Silty geological concrete structure foundation pit anti-seepage steel sheet pile and construction technology
The three-state conversion design of staggered locking connectors and elliptical reinforcement strips solves the leakage problem at the traditional lock-type steel sheet pile connection, achieves efficient sealing connection of the steel sheet pile body, and ensures construction safety.
Patent Information
- Application Number
- CN202511109351.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-08
- Publication Date
- 2025-10-10
AI Technical Summary
Traditional locking steel sheet piles are prone to forming seepage channels at the connections between adjacent pile bodies, and the seals fail under soft soil or dynamic load conditions. Especially in high water pressure environments, they may cause safety accidents such as foundation pit collapse.
It adopts a staggered locking buckle design and an elliptical reinforcement strip, achieves progressive locking through three-state conversion, and uses the radial expansion force of the reinforcement strip to eliminate the connection gap and form an efficient seal.
It achieves efficient sealing connection between steel sheet pile bodies, prevents leakage and ensures construction safety.
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Figure CN120759246A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of steel sheet pile connection structures, in particular to a leakage-proof steel sheet pile for a silt geological concrete structure foundation pit and a construction process. Background Art
[0002] Steel sheet piles are commonly used as retaining and water-stopping structures in civil engineering. Traditional interlocking steel sheet piles have two major technical bottlenecks: When adjacent piles are connected through mechanical interlocking, gaps between the interlocking interlocks can easily form seepage channels due to machining precision and construction errors. Traditional interlocking interlocks rely on the deadweight of the piles or external pressure to achieve a tight fit, which can easily cause displacement in soft soil or under dynamic loads, leading to seal failure. Leakage, especially in high water pressure environments, can lead to safety accidents such as foundation pit collapse.
[0003] In order to solve the above problems, the present application provides a silt sand geological concrete structure foundation pit anti-leakage steel sheet pile and construction process, which improves the connection and sealing effect between adjacent steel sheet pile bodies and ensures construction safety. Summary of the Invention
[0004] In order to solve the above problems, the present invention provides a silt sand geological concrete structure foundation pit anti-leakage steel sheet pile and a construction process.
[0005] The present invention solves the technical problem by adopting a technical solution: a steel sheet pile for preventing leakage in a foundation pit of a silt geological concrete structure, comprising a steel sheet pile body and a connecting assembly, wherein two sides of the steel sheet pile body are provided with connecting buckles, the connecting buckles opening in a direction away from the steel sheet pile body, and the connecting assembly comprising a reinforcement bar having an elliptical cross-section and two elliptical filling cavities defined therein; The connecting buckle includes a first connecting plate, a fixed plate and a second connecting plate which are vertically connected in sequence. The width of the first connecting plate is greater than the width of the second connecting plate. A connecting opening is formed between the outer end of the first connecting plate and the outer end of the second connecting plate. When the steel sheet pile bodies are connected, the connecting buckles of two adjacent steel sheet pile bodies are relatively staggered and engaged to form a locking cavity. The locking cavity is used to accommodate a reinforcement strip, and the long diameter of the reinforcement strip is greater than the minimum diagonal of the locking cavity.
[0006] As an optimization, the outer end of the first connecting plate is bent toward the inner side of the connecting buckle to form a vertically arranged first limiting portion, and the outer end of the second connecting plate is bent toward the inner side of the connecting buckle to form a vertically arranged second limiting portion, and a circular arc chamfer is provided between the inner side of the second limiting portion and the second connecting plate.
[0007] As an optimization, the difference in length between the first connecting plate and the second connecting plate is equal to the thickness of the fixing plate, and the opening width of the connecting buckle is smaller than the long diameter of the reinforcement strip; When the two connecting buckles are relatively engaged, the second connecting plate is arranged on the inner side of the first connecting plate of the other connecting buckle.
[0008] As an optimization, a driving rod is provided at the axis of the reinforcement strip, and the upper end of the driving rod passes through the top of the reinforcement strip and is provided with a connecting portion, which is prismatic; A connecting pipe is provided between the two filling cavities. The two filling cavities are symmetrically arranged along the long diameter of the reinforcement strip. The tops of the filling cavities are connected with an inflation tube.
[0009] As an optimization, the locking cavity is formed by the second connecting plates and the fixed plate of the two connecting buckles, the long diameter of the reinforcement strip is smaller than the length of the maximum diagonal of the locking cavity, and the long diameter of the reinforcement strip is smaller than the distance between the two second connecting plates arranged opposite to each other; When the reinforcement strip rotates, it passes through the maximum diagonal, between the two second connecting plates, and the minimum diagonal in sequence, forming the first state, the second state, and the third state respectively. When the reinforcement strip rotates from the second state to the third state, it drags the two relatively arranged connecting buckles to clamp and seal the two connecting buckles.
[0010] A construction process for anti-seepage steel sheet piles for a foundation pit of a silt geological concrete structure, comprising any of the anti-seepage steel sheet piles described above, specifically comprising the following steps: S1. Initial engagement: The two adjacent steel sheet pile bodies are staggered relative to each other, so that the connecting buckles of the two adjacent steel sheet pile bodies are staggered and inserted to form a preliminary engagement state; S2 strengthen the connection: the connection assembly is inserted between the two connecting buckles of the initial engagement, so that the long diameter of the reinforcement strip is set along the long diameter of the two connecting buckles of the initial engagement state; S3 reinforcement locking: rotating the reinforcement strip, so that the reinforcement strip rotates, driving the two connecting buckles to engage to form a locking cavity, until the long diameter of the reinforcement strip is set along the minimum diameter of the locking cavity, the two connecting buckles are fastened to form a locked engaging state; S4. Sealing and locking: Inflate the reinforcement strip so that it expands and presses against the two connecting buckles to form a sealed locking state.
[0011] As an optimization, the specific construction process of locking the engaging state in step S3 is as follows: Initially, the reinforcement strip is movably arranged in the locking cavity, which is the first state. The reinforcement strip is rotated counterclockwise so that the two sides of the long diameter of the reinforcement strip are in contact and squeezed with the two oppositely arranged connecting buckles, forming the second state. The reinforcement strip is continued to be rotated, and the second connecting plates of the two connecting buckles are dragged by the reinforcement strip to move relative to each other until the two connecting buckles are seamlessly engaged, forming the third state.
[0012] As an optimization, in the first state, the filling cavity inside the reinforcement strip is in a natural state, in the second state, the filling cavity is in a completely closed state, and in the third state, the filling cavity is squeezed into a semi-closed state.
[0013] The beneficial effects of this program are as follows: A progressive locking cavity (locking cavity) is formed through the staggered engagement design of the connecting buckles, and the three-state conversion of the elliptical reinforcement strip is used to realize the transformation from initial positioning to sealing and locking. When the long diameter of the reinforcement strip rotates from parallel to the maximum diagonal to the minimum diagonal, a radial expansion force is generated, which forcibly drags the second connecting plates of the two connecting buckles to move relative to each other, eliminating the fitting gap, achieving a "mechanical interference seal", and ensuring an efficient sealed connection between the two steel sheet pile bodies. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is an axial schematic diagram of the steel sheet pile main body connection structure of the present invention.
[0015] Figure 2 For the present invention Figure 1 Schematic diagram of the enlarged structure of part A.
[0016] Figure 3 It is a top view schematic diagram of the steel sheet pile main body connection structure of the present invention.
[0017] Figure 4 For the present invention Figure 3 Schematic diagram of the enlarged structure of part B.
[0018] Figure 5 This is a schematic diagram of the first state of two connecting buckles of the present invention.
[0019] Figure 6 Schematic diagram of the second state of the two connecting buckles of the present invention.
[0020] Figure 7 This is a schematic diagram of the third state of the two connecting buckles of the present invention.
[0021] Among them, 1. Steel sheet pile body, 2. Connecting buckle, 3. Reinforcement strip, 4. First connecting plate, 5. Fixing plate, 6. Second connecting plate, 7. Locking cavity, 8. First limiting part, 9. Second limiting part, 10. Driving rod, 11. Connecting part, 12. Filling cavity, 13. Connecting pipe, 14. Inflation pipe. DETAILED DESCRIPTION
[0022] like Figure 1-Figure 7As shown, a steel sheet pile for preventing leakage in a foundation pit of a silt geological concrete structure comprises a steel sheet pile body 1 and a connecting assembly. Connecting buckles 2 are provided on both sides of the steel sheet pile body 1, and the connecting buckles 2 are open in a direction away from the steel sheet pile body 1. The connecting assembly comprises a reinforcing strip 3, and the cross section of the reinforcing strip 3 is elliptical. Two elliptical filling cavities 12 are defined within the reinforcing strip 3. The connecting buckle 2 includes a first connecting plate 4, a fixing plate 5 and a second connecting plate 6 which are vertically connected in sequence. The width of the first connecting plate 4 is greater than the width of the second connecting plate 6. A connecting opening is formed between the outer end of the first connecting plate 4 and the outer end of the second connecting plate 6. When the steel sheet pile bodies 1 are connected, the connecting buckles 2 of the two adjacent steel sheet pile bodies 1 are relatively staggered and engaged to form a locking cavity 7. The locking cavity 7 is used to accommodate the reinforcement strip 3. The long diameter of the reinforcement strip 3 is greater than the minimum diagonal of the locking cavity 7.
[0023] The width W1 of the first connecting plate 4 needs to be greater than the width W2 of the second connecting plate 6 , and the difference ΔW=W1-W2 is the same as the thickness of the fixing plate 5 . The two connecting buckles 2 are relatively engaged to form a progressive locking cavity 7 .
[0024] During use, the length of the reinforcement strip 3 should be no less than that of the connecting buckle 2, ensuring that the long axis of the reinforcement strip 3 is parallel to the long diagonal of the locking cavity 7. The reinforcement strip 3 can be inserted downwards into the locking cavity 7 under its own weight. The reinforcement strip 3 can be made of EPDM or NBR, which exhibits sufficient compressive strength and elastic deformation capacity. A reinforcement framework can be incorporated into the reinforcement strip 3, using a stainless steel wire mesh or reinforced fibers to enhance its support strength.
[0025] Connector 2 is made of Q345B low alloy steel with a yield strength of ≥345MPa and a surface hot-dip galvanized thickness of ≥80μm to resist groundwater corrosion.
[0026] like Figure 4 As shown, the outer end of the first connecting plate 4 is bent toward the inner side of the connecting buckle 2 to form a vertically arranged first limiting portion 8, and the outer end of the second connecting plate 6 is bent toward the inner side of the connecting buckle 2 to form a vertically arranged second limiting portion 9, and an arc-shaped chamfer is provided between the inner side of the second limiting portion 9 and the second connecting plate 6.
[0027] The two connecting buckles 2 that are engaged with each other are arranged in a central symmetrical manner. The first limiting portion 8 is used to limit the adjacent connecting ports, and the second limiting portion 9 is used to support the reinforcement strip 3, so that a progressive locking structure is formed between the two limiting buckles.
[0028] like Figure 4 As shown, the difference in length between the first connecting plate 4 and the second connecting plate 6 is equal to the thickness of the fixing plate 5, and the opening width of the connecting buckle 2 is smaller than the long diameter of the reinforcing strip 3; When the two connecting buckles 2 are relatively engaged, the second connecting plate 6 is arranged in close contact with the inner side of the first connecting plate 4 of the other connecting buckle 2 .
[0029] like Figure 2 and Figure 5 As shown, a driving rod 10 is provided at the axis of the reinforcement strip 3, and the upper end of the driving rod 10 passes through the top of the reinforcement strip 3 and is provided with a connecting portion 11, which is prismatic; A connecting pipe 13 is provided between the two filling cavities 12 . The two filling cavities 12 are symmetrically arranged along the long diameter of the reinforcement strip 3 . An inflation tube 14 is connected to the top of the filling cavity 12 .
[0030] The connecting portion 11 can be a hexagonal prism or an octagonal prism, and can be matched with an electric torque wrench to achieve fast tightening.
[0031] The two filling cavities 12 are connected by a connecting tube 13 . The cross section of the filling cavity 12 is elliptical. The long axis of the filling cavity 12 is perpendicular to the long axis of the reinforcement strip 3 . The two filling cavities 12 are symmetrically arranged on both sides of the axis of the reinforcement strip 3 .
[0032] The driving rod 10 is fixedly connected to the reinforcing strip 3 , and the inflation tube 14 is provided with an air valve.
[0033] like Figure 4 、 Figure 5-Figure 7 As shown, the locking cavity 7 is formed by the second connecting plates 6 and the fixing plate 5 of the two connecting buckles 2. The long diameter of the reinforcing strip 3 is smaller than the length of the maximum diagonal of the locking cavity 7, and the long diameter of the reinforcing strip 3 is smaller than the distance between the two oppositely arranged second connecting plates 6. When the reinforcement strip 3 rotates, it passes through the maximum diagonal, between the two second connecting plates 6, and the minimum diagonal in sequence, forming the first state, the second state, and the third state respectively. When the reinforcement strip 3 rotates from the second state to the third state, it drags the two relatively arranged connecting buckles 2 to clamp and seal the two connecting buckles 2.
[0034] Figure 5 In the first state, the long axis of the reinforcement strip 3 is parallel to the maximum diagonal line of the locking cavity 7, α=0°; Figure 6 In the second state, the reinforcement strip 3 is rotated to α = 45°, and the angle between the long axis and the diagonal line generates a radial force component, eliminating 50%-70% of the initial gap; Figure 7 In the third state, continue to rotate to α=90°, the long axis is perpendicular to the initial direction, the long axis length is greater than the minimum diagonal of the locking cavity 7, and the cavity wall is forced to be squeezed to form a high-strength seal; in the third state, air is inflated into the filling cavity 12 through the inflation tube 14, so that the reinforcement strip 3 tightens the locking cavity 7 to improve the sealing connection effect.
[0035] A construction process for anti-seepage steel sheet piles in a foundation pit of a silt sand geological concrete structure specifically comprises the following steps: S1 preliminary engagement: The two adjacent steel sheet pile bodies 1 are relatively staggered, so that the connecting buckle 2 of the two adjacent steel sheet pile bodies 1 is staggered and inserted to form a preliminary engagement state; Before using the steel sheet pile body 1, use a wire brush to remove rust and dirt inside the connector 2, rinse with a high-pressure water gun and then dry. Evenly apply anti-seepage materials such as butter, dry bentonite, etc. inside the connector 2 to reduce installation resistance.
[0036] S2. Strengthen the connection: Insert the connecting assembly between the two connecting buckles 2 in the initial engagement, so that the long diameter of the reinforcement strip 3 is set along the long diameter of the two connecting buckles 2 in the initial engagement state, such as Figure 5 As shown; S3. Reinforcement locking: Rotate the reinforcement strip 3 to rotate the reinforcement strip 3, driving the two connecting buckles 2 to engage to form a locking cavity 7, until the long diameter of the reinforcement strip 3 is set along the minimum diameter of the locking cavity 7, and the two connecting buckles 2 are clamped to form a locked state, such as Figure 7 As shown; S4. Sealing and locking: Inflate the reinforcement strip 3 so that the reinforcement strip 3 expands and presses against the two connecting buckles 2 to form a sealed engagement state.
[0037] The specific construction process of locking the engaging state in step S3 is as follows: Initially, the reinforcing strip 3 is movably arranged in the locking cavity 7, which is the first state. The reinforcing strip 3 is rotated counterclockwise so that the two sides of the long diameter of the reinforcing strip 3 are in contact with the two oppositely arranged connecting buckles 2 and squeezed tightly, forming the second state. Figure 6 As shown; continue to rotate the reinforcement strip 3, and drag the second connecting plates 6 of the two connecting buckles 2 through the reinforcement strip 3 to move relative to each other until the two connecting buckles 2 are seamlessly engaged to form a third state.
[0038] After the transition to the third state, the inflation tube 14 is connected through the inflation device to fill the filling cavity 12 with high-pressure gas, so that the reinforcement strip 3 is further expanded and the two connecting buckles 2 are further squeezed and locked.
[0039] During the rotation of the reinforcement strip 3 , the air valve of the inflation tube 14 can be opened to allow the gas inside the filling cavity 12 to be discharged to the outside without affecting the deformation of the reinforcement strip 3 .
[0040] like Figure 5-Figure 7 As shown, in the first state, the filling cavity 12 inside the reinforcement strip 3 is in a natural state, in the second state, the filling cavity 12 is in a completely closed state, and in the third state, the filling cavity 12 is squeezed into a semi-closed state.
[0041] Except for the installation and operation process of the reinforcement strip 3, the specific installation and connection process of the steel sheet pile body 1 can be installed and checked according to the conventional installation steps, which will not be repeated here.
[0042] The above-mentioned specific embodiments are only specific cases of the present invention. The patent protection scope of the present invention includes but is not limited to the product form and style of the above-mentioned specific embodiments. Any anti-leakage steel sheet piles and construction technology for foundation pits of silt sand geological concrete structures that comply with the claims of the present invention and any appropriate changes or modifications made thereto by ordinary technicians in any corresponding technical field shall fall within the patent protection scope of the present invention.
Claims
1. A steel sheet pile for preventing leakage in a foundation pit of a silt geological concrete structure, comprising a steel sheet pile body (1) and a connecting assembly, characterized in that: The two side edges of the steel sheet pile body (1) are provided with connecting buckles (2), the connecting buckles (2) are open in a direction away from the steel sheet pile body (1), the connecting assembly comprises a reinforcing strip (3), the cross section of the reinforcing strip (3) is elliptical, and two elliptical filling cavities (12) are provided inside the reinforcing strip (3); The connecting buckle (2) comprises a first connecting plate (4), a fixing plate (5) and a second connecting plate (6) which are connected vertically in sequence. The width of the first connecting plate (4) is greater than the width of the second connecting plate (6). A connecting opening is formed between the outer end of the first connecting plate (4) and the outer end of the second connecting plate (6). When the steel sheet pile bodies (1) are connected, the connecting buckles (2) of two adjacent steel sheet pile bodies (1) are relatively staggered and engaged to form a locking cavity (7). The locking cavity (7) is used to accommodate the reinforcement strip (3). The long diameter of the reinforcement strip (3) is greater than the minimum diagonal of the locking cavity (7).
2. The anti-seepage steel sheet pile for foundation pit of silt sand geological concrete structure according to claim 1, characterized in that: The outer end of the first connecting plate (4) is bent toward the inner side of the connecting buckle (2) to form a vertically arranged first limiting portion (8), and the outer end of the second connecting plate (6) is bent toward the inner side of the connecting buckle (2) to form a vertically arranged second limiting portion (9), and an arc-shaped chamfer is provided between the inner side of the second limiting portion (9) and the second connecting plate (6).
3. The anti-seepage steel sheet pile for foundation pit of silt sand geological concrete structure according to claim 1, characterized in that: The difference in length between the first connecting plate (4) and the second connecting plate (6) is equal to the thickness of the fixing plate (5), and the opening width of the connecting buckle (2) is smaller than the long diameter of the reinforcing strip (3); When the two connecting buckles (2) are relatively engaged, the second connecting plate (6) is arranged to fit the inner side of the first connecting plate (4) of the other connecting buckle (2).
4. The anti-seepage steel sheet pile for foundation pit of silt sand geological concrete structure according to claim 1, characterized in that: A driving rod (10) is provided at the axis of the reinforcement strip (3); the upper end of the driving rod (10) passes through the top of the reinforcement strip (3) and is provided with a connecting portion (11); the connecting portion (11) is prismatic; A connecting pipe (13) is provided between the two filling cavities (12), the two filling cavities (12) are symmetrically arranged along the long diameter of the reinforcement strip (3), and the top of the filling cavity (12) is connected to an inflation tube (14).
5. The anti-seepage steel sheet pile for foundation pit of silt sand geological concrete structure according to claim 2, characterized in that: The locking cavity (7) is formed by the second connecting plates (6) and the fixing plate (5) of the two connecting buckles (2); the long diameter of the reinforcing strip (3) is smaller than the length of the maximum diagonal of the locking cavity (7); and the long diameter of the reinforcing strip (3) is smaller than the distance between the two second connecting plates (6) arranged opposite to each other; When the reinforcing strip (3) rotates, it passes through the maximum diagonal, between the two second connecting plates (6), and the minimum diagonal in sequence, forming a first state, a second state, and a third state respectively. When the reinforcing strip (3) rotates from the second state to the third state, it drags the two relatively arranged connecting buckles (2) to clamp them, and seals the two connecting buckles (2).
6. A construction process for anti-seepage steel sheet piles in a foundation pit of a silt sand geological concrete structure, characterized by: The anti-seepage steel sheet pile according to any one of claims 1 to 5 specifically comprises the following steps: S1. Initial engagement: The two adjacent steel sheet pile bodies (1) are staggered relative to each other, so that the connecting buckles (2) of the two adjacent steel sheet pile bodies (1) are staggered and plugged to form an initial engagement state; S2. Strengthen the connection: insert the connecting assembly into the initial engagement between the two connecting buckles (2), so that the long diameter of the reinforcement strip (3) is set along the long diameter of the two connecting buckles (2) in the initial engagement state; S3. Reinforcement and locking: rotating the reinforcement strip (3) to rotate the reinforcement strip (3), driving the two connecting buckles (2) to engage to form a locking cavity (7), until the long diameter of the reinforcement strip (3) is set along the minimum diameter of the locking cavity (7), and the two connecting buckles (2) are clamped to form a locked state; S4. Sealing and locking: inflate the reinforcing strip (3) so that the reinforcing strip (3) expands and presses against the two connecting buckles (2) to form a sealed locking state.
7. The anti-seepage steel sheet pile construction process for a silt sand geological concrete structure foundation pit according to claim 6, characterized in that: The specific construction process of locking the engaging state in step S3 is as follows: Initially, the reinforcing strip (3) is movably arranged in the locking cavity (7), which is the first state. The reinforcing strip (3) is rotated counterclockwise so that both sides of the long diameter of the reinforcing strip (3) are in contact and squeezed with the two connecting buckles (2) arranged opposite to each other, forming the second state. The reinforcing strip (3) is further rotated, and the second connecting plates (6) of the two connecting buckles (2) are dragged by the reinforcing strip (3) to move relatively until the two connecting buckles (2) are seamlessly engaged, forming the third state.
8. The anti-seepage steel sheet pile construction process for a silt sand geological concrete structure foundation pit according to claim 7, characterized in that: In the first state, the filling cavity (12) inside the reinforcement strip (3) is in a natural state; in the second state, the filling cavity (12) is in a completely closed state; and in the third state, the filling cavity (12) is squeezed into a semi-closed state.
Citation Information
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