Box type load bearing column fixing structure

Abstract

The utility model relates to a kind of box type bearing column fixed structure, including prestressed concrete pipe pile and box type bearing column, and the pile of prestressed concrete pipe pile is filled with concrete core, and prestressed concrete pipe pile is provided with reinforcement cage, and the bottom end of reinforcement cage is fixedly installed at the top end of concrete core, and the top end of reinforcement cage extends and exceeds the top of prestressed concrete pipe pile, and the part of reinforcement cage exposed outside prestressed concrete pipe pile constitutes steel bar connecting section, and the top end of prestressed concrete pipe pile is provided with concrete box, and the bottom end of box type bearing column is arranged in concrete box;By using the above technical scheme, a continuous, complete rigid force transmission path from ground pile foundation to upper bearing column is formed, the concrete box provides lateral restraint and support for the box type bearing column, and the reinforcement cage effectively transmits bending moment and tension, and the connection joint of the box type bearing column and the prestressed concrete pipe pile has high connection strength and good seismic and shearing resistance.

Description

Technical Field

[0001] This utility model relates to the technical field of box-type load-bearing columns, and in particular to a fixing structure for box-type load-bearing columns. Background Technology

[0002] In the field of industrial and civil buildings, the connection node between the box-type load-bearing column and the lower prestressed concrete pipe pile is a key part for transferring the upper load.

[0003] Currently, traditional connection methods mostly use welded and bolted connections of foundation plates or exposed steel components. However, these methods often result in indirect and discontinuous force transmission paths, leading to significant stress concentration in the joint area, which affects the overall stiffness and stability of the structure. Furthermore, the seismic and shear resistance of traditional joints often depends on a single force transmission mechanism, making them prone to brittle failure under horizontal loads such as earthquakes or strong winds, and their safety needs to be improved. Therefore, it is necessary to design a box-type load-bearing column fixing structure. Utility Model Content

[0004] The purpose of this utility model is to provide a box-type load-bearing column fixing structure to solve the problems existing in the prior art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A box-type load-bearing column fixing structure includes a prestressed concrete pipe pile and a box-type load-bearing column. The prestressed concrete pipe pile is filled with a concrete core, and a reinforcing cage is installed inside the prestressed concrete pipe pile. The bottom end of the reinforcing cage is fixedly installed on the top end of the concrete core, and the top end of the reinforcing cage extends beyond the top of the prestressed concrete pipe pile. The portion of the reinforcing cage exposed outside the prestressed concrete pipe pile constitutes a reinforcing steel connection section. A concrete box is inserted through the top end of the prestressed concrete pipe pile, and the bottom end of the box-type load-bearing column is inserted inside the concrete box.

[0007] By adopting the above technical solution, prestressed concrete pipe piles are driven into the ground with their tops above the ground. The bottom end of the reinforcing cage is then anchored in the concrete core of the prestressed concrete pipe pile. The top end of the prestressed concrete pipe pile extends upward and passes through the interior of the concrete box. The top end of the reinforcing steel connection section extends upward and exceeds the top of the concrete box. The bottom end of the box-type load-bearing column passes through the reinforcing steel connection section from top to bottom and is inserted into the concrete box. Finally, high-flowability concrete is injected into the concrete box and the reinforcing steel connection section through the box-type load-bearing column, thus forming a continuous and complete rigid force transmission path from the ground pile foundation to the upper load-bearing column. The concrete box provides lateral restraint and support for the box-type load-bearing column, while the reinforcing cage effectively transmits bending moment and tension. Together, they result in high connection strength and good seismic and shear resistance at the connection node between the box-type load-bearing column and the prestressed concrete pipe pile.

[0008] In a further embodiment, the concrete box has a hollow structure inside. The bottom of the concrete box has an upward-facing circular hole, and the top of the concrete box has a downward-facing rectangular hole. Both the circular hole and the rectangular hole are connected to the interior of the concrete box. The interior of the concrete box is provided with a first steel mesh and a second steel mesh at intervals from top to bottom. The first steel mesh has a vertically penetrating clearance opening, and the second steel mesh has a vertically penetrating through hole.

[0009] By adopting the above technical solution, the top of the prestressed concrete pipe pile is inserted into the inside of the concrete box through a circular hole. The top of the steel reinforcement connection section extends to the top of the concrete box by passing through the through hole, the clearance opening and the rectangular hole in sequence. Then, the box-shaped load-bearing column is fixed to the top of the second steel reinforcement mesh by passing through the rectangular hole and the clearance opening in sequence using a robotic arm.

[0010] In a further embodiment, the reinforcing cage includes a bottom plate, longitudinal reinforcing bars and spiral reinforcing bars. Multiple longitudinal reinforcing bars are provided, and the spiral reinforcing bars are fixedly installed on the top of the bottom plate in a vertical direction. The bottom ends of the multiple longitudinal reinforcing bars pass through the spiral reinforcing bars from top to bottom, and the multiple longitudinal reinforcing bars are fixedly installed on the top of the bottom plate.

[0011] By adopting the above technical solution, the steel cage is firmly anchored in the concrete core through the base plate, and the spiral steel bars tighten the longitudinal steel bars to form a whole, thereby enhancing the rigidity and stability of the steel cage.

[0012] In a further embodiment, the inner bottom end face of the concrete box is configured as an arc-shaped surface.

[0013] By adopting the above technical solution, the arc-shaped inner bottom facilitates the flow of cement slurry into the interior of the reinforcing cage.

[0014] In a further embodiment, the top of the concrete box is provided with multiple vent holes.

[0015] By adopting the above technical solution, the bottom end of the box-type load-bearing column is inserted into the concrete box and the steel cage is fitted in place by a robotic arm. Then, high-flow-state concrete is poured down from the top opening of the box-type load-bearing column. The high-flow-state concrete will flow smoothly into the concrete box below from top to bottom, and the air will be smoothly discharged through the vent at the top of the concrete box, thereby ensuring that the poured body is dense and full, gradually filling all the cavities inside the concrete box, and burying the steel reinforcement connection section wrapped in it.

[0016] In a further embodiment, the bottom of the outer wall of the concrete box is provided with outward extension plates, and each extension plate is provided with a plurality of fixing nails in the vertical direction.

[0017] By adopting the above technical solution, the concrete box is further and more stably fixed to the foundation surface using multiple fixing nails.

[0018] In summary, this utility model has the following beneficial effects:

[0019] 1. By driving prestressed concrete pipe piles into the ground with the top of the pipe piles above the ground, and then anchoring the bottom end of the reinforcing cage into the concrete core inside the prestressed concrete pipe piles, the top end of the prestressed concrete pipe piles extends upwards and passes through the interior of the concrete box. The top end of the reinforcing steel connection section extends upwards and exceeds the top of the concrete box. Then, the bottom end of the box-type load-bearing column passes through the reinforcing steel connection section from top to bottom and is inserted into the concrete box. Finally, high-flowability concrete is injected into the concrete box and the reinforcing steel connection section through the box-type load-bearing column, thus forming a continuous and complete rigid force transmission path from the ground pile foundation to the upper load-bearing column. The concrete box provides lateral restraint and support for the box-type load-bearing column, while the reinforcing cage effectively transmits bending moment and tension. Together, they can achieve the effect of high connection strength and good seismic and shear resistance at the connection node between the box-type load-bearing column and the prestressed concrete pipe piles. Attached Figure Description

[0020] Figure 1 This is an overall schematic diagram of the present invention, used to illustrate the structural diagram of the box-type load-bearing column fixing structure;

[0021] Figure 2 This is a sectional view along the vertical direction used to illustrate the overall structure of this utility model;

[0022] Figure 3 This is a schematic diagram illustrating the internal structure of the concrete box of this utility model.

[0023] In the diagram, 1 is a prestressed concrete pipe pile; 2 is a box-type load-bearing column; 3 is a reinforcing cage; 4 is a concrete box; 5 is the first reinforcing mesh; 6 is the second reinforcing mesh; and 7 is a fixing nail. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," and "lower" used in the following description refer to the attached figures. Figure 1In this specification, the terms "bottom surface" and "top surface," "inner" and "outer" refer to the direction toward or away from the geometry of a specific component. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this specification, "a plurality of" means two or more, unless otherwise explicitly and specifically defined by the direction of the center.

[0026] Example 1:

[0027] like Figures 1-3 As shown, a box-type load-bearing column fixing structure includes a prestressed concrete pipe pile 1 and a box-type load-bearing column 2. The prestressed concrete pipe pile 1 is filled with a concrete core. A steel cage 3 is installed inside the prestressed concrete pipe pile 1. The bottom end of the steel cage 3 is fixedly installed on the top end of the concrete core. The top end of the steel cage 3 extends beyond the top of the prestressed concrete pipe pile 1. The part of the steel cage 3 exposed outside the prestressed concrete pipe pile 1 constitutes a steel reinforcement connection section. A concrete box 4 is inserted through the top end of the prestressed concrete pipe pile 1. The bottom end of the box-type load-bearing column 2 is inserted inside the concrete box 4.

[0028] The concrete box 4 has a hollow internal structure. The bottom of the concrete box 4 has an upward-facing circular hole, and the top of the concrete box 4 has a downward-facing rectangular hole. Both the circular and rectangular holes are connected to the interior of the concrete box 4. Inside the concrete box 4, a first reinforcing mesh 5 and a second reinforcing mesh 6 are spaced apart from top to bottom. The first reinforcing mesh 5 has a through-hole extending vertically, and the second reinforcing mesh 6 has a through-hole extending vertically. The reinforcing cage 3 includes a bottom plate, longitudinal reinforcing bars, and spiral reinforcing bars. Multiple longitudinal reinforcing bars are provided, and the spiral reinforcing bars are fixedly installed vertically on the top of the bottom plate. The bottom ends of the multiple longitudinal reinforcing bars pass through the spiral reinforcing bars from top to bottom, and the multiple longitudinal reinforcing bars are fixedly installed on the top of the bottom plate. The inner bottom surface of the concrete box 4 is an arc-shaped surface, and the top surface of the prestressed concrete pipe pile 1 is lower than the inner bottom surface of the concrete box 4. Multiple vent holes are provided at the top of the concrete box 4. Outward-extending extension plates extend around the bottom of the outer wall of the concrete box 4, and multiple fixing nails 7 are inserted vertically through each extension plate.

[0029] The specific implementation process is as follows: First, prestressed concrete pipe piles 1 are driven into the ground, with the top of the prestressed concrete pipe piles 1 higher than the ground surface. Next, a reinforcing cage 3 is installed. The bottom plate of the reinforcing cage 3 firmly anchors the reinforcing cage 3 inside the prestressed concrete pipe pile 1. Spiral reinforcing bars tighten multiple longitudinal reinforcing bars to form a whole, thereby enhancing the rigidity and stability of the reinforcing cage 3. Subsequently, a concrete box 4 is placed on top of the prestressed concrete pipe pile 1. The top of the prestressed concrete pipe pile 1 passes through the round hole at the bottom of the concrete box 4 and enters its interior. The top of the reinforcing bar connection section of the reinforcing cage 3 passes sequentially through the through hole of the second reinforcing mesh 6 inside the concrete box 4, the clearance opening of the first reinforcing mesh 5, and the rectangular hole at the top of the concrete box 4, finally extending to the top of the concrete box 4. Next, using a robotic arm, the box-type load-bearing column 2 is passed sequentially through the rectangular hole at the top of the concrete box 4 and the clearance opening of the first steel mesh 5, so that the bottom end of the box-type load-bearing column 2 is fixed to the top of the second steel mesh 6 and covers the steel connection section. Finally, high-flowability concrete is poured downward from the top opening of the box-type load-bearing column 2. The high-flowability concrete flows from top to bottom into the concrete box 4. The arc-shaped inner bottom of the concrete box 4 guides it to the inner top of the prestressed concrete pipe pile 1. At the same time, the vent hole at the top of the concrete box 4 discharges air to ensure that the pouring is tight and full, filling the cavity inside the concrete box 4 and wrapping the steel connection section. In addition, the fixing nails 7 on the bottom extension plate of the outer wall of the concrete box 4 are driven into the ground to further stabilize and fix it to the foundation surface.

[0030] In the embodiments disclosed in this utility model, the terms "installation," "connection," "linking," and "fixing" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments disclosed in this utility model according to the specific circumstances.

[0031] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A box-type load-bearing column fixing structure, comprising prestressed concrete pipe piles (1) and box-type load-bearing columns (2), characterized in that: The prestressed concrete pipe pile (1) is filled with a concrete core. A steel cage (3) is installed inside the prestressed concrete pipe pile (1). The bottom end of the steel cage (3) is fixedly installed on the top end of the concrete core. The top end of the steel cage (3) extends beyond the top of the prestressed concrete pipe pile (1). The part of the steel cage (3) exposed outside the prestressed concrete pipe pile (1) constitutes a steel connection section. A concrete box (4) is inserted through the top end of the prestressed concrete pipe pile (1). The bottom end of the box-type load-bearing column (2) is inserted inside the concrete box (4).

2. The box-type load-bearing column fixing structure according to claim 1, characterized in that: The concrete box (4) has a hollow structure inside. The bottom of the concrete box (4) is provided with an upward circular hole, and the top of the concrete box (4) is provided with a downward rectangular hole. Both the circular hole and the rectangular hole are connected to the interior of the concrete box (4). The interior of the concrete box (4) is provided with a first steel mesh (5) and a second steel mesh (6) at intervals from top to bottom. The first steel mesh (5) is provided with a clearance opening that runs through from top to bottom, and the second steel mesh (6) is provided with a through hole that runs through from top to bottom.

3. The box-type load-bearing column fixing structure according to claim 1, characterized in that: The steel cage (3) includes a bottom plate, longitudinal steel bars and spiral steel bars. Multiple longitudinal steel bars are provided. The spiral steel bars are fixedly installed on the top of the bottom plate in a vertical direction. The bottom ends of the multiple longitudinal steel bars pass through the spiral steel bars from top to bottom. The multiple longitudinal steel bars are fixedly installed on the top of the bottom plate.

4. The box-type load-bearing column fixing structure according to claim 1, characterized in that: The inner bottom end face of the concrete box (4) is set as an arc surface.

5. The box-type load-bearing column fixing structure according to claim 1, characterized in that: The top of the concrete box (4) is provided with multiple vent holes.

6. The box-type load-bearing column fixing structure according to claim 1, characterized in that: The bottom of the outer wall of the concrete box (4) is surrounded by outward extension plates, and each extension plate is provided with multiple fixing nails (7) in the vertical direction.

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