and the second abutment surface can be sealed and fitted with the fourth abutment surface; When the snap-fit ​​part is engaged with the connecting space, there are two to four sets of sealing and water-stopping structures between the first contact surface and the fourth contact surface, the second contact surface and the fifth contact surface, the third contact surface and the sixth contact surface, the first abutting surface and the third abutting surface, and the second abutting surface and the fourth abutting surface.

[0009] In conjunction with the first aspect, in one possible implementation, the cross-sectional area of ​​the connecting block in the thickness direction of the sheet pile body gradually increases along the direction closer to the second end; The third contact surface is set at an angle to both the first contact surface and the second contact surface.

[0010] In conjunction with the first aspect, in one possible implementation, the cross-sectional area of ​​the snap-fit ​​connector in the thickness direction of the sheet pile body gradually increases in the direction close to the first end, so that the sixth contact surface is parallel to the third contact surface.

[0011] In conjunction with the first aspect, in one possible implementation, the spacing of the snap-fit ​​channels in the thickness direction of the sheet pile body is smaller than the spacing of the connecting spaces in the thickness direction of the sheet pile body.

[0012] In conjunction with the first aspect, in one possible implementation, the first mounting plate, the first transition plate, the first connecting plate, and the docking block are integrally formed; The second mounting plate, the second transition block, the second connecting plate, and the snap connector are integrally formed.

[0013] The multi-faceted contact water-stopping interlocking sheet pile provided in this application, compared with the prior art, by setting a first interlock and a second interlock at each end of the sheet pile body, and utilizing the connecting space and snap-fit ​​channel within the first interlock, allows the snap-fit ​​portion of the second interlock of adjacent sheet piles to be precisely embedded and form a sealed abutment with at least two of the first contact surfaces, second contact surfaces, and third contact surfaces of the first interlock. By replacing the curved point-to-surface contact of traditional sheet piles with multiple sets of planar contacts, a multi-layered sealing water-stopping structure is constructed through the tight fit between surfaces, fundamentally solving the problem of poor water-stopping effect of the interlock. At least two sets of sealing water-stopping structures form a tight water-stopping band, meeting the complete water-stopping requirements in engineering design without the need for additional water-blocking materials or welding seals. Planar contact replaces discontinuous point-to-surface contact; repeated insertion and removal during construction will not cause stress concentration, avoiding damage to the interlock by cutting or scratching. Even with repeated use, the integrity of the interlock remains, and the water-blocking and soil-retaining functions do not significantly diminish. The multi-faceted interlocking mechanism makes the locking connection more secure, effectively reducing the risk of disengagement when the construction depth increases, and can adapt to the needs of deeper projects.

[0014] Secondly, a method for processing multi-faceted contact water-stopping interlocking steel sheet piles is provided for manufacturing multi-faceted contact water-stopping interlocking steel sheet piles as described in any of the possible implementations above, comprising the following steps: S1: The first end of the sheet pile body is rolled and hot-formed to bend the first end and create the first contact surface; S2: The first end is thermoformed by rolling to create the second contact surface; S3: Continue to perform guide thermoforming on the first end, so that the first end is bent; S4: Perform guide thermoforming on the first bent end again to form the third contact surface and process the first latch; S5: Repeat steps S1 to S4 on the second end of the sheet pile body, but in the opposite direction, to form a second locking mechanism.

[0015] In conjunction with the first aspect, in one possible implementation, step S3, "re-performing the bent first end with guide thermoforming," specifically includes: The first bent end is thermoformed using upper and lower guides to form a semi-formed lock. Step S4, "re-performing the first bent end with a guide thermoforming", specifically includes: The semi-formed buckle is thermoformed using upper and lower guides to produce the finished buckle.

[0016] The multi-faceted contact water-stopping interlocking sheet pile processing method provided in this application, compared with the prior art, sets a first interlock and a second interlock at each end of the sheet pile body. Utilizing the connecting space and snap-fit ​​channel within the first interlock, the snap-fit ​​portion of the second interlock of adjacent sheet piles can be precisely embedded and form a sealed abutment with at least two of the first, second, and third contact surfaces of the first interlock. By replacing the curved point-to-surface contact of traditional sheet piles with multiple sets of planar contacts, a multi-layered sealing water-stopping structure is constructed through the tight fit between surfaces, fundamentally solving the problem of poor water-stopping effect of the interlock. At least two sets of sealing water-stopping structures form a tight water-stopping band, meeting the complete water-stopping requirements in engineering design without the need for additional water-blocking materials or welding seals. Planar contact replaces discontinuous point-to-surface contact; repeated insertion and removal during construction will not cause stress concentration, avoiding damage to the interlock by cutting or scratching. Even with repeated use, the integrity of the interlock remains, and the water-blocking and soil-retaining functions do not significantly diminish. The multi-faceted interlocking mechanism ensures a more secure connection, effectively reducing the risk of disengagement as construction depth increases and adapting to deeper engineering needs. Step-by-step processing allows for precise control of each forming step, gradually refining the angles, dimensions, and flatness of each structure to ensure accurate fit of multiple contact surfaces, guaranteeing reliable sealing across the multi-faceted contact. The more uniform plastic flow of the material during thermoforming avoids residual stress that may occur during cold working, reducing the risk of cracking in the first and second interlocking rings during use and ensuring stable performance of the sheet piles under complex construction conditions and long-term use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the main structure of a multi-faceted contact water-stopping interlocking steel sheet pile provided in an embodiment of this application; Figure 2 This is an assembly diagram showing the first and second latches being fastened together in an embodiment of this application; Figure 3 This is a schematic diagram of the structure of the first latch used in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the second latch used in the embodiments of this application; Figure 5 This is a side view of the first latch used in an embodiment of this application; Figure 6 This is a schematic diagram of the manufacturing process of the first latch used in the embodiments of this application. Figure 1 ; Figure 7 This is a schematic diagram of the manufacturing process of the first latch used in the embodiments of this application. Figure 2 ; Figure 8 This is a schematic diagram of the manufacturing process of the first latch used in the embodiments of this application. Figure 3 ; Figure 9 This is a schematic diagram of the manufacturing process of the first latch used in the embodiments of this application. Figure 4 ; Figure 10 This is a schematic diagram of a guide device for the first thermal conductive processing of the first latch used in an embodiment of this application. Figure 11 This is a schematic diagram of a guide device for performing a second thermal conductive process on the first latch used in an embodiment of this application.

[0019] Explanation of reference numerals in the attached figures: 1. Sheet pile main body; 2. First latch; 20. Snap-fit ​​channel; 21. First mounting plate; 211. First contact surface; 22. First transition plate; 221. Second contact surface; 23. First connecting plate; 231. Second abutting surface; 24. Butt block; 241. Third contact surface; 242. First abutting surface; 3. Second latch; 31. Second mounting plate; 311. Fourth abutment surface; 32. Second transition plate; 321. Third abutment surface; 33. Second connecting plate; 331. Fourth contact surface; 34. Snap connector; 341. Fifth contact surface; 342. Sixth contact surface; 4. Guide forming device; 41. Upper guide; 42. First lower guide; 43. Second lower guide. Detailed Implementation

[0020] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0021] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. The following description of at least one exemplary embodiment is actually illustrative only and is in no way intended to limit this application or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0023] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0024] It should be noted that the terms "length," "width," "height," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the application. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. Additionally, "multiple" and "several" mean two or more, unless otherwise explicitly specified.

[0026] Please refer to the following: Figures 1 to 11 This application describes the multi-faceted contact water-stopping interlocking steel sheet pile and its processing method. The multi-faceted contact water-stopping interlocking steel sheet pile includes a sheet pile body 1, a first interlock 2, and a second interlock 3. The first interlock 2 is installed at the first end of the sheet pile body 1, and a connecting space is formed inside the first interlock 2. A snap-fit ​​channel 20 is formed in the connecting space facing the second end of the sheet pile body 1. The connecting space has a first contact surface 211, a second contact surface 221, and a third contact surface 241 arranged sequentially. The second interlock 3 is installed at the second end of the sheet pile body 1. The second interlock 3 has a snap-fit ​​part on the side facing the sheet pile body 1. The snap-fit ​​part enters the connecting space through the snap-fit ​​channel 20 of the adjacent sheet pile body 1. The snap-fit ​​part is in sealed contact with at least two of the first contact surface 211, the second contact surface 221, and the third contact surface 241 to form at least two sealing water-stopping structures.

[0027] It should be noted that the first locking buckle 2 and the second locking buckle 3 have the same structure. The two adjacent sheet pile bodies 1 are arranged in opposite directions, and the first locking buckle 2 is engaged with the second locking buckle 3 of the adjacent sheet pile body 1.

[0028] It should be noted that in this embodiment, by setting a first locking buckle 2 and a second locking buckle 3 at both ends of the sheet pile body 1, and utilizing the connecting space and snap-fit ​​channel 20 within the first locking buckle 2, the snap-fit ​​portion of the second locking buckle 3 of adjacent steel sheet piles can be precisely embedded and form a sealed abutment with at least two of the first contact surface 211, the second contact surface 221, and the third contact surface 241 of the first locking buckle 2. By replacing the curved point-to-surface contact of traditional steel sheet piles with multiple sets of planar contacts, and by constructing a multi-layered sealing and water-stopping structure through the tight fit between the surfaces, the problem of poor water-stopping effect of the first locking buckle 2 and the second locking buckle 3 is fundamentally solved.

[0029] In practice, the sheet pile driving sequence is planned according to the project requirements to ensure that the positions of the first and second locking buckles 3 of adjacent sheet piles correspond. Sheet piles are driven to the design depth in sequence. During the driving process, a guide frame is used to assist in positioning so that the second locking buckle 3 of the next sheet pile is aligned with the first locking buckle 2 of the previous pile. The locking part of the second locking buckle 3 smoothly enters the connection space through the locking channel 20 of the first locking buckle 2. After the locking part is fully embedded, it automatically forms a sealed contact with at least two of the first contact surfaces 211, 221 and 241 of the first locking buckle 2, thus forming a retaining water-stopping structure.

[0030] The multi-faceted contact water-stopping interlocking sheet pile provided in this embodiment, compared with existing technologies, forms a tight water-stopping zone with at least two sets of sealing water-stopping structures. This eliminates the need for additional water-blocking materials or welding seals, thus meeting the complete water-stopping requirements in engineering design. Planar contact replaces discontinuous point-to-surface contact, preventing stress concentration from repeated insertion and removal during construction and avoiding damage to the interlocking mechanism. Even with repeated use, the integrity of the interlocking mechanism remains intact, and its water-blocking and soil-retaining functions do not significantly diminish. The multi-faceted interlocking method makes the interlocking connection more robust, effectively reducing the risk of disengagement as construction depth increases, and adapting to deeper engineering needs.

[0031] In some embodiments, see Figure 3 The first latch 2 includes a first mounting plate 21, a first transition plate 22, and a first connecting plate 23 connected in sequence; the first mounting plate 21 is connected to the first end of the sheet pile body 1; the first connecting plate 23 is parallel to the first mounting plate 21; the surface of the first transition plate 22 is perpendicular to the first mounting plate 21 and the first connecting plate 23 respectively; a mating block 24 is installed on the side end of the first connecting plate 23 facing the first mounting plate 21; the first mounting plate 21, the first transition plate 22, the first connecting plate 23, and the mating block 24 enclose a connecting space, and a snap-fit ​​channel 20 is formed between the first mounting plate 21 and the mating block 24; a first contact surface 211 is formed on the inner side of the first mounting plate 21, a second contact surface 221 is formed on the inner side of the first transition plate 22, and a third contact surface 241 is formed on the inner side of the mating block 24.

[0032] In this embodiment, the first latch 2 is sequentially connected by the first mounting plate 21, the first transition plate 22, the first connecting plate 23, and the mating block 24 to form a structurally stable connection space and a snap-fit ​​channel 20. The vertical and parallel relationships of each plate ensure the precise positioning of the first contact surface 211, the second contact surface 221, and the third contact surface 241, providing a structural basis for the sealing and abutment of the snap-fit ​​part of the second latch 3, and enabling the contact surfaces to form a uniformly stressed planar fit.

[0033] The first locking buckle 2 provided in this embodiment has excellent practicality and reliability. The high flatness and relative positional accuracy of the first contact surface 211, the second contact surface 221, and the third contact surface 241 ensure a complete fit between the locking part and the connection space, resulting in a more stable water-stopping effect. The one-piece molded enclosure structure enhances the overall strength of the first locking buckle 2, providing stronger resistance to deformation and enabling it to withstand insertion and extraction forces during construction and lateral pressure during engineering use, reducing the risk of buckle damage. The locking channel 20 guides the locking part to quickly and accurately embed, improving the efficiency of sheet pile driving. Simultaneously, the design of the connecting block 24 further optimizes the sealing of the connection space, reducing water seepage paths. The planar contact surface design reduces the difficulty of buckle processing, allowing for better control of dimensional accuracy during mass production, ensuring interchangeability between different sheet piles, and improving the product's versatility and reusability.

[0034] In some embodiments, see Figure 4 The snap-fit ​​part includes a second connecting plate 33 and a snap-fit ​​connector 34. The second latch 3 also includes a second mounting plate 31 and a second transition plate 32. The second mounting plate 31, the second transition plate 32 and the second connecting plate 33 are connected sequentially. The snap-fit ​​connector 34 is installed on the side of the second connecting plate 33 facing the second mounting plate 31. The second mounting plate 31 is connected to the second end of the sheet pile body 1. The second connecting plate 33 and the second mounting plate 31 are parallel to each other. The plate surface of the second transition plate 32 is perpendicular to the second mounting plate 31 and the second connecting plate 33 respectively. A fourth contact surface 331 is formed on the outer side of the second connecting plate 33, a fifth contact surface 341 is formed on the outer side of the snap-fit ​​connector 34, and a sixth contact surface 342 is formed on the inner side of the snap-fit ​​connector 34. The fourth contact surface 331 can seal against the first contact surface 211, the fifth contact surface 341 can seal against the second contact surface 221, and the sixth contact surface 342 can seal against the third contact surface 241.

[0035] It should be noted that the plate structure design of the second latch 3 and the first latch 2 allows the fourth contact surface 331, the fifth contact surface 341, and the sixth contact surface 342 of the snap-fit ​​part to precisely match the first contact surface 211, the second contact surface 221, and the third contact surface 241 of the first latch 2. Each contact surface is a planar design, ensuring a comprehensive and tight surface contact during snap-fit, replacing the traditional point-to-surface contact, and structurally achieving multiple layers of sealing and waterproofing.

[0036] The second locking buckle 3 provided in this embodiment has a structural design that is compatible with the first locking buckle 2, significantly improving the comprehensiveness and reliability of the seal. When at least two sets of water-stop sealing structures are fitted together, they can form a water-stop barrier without dead angles, eliminating the need for additional anti-seepage materials and reducing construction costs and process complexity. The planar contact design ensures more uniform stress distribution between the snap-fit ​​part and the first locking buckle 2, avoiding stress concentration caused by traditional point-to-surface contact, reducing scratch damage to the locking buckle during installation and removal, significantly extending the service life of the locking buckle, and maintaining good sealing performance even after multiple uses. The standardized contact surface design facilitates mass production and quality control, improving product consistency and interchangeability, enabling the sheet piles to be quickly adapted and used in different projects, resulting in higher construction efficiency.

[0037] In some embodiments, see Figure 3 and Figure 4 The outer side of the mating block 24 has a first abutting surface 242, and the outer side of the first connecting plate 23 has a second abutting surface 231. The inner side of the second transition plate 32 has a third abutting surface 321 that is adapted to the first abutting surface 242, and the inner side of the second mounting plate 31 has a fourth abutting surface 311 that is adapted to the second abutting surface 231. The first abutting surface 242 can be sealed and fitted with the third abutting surface 321, and the second abutting surface 231 can be sealed and fitted with the fourth contact surface 331. When the snap-fit ​​part is snap-fitted into the connecting space, there are two to four sets of sealing and water-stopping structures between the first contact surface 211 and the fourth contact surface 331, the second contact surface 221 and the fifth contact surface 341, the third contact surface 241 and the sixth contact surface 342, the first abutting surface 242 and the third abutting surface 321, and the second abutting surface 231 and the fourth abutting surface 311.

[0038] In practical implementation, a first abutment surface 242, a third abutment surface 321, a second abutment surface 231, and a fourth abutment surface 311 are respectively provided on the inner and outer sides of the first latch 2 and the second latch 3, forming five sets of potential sealing pairs. Through mechanical interlocking during snapping, two to four sets of sealing and water-stopping structures are automatically formed. Even if some contact surfaces have slight defects due to construction wear or changes in working conditions, the water-stopping effect can still be guaranteed by other sets of abutment surfaces, improving the fault tolerance and reliability of the structure.

[0039] This embodiment provides a multi-dimensional sealing design, which significantly improves the reliability of water-stopping. Traditional locking mechanisms lose their water-stopping function once a single contact point is damaged. However, this design, with two to four sets of seals, forms multiple layers of protection. Even in complex construction environments where some contact surfaces experience slight wear or impurities, the overall water-stopping effect is still guaranteed, effectively preventing leakage. The simultaneous contact of the first abutment surface 242 with the third abutment surface 321, and the second abutment surface 231 with the fourth abutment surface 311, makes the connection between the first locking mechanism 2 and the second locking mechanism 3 tighter and more secure, forming a comprehensive interlocking constraint. This improves the pull-out resistance and lateral force resistance of the connection, reducing the risk of disengagement when the construction depth increases or when water flow impacts. The uniform stress design of the multiple sealing water-stopping structures further disperses stress during construction, insertion, and use, avoiding lock damage caused by localized stress concentration, extending the number of times the sheet pile can be reused, and reducing engineering material costs.

[0040] In some embodiments, see Figure 3 The cross-sectional area of ​​the connecting block 24 in the thickness direction of the sheet pile body 1 gradually increases along the direction closer to the second end; the third contact surface 241 is set at an angle to the first contact surface 211 and the second contact surface 221 respectively.

[0041] It should be noted that the cross-sectional area of ​​the connecting block 24 increases along the direction close to the second end of the sheet pile body 1, forming a gradual structure. Combined with the angle design between the third contact surface 241 and the first contact surface 211 and the second contact surface, it forms a guiding effect during the snap-fit. At the same time, the gradual structure achieves an interference fit of the snap-fit ​​part, improves the tightness of the fit, and reduces the generation of gaps.

[0042] The mating block 24 provided in this embodiment has high reliability. The included angle design provides excellent guidance, reducing the alignment difficulty and frictional resistance during insertion of the snap-fit ​​part, and improving the efficiency of sheet pile driving. The interference fit formed by the gradual change in cross-sectional area ensures a gapless fit between the snap-fit ​​part and the mating block 24, significantly improving the sealing effect and structurally blocking the water seepage path, eliminating the need for additional anti-seepage materials. The gradual structure makes the snap-fit ​​process smoother, avoiding damage to the locking buckle from instantaneous impact forces. At the same time, the interference fit enhances the self-locking property of the connection, improves the overall stability of the sheet pile structure, and reduces the risk of loosening caused by vibration and water flow impact during use. The included angle between the third contact surface 241 and other contact surfaces ensures more uniform stress distribution on each contact surface, avoiding local stress concentration, extending the service life of the locking buckle, and maintaining good fit performance even after repeated use, thus improving the product's economy and environmental friendliness.

[0043] In some embodiments, see Figure 4 The cross-sectional area of ​​the clamp 34 in the thickness direction of the sheet pile body 1 gradually increases along the direction closer to the first end, so that the sixth contact surface 342 and the third contact surface 241 are parallel to each other.

[0044] It should be noted that the cross-sectional area of ​​the snap-fit ​​connector 34 increases along the direction close to the first end of the sheet pile body 1, which complements and adapts to the gradual structure of the mating block 24. At the same time, the sixth contact surface 342 and the third contact surface 241 remain parallel to ensure that the two can form a full and uniform planar contact, maximize the contact area, and improve the sealing reliability.

[0045] The snap-fit ​​connector 34 and mating block 24 provided in this embodiment further optimize sealing and connection performance. The parallel contact surface design ensures a complete fit between the sixth contact surface 342 and the third contact surface 241, maximizing the contact area and ensuring uniform distribution of sealing pressure. The complementary gradient structure of the snap-fit ​​connector 34 and mating block 24 makes the snap-fit ​​process smoother and the interference fit more uniform, reducing insertion and extraction damage during construction, while enhancing the connection's strength and improving the overall deformation resistance of the sheet pile. The combination of the gradient structure and parallel contact surface design allows for a tight fit even with slight dimensional deviations through interference fit, improving the product's fault tolerance and the feasibility of mass production. The comprehensive planar contact reduces wear on the locking mechanism, extends the number of reuses, reduces project costs, and facilitates cleaning and maintenance.

[0046] In some embodiments, see Figure 3 The spacing of the snap-fit ​​channels 20 in the thickness direction of the sheet pile body 1 is smaller than the spacing of the connecting spaces in the thickness direction of the sheet pile body 1. This smaller spacing of the snap-fit ​​channels 20 in the thickness direction of the sheet pile body 1 creates a narrowing structure. After passing through the narrower snap-fit ​​channels 20, the snap-fit ​​part enters the wider connecting space. The narrowing effect of the snap-fit ​​channels 20 creates a lateral clamping force on the snap-fit ​​part, forcing it to fit tightly against the contact surface of the first latch 2, thus increasing the sealing pressure.

[0047] The snap-fit ​​channel 20 design in this embodiment improves connection reliability. The lateral clamping force generated by the constriction structure ensures a tight fit between the snap-fit ​​part and the first contact surface 211, the second contact surface 221, and the third contact surface 241, effectively eliminating gaps and significantly improving the sealing effect. The clamping force enhances the connection's firmness, improves the lock's pull-out resistance and loosening resistance, and reduces the risk of disengagement due to increased construction depth, water flow impact, or vibration. The constriction structure provides good guidance and positioning, reducing the difficulty of alignment when inserting the snap-fit ​​part, avoiding uneven contact surface fit caused by misalignment, and improving construction efficiency and quality. The uniform distribution of the clamping force avoids local stress concentration, reduces damage to the lock during construction insertion and extraction, extends the lock's service life, and enhances the reusability of the sheet pile.

[0048] In some embodiments, the first mounting plate 21, the first transition plate 22, the first connecting plate 23, and the mating block 24 are integrally formed; the second mounting plate 31, the second transition block, the second connecting plate 33, and the snap connector 34 are integrally formed.

[0049] Both the first latch 2 and the second latch 3 are made of one piece, which avoids gaps and weak points in spliced ​​structures, ensures the structural integrity and dimensional accuracy of each component, and allows the contact surfaces to maintain the designed flatness and relative position, providing a structural basis for sealing and contact.

[0050] In this embodiment, the one-piece molding process forms the basis for the improved performance of the locking mechanism. One-piece molding eliminates the gaps and weak points in spliced ​​locking mechanisms, significantly improving the overall strength and deformation resistance of the locking mechanism. It can better withstand the insertion and extraction forces during construction, the lateral pressure during engineering use, and the impact of water flow, reducing the risk of locking mechanism breakage and deformation, and extending the service life of the sheet piles. The hot casting process can precisely control the dimensional accuracy and relative position of each component, ensuring the flatness and fit of the contact surfaces. This allows the contact surfaces of the first locking mechanism 2 and the second locking mechanism 3 to fit precisely, improving the stability and reliability of the water-stopping effect. The one-piece molding process simplifies the processing flow, reduces assembly steps, lowers processing costs and the defect rate, facilitates mass production, and can meet the needs of large-scale projects for sheet piles.

[0051] The following is a specific implementation structure of this application: The first contact surface is used as the reference surface, which is consistent with the outer plane of the pile leg of the sheet pile body. The length of the second contact surface L2 and the length of the straight segment L3 of the third contact surface are both 20~30mm. The straight segment of the first abutment surface L4 is 15~20mm. The straight segment L5 of the second abutment surface is 20~25mm. The thickness b of the first locking plate is 4~10mm.

[0052] Based on the same inventive concept, see [reference] Figures 6 to 11 This application also provides a method for processing multi-faceted contact water-stopping interlocking steel sheet piles, used to manufacture multi-faceted contact water-stopping interlocking steel sheet piles as described in any of the above embodiments, comprising the following steps: S1: performing rolling hot forming on the first end of the sheet pile body 1 to bend the first end and fold out the first contact surface 211; S2: performing rolling hot forming on the first end to fold out the second contact surface 221; S3: continuing to perform guide hot forming on the first end to bend the first end; S4: performing guide hot forming again on the bent first end to form the third contact surface 241 and process the first interlock 2; S5: repeating steps S1 to S4 on the second end of the sheet pile body 1, and processing in the opposite direction, to form the second interlock 3.

[0053] In specific implementation, this embodiment uses a step-by-step hot processing process of rolling hot forming, precision rolling hot forming, and two guide hot forming to gradually shape the structure and contact surface of the first latch 2 and the second latch 3. By utilizing the plasticity of the material during the hot processing, the angle, size and flatness of each contact surface are precisely controlled to ensure the sealing compatibility of multi-faceted contact, while improving the mechanical properties of the material.

[0054] The multi-faceted contact water-stop interlocking sheet pile processing method provided in this embodiment, compared with the prior art, forms a tight water-stopping zone with at least two sets of sealing water-stopping structures. It meets the complete water-stopping requirements in engineering design without the need for additional water-blocking materials or welding seals. Planar contact replaces discontinuous point-to-surface contact; repeated insertion and removal during construction does not cause stress concentration, avoiding damage to the interlocking rings. Even with repeated use, the integrity of the interlocking rings remains, and the water-blocking and soil-retaining functions do not significantly diminish. The multi-faceted interlocking method makes the interlocking ring connection more secure, effectively reducing the risk of disengagement as the construction depth increases, and adapting to deeper engineering needs. Step-by-step processing allows for precise control of the forming effect at each step, gradually refining the angles, dimensions, and flatness of each structure, ensuring precise adaptation of multiple contact surfaces, and guaranteeing the sealing reliability of the multi-faceted contact from a technological perspective. Hot forming enhances the mechanical properties of materials. Through rolling, precision rolling, and guide forming, the grains of the locking material become finer, significantly improving strength, hardness, and toughness. This strengthens the wear resistance and deformation resistance of the first locking element 2 and the second locking element 3, extending their service life. The more uniform plastic flow of the material during hot forming avoids residual stress that may occur during cold working, reducing the risk of cracking in the first locking element 2 and the second locking element 3 during use. This ensures that the sheet piles maintain stable performance under complex construction conditions and long-term use.

[0055] In some embodiments, step S3, "re-performing the bent first end with guide thermoforming", specifically includes: performing upper and lower guide thermoforming on the bent first end to form a semi-formed buckle; step S4, "re-performing the bent first end with guide thermoforming", specifically includes: performing upper and lower guide thermoforming on the semi-formed buckle to process it into a finished buckle.

[0056] In this embodiment, the two guide thermoforming processes are used to refine the semi-formed and finished buckles respectively. By utilizing the guiding and shaping effects of the upper and lower guides, the bending radius, angle and contact surface size of the buckle are precisely controlled to ensure that the contact surfaces of the final product can be perfectly matched, while further optimizing the material structure.

[0057] In practice, the two guide thermoforming processes are performed using a guide forming machine 4. The first guide thermoforming uses a combination of an upper guide 41 and a first lower guide 42, as follows: Figure 10 As shown, a semi-formed latch is formed, and the semi-formed latch undergoes a second guide thermoforming, as shown. Figure 11As shown, the semi-formed buckle is placed into the combination of the upper guide 41 and the second lower guide 43 for heat processing to obtain the finished buckle.

[0058] It should be noted that guides refer to devices installed before and after the roll passes during the section steel rolling process to help the rolled piece enter and exit the roll passes accurately and stably in a predetermined direction and state. Their working principle and internal structure are common knowledge in the field and will not be elaborated upon here.

[0059] In this embodiment, the first guide forming focuses on the structural shaping of the semi-formed latch, laying the foundation for subsequent precision machining. The second guide forming precisely refines the key contact surfaces, ensuring that the angles, flatness, and dimensional accuracy of each contact surface meet design standards. This allows the contact surfaces of the first latch 2 and the second latch 3 to achieve a gapless fit, significantly improving the sealing and water-stopping effect. Furthermore, the guiding function of the upper and lower guide devices ensures more uniform material flow during thermoforming, avoiding localized deformation or dimensional deviations. Simultaneously, the shaping effect of the guides optimizes the structural transition between the first latch 2 and the second latch 3, reducing stress concentration points and improving the overall strength and fatigue resistance of the first latch 2 and the second latch 3, extending their service life. The guide thermoforming process allows for flexible adjustment of parameters such as the spiral surface length and bending radius to adapt to different specifications and working conditions. The process is highly flexible, and the parameters are highly controllable, ensuring product consistency in mass production and improving product quality stability.

[0060] The following is a specific implementation method of the surface-contact water-stop interlocking steel sheet pile processing method of this application: The flattening height h in the butterfly rolling process is determined based on the most economical principle of roll diameter and the external dimensional requirements of different product specifications. The rolling process angle is determined according to a1=arccos(h / (1 / 2w), where w is the width of the web; r1 is the (butterfly-shaped) rolling process radius, which is also used as a reference data for calculating the web stiffeners; The first guide hot forming and the second guide hot forming can be set independently. The length L of the upper guide spiral surface is determined according to the rolling speed and the principle of smooth steel passage.

[0061] Based on the final forming state of the rolling process, the forming principle of upper guide 41 and first lower guide 42 is adopted to form the final state as shown. Figure 10 The semi-formed locking buckle shown; the horizontal length of the spiral guide surface is determined according to the rolling speed, L=100mm-500mm, a3=90°.

[0062] Based on the final forming state of the rolling process, the forming principle of upper guide 41 and second lower guide 43 is adopted to form the final state as shown. Figure 11The finished locking mechanism shown; the horizontal length of the spiral guide surface is determined according to the rolling speed, L=100mm-500mm, a2=a3=a4=90°. The degree of A5 is the same as the inclination angle of the sheet pile body 1.

[0063] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-faceted contact water-stopping interlocking steel sheet pile, characterized in that, include: Sheet pile body(1); A first latch (2) is installed at the first end of the sheet pile body (1). A connecting space is formed inside the first latch (2). A snap-fit ​​channel (20) is formed at the second end of the sheet pile body (1). The connecting space has a first contact surface (211), a second contact surface (221), and a third contact surface (241) arranged sequentially. The second latch (3) is installed at the second end of the sheet pile body (1), and the second latch (3) has a snap-fit ​​part on the side facing the sheet pile body (1); In this configuration, two adjacent sheet pile bodies (1) are arranged in opposite directions. The snap-fit ​​part enters the connection space through the snap-fit ​​channel (20) of the adjacent sheet pile body (1). The snap-fit ​​part is in sealed contact with at least two of the first contact surface (211), the second contact surface (221), and the third contact surface (241) to form at least two sealing and water-stopping structures.

2. The multi-faceted contact water-stopping interlocking steel sheet pile as described in claim 1, characterized in that, The first latch (2) includes a first mounting plate (21), a first transition plate (22), and a first connecting plate (23) connected in sequence; The first mounting plate (21) is connected to the first end of the sheet pile body (1); the first connecting plate (23) is parallel to the first mounting plate (21); the surface of the first transition plate (22) is perpendicular to the first mounting plate (21) and the first connecting plate (23) respectively; A mating block (24) is installed on the end of the first connecting plate (23) facing the first mounting plate (21); The first mounting plate (21), the first transition plate (22), the first connecting plate (23), and the docking block (24) enclose the connection space, and the snap-fit ​​channel (20) is formed between the first mounting plate (21) and the docking block (24); The first contact surface (211) is formed on the inner side of the first mounting plate (21), the second contact surface (221) is formed on the inner side of the first transition plate (22), and the third contact surface (241) is formed on the inner side of the mating block (24).

3. The multi-faceted contact water-stopping interlocking steel sheet pile as described in claim 2, characterized in that, The snap-fit ​​part includes a second connecting plate (33) and a snap-fit ​​connector (34). The second latch (3) also includes a second mounting plate (31) and a second transition plate (32). The second mounting plate (31), the second transition plate (32) and the second connecting plate (33) are connected in sequence. The snap-fit ​​connector (34) is installed on the side of the second connecting plate (33) facing the second mounting plate (31). The second mounting plate (31) is connected to the second end of the sheet pile body (1); the second connecting plate (33) is parallel to the second mounting plate (31); the surface of the second transition plate (32) is perpendicular to the second mounting plate (31) and the second connecting plate (33) respectively; A fourth contact surface (331) is formed on the outer side of the second connecting plate (33), a fifth contact surface (341) is formed on the outer side of the snap-fit ​​connector (34), and a sixth contact surface (342) is formed on the inner side of the snap-fit ​​connector (34). The fourth contact surface (331) can seal against the first contact surface (211), the fifth contact surface (341) can seal against the second contact surface (221), and the sixth contact surface (342) can seal against the third contact surface (241).

4. The multi-faceted contact water-stopping interlocking steel sheet pile as described in claim 3, characterized in that, The outer side of the docking block (24) has a first abutting surface (242), and the outer side of the first connecting plate (23) has a second abutting surface (231). The inner side of the second transition plate (32) forms a third abutment surface (321) adapted to the first abutment surface (242), and the inner side of the second mounting plate (31) forms a fourth abutment surface (311) adapted to the second abutment surface (231); the first abutment surface (242) can be sealed and fitted with the third abutment surface (321), and the second abutment surface (231) can be sealed and fitted with the fourth contact surface (331); When the snap-fit ​​part is snapped into the connecting space, there are two to four sets of sealing and water-stopping structures between the first contact surface (211) and the fourth contact surface (331), the second contact surface (221) and the fifth contact surface (341), the third contact surface (241) and the sixth contact surface (342), the first abutting surface (242) and the third abutting surface (321), and the second abutting surface (231) and the fourth abutting surface (311).

5. The multi-faceted contact water-stopping interlocking steel sheet pile as described in claim 3, characterized in that, The cross-sectional area of ​​the connecting block (24) in the thickness direction of the sheet pile body (1) gradually increases along the direction closer to the second end; The third contact surface (241) is set at an angle to the first contact surface (211) and the second contact surface (221), respectively.

6. The multi-faceted contact water-stopping interlocking steel sheet pile as described in claim 5, characterized in that, The cross-sectional area of ​​the snap-fit ​​connector (34) in the thickness direction of the sheet pile body (1) gradually increases in the direction close to the first end, so that the sixth contact surface (342) is parallel to the third contact surface (241).

7. The multi-faceted contact water-stopping interlocking steel sheet pile as described in claim 1, characterized in that, The spacing of the snap-fit ​​channel (20) in the thickness direction of the sheet pile body (1) is smaller than the spacing of the connecting space in the thickness direction of the sheet pile body (1).

8. The multi-faceted contact water-stopping interlocking steel sheet pile as described in claim 3, characterized in that, The first mounting plate (21), the first transition plate (22), the first connecting plate (23), and the docking block (24) are integrally formed; The second mounting plate (31), the second transition block, the second connecting plate (33), and the snap connector (34) are integrally formed.

9. A method for processing multi-faceted contact water-stopping interlocking steel sheet piles, used to manufacture multi-faceted contact water-stopping interlocking steel sheet piles as described in any one of claims 1 to 8, characterized in that, Includes the following steps: S1: The first end of the sheet pile body (1) is rolled and hot-formed to bend the first end and fold out the first contact surface (211); S2: The first end is thermoformed by rolling to fold out the second contact surface (221); S3: Continue to perform guide thermoforming on the first end, so that the first end is bent; S4: Perform guide thermoforming on the first bent end again to form the third contact surface (241) and process the first latch (2); S5: Repeat steps S1 to S4 on the second end of the sheet pile body (1), with the processing direction reversed, to form the second lock (3).

10. The processing method for multi-faceted contact water-stopping interlocking steel sheet piles as described in claim 9, characterized in that, Step S3, "re-performing the first bent end with a guide thermoforming", specifically includes: The first bent end is thermoformed using upper and lower guides to form a semi-formed lock. Step S4, "re-performing the bent first end with a guide thermoforming", specifically includes: The semi-formed buckle is thermoformed using upper and lower guides to produce the finished buckle.

Images