Cofferdam structure with PC combined construction method piles
By setting up a reinforcement mechanism in the PC combined pile cofferdam structure, the deformation problem caused by insufficient rigidity and strength when the existing cofferdam is opened to traffic is solved, and higher cofferdam stability and overall performance are achieved.
Patent Information
- Application Number
- CN202421640255.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-29
- Estimated Expiration
- 2034-07-11
AI Technical Summary
The existing double-layer pile-draft cofferdam is likely to cause cofferdam deformation due to insufficient rigidity and strength when the upper part is opened to traffic.
The PC combined pile cofferdam structure is adopted, and the connection and support between the piles are enhanced and the stability of the cofferdam is improved by setting up reinforcement mechanisms, including steel purlins, beam covers, bamboo fences, clay layers and concrete pavement layers.
The structure between piles is effectively stabilized, the deformation of the cofferdam when it is opened to traffic is avoided, and the overall rigidity and strength of the cofferdam are improved.
Smart Images
Figure CN222810050U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cofferdams, in particular to a PC combined construction method pile cofferdam structure. Background Art
[0002] A cofferdam refers to a temporary retaining structure built during the construction of a water conservancy project to build permanent water conservancy facilities. Its function is to prevent water and soil from entering the construction site of the building, so as to drain water in the cofferdam, excavate the foundation pit, and build buildings. Among them, the PC combination method pile cofferdam is the most commonly used sheet pile cofferdam. The predecessor of the PC (Pipe-Combination, steel pipe pile combination) method pile is the Larsen steel sheet pile. Due to the small cross-sectional rigidity of the Larsen steel sheet pile, it is used in deep foundation pit retaining projects. It requires a multi-layer support and anchor structure, which is difficult to construct and affects the construction period. Therefore, the PC method pile came into being. The PC method pile is a combination of seamless steel pipes and Larsen steel sheet piles, which can effectively improve the cross-sectional rigidity. The steel sheet pile is a kind of steel with a lock. Its cross-section includes straight plate, groove and Z shape, etc., with various sizes and interlocking forms. The common ones are Larsen type and Lackawanna type. Its advantages are: high strength and easy to drive into hard soil layers; it can be constructed in deep water with good waterproof performance; it can form cofferdams of various shapes as needed, and can be reused many times, with a wide range of uses.
[0003] The currently common double-layer pile cofferdam lacks connection and support structures. When the upper part is open to traffic, the cofferdam is easily deformed due to insufficient rigidity and strength. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model provides a PC combined construction method pile cofferdam structure, which solves the problems mentioned in the above background.
[0005] The utility model provides the following technical solution: a PC combined construction method pile cofferdam structure, comprising: two rows of piles, a reinforcement mechanism is arranged between the two rows of piles;
[0006] The reinforcement mechanism includes two steel purlins and multiple connecting beam cover plates. The back surfaces of the two rows of piles are respectively connected to the surfaces of the two steel purlins. The multiple connecting beam cover plates are all connected to the tops of the two steel purlins, and the multiple connecting beam cover plates are arranged parallel to each other. The opposite surfaces of the two rows of piles are connected with bamboo fence boards. A clay layer is arranged between the two bamboo fence boards. A concrete pavement layer is paved on the tops of the two rows of piles and the clay layer.
[0007] Preferably, the row of piles comprises a plurality of steel pipe piles and a plurality of steel sheet piles, the plurality of steel pipe piles and the plurality of steel sheet piles are staggered, and the surfaces of the steel pipe piles are connected to the surfaces of the steel sheet piles.
[0008] The distance between two rows of piles is 4m.
[0009] The bottoms of the two steel purlins are both connected with a plurality of bracket brackets.
[0010] Preferably, the top of the steel purlin is welded to the surface of the connecting beam cover plate, and the spacing between adjacent connecting beam cover plates is 2.2m.
[0011] Preferably, the bottom of the steel purlin is welded to the surface of the bracket corbel, and the spacing between adjacent bracket corbels is 3m.
[0012] Compared with the prior art, the utility model has the following beneficial effects:
[0013] The PC combined construction method pile cofferdam structure is provided with a reinforcement mechanism, and steel purlins are nested and installed on the outer walls of the two rows of piles. A plurality of connecting beam cover plates are installed on the upper part of the steel purlins to stabilize the position between the two rows of piles, and bamboo fences are installed and fixed between the two rows of piles, and then filled with high-quality clay to form a clay layer. A concrete pavement layer is laid on the high-quality clay, so that the structure between the two rows of piles is stable and not easily deformed when traffic is open. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model.
[0015] Figure 2 It is a schematic diagram of the elevation structure of the utility model.
[0016] Figure 3 It is a schematic diagram of the top structure of the utility model.
[0017] In the figure: 1. row of piles; 101. steel sheet piles; 102. steel pipe piles; 2. steel purlins; 3. bracket corbels; 4. connecting beam cover plates; 5. bamboo fence boards; 6. clay soil layer; 7. river; 8. pond residue; 9. concrete pavement layer. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0019] See also Figure 1-3The PC combined construction method pile cofferdam structure comprises: two rows of piles 1, a reinforcement mechanism is arranged between the two rows of piles 1, the reinforcement mechanism comprises two steel purlins 2 and a plurality of connecting beam covers 4, the back surfaces of the two rows of piles 1 are respectively connected to the surfaces of the two steel purlins 2, the plurality of connecting beam covers 4 are all connected to the tops of the two steel purlins 2, and the plurality of connecting beam covers 4 are arranged parallel to each other, the opposite surfaces of the two rows of piles 1 are connected with bamboo fences 5, a clay layer 6 is arranged between the two bamboo fences 5, and a concrete pavement layer 9 is paved on the tops of the two rows of piles 1 and the clay layer 6.
[0020] The row of piles 1 includes a plurality of steel pipe piles 102 and a plurality of steel sheet piles 101, the plurality of steel pipe piles 102 are staggered with the plurality of steel sheet piles 101, and the surface of the steel pipe piles 102 is connected to the surface of the steel sheet piles 101, the spacing between two rows of piles 1 is 4m, the steel pipe piles 102 and the steel sheet piles 101 are both existing equipment, for example, a steel pipe pile 102 of model φ630×14 is used, and the steel sheet pile 101 uses a Larsen steel sheet pile 101 of model SP-U400×170×15.5, the steel pipe pile 102 is 14m long, and the Larsen steel sheet pile 101 is 12m long, the pile top elevation of the non-crossing area of the connecting beam cover plate 4 is 0.4m lower than the pile top elevation of the crossing area of the steel connecting beam cover plate 4, and a plurality of bracket brackets 3 are connected to the bottom of the two steel purlins 2.
[0021] The top of the steel purlin 2 is welded to the surface of the connecting beam cover plate 4. The steel purlin 2 is made of double-piece steel with a model of H400×400×13×21. The connecting beam cover plate 5 is made of steel with a model of H400x400x13x21. The spacing between adjacent connecting beam cover plates 4 is 2.2m.
[0022] The bottom of the steel purlin 2 is welded to the surface of the bracket corbel 3, and the distance between adjacent bracket corbels 3 is 3m.
[0023] One of the rows of piles 1 is located on the river 7 side, and the other row of piles 1 is located on the pond slag side. Steel purlins 2 are nested and installed on the outer walls of the two rows of piles 1. Multiple connecting beam cover plates 4 are installed on the upper part of the steel purlins 2 to stabilize the position between the two rows of piles 1. Bamboo fences 5 are installed and fixed between the two rows of piles 1, and then filled with high-quality clay to form a clay layer 6. A concrete pavement layer 9 is laid on the high-quality clay, so that the structure between the two rows of piles 1 is stable and not easily deformed when traffic is open.
[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. The PC combined construction method pile cofferdam structure is characterized by: include: Two rows of piles (1), with a reinforcement mechanism being arranged between the two rows of piles (1); The reinforcement mechanism comprises two steel purlins (2) and a plurality of connecting beam covers (4); the divergent surfaces of the two rows of piles (1) are respectively connected to the surfaces of the two steel purlins (2); the plurality of connecting beam covers (4) are all connected to the tops of the two steel purlins (2); and the plurality of connecting beam covers (4) are arranged parallel to each other; the opposite surfaces of the two rows of piles (1) are connected to bamboo fences (5); a clay layer (6) is arranged between the two bamboo fences (5); and a concrete pavement layer (9) is paved on the tops of the two rows of piles (1) and the clay layer (6).
2. The PC combined construction method pile cofferdam structure according to claim 1 is characterized in that: The row of piles (1) comprises a plurality of steel pipe piles (102) and a plurality of steel sheet piles (101), wherein the plurality of steel pipe piles (102) and the plurality of steel sheet piles (101) are arranged in an alternating manner, and the surface of the steel pipe piles (102) is connected to the surface of the steel sheet piles (101).
3. The PC combined construction method pile cofferdam structure according to claim 2 is characterized in that: The distance between the two rows of piles (1) is 4m.
4. The PC combined construction method pile cofferdam structure according to claim 2 is characterized in that: The bottoms of the two steel purlins (2) are both connected with a plurality of bracket brackets (3).
5. The PC combined construction method pile cofferdam structure according to claim 4 is characterized in that: The top of the steel purlin (2) is welded to the surface of the connecting beam cover plate (4), and the distance between adjacent connecting beam cover plates (4) is 2.2 m.
6. The PC combined construction method pile cofferdam structure according to claim 5 is characterized in that: The bottom of the steel purlin (2) is welded to the surface of the bracket corbel (3), and the distance between adjacent bracket corbels (3) is 3m.