Cement-soil mixing wall and steel sheet pile connection structure and construction method thereof

Abstract

The application discloses a cement soil mixing wall and steel sheet pile connecting structure and a construction method thereof, and belongs to the field of cement soil mixing wall and steel sheet pile connecting structure. The application aims to overcome the defects of the prior art and provide a cement soil mixing wall and steel sheet pile connecting structure and a construction method thereof. The base plate is used as an intermediate connecting piece, the expansion bolt and the locking bolt are fixed in a double way, the steel sheet pile body and the mixing wall body are rigidly connected, the gap is filled by pouring a filling layer, the two bodies form a whole stress structure, the deformation incoordination problem caused by the stiffness difference is effectively avoided, the positioning column and the positioning seat are inserted and matched, the threaded seat and the connecting seat are bolt-connected, the convex keys and the positioning seat are clamped with the reinforcing rib group, the fastening assembly extrudes and limits the center rib, and a multilayer mechanical anchoring system is formed.

Description

Technical Field

[0001] This invention relates to a connection structure between a cement-soil mixing wall and steel sheet piles and its construction method. Background Technology

[0002] Currently, the connection between existing cement-soil mixing walls and sheet piles is often a simple fit or overlap, lacking a reliable mechanical connection structure. During use, due to the significant difference in stiffness between the two, deformation inconsistencies easily occur, leading to joint opening, leakage, or even instability. Furthermore, the lack of benchmarks and positioning structures during sheet pile installation makes it difficult to guarantee installation accuracy, affecting the connection quality. The lack of effective filling and reinforcement measures between the two results in weak overall structural integrity and insufficient shear resistance in the connection area.

[0003] Therefore, a cement-soil mixing wall and steel sheet pile connection structure and its construction method are proposed to address the above problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the existing defects by providing a cement-soil mixing wall and steel sheet pile connection structure and its construction method, which can solve the problems mentioned in the background art, such as deformation inconsistency leading to joint opening, leakage or even instability.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a connection structure between a cement-soil mixing wall and steel sheet piles, comprising: Mixing the wall; Sheet piles; A substrate, which is fixedly mounted on the surface of the mixing wall by expansion bolts; A filling layer is poured, wherein the filling layer is disposed in the gap between the mixing wall and the sheet pile; The sheet pile is mounted on the base plate, which serves as the mounting reference for the sheet pile.

[0006] Preferably, it also includes a reinforcing bar assembly, which is inserted into the gap between the sheet pile body and the base plate and embedded inside the cast-in-place layer.

[0007] Preferably, the reinforcing rib group includes a central rib and an offset rib, and the offset rib is rotatably connected to the central rib through a hinge, so that the reinforcing rib group has an unfolded state and a retracted state.

[0008] Preferably, the side of the base plate adjacent to the steel sheet pile body is provided with a protruding key, a positioning seat and a connecting seat; The steel sheet pile body is provided with a positioning post and a threaded seat on the side adjacent to the base plate; The positioning pin is inserted into the positioning seat to achieve initial positioning, and the threaded seat and the connecting seat are fixedly connected by locking bolts.

[0009] Preferably, the gap between the convex key and the positioning seat is used to engage the offset rib of the reinforcing rib group.

[0010] Preferably, a reinforcing plate seat is fixedly provided on the surface of the steel sheet pile body, and a fastening component is provided inside the reinforcing plate seat. The fastening component is used to fix the offset reinforcement of the reinforcing bar group.

[0011] Preferably, the fastening assembly includes a round block, a protrusion, a toothed rack, a linkage gear, a transmission gear, and a screw; The circular block is fixedly connected to the transmission gear via a shaft, and the surface of the circular block is provided with the protrusion. The toothed rack meshes with the linkage gear, and the linkage gear meshes with the transmission gear; The screw is threadedly connected to the reinforcing plate seat, and the end of the screw is provided with a tapered end, which abuts into the inner tapered hole of the toothed strip to drive the toothed strip to slide.

[0012] A construction method for a cement-soil mixing wall and steel sheet pile connection structure, characterized by the following steps: S1: Fix the base plate to the surface of the mixing wall using expansion bolts; S2: Using the base plate as a reference, install the steel sheet pile on the base plate to complete the initial connection between the mixing wall and the steel sheet pile. S3: A filling layer is poured into the gap between the mixing wall and the sheet pile.

[0013] Preferably, before establishing the cast-in-place layer, the method further includes the step of inserting the reinforcing bar assembly into the gap between the sheet pile body and the base plate.

[0014] Preferably, before inserting the reinforcing bar group, the method further includes a step of unfolding the reinforcing bar group; After inserting the reinforcing bar assembly, the process further includes locking the reinforcing bar assembly using a fastening assembly.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: by using the base plate as an intermediate connecting member and combining the double fixing of expansion bolts and locking bolts, a rigid connection between the steel sheet pile body and the mixing wall body is achieved; at the same time, by filling the gap with a pouring filling layer, the two form an integral load-bearing structure, effectively avoiding the problem of deformation incoordination caused by stiffness differences; furthermore, through the insertion and fit of the positioning column and the positioning seat, the bolt connection of the threaded seat and the connecting seat, the snap-fit ​​of the convex key and the positioning seat to the reinforcing bar group, and the compression and limiting of the central bar by the fastening component, a multi-layer mechanical anchoring system is formed, which significantly improves the overall stability and shear resistance of the connection structure. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is an isometric view of the overall structure of the present invention; Figure 2 This is a top view of part of the structure of the present invention; Figure 3 This is an exploded view of the reinforcing bar assembly of the present invention; Figure 4 This is an exploded view of the substrate of the present invention; Figure 5 This is a cross-sectional view of the steel sheet pile and base plate node structure of the present invention; Figure 6 This is a schematic diagram of the joint structure between the reinforcing bar assembly and the sheet pile of the present invention; Figure 7 This is a cross-sectional view of the structure at the connection between the toothed rack and the gear in this invention; Figure 8 This is a cross-sectional view of the connection between the locking bolt and the toothed strip in this invention. Figure 9 This is a cross-sectional view of the structure at the connection between the circular block and the transmission gear in this invention; Figure 10 This is a perspective view of the toothed strip portion of the present invention.

[0017] In the diagram: 1. Mixing wall; 2. Sheet pile; 21. Threaded seat; 22. Positioning column; 23. Locking bolt; 3. Pouring filling layer; 4. Reinforcing plate seat; 5. Base plate; 51. Expansion bolt; 52. Positioning seat; 53. Connecting seat; 54. Protruding key; 6. Reinforcing bar assembly; 61. Central bar; 62. Offset bar; 63. Hinge; 7. Fastening assembly; 71. Round block; 72. Protrusion; 73. Toothed strip; 731. Inner conical hole; 74. Linkage gear; 75. Transmission gear; 76. Screw; 761. Conical end; 77. Shaft. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] like Figures 1 to 10 As shown, a cement-soil mixing wall and steel sheet pile connection structure: First, using expansion bolts 51, the entire base plate 5 is installed on the surface of the mixing wall 1. At the same time, the steel sheet pile 2 is installed on the base plate 5 with the base plate 5 as a reference, thus completing the initial connection between the mixing wall 1 and the steel sheet pile 2. Then, a filling layer 3 is poured into the gap between the mixing wall 1 and the steel sheet pile 2 to improve the stability of the entire structure after installation.

[0020] Example 1: Before the filling layer 3 is poured, the reinforcing bar assembly 6 is inserted into the gap between the sheet pile body 2 and the base plate 5. Then the filling layer 3 is poured. The reinforcing bar assembly 6 is divided into a central bar 61 and an offset bar 62. The surface of the offset bar 62 is fixed with a hinge 63. The offset bar 62 is rotatably connected to the central bar 61 through the hinge 63. Therefore, the entire reinforcing bar assembly 6 can be unfolded or retracted. When filling the gap, the entire reinforcing bar assembly 6 can be unfolded. During transportation, the reinforcing bar assembly 6 can be retracted to reduce its volume for easy storage.

[0021] Example 2: A key 54, a positioning seat 52, and a connecting seat 53 are fixed on the side adjacent to the base plate 5 and the sheet pile body 2. A threaded seat 21 and a positioning post 22 are fixed on the side adjacent to the base plate 5. The positioning post 22 can be inserted into the positioning seat 52 to achieve the initial positioning of the sheet pile body 2. At this time, the threaded seat 21 and the connecting seat 53 are aligned. Then, the locking bolt 23 is tightened along the threaded seat 21 until the locking bolt 23 is screwed into the connecting seat 53, thereby fixing the sheet pile body 2 on the base plate 5. The gap between the key 54 and the positioning seat 52 is used to engage two of the offset ribs 62 of the reinforcing rib group 6 to prevent the reinforcing rib group 6 from deforming during the casting of the filling layer 3.

[0022] Example 3: A reinforcing plate seat 4 is fixed to the surface of the sheet pile body 2. A fastening assembly 7 is integrated inside the reinforcing plate seat 4. The fastening assembly 7 is used to fix the state of the other two offset ribs 62 of the reinforcing rib group 6, further locking the entire reinforcing rib group 6 and ensuring the overall structural strength after the filling layer 3 has solidified. After inserting the entire reinforcing rib group 6 into the gap between the sheet pile body 2 and the base plate 5, two central ribs 61 are inserted into the gap between the positioning seat 52 and the protruding key 54, and the other two central ribs 61 are inserted into the gap between the threaded seat 21 and the positioning post 22. The screw 76, which is threaded to the reinforcing plate seat 4, is tightened. The tapered end 761 of the screw 76 is squeezed into the inner tapered hole 731 of the toothed strip 73. The inner wall of the inner tapered hole 731 is inclined, so it is squeezed by the screw 76, causing the toothed strip 73 to slide laterally. The linkage gear meshing with the toothed strip 73... The gear 74 rotates synchronously inside the reinforcing plate seat 4. The transmission gear 75, which meshes with the linkage gear 74, along with the shaft 77 fixedly connected to the transmission gear 75, rotates together inside the sheet pile body 2. The circular block 71 fixed at the other end of the shaft 77 is located between the two central ribs 61. The circular block 71 rotates synchronously, and the protrusion 72 fixed on the surface of the circular block 71 rotates synchronously. The protrusion 72 tightly abuts against the central rib 61, synchronously squeezing the two central ribs 61. With the limiting of the positioning column 22 and the threaded seat 21, the positions of the two central ribs 61 of the reinforcing rib group 6 can be limited. This achieves the purpose of limiting and fixing the entire reinforcing rib group 6, ensuring the quality of the subsequent pouring of the filling layer 3. At the same time, a single linkage gear 74 meshes with two transmission gears 75, thus simultaneously fixing the positions of the central ribs 61 in the two groups of reinforcing rib groups 6.

[0023] A construction method for a cement-soil mixing wall and steel sheet pile connection structure includes the following steps: S1: The base plate 5 is fixedly installed on the surface of the mixing wall 1 using expansion bolts 51. The expansion bolts 51 and the mixing wall 1 form a mechanical anchor, providing a stable bearing foundation for the subsequent installation of the sheet piles 2 and avoiding overall instability due to insufficient connection strength. Compared with the traditional method of reserving holes or embedding parts in the mixing wall, the expansion bolt installation is convenient, does not damage the existing wall structure, and is suitable for cast-in-place or existing walls. After the base plate 5 is fixed, a flat and precise reference surface is formed, creating conditions for the high-precision installation of the subsequent sheet piles 2.

[0024] S2: Using base plate 5 as a reference, the sheet pile 2 is installed on base plate 5, completing the initial connection between the mixing wall 1 and the sheet pile 2. Initial positioning is achieved by inserting positioning post 22 into positioning seat 52, followed by bolt connection between threaded seat 21 and connecting seat 53, simplifying the installation process and improving construction efficiency. Base plate 5, as an intermediate connecting component, achieves a rigid connection between the mixing wall 1 and the sheet pile 2, providing a stable initial connection state for the subsequent pouring of the filling layer 3. The installation method using base plate 5 as a reference avoids positioning errors caused by direct splicing in traditional construction, ensuring the geometric accuracy of the connecting structure.

[0025] S3: A filling layer 3 is set up in the gap between the mixing wall 1 and the sheet pile 2. The filling layer 3 fills all the gaps between the mixing wall 1 and the sheet pile 2 and completely wraps the reinforcing bar group 6 to form a reinforced concrete composite structure. At the same time, after the filling layer 3 solidifies, it can evenly transfer the lateral soil pressure borne by the sheet pile 2 to the mixing wall 1, avoid stress concentration, and realize the coordinated force bearing of two structures with different stiffnesses.

[0026] Before the pouring of the filling layer 3, the process includes inserting the reinforcing bar assembly 6 into the gap between the sheet pile body 2 and the base plate 5. After insertion, the reinforcing bar assembly 6 becomes a bridge connecting the mixing wall 1, the base plate 5, and the sheet pile body 2, forming an integrated load-bearing system. As a skeleton reinforcement embedded in the pouring filling layer 3, the reinforcing bar assembly 6 can effectively bear the shear and tensile stress at the joint, preventing joint cracking due to deformation inconsistency. The offset bar 62 is inserted into the gap between the protruding key 54 and the positioning seat 52, and the central bar 61 is inserted into the gap between the threaded seat 21 and the positioning post 22, forming a preliminary mechanical limit to prevent the reinforcing bar assembly 6 from shifting during the pouring process.

[0027] Before inserting the reinforcing bar assembly 6, the process includes unfolding the reinforcing bar assembly 6. The reinforcing bar assembly 6 achieves a rotatable connection between the central bar 61 and the offset bar 62 through the hinge 63. It can be folded up during transportation to reduce its volume, facilitating handling and on-site stacking management. Upon arrival at the construction site, the reinforcing bar assembly 6 can be unfolded into its working state, which is simple to operate and adapts to the pace of on-site construction. The unfolded reinforcing bar assembly 6 can fully fill the gap between the sheet pile body 2 and the base plate 5, providing skeletal support for the pouring of the filling layer 3.

[0028] After inserting the reinforcing bar group 6, the process includes locking the reinforcing bar group 6 using the fastening component 7. By tightening the screw 76, the conical end 761 presses against the inner conical hole 731 of the toothed strip 73, driving the toothed strip 73 to slide. Through the meshing of the linkage gear 74 and the transmission gear 75, the circular block 71 rotates, causing the protrusion 72 to tightly abut against the central rib 61, thus achieving active locking of the reinforcing bar group 6. By completely locking the reinforcing bar group 6 before pouring the filling layer 3, displacement and deformation of the reinforcing bar group 6 due to concrete impact or vibration during pouring are prevented, ensuring that it is ultimately located in the designed position, thereby guaranteeing the structural strength of the filling layer. A single linkage gear 74 simultaneously meshes with two transmission gears 75, which can simultaneously fix the central rib 61 of two sets of reinforcing bar groups 6, improving construction efficiency and ensuring the synchronicity and consistency of multi-point locking. The active locking of the fastening component 7, together with the passive limiting of the positioning post 22, threaded seat 21, protruding key 54, and positioning seat 52, forms a multi-point constraint on the reinforcing rib group 6, ensuring its stability during the casting and filling layer 3 molding process.

[0029] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A connection structure between a cement-soil mixing wall and steel sheet piles, characterized in that, include: Mixing wall (1); Sheet pile body (2); The substrate (5) is fixedly installed on the surface of the mixing wall (1) by expansion bolts (51); A filling layer (3) is poured, which is disposed in the gap between the mixing wall (1) and the sheet pile (2); The sheet pile body (2) is installed on the base plate (5), and the base plate (5) serves as the installation reference for the sheet pile body (2).

2. The cement-soil mixing wall and steel sheet pile connection structure according to claim 1, characterized in that, It also includes a reinforcing bar assembly (6), which is inserted into the gap between the sheet pile body (2) and the base plate (5) and embedded in the interior of the cast-in-place layer (3).

3. The cement-soil mixing wall and steel sheet pile connection structure according to claim 2, characterized in that, The reinforcing rib group (6) includes a central rib (61) and an offset rib (62). The offset rib (62) is rotatably connected to the central rib (61) through a hinge (63), so that the reinforcing rib group (6) has an unfolded state and a retracted state.

4. The cement-soil mixing wall and steel sheet pile connection structure according to claim 2, characterized in that, The base plate (5) is provided with a protruding key (54), a positioning seat (52) and a connecting seat (53) on the side adjacent to the steel sheet pile body (2). The steel sheet pile body (2) is provided with a positioning post (22) and a threaded seat (21) on the side adjacent to the base plate (5). The positioning pin (22) is inserted into the positioning seat (52) to achieve initial positioning, and the threaded seat (21) and the connecting seat (53) are fixedly connected by the locking bolt (23).

5. The cement-soil mixing wall and steel sheet pile connection structure according to claim 4, characterized in that, The gap between the protruding key (54) and the positioning seat (52) is used to engage the offset rib (62) of the reinforcing rib group (6).

6. The connection structure between a cement-soil mixing wall and steel sheet piles according to claim 2, characterized in that, The steel sheet pile body (2) is fixedly provided with a reinforcing plate seat (4), and a fastening component (7) is provided inside the reinforcing plate seat (4). The fastening component (7) is used to fix the offset rib (62) of the reinforcing rib group (6).

7. The cement-soil mixing wall and steel sheet pile connection structure according to claim 6, characterized in that, The fastening assembly (7) includes a round block (71), a protrusion (72), a toothed rack (73), a linkage gear (74), a transmission gear (75), and a screw (76). The circular block (71) and the transmission gear (75) are fixedly connected by a shaft (77), and the surface of the circular block (71) is provided with the protrusion (72). The toothed rack (73) meshes with the linkage gear (74), and the linkage gear (74) meshes with the transmission gear (75); The screw (76) is threadedly connected to the reinforcing plate seat (4). The end of the screw (76) is provided with a tapered end (761). The tapered end (761) abuts into the inner tapered hole (731) of the toothed strip (73) to drive the toothed strip (73) to slide.

8. A construction method for a cement-soil mixing wall and steel sheet pile connection structure, characterized in that, Includes the following steps: S1: Fix the base plate (5) to the surface of the mixing wall (1) using expansion bolts (51); S2: Using the base plate (5) as a reference, install the steel sheet pile (2) on the base plate (5) to complete the initial connection between the mixing wall (1) and the steel sheet pile (2); S3: A filling layer (3) is set up in the gap between the mixing wall (1) and the sheet pile (2).

9. A construction method for a cement-soil mixing wall and sheet pile connection structure according to claim 8, characterized in that, Before setting up the pouring filling layer (3), the method further includes the step of inserting the reinforcing bar group (6) into the gap between the sheet pile body (2) and the base plate (5).

10. A construction method for a cement-soil mixing wall and sheet pile connection structure according to claim 9, characterized in that: Before inserting the reinforcing bar group (6), the method further includes the step of unfolding the reinforcing bar group (6); After inserting the reinforcing bar assembly (6), the process further includes locking the reinforcing bar assembly (6) by means of a fastening component (7).

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