A steel pipe pile cofferdam construction support and positioning device

Abstract

This utility model discloses a support and positioning device for steel pipe pile cofferdam construction, belonging to the technical field of steel pipe pile cofferdam construction. It includes a steel pipe cofferdam body, which comprises multiple steel pipe piles tightly connected together to form a cofferdam. The steel pipe cofferdam body has a rectangular structure, and an I-shaped external support positioning plate is attached to each outer side of the steel pipe cofferdam body. Support positioning frames are fixedly attached to the inner walls of the steel pipe cofferdam body. The upper part of each I-shaped external support positioning plate is hung in the top cavity of an adjacent steel pipe pile through multiple L-shaped hook plates. The bottom of each I-shaped external support positioning plate extends and is inserted into the foundation below the steel pipe cofferdam body through at least two pile foundation support anchor assemblies. This utility model enhances the overturning resistance of the cofferdam and improves the structural stability of the cofferdam during construction.

Description

Technical Field

[0001] This utility model belongs to the field of steel pipe pile cofferdam construction technology, and in particular, it is a support and positioning device for steel pipe pile cofferdam construction. Background Technology

[0002] In modern construction engineering, especially in bridge foundations, deep foundation pit support, and water conservancy projects, steel pipe pile cofferdam construction support and positioning devices are widely used as a key temporary water-retaining structure to create a dry working environment. This device typically includes a cofferdam body formed by a close arrangement of multiple steel pipe piles, and a series of auxiliary components to enhance its stability and precise position control. Steel pipe pile cofferdams not only need to withstand external water flow pressure and lateral soil pressure, but also must provide sufficient internal space to accommodate construction machinery and personnel, ensuring the safe and efficient progress of the project. However, traditional steel pipe pile cofferdam designs often suffer from insufficient rigidity, easy deformation, and complex installation, making it difficult to meet increasingly complex geological conditions and stringent construction requirements.

[0003] Traditional steel pipe pile cofferdams often employ simple spliced ​​steel pipe pile structures, lacking an effective external support system. They rely solely on the lateral force resistance of the steel pipe piles driven into the foundation to maintain stability. Furthermore, due to the lack of synergistic effect between top suspension and bottom anchoring, cofferdams are highly susceptible to tilting or displacement when subjected to external forces such as water flow impact, soil pressure, or construction vibration. Utility Model Content

[0004] The purpose of this utility model is to provide a support and positioning device for steel pipe pile cofferdam construction to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a steel pipe pile cofferdam construction support and positioning device, comprising a steel pipe cofferdam body, wherein the steel pipe cofferdam body comprises multiple steel pipe piles tightly connected together to form a cofferdam body, the steel pipe cofferdam body has a rectangular structure, and an I-shaped external support positioning plate is attached to each outer side of the steel pipe cofferdam body, such that the multiple I-shaped external support positioning plates are attached to each peripheral outer wall of the steel pipe cofferdam body, and a support positioning frame is fixedly attached between the inner walls of the steel pipe cofferdam body, the upper part of each I-shaped external support positioning plate is hung in the top cavity of the adjacent steel pipe pile through multiple L-shaped upper hook plates, such that each I-shaped external support positioning plate can be securely hung on the steel pipe pile through the L-shaped upper hook plates, and the bottom of each I-shaped external support positioning plate is extended and inserted into the foundation below the steel pipe cofferdam body through at least two pile foundation support anchor rod assemblies.

[0006] In this preferred embodiment, each of the I-shaped external support positioning plates includes a lower support plate, an upper support plate, and a connecting support plate welded between the lower support plate and the upper support plate.

[0007] In this preferred embodiment, the inner wall of the lower support plate is fitted to the bottom outer wall of the supporting and positioning steel pipe pile, and the inner wall of the upper support plate is fitted to the top outer wall of the supporting and positioning steel pipe pile.

[0008] In this preferred embodiment, both ends of each of the lower support plates are fixedly connected to the adjacent steel pipe piles by a first locking bolt, and an arc-shaped connecting rod is welded between two adjacent lower support plates and two adjacent upper support plates.

[0009] In this preferred embodiment, the end of the upper hook plate of the L-shaped structure away from the steel pipe pile is fixedly connected to the top of the upper support plate by a second locking bolt, and the end of the upper hook plate of the L-shaped structure away from the upper support plate is inserted into the inner cavity of the steel pipe pile.

[0010] In this preferred embodiment, each of the connecting support plates has an outer rib plate symmetrically welded to its outer wall, and each of the inner walls of the support positioning frame has an inner rib plate welded to its inner wall.

[0011] In this preferred embodiment, both the outer rib and the inner rib are triangular in shape and supported on the foundation below the steel pipe cofferdam, so that the outer rib and the inner rib clamp and support the steel pipe cofferdam for positioning.

[0012] In this preferred embodiment, each of the pile foundation support anchor rod assemblies includes support anchor rods longitudinally welded to both ends of the bottom surface of the support lower plate, multiple support branch rods arranged in a ring array welded to the lower peripheral outer wall of the support anchor rods, and support rings welded to the free ends of the multiple support branch rods.

[0013] In a preferred embodiment of this scheme, the pile foundation support anchor assembly further includes at least four branch anchor rods welded in a ring array to the bottom surface of the support ring. The branch anchor rods and the support anchor rods are all inserted into the foundation and solidified by concrete pouring.

[0014] Compared with the prior art, the technical effects and advantages of this utility model are as follows:

[0015] This steel pipe pile cofferdam construction support and positioning device, through the design of attaching I-shaped external support positioning plates to each outer side of the steel pipe cofferdam body, forms a stable lateral support on the outside of the cofferdam, thereby enhancing the cofferdam's anti-overturning capacity and improving the structural stability of the cofferdam during construction. The I-shaped structure has excellent mechanical properties; its upper and lower flanges and web work together to effectively transfer horizontal loads, preventing the cofferdam from tilting or displacing due to water flow impact or earth pressure.

[0016] The design of the top support structure, which is positioned by the I-shaped external support and hung on the upper part of the L-shaped hook plate in the top cavity of the adjacent steel pipe pile, enables the top support structure to be quickly installed and disassembled. This facilitates construction operations, improves construction efficiency and operational flexibility, and eliminates the need for complex welding or bolting processes. It allows for rapid positioning and fixing, making it suitable for construction environments that require frequent adjustments to the support position, and greatly shortens the construction cycle.

[0017] The design, which uses an I-shaped external support positioning plate with a pile foundation support anchor assembly inserted into the foundation, provides the entire support system with reliable vertical anchoring capability. This achieves deep fixation of the cofferdam structure, preventing subsidence or slippage. The anchor assembly, deeply embedded in the foundation and combined with concrete pouring, provides strong pull-out and shear resistance, effectively maintaining the long-term stability of the cofferdam structure, especially in soft soil foundations or underwater environments. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the installation structure of the L-shaped hook plate of this utility model;

[0021] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A;

[0022] Figure 4 This is a structural schematic diagram of the pile foundation support anchor assembly of this utility model.

[0023] Explanation of reference numerals in the attached figures:

[0024] In the diagram: 1. Steel pipe cofferdam body; 2. Steel pipe pile; 3. I-shaped external support positioning plate; 4. Support lower plate; 5. Support upper plate; 6. First locking bolt; 7. Pile foundation support anchor rod assembly; 8. Outer rib plate; 9. Support positioning frame; 10. Inner rib plate; 11. Connecting support plate; 12. L-shaped upper hook plate; 13. Second locking bolt; 14. Arc-shaped connecting rod; 15. Support anchor rod; 16. Support ring body; 17. Support branch rod; 18. Branch anchor rod body. Detailed Implementation

[0025] In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be practiced without one or more of these details. In other instances, certain technical features well-known in the art have not been described in order to avoid confusion with the present invention.

[0026] Unless otherwise defined, the directions mentioned herein, such as up, down, left, right, front, back, inside, and outside, are based on the directions shown in the figures of this utility model, and are explained here together.

[0027] This embodiment provides, for example Figures 1 to 4 The diagram illustrates a steel pipe pile cofferdam construction support and positioning device, comprising a steel pipe cofferdam body 1. The steel pipe cofferdam body 1 consists of multiple steel pipe piles 2 tightly connected together to form a cofferdam body. The steel pipe cofferdam body 1 has a rectangular structure, and I-shaped external support positioning plates 3 are attached to each outer side of the steel pipe cofferdam body 1, so that multiple I-shaped external support positioning plates 3 are attached to each peripheral outer wall of the steel pipe cofferdam body 1. Support positioning frames 9 are fixedly attached to the inner walls of the steel pipe cofferdam body 1. Through the design of the support positioning frames 9 fixedly attached to the inner walls of the steel pipe cofferdam body 1, the internal structure has good spatial support capacity, realizing the effective reinforcement function of the central area of ​​the cofferdam, and achieving the ability to improve the overall structural rigidity and resistance to internal and external pressure differences. This frame not only enhances the spatial rigidity inside the cofferdam, but also provides a support platform for the installation of subsequent construction equipment or formwork systems, further improving the convenience of construction. The upper part of each I-shaped external support positioning plate 3 is hung in the top cavity of the adjacent steel pipe pile 2 through multiple L-shaped upper hook plates 12, so that each I-shaped external support positioning plate 3 can be fastened to the steel pipe pile 2 through the L-shaped upper hook plates 12. The bottom of each I-shaped external support positioning plate 3 is extended and inserted into the foundation below the steel pipe cofferdam body 1 through at least two pile foundation support anchor rod assemblies 7.

[0028] In this embodiment, each I-shaped external support positioning plate 3 includes a lower support plate 4, an upper support plate 5, and a connecting support plate 11 welded between the lower support plate 4 and the upper support plate 5.

[0029] In this embodiment, the inner wall of the lower support plate 4 is attached to the bottom outer wall of the supporting and positioning steel pipe pile 2, and the inner wall of the upper support plate 5 is attached to the top outer wall of the supporting and positioning steel pipe pile 2.

[0030] In this embodiment, both ends of each lower support plate 4 are fixedly connected to the adjacent steel pipe pile 2 by the first locking bolt 6. An arc-shaped connecting rod 14 is welded between two adjacent lower support plates 4 and two adjacent upper support plates 5. The design of connecting adjacent support structures through the arc-shaped connecting rod 14 makes the support system form a continuous spatial force network, realizes the function of structural collaborative force bearing, and achieves the effect of improving the overall seismic performance and wind load resistance. The arc-shaped structure can not only disperse concentrated stress, but also absorb some vibration energy. When facing dynamic effects such as earthquakes and wind loads, it exhibits superior structural response characteristics.

[0031] In this embodiment, the end of the L-shaped upper hook plate 12 furthest from the steel pipe pile 2 is fixedly connected to the top of the upper support plate 5 via the second locking bolt 13, and the other end of the L-shaped upper hook plate 12 furthest from the upper support plate 5 is inserted into the inner cavity of the steel pipe pile 2. The structural design of the L-shaped upper hook plate 12 and the second locking bolt 13 in conjunction allows the top suspension structure to possess adjustability and high connection strength, achieving adaptability to steel pipe piles 2 of different heights. This enhances versatility and on-site adaptability. This design allows for fine-tuning of the hook position according to actual construction needs, ensuring a firm and reliable connection between components, while also accommodating the requirements of standardized production and flexible on-site installation.

[0032] In this embodiment, each connecting support plate 11 has an outer rib plate 8 symmetrically welded to its outer wall, and each inner wall of the support positioning frame 9 has an inner rib plate 10 welded to its inner wall. Through the design of the support positioning frame 9, the inner rib plate 10, and the outer rib plate 8 on the connecting support plate 11 working together, the inner and outer support systems form a clamping force structure, realizing the function of bidirectional constraint on the deformation of the cofferdam and achieving the effect of improving the overall resistance to lateral displacement. Although the main function of the support positioning frame 9 is internal reinforcement, its combined application with the inner and outer rib plates shows a significant "clamping effect" in actual force analysis. That is, when subjected to lateral pressure, the inner and outer rib plates clamp the cofferdam structure from both sides to prevent local bulging or instability.

[0033] In this embodiment, both the outer rib plate 8 and the inner rib plate 10 are triangular structures and are supported on the foundation below the steel pipe cofferdam body 1, so that the outer rib plate 8 and the inner rib plate 10 clamp, support and position the steel pipe cofferdam body 1.

[0034] In this embodiment, each pile foundation support anchor assembly 7 includes a support anchor 15 longitudinally welded to both ends of the bottom surface of the support lower plate 4, multiple support branch rods 17 in a ring array welded to the lower peripheral outer wall of the support anchor 15, and a support ring 16 welded to the free ends of the multiple support branch rods 17.

[0035] In this embodiment, the pile foundation support anchor assembly 7 also includes at least four branch anchor rods 18 welded in a ring array to the bottom surface of the support ring 16. The branch anchor rods 18 and the support anchor rods 15 are all inserted into the foundation and solidified by concrete pouring.

[0036] Working principle

[0037] The steel pipe pile cofferdam construction support and positioning device involves leveling the foundation at the construction site, clearing debris and loose soil to ensure a firm ground, using a total station to accurately lay out the position of the steel pipe cofferdam, marking the outline of the cofferdam, and then driving multiple steel pipe piles 2 into the foundation in sequence according to the layout line using a pile driver to form a rectangular enclosure structure. The steel pipe piles are closely arranged and welded together to form a stable steel pipe cofferdam body 1.

[0038] The I-shaped external support positioning plate 3 is attached to the outer wall of each side of the steel pipe cofferdam 1. The I-shaped structure consists of a lower support plate 4, an upper support plate 5, and a connecting support plate 11, which plays a role in lateral force transmission. The lower support plate 4 is attached to the bottom end of the steel pipe pile 2, and the upper support plate 5 is attached to the top end, which improves the overall stability.

[0039] One end of the hook plate 12 on L is inserted into the top cavity of the adjacent steel pipe pile 2, and the other end is connected to the upper support plate 5 through the second locking bolt 13 to achieve the suspension and fixation of the top. This design can effectively prevent the cofferdam structure from shifting laterally. The first locking bolt 6 is set at both ends of the lower support plate 4 to be fastened to the adjacent steel pipe pile 2, which enhances the integrity and anti-slip ability of the bottom structure. The arc-shaped connecting rod 14 is welded between the adjacent lower support plate 4 and the upper support plate 5 to form a ring connection structure, which improves the spatial stiffness and seismic performance of the entire support system. The support positioning frame 9 is installed inside the steel pipe cofferdam body 1 to enhance the stability of the internal structure of the cofferdam. Multiple inner ribs 10 are welded on the inner wall of the frame, which work together with the outer ribs 8 to clamp the cofferdam structure.

[0040] The outer rib plate 8 is welded to the outside of the connecting support plate 11, forming a triangular structure. The inner rib plate 10 is welded to the inner wall of the support positioning frame 9. Both are supported on the foundation, forming an inner and outer clamping effect to improve the overall anti-overturning capacity. At least two pile foundation support anchor rod assemblies 7 are installed at the bottom of each I-shaped outer support positioning plate 3. The support anchor rod 15 is vertically welded to both ends of the bottom surface of the support lower plate 4 and extends into the foundation. The support ring body 16 is located at the bottom of the anchor rod. Multiple support branch rods 17 are arranged in a ring to expand the force-bearing area. The branch anchor rod body 18 extends downward from the bottom of the support ring body 16 and inserts into the deeper foundation. After all the anchor rod structures are inserted into the foundation, high-strength concrete is poured around them. After the concrete solidifies, a stable anchor foundation is formed to prevent the cofferdam structure from sinking or tilting.

[0041] After the cofferdam construction is completed, the hook plate 12, locking bolts 6, support anchor bolt assembly 7 and other parts on L will be gradually removed. The steel pipe pile 2 can be removed or retained as part of the permanent structure according to the needs of subsequent projects.

[0042] It should be noted that, in this document, relational terms such as "one" and "two" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0043] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A support and positioning device for steel pipe pile cofferdam construction, comprising a steel pipe cofferdam body (1), characterized in that: The steel pipe cofferdam body (1) includes multiple steel pipe piles (2) tightly connected together to form a cofferdam body, and an I-shaped external support positioning plate (3) is attached to each outer side of the steel pipe cofferdam body (1), so that multiple I-shaped external support positioning plates (3) are attached to each peripheral outer wall of the steel pipe cofferdam body (1), and a support positioning frame (9) is fixedly attached between the inner walls of the steel pipe cofferdam body (1); the upper end of the steel pipe pile (2) is detachably fixed to the upper part of the I-shaped external support positioning plate (3), and the bottom of each I-shaped external support positioning plate (3) is extended and inserted into the foundation below the steel pipe cofferdam body (1) through at least two pile foundation support anchor rod assemblies (7).

2. The steel pipe pile cofferdam construction support positioning device according to claim 1, characterized in that: The upper end of the steel pipe pile (2) can be detachably fixed to the upper part of the I-shaped external support positioning plate (3). Specifically, the upper part of each I-shaped external support positioning plate (3) is hung in the top cavity of the adjacent steel pipe pile (2) by multiple L-shaped upper hook plates (12), so that each I-shaped external support positioning plate (3) can be securely hung on the steel pipe pile (2) by the L-shaped upper hook plates (12).

3. The steel pipe pile cofferdam construction support positioning device according to claim 1, characterized in that: Each of the aforementioned I-shaped external support positioning plates (3) includes a lower support plate (4), an upper support plate (5), and a connecting support plate (11) welded between the lower support plate (4) and the upper support plate (5).

4. The steel pipe pile cofferdam construction support positioning device according to claim 3, characterized in that: The inner wall of the lower support plate (4) is attached to the bottom outer wall of the support positioning steel pipe pile (2), and the inner wall of the upper support plate (5) is attached to the top outer wall of the support positioning steel pipe pile (2).

5. The steel pipe pile cofferdam construction support positioning device according to claim 4, characterized in that: Both ends of each of the lower support plates (4) are fixedly connected to the adjacent steel pipe piles (2) by the first locking bolts (6), and arc-shaped connecting rods (14) are welded between the two adjacent lower support plates (4) and the two adjacent upper support plates (5).

6. The steel pipe pile cofferdam construction support positioning device according to claim 5, characterized in that: The end of the upper hook plate (12) away from the steel pipe pile (2) is fixedly connected to the top of the upper support plate (5) by the second locking bolt (13), and the end of the upper hook plate (12) away from the upper support plate (5) is inserted into the inner cavity of the steel pipe pile (2).

7. The steel pipe pile cofferdam construction support positioning device according to claim 6, characterized in that: Each of the connecting support plates (11) has an outer rib plate (8) symmetrically welded to its outer wall, and each of the support positioning frames (9) has an inner rib plate (10) welded to its inner wall.

8. The steel pipe pile cofferdam construction support and positioning device according to claim 7, characterized in that: The outer rib (8) and inner rib (10) are both triangular in shape and supported on the foundation below the steel pipe cofferdam (1), so that the outer rib (8) and inner rib (10) clamp, support and position the steel pipe cofferdam (1).

9. The steel pipe pile cofferdam construction support positioning device according to claim 1, characterized in that: Each of the pile foundation support anchor rod assemblies (7) includes a support anchor rod (15) longitudinally welded to both ends of the bottom surface of the support lower plate (4), multiple support branch rods (17) in a ring array welded to the lower peripheral outer wall of the support anchor rod (15), and a support ring (16) welded to the free end of the multiple support branch rods (17).

10. The steel pipe pile cofferdam construction support positioning device according to claim 9, characterized in that: The pile foundation support anchor assembly (7) also includes at least four branch anchor rods (18) welded in a ring array to the bottom surface of the support ring (16). The branch anchor rods (18) and the support anchor rods (15) are all inserted into the foundation and solidified by concrete pouring.

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