A connection structure between prestressed pipe piles and pile caps

Abstract

This utility model provides a connection structure between a prestressed concrete pipe pile and a pile cap. The connection structure includes: a pipe pile body and a pile cap located in the upper half of the pipe pile body. A support plate is installed inside the pile cap, and a filler core is installed on the top of the support plate. The upper half of the filler core is located inside the pile cap. A rigid ring is fitted onto the upper half of the pipe pile body and fixedly connected by wedges. The rigid ring is fixedly connected to the pile cap, and multiple reinforcing bars are fixedly installed on the outer wall of the rigid ring. The connection structure between the prestressed concrete pipe pile and the pile cap provided by this utility model can effectively improve the connection strength between the pipe pile and the pile cap, avoiding the problem of unstable connection due to reliance solely on concrete bonding force. Simultaneously, by increasing the connection area between the pipe pile body and the pile cap, the pull-out bearing capacity of the overall structure can be improved, solving the problem of reduced pull-out bearing capacity due to insufficient bonding force between new and old concrete during pull-out testing.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and in particular relates to a connection structure between a prestressed pipe pile and a pile cap. Background Technology

[0002] Column foundations are generally formed by connecting piles and a pile cap. Their main function is to provide foundation positioning and support for the column base. The structural performance of the column foundation determines the connection rigidity and strength of the upper column base. Therefore, special attention should be paid to the structural performance of the connection between the piles and the pile cap during construction. Prestressed concrete hollow pipe piles have advantages such as short construction period and low cost, and have been widely used in engineering.

[0003] Chinese invention patent CN219886905U discloses a connection structure between a pile cap and a prestressed concrete pipe pile. The entire pile cap is prefabricated in a factory. Pre-drilled holes are pre-set in the pile cap according to the pile and column positions. The size of the pre-drilled holes is the pile diameter + 200mm. The mold for the pre-drilled holes needs to be uneven, so that the inner wall of the pre-drilled holes is uneven, in order to improve the stability between the pile cap and the concrete pipe pile. The number and size of the lifting rings are calculated and set for on-site hoisting of the pile cap. This utility model, by prefabricating the pile cap in the factory and setting several pre-drilled holes inside the pile cap, can realize the rapid connection between the concrete pipe pile and the pile cap. It can effectively solve the problems of long construction cycle and labor shortage, and greatly improve the construction quality and construction safety performance, which is more in line with the requirements of 'green building' under the new situation.

[0004] However, there are still shortcomings in the above structure. The bonding force of the connection method is highly dependent on the roughness of the inner wall of the pipe pile. The rougher the inner wall of the pipe pile, the higher the bonding force. However, the inner walls of the pipe piles used in the project are relatively smooth. During the pull-out test, the pull-out bearing capacity is often greatly reduced due to insufficient bonding force between the new and old concrete.

[0005] Therefore, it is necessary to provide a new connection structure between prestressed pipe piles and pile caps to solve the above-mentioned technical problems. Utility Model Content

[0006] The technical problem solved by this utility model is to provide a prestressed pipe pile and pile cap connection structure that can effectively improve the connection strength between the pipe pile body and the pile cap, avoid the problem of unstable connection due to relying solely on concrete bonding force, and ensure good connection performance even when the inner wall of the pipe pile is relatively smooth. At the same time, by increasing the connection area between the pipe pile body and the pile cap, the pull-out bearing capacity of the overall structure can be improved, which can solve the problem of reduced pull-out bearing capacity due to insufficient bonding force between new and old concrete in pull-out testing.

[0007] To solve the above-mentioned technical problems, the connection structure between the prestressed pipe pile and the pile cap provided by this utility model includes: a pipe pile body and a pile cap located in the upper half of the pipe pile body, a support plate installed in the pile cap, a filler core installed on the top of the support plate, and the upper half of the filler core located in the pile cap. The upper half of the pipe pile body is fitted with a rigid ring and fixedly connected by wedges. The rigid ring is fixedly connected to the pile cap. Multiple reinforcing bars are fixedly installed on the outer wall of the rigid ring, and all the reinforcing bars are located inside the pile cap.

[0008] As a further embodiment of this utility model, the foundation is formed by on-site casting of concrete.

[0009] As a further embodiment of this utility model, the inner wall of the pipe pile body is provided with an internal thread, which is located above the top of the support plate.

[0010] As a further embodiment of this utility model, the pallet includes, but is not limited to, a steel plate with a thickness of 4-6 mm.

[0011] As a further embodiment of this utility model, a concrete cushion layer is fixedly installed around the upper half of the pipe pile body, and the concrete cushion layer is located at the bottom of the pile cap.

[0012] Compared with related technologies, the connection structure between the prestressed pipe pile and the pile cap provided by this utility model has the following advantages: This utility model, by setting a combination structure of rigid ring and wedge, can effectively improve the connection strength between the pipe pile body and the pile cap, and can avoid the problem of unstable connection caused by relying solely on concrete bonding force. Even when the inner wall of the pipe pile is relatively smooth, it can ensure good connection performance. This utility model enhances the structural strength of the foundation by setting multiple steel bars on the rigid ring. These steel bars are tightly integrated with the concrete inside the foundation, which also makes the connection between the rigid ring and the foundation more secure, thereby improving the stability of the entire connection structure. This utility model provides support by setting up a support plate and a core filler. The upper half of the core filler is located inside the pile cap, which increases the connection area between the pipe pile and the pile cap, improves the pull-out bearing capacity of the overall structure, and solves the problem of reduced pull-out bearing capacity due to insufficient bonding between new and old concrete in pull-out testing. Attached Figure Description

[0013] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0014] Figure 1 This is a front view structural diagram of the present utility model; Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ; Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0015] In the diagram: 1. Pipe pile body; 2. Pipe cap; 3. Support plate; 4. Filler core; 5. Rigid ring; 6. Reinforcing bar; 7. Internal thread; 8. Concrete cushion layer. Detailed Implementation

[0016] Please refer to the following: Figure 1 , Figure 2 and Figure 3 ,in, Figure 1 This is a front sectional view of the connection structure between the prestressed pipe pile and the pile cap of this utility model. Figure 2 for Figure 1 A magnified structural diagram of part A in the middle; Figure 3 This is a side sectional view of the connection structure between the prestressed pipe pile and the pile cap of this utility model. The connection structure between the prestressed pipe pile and the pile cap includes: a pipe pile body 1 and a pile cap 2 located in the upper half of the pipe pile body 1. A support plate 3 is installed inside the pile cap 2, and a filler core 4 is installed on the top of the support plate 3. The upper half of the filler core 4 is located inside the pile cap 2. By setting up a support plate and a core filler, the upper half of the core filler is located inside the pile cap, which increases the connection area between the pipe pile and the pile cap, improves the overall structure's pull-out bearing capacity, and solves the problem of reduced pull-out bearing capacity due to insufficient bonding between new and old concrete in pull-out testing.

[0017] The upper half of the pipe pile body 1 is fitted with a rigid ring 5 and fixedly connected by wedges. The rigid ring 5 is fixedly connected to the pile cap 2. Multiple reinforcing bars 6 are fixedly installed on the outer wall of the rigid ring 5, and the multiple reinforcing bars 6 are all located inside the pile cap 2.

[0018] By setting a combination structure of rigid ring and wedge, the connection strength between the pipe pile and the pile cap can be effectively improved, avoiding the problem of unstable connection caused by relying solely on concrete bonding force. Even when the inner wall of the pipe pile is relatively smooth, good connection performance can be guaranteed.

[0019] By incorporating multiple reinforcing bars on the rigid ring, these bars are tightly bonded to the concrete inside the foundation, enhancing the structural strength of the foundation itself and making the connection between the rigid ring and the foundation more robust, thereby improving the stability of the entire connection structure. The foundation 2 is formed by on-site casting of concrete.

[0020] The inner wall of the pipe pile body 1 is provided with an internal thread 7, which is located above the top of the support plate 3.

[0021] The pallet 3 includes, but is not limited to, a steel plate with a thickness of 4-6 mm.

[0022] A concrete cushion layer 8 is fixedly installed around the upper half of the pipe pile body 1, and the concrete cushion layer 8 is located at the bottom of the pile cap 2.

[0023] The working principle of the connection structure between the prestressed pipe pile and the pile cap provided by this utility model is as follows: First step: Drive the pipe pile 1 into the designated position according to the design requirements. Fit a rigid ring 5 on the upper half of the pipe pile 1 and fix the two together with wedges to ensure that the rigid ring 5 and the pipe pile 1 are tightly connected and there will be no relative displacement. At the same time, fix and install a concrete pad 8 around the upper half of the pipe pile 1 to provide a solid and flat foundation for the subsequent pouring of the foundation 2. The second step is to install a support plate 3 inside the pipe pile body 1. The support plate 3 can be made of 4-6mm thick steel plate to make it stable in a suitable position inside the pipe pile body 1. Then, a filler core 4 is set on the top of the support plate 3, so that the upper half of the filler core 4 extends into the area where the foundation 2 will be poured, thereby enhancing the overall connection between the pipe pile body 1 and the foundation 2. The third step: Arrange the multiple reinforcing bars 6 fixedly installed on the outer wall of the rigid ring 5 according to the design requirements, and then pour concrete on site to form the foundation 2. During the pouring process, the concrete will wrap the upper half of the support plate 3, the upper half of the filler core 4, the rigid ring 5, and the multiple reinforcing bars 6. After the concrete solidifies, the foundation 2 and the pipe pile body 1 form a solid integral structure through these connecting components (the filler core 4 is made of high-strength micro-expansion concrete, which can significantly enhance the overall connection between the pipe pile body 1 and the foundation 2. Since its lower half is located inside the pipe pile body 1 and its upper half extends into the foundation 2, it acts like a "connector" to tightly connect the two), thus further improving the stability of the connection.

[0024] All standard parts used can be purchased from the market, and can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The machinery, parts and equipment adopt conventional models in the existing technology, and the structure and principle of the components known to those skilled in the art can be known by those skilled in the art through technical manuals or conventional experimental methods.

[0025] 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, or they can be used directly or indirectly, without departing from the principles and spirit of the present invention. In other related technical fields, the scope of the present invention is defined by the appended claims and their equivalents, and they are similarly included within the patent protection scope of the present invention.

Claims

1. A connection structure between a prestressed pipe pile and a pile cap, comprising a pipe pile body and a pile cap located in the upper half of the pipe pile body, characterized in that, A support plate is installed inside the bearing platform, and a filler core is installed on the top of the support plate. The upper half of the filler core is located inside the bearing platform. The upper half of the pipe pile body is fitted with a rigid ring and fixedly connected by wedges. The rigid ring is fixedly connected to the pile cap. Multiple reinforcing bars are fixedly installed on the outer wall of the rigid ring, and all the reinforcing bars are located inside the pile cap.

2. The connection structure between the prestressed pipe pile and the pile cap according to claim 1, characterized in that: The foundation was formed by on-site casting of concrete.

3. The connection structure between the prestressed pipe pile and the pile cap according to claim 1, characterized in that: The inner wall of the pipe pile body is provided with internal threads, which are located above the top of the support plate.

4. The connection structure between the prestressed pipe pile and the pile cap according to claim 1, characterized in that: The pallet includes, but is not limited to, a steel plate with a thickness of 4-6 mm.

5. The connection structure between the prestressed pipe pile and the pile cap according to claim 1, characterized in that: A concrete cushion layer is fixedly installed around the upper half of the pipe pile body, and the concrete cushion layer is located at the bottom of the pile cap.

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