Concrete sheet pile and revetment sheet pile connection structure

Abstract

The utility model relates to a kind of concrete slab pile and revetment pile slab connecting structure, including pile body and end plate, the pile body has embedded section and pincer section, the end plate is installed in the upper end surface of pincer section;The pincer section has the rectangular slot that is penetrated along end surface radial, and the sector clamping plate formed in the both sides of rectangular slot is separately arranged;The end plate has the sector face that is adapted with the end surface of the both sides sector clamping plate of pincer section, rectangular plate is connected between two sector faces, and the socket that is respectively and with the alignment penetration of pincer section rectangular slot is arranged in the both sides of rectangular plate.The utility model concrete slab pile's pile slab combination place is rectangular hole, the positioning requirement of pile in construction process is lower, and the combination area of pile and slab can be increased, and the combination of slab and pile is more firm.

Description

Technical Field

[0001] This utility model relates to a concrete sheet pile and a sheet pile connection structure for revetment engineering that can be applied to revetment projects, belonging to the field of pile foundation engineering technology for various building structure systems. Background Technology

[0002] With economic development and accelerated urbanization, water conservancy projects in many cities are becoming increasingly important, among which revetment engineering is a crucial component. Traditional revetment structures are made of brick and stone or concrete, which are relatively complex to construct, have long construction periods, and are costly. Furthermore, these structures have some hydraulic performance issues, such as susceptibility to rust and detachment. To address these problems, engineers have begun developing new revetment structures, with pile-slab revetments increasingly being used in revetment projects. Pile-slab revetments, primarily composed of reinforced concrete piles and precast concrete slabs, offer advantages such as short construction periods, good durability, and convenient construction. Therefore, studying the application of pile-slab revetments and exploring their performance and advantages is of great significance for promoting the development of urban revetment engineering and improving the construction quality of water conservancy projects.

[0003] In revetment projects, existing technologies typically use H-type piles or octagonal piles.

[0004] H-type piles, such as Figure 1 As shown, the cross-section is "H-shaped," consisting of two flanges (similar to the horizontal bars of an H) and a central web (the vertical bar of an H). The flanges and web together form a load-bearing skeleton. In some designs, the transition surface between the flanges and the web can be a sloped / circular surface, and the flange corners are often rounded / beveled. Typically, prestressed steel bars (steel strands / bars) + non-prestressed steel bars (for auxiliary bending and shear resistance) are used. The prestressed steel bars are symmetrically distributed along the web within the flanges, ensuring uniform stress on both sides of the pile and eliminating the need for repeated directional adjustments during pile splicing.

[0005] Octagonal stakes Figure 2 As shown, the cross-section is a regular octagon (some designs can be adjusted to an irregular octagon as needed). One end of the pile is a tapered tip (for easy hammering / static pressure driving into the soil), and the other end is a flat, thick end (for connection to the foundation pad / pile cap). The cross-section gradually decreases from the thick end to the tip, making it suitable for small piling equipment. The pile contains 3-5 reinforcing steel bars (circularly distributed), with the same length as the pile body. The spaces between the steel bars are filled with fine aggregate concrete (such as C25). The reinforcing steel bars are usually made of high-strength materials (such as 70# steel bars) to ensure pile strength while controlling costs.

[0006] However, both of the above-mentioned pile types and slab combinations suffer from problems such as insufficient contact area, high requirements for pile positioning, and high production molds and costs. Specifically, the insufficient contact area results in a limited effective force transmission area, making stress concentration more likely and affecting the overall load-bearing capacity and durability of the structure. It may also increase the difficulty of construction positioning due to unstable contact. The high requirements for pile positioning stem from the poor compatibility between the pile body and the slab; even slight deviations can lead to uneven stress at the joint. This not only requires high-precision control during construction (increasing labor time and equipment investment), but may also cause deformation and cracking in later service due to initial deviations. The high production molds and costs are due to the complex design and high precision requirements of irregular cross-section (H-shaped, octagonal) molds, resulting in high mold opening costs. During production, concrete pouring and vibration are difficult (irregular cavities easily lead to non-compactness), increasing the scrap rate. Furthermore, the transportation and hoisting of irregular piles require customized tooling, resulting in high overall costs.

[0007] More specifically, the application of existing technologies in construction has the following drawbacks: 1. When the geological conditions include strongly weathered bedrock or dense sand layers, the construction of the above two types of piles needs to be combined with rotary drilling for pile installation. Since the rotary drilling creates a circular hole, the rotary drilling equipment needs to be selected based on the maximum diagonal length of the pile. This significantly increases the project cost, both in terms of hole formation and backfilling.

[0008] 2. The production of the above two types of piles requires customized molds, which results in low production efficiency and difficulty in popularization, leading to increased costs.

[0009] 3. The pile sheet overlap length is short, which requires high accuracy in pile positioning during construction. The overlap position is a weak point with a small overlap surface, making it prone to damage.

[0010] 4. When constructing a pile-slab joint, the slab needs to be designed to fit the pile at the joint position, and there are few options for the slab.

[0011] In summary, there is an urgent need for a revetment pile-plate connection structure that is low in production cost, high in production efficiency, and simple to construct. Summary of the Invention

[0012] This utility model aims to solve the existing problems of riverbank protection and provides a concrete sheet pile and a connection structure for the sheet pile of the riverbank protection.

[0013] In a first aspect, this utility model discloses a concrete sheet pile, which is configured as a pipe pile structure, including a pile body and an end plate. The pile body has an embedded section and a clamp-shaped section, and the end plate is installed on the upper end face of the clamp-shaped section. The clamp segment has a rectangular slot that extends radially through the end face, and fan-shaped clamps formed on both sides of the rectangular slot. The end plate has fan-shaped surfaces that fit together with the end faces of the fan-shaped clamps on both sides of the clamping section, a rectangular plate connected between the two fan-shaped surfaces, and insertion ports arranged on both sides of the rectangular plate that are aligned and connected to the rectangular slots of the clamping section.

[0014] Furthermore, the concrete sheet pile is a prestressed concrete sheet pile with pre-tensioned concrete strength of C60 and mixed reinforcement to increase the crack resistance and shear resistance of the pile body.

[0015] Furthermore, the rectangular slot of the clamp-shaped section of the pile body is cut and formed along the axial direction of the pile body, and the fan-shaped clamp cut surface is used to form the pile-slab connection surface that is combined with the precast slab.

[0016] Furthermore, the thickness of the rectangular slot of the pincer-shaped segment of the pile body is consistent with the length of the rectangular plate of the end plate in the connection direction.

[0017] Furthermore, the ratio of the embedded section to the clamp-shaped section of the pile body is 1.35:1 to 5:1.

[0018] Furthermore, the cross-section of the embedded section of the pile body is circular.

[0019] Furthermore, the end plate is a rigid structure.

[0020] Furthermore, the end plate surface is provided with end plate holes for anchoring and tensioning prestressed tendons, enhancing the strength of the pile body, and facilitating positioning and assembly.

[0021] Secondly, this utility model discloses a revetment pile-slab connection structure, including the above-mentioned concrete sheet piles and precast slabs. The precast slab is a rectangular precast slab, with both ends inserted into rectangular slots of the concrete sheet pile to achieve pile-slab connection.

[0022] Furthermore, both ends of the precast slab are configured with a single-sided wedge structure.

[0023] Compared with the prior art, the present invention has the following beneficial effects: 1. Compared with the traditional pile-slab combination scheme, the main innovation of this utility model is to set the upper part of the pile body as a clamp-shaped segment, and the rectangular slot in the middle forms a connection surface with the precast slab on the pile body, which increases the contact surface of the pile-slab connection and avoids the stress concentration problem caused by the small contact surface; because the pile-slab connection is a rectangular hole, the positioning requirements of the pile during construction are lower, and the connection area between the pile and the slab can be increased, making the connection between the slab and the pile more solid.

[0024] 2. This utility model is an improvement on the traditional circular pile. When using the construction method for piles, it has a greater economic cost in terms of the selection of construction machinery compared to the traditional pile-slab combination pile. Taking the H-shaped pile with a side length of 500mm, the octagonal pile, and this product with a diameter of 500mm as examples, the H-shaped pile requires a rotary drilling machine with a diameter of 750mm for hole formation, the octagonal pile requires a rotary drilling machine with a diameter of 600mm for hole formation, and this product requires a rotary drilling machine with a diameter of 550mm for hole formation. Among the three pile types, this product has the lowest construction cost.

[0025] 3. This utility model has advantages in production cost because the production mold is modified based on ordinary pipe piles. Compared with the traditional pile production, which requires mold design and new manufacturing, it has advantages in both production difficulty and production cycle, and can be mass-produced. Attached Figure Description

[0026] Figure 1 This is a structural diagram of an existing H-type pile.

[0027] Figure 2 This is a schematic diagram of the structure of an octagonal pile in the prior art.

[0028] Figure 3 This is a structural schematic diagram of the concrete sheet pile of this utility model.

[0029] Figure 4 This is a top view of the concrete sheet pile of this utility model.

[0030] Figure 5 This is a front view of the precast slab of this utility model.

[0031] Figure 6 This is a side view of the precast slab of this utility model. Figure 7 This is an enlarged view of the end plate of the clamp-shaped pile of this utility model.

[0032] Figure 8 This is a cross-sectional view of the clamp-shaped segment of the clamp-shaped pile of this utility model.

[0033] Figure 9 A, B, and C are the top view, front view, and top view of the precast slab of this utility model, respectively.

[0034] Figure 10 This is a top view of the pile-slab connection diagram.

[0035] Figure 11 This is the front view of the pile-slab connection diagram. Detailed Implementation

[0036] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0037] Example 1 This embodiment relates to a concrete sheet pile, see [link / reference] Figures 3-10 ,in particular Figure 3 , Figure 4 The concrete sheet pile of this embodiment includes a pile body 2 and an end plate 1 disposed on the pile body 2.

[0038] The pile body 2 is configured as a pipe pile structure, which is functionally divided into upper and lower sections, including an upper clamp-shaped section and a lower embedded section. The ratio of the embedded section to the clamp-shaped section is 1.35:1 to 5:1, for example, 2:1, 3:1, 4:1, etc., to ensure that the upper clamp-shaped section provides sufficient plate support surface, and the lower embedded section maintains the foundation embedment stability of the circular cross-section. The embedded section is used to embed into the foundation to provide stable support, and its cross-section is circular; the clamp-shaped section is used for pile-plate connection, including a rectangular slot 4 in the middle and fan-shaped clamps on both sides. The rectangular slot 4 is axially cut downwards along the upper end surface of the pile body 2, so that the cross-section of the clamp-shaped section has a special shape of two fan-shaped sections with a rectangular hole in the middle, such as... Figure 8 As shown, the rectangular slot 4 between the two fan-shaped clamps is through on both sides and preferably symmetrical, for inserting prefabricated panels.

[0039] The end plate 1 is a rigid structure, disposed on the upper end face of the clamp-shaped section of the pile body 2 to enhance the integrity of the pile body 2. It has two fan-shaped surfaces adapted to the upper end face of the clamp-shaped section of the pile body 2, and a rectangular plate connecting the two fan-shaped surfaces. It also includes notches cut on both sides of the rectangular plate, which are preferably symmetrical, for alignment and connection with the rectangular slots 4 on both sides of the clamp-shaped section of the pile body 2. End plate holes 5 are pre-drilled on the surface of the end plate 1, and these holes 5 are located on the two fan-shaped surfaces, such as... Figure 7 As shown, these holes are used for anchoring and tensioning prestressed tendons, thereby enhancing pile strength. They also facilitate positioning and assembly, such as for hoisting positioning pins. The number of end plate holes is determined based on the number of prestressed steel bars.

[0040] Example 2 This embodiment relates to a revetment pile-slab connection structure, which includes the concrete sheet piles described in Embodiment 1, and a precast slab 3 connecting two adjacent sheet piles.

[0041] The structure of the concrete sheet pile is as described in Example 1, and will not be repeated in this example.

[0042] The precast slab 3 is a rectangular precast slab, such as... Figure 5 , Figure 6 and Figure 9 As shown, both ends of the precast slab 3 are wedge-shaped to facilitate the insertion of the precast slab 3 into the rectangular slot 4 of the concrete sheet pile. The front part of the precast slab 3 is recessed into the slab body to achieve a landscape effect.

[0043] This embodiment describes a revetment sheet pile connection structure. During construction, precast concrete sheet piles are driven into designated locations (parallel to the foundation). The lower embedded section of the pile body 2 is buried in the foundation, while the upper pincer-shaped section of the pile body 2 protrudes above the ground. The spacing between two pile bodies 2 is adapted to the length of the precast slab 3. Each pair of adjacent sheet piles is connected by inserting the pincer-shaped sections of the pile body 2 into both sides of the precast slab 3. The precast slab 3 is horizontally inserted into the rectangular slots 4 of the pile bodies 2 on both sides. The precast concrete sheet piles and the precast slab 3 form an integral whole, presenting a continuous "pile-slab-pile" structure, forming a continuous revetment wall. After this connection, the precast slab 3 and the inner wall of the rectangular slot 4 of the pile body 2 fit tightly together, increasing the effective contact area between the precast slab 3 and the sheet pile, and improving the overall integrity. The top can be reinforced with a cap beam or by grouting. Figure 10 and Figure 11 As shown. Specifically, the capping beam reinforcement treatment involves pouring a continuous reinforced concrete beam (i.e., the capping beam) transversely over the top of all piles to connect the dispersed piles into a whole, thereby coordinating the stress, preventing single pile displacement, and evenly transmitting water and soil pressure. Grouting reinforcement involves high-pressure injection of cement-based grout into the pile-slab joints (the gap between the insertion hole and the precast slab) to fill the voids and solidify, blocking the water seepage path and protecting the piles from erosion.

[0044] In summary, this utility model solves the problems of high cost and difficult positioning of irregular piles by using a circular pile body and a clamp-shaped modified end. The matching of the rectangular slot with the precast slab significantly improves construction efficiency and structural reliability.

[0045] This utility model is not limited to the embodiments discussed above. The above description of specific embodiments is intended to describe and illustrate the technical solutions involved in this utility model. Obvious variations, substitutions, or combinations based on the teachings of this utility model should also be considered to fall within the protection scope of this utility model. The above specific embodiments are used to disclose the best implementation method of this utility model, so that those skilled in the art can apply various embodiments and alternative methods of this utility model to achieve the purpose of this utility model.

Claims

1. A concrete sheet pile configured as a pipe pile structure, characterized in that, It includes a pile body and an end plate, wherein the pile body has an embedded section and a clamp-shaped section, and the end plate is installed on the upper end face of the clamp-shaped section; The clamp segment has a rectangular slot that extends radially through the end face, and fan-shaped clamps formed on both sides of the rectangular slot. The end plate has fan-shaped surfaces that fit together with the end faces of the fan-shaped clamps on both sides of the clamping section, a rectangular plate connected between the two fan-shaped surfaces, and insertion ports arranged on both sides of the rectangular plate that are aligned and connected to the rectangular slots of the clamping section.

2. A concrete sheet pile as described in claim 1, characterized in that, The concrete sheet piles are prestressed concrete sheet piles with pretensioning method, concrete strength C60, and mixed reinforcement to increase the crack resistance and shear resistance of the pile body.

3. A concrete sheet pile as described in claim 1, characterized in that, The rectangular slot of the clamp-shaped section of the pile body is cut along the axial direction of the pile body and is radially continuous. The fan-shaped clamp plate is cut to form the pile-slab connection surface that is combined with the precast slab.

4. A concrete sheet pile as described in claim 1, characterized in that, The thickness of the rectangular slot in the pincer-shaped section of the pile body is consistent with the length of the rectangular plate of the end plate in the connection direction.

5. A concrete sheet pile as described in claim 1, characterized in that, The ratio of the embedded section to the clamp-shaped section of the pile body is 1.35:1 to 5:

1.

6. A concrete sheet pile as described in claim 1, characterized in that, The cross-section of the embedded section of the pile body is circular.

7. A concrete sheet pile as described in claim 1, characterized in that, The end plate is a rigid structure.

8. A concrete sheet pile as described in claim 7, characterized in that, The end plate surface has pre-drilled holes for anchoring and tensioning prestressed tendons, enhancing pile strength, and facilitating positioning and assembly.

9. A revetment pile-slab connection structure, characterized in that, Includes the concrete sheet piles as described in any one of claims 1-8, and precast slabs; The precast slab is a rectangular precast slab, with both ends inserted into rectangular slots of the concrete sheet pile to achieve pile-slab connection.

10. A revetment pile-slab connection structure as described in claim 9, characterized in that, Both ends of the precast slab are configured with a single-sided wedge structure.

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