Fabricated connecting structure of prefabricated pipe pile and prefabricated bearing platform

Abstract

The utility model relates to an assembly type connecting structure of a prefabricated pipe pile and a prefabricated bearing platform, and belongs to the technical field of civil engineering. Comprising a prefabricated pipe pile, a prefabricated bearing platform and a prefabricated anchor bolt, an end plate is fixedly connected to the top end of the prefabricated pipe pile, a reinforcement cage is fixedly connected to the interior of the prefabricated bearing platform, a pipe pile inserting opening is formed in the lower surface of the prefabricated bearing platform, a bearing platform reserved hole is formed in the prefabricated bearing platform, and the bearing platform reserved hole communicates with the pipe pile inserting opening and penetrates through the prefabricated bearing platform from top to bottom; the shape of the bearing platform reserved hole is matched with the shape of the prefabricated anchor bolt, concrete grouting materials are filled in gaps between the bearing platform reserved hole and the prefabricated anchor bolt and between the tubular pile inserting opening and the prefabricated anchor bolt, a prefabricated nut base plate is placed on the portion, above a bolt of the prefabricated anchor bolt, of the prefabricated bearing platform, and the top end of a screw of the prefabricated anchor bolt is connected with a prefabricated nut. Compared with a heavy excavation foundation and a cast-in-place bearing platform, the influence of construction on the surrounding environment is reduced, the construction period is shortened, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering, in particular to an assembled connection structure of a prefabricated pipe pile and a prefabricated cap. Background Art

[0002] Pile foundations are deep foundations consisting of pipe piles and caps. Currently, excavation-based foundations with on-site concrete pouring are the primary method used in pile foundation construction. This type of pile foundation requires on-site formwork erection, steel bar tying, mixing, and large-scale concrete pouring. This type of foundation has drawbacks such as high overall cost, extensive excavation, long construction periods, and environmental risks. Utility Model Content

[0003] In order to solve the above technical problems, the present invention provides an assembled connection structure of prefabricated pipe piles and prefabricated caps. The technical solution of the present invention is as follows:

[0004] A prefabricated connection structure of a prefabricated pipe pile and a prefabricated pedestal, which includes a prefabricated pipe pile, a prefabricated pedestal and a prefabricated anchor bolt. The top of the prefabricated pipe pile is fixedly connected to an end plate, the inside of the prefabricated pedestal is fixedly connected to a steel cage, the lower surface of the prefabricated pedestal is provided with a pipe pile socket, and a pedestal reserved hole is provided on the prefabricated pedestal. The pedestal reserved hole is connected to the pipe pile socket and passes through the prefabricated pedestal from top to bottom. The shape of the pedestal reserved hole matches the shape of the prefabricated anchor bolt. The gap between the pedestal reserved hole, the pipe pile socket and the prefabricated anchor bolt is filled with concrete grouting material. A prefabricated nut pad is placed on the prefabricated pedestal above the bolt of the prefabricated anchor bolt. The top of the screw rod of the prefabricated anchor bolt is connected to a prefabricated nut, and the prefabricated nut is located above the prefabricated nut pad.

[0005] Optionally, the reserved hole of the support platform is in the shape of an I-shape.

[0006] Optionally, the top surface height of the prefabricated nut is lower than the top surface height of the prefabricated foundation, and the area around the prefabricated nut is filled with concrete grouting material.

[0007] Optionally, the concrete grouting material is UHPC.

[0008] Optionally, the prefabricated anchor bolts are welded to the end plates.

[0009] Optionally, a plurality of reinforcing steel bars are evenly and fixedly connected to the interior of the prefabricated pipe pile along the circumference.

[0010] All the above optional technical solutions can be combined arbitrarily, and the present utility model does not provide detailed descriptions of the structures after the combinations.

[0011] By means of the above solution, the beneficial effects of the present invention are as follows:

[0012] By arranging prefabricated pipe piles, prefabricated caps, prefabricated foundation anchor bolts, prefabricated nut pads and prefabricated nuts, and opening cap reserved holes on the prefabricated caps, the prefabricated foundation anchor bolts are welded to the end plates on the tops of the prefabricated pipe piles during assembly, and the cap reserved holes are aligned with the screw rods extending from the prefabricated foundation anchor bolts for hoisting. After the prefabricated caps are hoisted to the corresponding position, concrete grouting material is filled in the gaps between the cap reserved holes and the prefabricated foundation anchor bolts and the pipe pile sockets, and after the concrete grouting material is initially solidified, the prefabricated nut pads are placed on the top of the prefabricated caps to disperse the stress, and The prefabricated connection between the prefabricated foundation and the prefabricated pipe pile can be completed by screwing in the prefabricated nut. Compared with large excavation foundation and cast-in-place foundation, the utility model adopts prefabricated pipe piles and prefabricated foundation and adopts prefabricated connection, which reduces the impact of construction on the surrounding environment, reduces the work of on-site formwork, tying steel bars, mixing and large-volume concrete pouring, and eliminates the need to wait for the curing time of large-volume concrete, reduces the amount of concrete poured on site, greatly shortens the construction period, reduces construction costs, and improves the mechanized construction efficiency and foundation quality level of the line foundation.

[0013] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention and to implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is the main view of the present utility model.

[0015] Figure 2 It is a top view of the present utility model.

[0016] The accompanying drawings are:

[0017] 1- Prefabricated nuts, 2- Reserved holes for the pedestal, 3- Prefabricated nut pads, 4- Prefabricated pedestal, 5- Prefabricated anchor bolts, 6- Rebar cage, 7- End plates, 8- Prefabricated pipe piles. DETAILED DESCRIPTION

[0018] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0019] like Figure 1 and Figure 2As shown, the assembled connection structure of prefabricated pipe piles and prefabricated foundations provided by the embodiment of the present invention includes prefabricated pipe piles 8, prefabricated foundations 4 and prefabricated anchor bolts 5. The top of the prefabricated pipe piles 8 is fixedly connected to the end plate 7, and the inside of the prefabricated foundations 4 is fixedly connected to the steel cage 6. The lower surface of the prefabricated foundation 4 is provided with a pipe pile socket, and the prefabricated foundation 4 is provided with a foundation reserved hole 2. The foundation reserved hole 2 is connected to the pipe pile socket and passes through the prefabricated foundation 4 from top to bottom. The shape of the foundation reserved hole 2 matches the shape of the prefabricated anchor bolt 5, and the gap between the foundation reserved hole 2 and the pipe pile socket and the prefabricated anchor bolt 5 is filled with concrete grouting material. A prefabricated nut pad 3 is placed on the prefabricated foundation 4 above the bolt of the prefabricated anchor bolt 5, and the top of the screw of the prefabricated anchor anchor 5 is connected with a prefabricated nut 1, and the prefabricated nut 1 is located above the prefabricated nut pad 3.

[0020] Specifically, the prefabricated anchor bolts 5 are welded to the end plates 7 .

[0021] It should be noted that when the position of the prefabricated anchor bolt 5 conflicts with the steel cage 6 , it is necessary to drill a hole in the steel cage 6 to facilitate the passage of the prefabricated anchor bolt 5 .

[0022] The embodiment provides a method for assembling a connection structure of a prefabricated pipe pile and a prefabricated cap, comprising the following steps:

[0023] A. The prefabrication plant completes the production of prefabricated caps 4, prefabricated pipe piles 8, prefabricated anchor bolts 5 and their matching prefabricated nut pads 3 and prefabricated nuts 1 of predetermined dimensions, and transports the prefabricated concrete components to the construction site after they reach the designed strength.

[0024] B. After the pile body of the prefabricated pipe pile 8 is processed, the prefabricated pipe pile 8 is hoisted and the verticality of the prefabricated pipe pile 8 is checked before the pile is sunk. After the prefabricated pipe pile 8 is penetrated into the ground to the designated position, the prefabricated foundation anchor bolt 5 is welded to the end plate 7 at the top of the prefabricated pipe pile 8. At this time, the welding position can be flexibly adjusted according to the pile position in the soil, which can make it easier to connect with the reserved hole 2 of the cap.

[0025] C. After the welding of the prefabricated foundation anchor 5 is completed, align the reserved hole 2 of the prefabricated foundation 4 with the screw extending from the prefabricated foundation anchor 5 and hoist it to the corresponding position. Fill the gap between the reserved hole 2 of the foundation and the prefabricated foundation anchor 5 and the pipe pile socket with concrete grouting material. After the concrete grouting material is initially solidified, place a prefabricated nut pad 3 on the top of the prefabricated foundation 4 to disperse the stress and prevent the concrete on the contact surface between the prefabricated foundation 4 and the prefabricated nut 1 from being locally crushed. Screw in the prefabricated nut 1 and finally fix the position of the prefabricated foundation 4. At this point, the assembled connection between the prefabricated foundation 4 and the prefabricated pipe pile 8 is completed.

[0026] In another embodiment, the cap reserved hole 2 is shaped like an I. The upper horizontal portion of the I-shaped cap reserved hole 2 accommodates the precast nut 1, the vertical portion of the I-shaped cap reserved hole 2 accommodates the bolt of the precast anchor 5, and the lower horizontal portion of the I-shaped cap reserved hole 2 accommodates the head of the precast anchor 5. The I-shaped cap reserved hole 2 is not only easy to process but also facilitates subsequent filling with concrete grout.

[0027] In another embodiment, the top surface height of the prefabricated nut 1 is lower than the top surface height of the prefabricated base 4, and the prefabricated nut 1 is filled with concrete grouting material so that the surface of the prefabricated base 4 embedded with the prefabricated nut 1 is flat.

[0028] In another embodiment, the concrete grouting material is UHPC. UHPC has higher bonding strength and shorter setting time, which improves the stability of the prefabricated connection structure while shortening the construction period.

[0029] In another embodiment, a plurality of reinforcing steel bars are evenly fixedly connected along the circumference of the interior of the prefabricated pipe pile 8. The reinforcing steel bars can improve the overall stability of the prefabricated pipe pile 8.

[0030] In another embodiment, both sides of the prefabricated pipe pile 8 and the prefabricated foundation 4 are fixedly connected with lifting connectors, and are connected to external equipment through the lifting connectors during lifting.

[0031] The assembled connection structure of the prefabricated pipe pile and the prefabricated cap provided by the utility model has the following characteristics:

[0032] (1) The prefabricated connection method is adopted. Each prefabricated pipe pile 8 only needs to be equipped with a prefabricated anchor bolt 5. The component is stable, reliable and easy to obtain. The connection only uses welding and pouring a small volume of concrete grouting material. The structural connection is simple and easy to construct, which reduces the construction cost.

[0033] (2) The traditional large excavation foundation and cast-in-place pedestal are replaced with prefabricated pipe piles 8 and prefabricated pedestal 4, which reduces the impact of construction on the surrounding environment, reduces the work of on-site formwork, tying steel bars, mixing and large-volume concrete pouring, and eliminates the need to wait for the curing time of large-volume concrete, thus greatly reducing the construction period.

[0034] (3) The use of prefabricated connection structure makes the integrity of the structure almost the same as that of the whole cast-in-place structure. In addition, the construction accuracy requirements are low while ensuring the stability of the connection. The on-site construction difficulty is small, which further reduces the construction period, improves the construction efficiency, and saves construction costs.

[0035] (4) Currently, we have a mature prefabricated component processing technology, which ensures the quality and stability of the prefabricated pipe piles 8, prefabricated foundations 4 and prefabricated anchor bolts 5 prefabricated in the factory, further improving the construction quality.

[0036] (5) The prefabricated connection structure is designed by welding prefabricated foundation anchor bolts 5, so that when the connecting parts are welded to the end plates 7 of the prefabricated pipe piles 8 after piling, the positions of the prefabricated foundation anchor bolts 5 can be flexibly changed according to the pile positions, so as to better connect with the reserved holes 2 of the pedestal of the prefabricated pedestal 4, thereby avoiding the problem that the pipe piles are constrained by the soil and cannot move freely after piling, resulting in the inability to accurately connect with the reserved holes 2 of the pedestal.

[0037] (6) The utility model has the advantages of high efficiency, speed, convenience and reliability.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. An assembled connection structure of a prefabricated pipe pile and a prefabricated cap, characterized in that: The invention comprises a prefabricated pipe pile (8), a prefabricated foundation (4) and a prefabricated foundation anchor bolt (5), wherein the top of the prefabricated pipe pile (8) is fixedly connected with an end plate (7), the interior of the prefabricated foundation (4) is fixedly connected with a steel cage (6), the lower surface of the prefabricated foundation (4) is provided with a pipe pile socket, the prefabricated foundation (4) is provided with a foundation reserved hole (2), the foundation reserved hole (2) is connected with the pipe pile socket and passes through the prefabricated foundation (4) from top to bottom, and the foundation reserved hole The shape of the hole (2) matches the shape of the prefabricated anchor bolt (5); the gap between the reserved hole (2) of the pedestal and the pipe pile socket and the prefabricated anchor bolt (5) is filled with concrete grouting material; a prefabricated nut pad (3) is placed on the prefabricated pedestal (4) above the bolt of the prefabricated anchor bolt (5); the top end of the screw rod of the prefabricated anchor bolt (5) is connected to the prefabricated nut (1), and the prefabricated nut (1) is located above the prefabricated nut pad (3).

2. The assembled connection structure of prefabricated pipe piles and prefabricated caps according to claim 1 is characterized in that: The reserved hole (2) of the support platform is in the shape of an I-shape.

3. The assembled connection structure of prefabricated pipe piles and prefabricated caps according to claim 1 is characterized in that: The top surface height of the prefabricated nut (1) is lower than the top surface height of the prefabricated support (4), and the area around the prefabricated nut (1) is filled with concrete grouting material.

4. The assembled connection structure of prefabricated pipe piles and prefabricated caps according to claim 1 is characterized in that: The concrete grouting material is UHPC.

5. The assembled connection structure of prefabricated pipe piles and prefabricated caps according to claim 1 is characterized in that: The prefabricated foundation anchor bolt (5) is welded to the end plate (7).

6. The assembled connection structure of prefabricated pipe piles and prefabricated caps according to claim 1 is characterized in that: The interior of the prefabricated pipe pile (8) is evenly and fixedly connected with a plurality of reinforcing steel bars along the circumference.

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