Prefabricated supporting structure filled with concrete

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By filling concrete in the factory and forming a prefabricated support structure into the steel pipe, the problem of inconvenient disassembly and small bearing capacity in the existing technology is solved, and an efficient and environmentally friendly foundation pit support effect is achieved.

CN222575505UActive Publication Date: 2025-03-07SOUTH CHINA AGRICULTURAL UNIVERSITY +1

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Patent Information

Application Number: CN202421283573.5
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-06-05
Publication Date: 2025-03-07
Estimated Expiration: 2034-06-05

AI Technical Summary

Technical Problem

In the prior art, the support structure is inconvenient for disassembly and has a small bearing capacity, making it difficult to meet the foundation pit support needs.

Method used

A prefabricated support structure filled with concrete is used to form a prefabricated structure by filling concrete in the factory and forming a prefabricated structure into the steel pipe, avoiding on-site casting, and making prefabricated support blocks in sections, which are connected in sequence to form a single-line structure.

Benefits of technology

It realizes the easy disassembly and assembly of the support structure and high bearing capacity, improves construction efficiency, and solves the problems of slow construction, uneco-friendly construction of traditional support and low bearing capacity.

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Abstract

The utility model discloses a prefabricated supporting structure filled with concrete, which comprises a plurality of prefabricated supporting blocks which are sequentially, detachably and fixedly connected to form a linear structure, each prefabricated supporting block comprises two connecting blocks which are oppositely arranged and a plurality of steel pipes which are arranged between the two connecting blocks which are oppositely arranged and are parallel to each other at uniform intervals, and each steel pipe is filled with concrete, so that the concrete can be filled into the steel pipes in a factory, cast-in-place is not needed, and the construction efficiency is improved. One end of each steel pipe located in the same prefabricated supporting block is fixedly connected with one connecting block, and the other end of each steel pipe is fixedly connected with the other connecting block. The two adjacent connecting blocks between every two adjacent prefabricated supporting blocks are detachably and fixedly connected, all the connecting blocks are perpendicular to the length direction of the linear structure, all the steel pipes are parallel to the length direction of the linear structure, the multiple prefabricated supporting blocks are manufactured in a segmented mode, during connection, the splicing efficiency is high, hoisting is convenient, reutilization can be achieved, and the bearing capacity of the whole structure is high.

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Description

Technical Field

[0001] The utility model belongs to the technical field of foundation pit support, and in particular relates to a prefabricated support structure filled with concrete. Background Art

[0002] At present, the foundation pit of the underground structure of urban buildings often adopts the method of retaining structure + internal support. Compared with anchor cables and anchor rods, internal support has the advantages of high rigidity, better control of foundation pit deformation, and wide applicability of strata. Traditional supports are divided into two forms: cast-in-place reinforced concrete support and steel support. Cast-in-place reinforced concrete support has the advantages of high rigidity and high bearing capacity, but its implementation requires strong work such as tying steel bars, erecting formwork, pouring, etc., and the construction is slow. Moreover, the structure needs to be broken when it is rebuilt, which is time-consuming and labor-intensive, and is not environmentally friendly. Steel support has the advantages of convenient erection, low cost, and recyclability, but its rigidity and bearing capacity are relatively small, and it is not suitable for foundation pits with large forces or strict deformation control.

[0003] Therefore, a new technology is needed to solve the problem that the supporting structure in the prior art is difficult to disassemble and assemble and has a small bearing capacity. Utility Model Content

[0004] In order to solve the above problems in the prior art, the utility model provides a prefabricated support structure filled with concrete, which has the effects of being easy to disassemble and assemble and having a large bearing capacity.

[0005] The utility model adopts the following technical solutions:

[0006] A prefabricated support structure filled with concrete, comprising a plurality of prefabricated support blocks which are detachably fixedly connected in sequence and are in a straight line structure, each of the prefabricated support blocks comprising two oppositely arranged connection blocks, and a plurality of steel pipes which are parallel to each other and evenly spaced between the two oppositely arranged connection blocks, each of the steel pipes being filled with concrete, and each of the steel pipes in the same prefabricated support block having one end fixedly connected to one of the connection blocks and the other end fixedly connected to another of the connection blocks;

[0007] The two connecting blocks close to each other between two adjacent prefabricated support blocks are detachably fixedly connected, each connecting block is perpendicular to the length direction of the I-shaped structure, and each steel pipe is parallel to the length direction of the I-shaped structure.

[0008] As a further improvement of the technical solution of the utility model, the two prefabricated support blocks located at the ends are respectively detachably fixedly connected to the two oppositely arranged underground continuous walls in the foundation pit, and each of the underground continuous walls is provided with a waist beam on the side close to the foundation pit, and the two connecting blocks located at the two ends are respectively detachably fixedly connected to the corresponding two oppositely arranged waist beams.

[0009] As a further improvement of the technical solution of the utility model, a plurality of anchor bars are arranged in the waist beam, and each of the anchor bars extends out of the outer surface of the waist beam and is detachably fixedly connected to one of the connecting blocks.

[0010] As a further improvement of the technical solution of the utility model, the cross-sectional dimension of each connecting block is larger than the total cross-sectional dimension of the plurality of steel pipes connected thereto.

[0011] As a further improvement of the technical solution of the utility model, the connecting block is a connecting flange.

[0012] As a further improvement of the technical solution of the utility model, it also includes a plurality of connecting plates, at least four of which are spaced around the side of a prefabricated support block, and one side of each of the connecting plates is fixedly connected to the side of at least two of the steel pipes.

[0013] As a further improvement of the technical solution of the utility model, each of the prefabricated support blocks has four steel pipes arranged in an array, and each of the prefabricated support blocks has a square cross-section perpendicular to the direction of the I-shaped structure. The four steel pipes are respectively located at the four corners of the square, and the two ends of each connecting plate are respectively detachably fixedly connected to two adjacent steel pipes.

[0014] As a further improvement of the technical solution of the utility model, the longitudinal section of the steel pipe is square.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] This solution adopts a structure of precast concrete filled in square steel tubes. Concrete can be filled into the steel tubes in the factory to form a precast structure without on-site pouring, which effectively improves construction efficiency. The precast support structure filled with concrete in this solution is divided into several precast support blocks, and several precast support blocks are connected in sequence to form the precast support structure filled with concrete in this solution. The overall structure after assembly has a large bearing capacity, high assembly efficiency, and is easy to disassemble and assemble, which improves construction efficiency. It can solve the problems of slow construction and environmental pollution of conventional concrete supports, as well as low bearing capacity of steel supports. It has the advantages of high bearing capacity and convenient lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The technology of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0018] Figure 1 is a longitudinal section of a prefabricated support block;

[0019] Figure 2 It is a cross-sectional view of the connection node between the steel pipe and the connecting flange;

[0020] Figure 3 It is the main view of the prefabricated support block;

[0021] Figure 4 It is a schematic diagram of the connection structure between the overall structure of the utility model and the waist beam.

[0022] Reference numerals:

[0023] 1- prefabricated support block; 11- steel pipe; 12- concrete filling; 13- connection plate; 14- connection flange; 15- bracket;

[0024] 2-Underground continuous wall;

[0025] 3- waist beam; 31- anchor bar. DETAILED DESCRIPTION

[0026] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the utility model, so as to fully understand the purpose, scheme and effect of the utility model. It should be noted that the embodiments and features in the embodiments in this application can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0027] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it can be directly fixed or connected to the other feature, or it can be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the accompanying drawings.

[0028] Reference Figures 1 to 4 A prefabricated support structure filled with concrete, comprising a plurality of prefabricated support blocks 1 which are detachably fixedly connected in sequence to form a straight-line structure, and the two prefabricated support blocks 1 located at the ends are detachably fixedly connected to two oppositely arranged underground continuous walls 2 in the foundation pit. Each of the prefabricated support blocks 1 comprises two oppositely arranged connection blocks, and a plurality of parallel and evenly spaced steel pipes 11 located between the two oppositely arranged connection blocks. One end of each of the steel pipes 11 located in the same prefabricated support block 1 is fixedly connected to one of the connection blocks, and the other end is fixedly connected to the other connection block; the two connection blocks close to each other between two adjacent prefabricated support blocks 1 are detachably fixedly connected, and each of the connection blocks is perpendicular to the length direction of the straight-line structure, and each of the steel pipes 11 is parallel to the length direction of the straight-line structure. Concrete filling 12 is provided in each of the steel pipes 11, that is, the square tube is filled with concrete, and the concrete can preferably be ultra-high-strength concrete.

[0029] Both ends of each prefabricated support block 1 are fixed with a connecting block, and both ends of each steel pipe 11 are fixedly connected to the two connecting blocks respectively. The two connecting blocks close to each other on the two adjacent prefabricated support blocks 1 in the horizontal direction are detachably fixedly connected, and the two connecting blocks located at both ends of the prefabricated support block 1 are detachably fixedly connected to the underground continuous wall 2 on both sides of the foundation pit. This scheme adopts a structure in which prefabricated concrete is filled in a square steel pipe 11. Concrete can be filled 12 into the steel pipe 11 in the factory to form a prefabricated structure without on-site pouring, which effectively improves construction efficiency. The prefabricated support structure filled with concrete of this scheme is divided into several prefabricated support blocks 1, and several prefabricated support blocks 1 are connected in sequence to form the prefabricated support structure filled with concrete of this scheme. The assembly efficiency is high, which improves construction efficiency. The overall bearing capacity of the support structure formed after assembly is relatively high, and it can be reused after disassembly, which can solve the problems of slow construction and environmental pollution of conventional concrete support, as well as low bearing capacity of steel support, and also has the advantages of high bearing capacity and convenient hoisting.

[0030] Specifically, the two prefabricated support blocks 1 located at the end are respectively detachably fixedly connected to the two oppositely arranged underground continuous walls 2 in the foundation pit, and each oppositely arranged underground continuous wall 2 is provided with a waist beam 3 on the side close to the foundation pit. The two connecting flanges 14 far away from each other on the two prefabricated support blocks 1 at both ends are respectively detachably fixedly connected to the two oppositely arranged waist beams 3.

[0031] Specifically, a plurality of anchor bars 31 are disposed in the waist beam 3 , and each anchor bar 31 extends out of the outer surface of the waist beam 3 and is detachably fixedly connected to one of the connecting flanges 14 .

[0032] Specifically, the cross-sectional dimension of each connecting block is larger than the total cross-sectional dimension of the several steel pipes 11 connected thereto, so as to facilitate the connection and fixation between two adjacent prefabricated support blocks 1 and between the prefabricated support block 1 and the waist beam 3, making the connection structure between the two adjacent prefabricated support blocks 1 and the connection structure between the prefabricated support block 1 and the waist beam 3 more stable, thereby improving the bearing capacity.

[0033] Specifically, the connection block is a connection flange 14. The prefabricated support structure filled with concrete in this solution is segmented to produce a number of prefabricated support blocks 1, and the prefabricated support blocks 1 are connected by flanges and bolts, which has high assembly efficiency and improves construction efficiency.

[0034] Specifically, the prefabricated support structure filled with concrete of the present solution further includes a plurality of connecting plates 13, which surround the side of a prefabricated support block 1 at intervals to form a rectangular hoop structure, and one side of each connecting plate 13 is fixedly connected to the side of at least two steel pipes 11. The uppermost connecting plate 13 can be arranged horizontally.

[0035] Specifically, the longitudinal section of each of the steel pipes 11 is square, and a structure of precast concrete filled in a square steel pipe is adopted. Concrete can be filled 12 into the steel pipe 11 in a factory to form a precast structure without on-site pouring, which effectively improves construction efficiency. Among them, each square steel pipe 11 is about 10 mm thick and about 200 mm to 300 mm long. The steel pipe 11 is filled with ultra-high performance concrete of C80 or above grade, so that the steel pipe 11 has a higher bearing capacity.

[0036] Specifically, when four steel pipes 11 are provided in the prefabricated support block 1, at this time, each of the prefabricated support blocks 1 has four steel pipes 11 arranged in an array, and the longitudinal section of each of the prefabricated support blocks 1 is square in the direction perpendicular to the length of the I-shaped structure, and the four steel pipes 11 are parallel to each other and are respectively located at the four corners of the square. The two ends of each of the connecting plates 13 are respectively detachably fixedly connected to the two adjacent steel pipes 11. That is, the two ends of one side of each connecting plate 13 are respectively detachably fixedly connected to the two side surfaces of the two steel pipes 11 located in the same plane by bolts, and the steel pipes 11 with square cross-sections are used to facilitate the connection and fixation between the connecting plate 13 and the steel pipes 11, so that the steel pipes 11 in the same prefabricated support block 1 can remain in a stable state, provide better support, and improve the bearing capacity.

[0037] When four steel pipes 11 are arranged in the prefabricated support block 1 , the cross-sectional dimension of each connecting flange 14 is larger than the total cross-sectional dimension of the four steel pipes 11 connected thereto.

[0038] Specifically, when four steel pipes 11 are arranged in the prefabricated support block 1, at least four connecting plates 13 are spaced around the side of a prefabricated support block 1 to form a rectangular clamp structure, and the two ends of each connecting plate 13 are respectively detachably fixedly connected to two adjacent steel pipes 11. The connecting plate 13 may preferably be a gusset plate, and the four square steel pipes 11 are fixed by the gusset plate to form a combined support, which has stronger rigidity and higher bearing capacity. By setting a plurality of connecting plates 13 and connecting flanges 14, the four steel pipes 11 can be fixed together and combined into a prefabricated support block 1. When in use, a plurality of prefabricated support blocks 1 are connected by bolts and fixed to the waist beam 3 to complete the construction of a prefabricated support structure.

[0039] Specifically, the prefabricated support structure filled with concrete of the present scheme also includes a bracket 15. When four steel pipes 11 are provided in the prefabricated support block 1, the four steel pipes 11 are tightly connected to the bracket 15. The bracket 15 is located in the rectangular clamp structure. The bracket 15 can be located at the center of the rectangular clamp structure, so that the steel pipe 11 in the prefabricated support block 1 can remain stable. A plurality of square steel pipes 11 are interconnected through rectangular clamps, brackets 15 and gussets to form a prefabricated support block 1 with a lattice structure and a high bearing capacity. In the actual production process, the prefabricated support block 1 can be divided into several sections longitudinally. The length of the prefabricated support block 1 can be selected in different lengths such as 3m, 6m, 9m, etc. to meet different foundation pit width requirements. Several prefabricated support blocks 1 are longitudinally connected through a flange structure. The connection between the gusset and the steel pipe 11 and the flange connection between the prefabricated support blocks 1 can be fixed with bolts to facilitate the installation and disassembly of the support. The prefabricated support structure filled with concrete of the present solution is provided with prefabricated support blocks 1 in sections, and each prefabricated support block 1 is designed with steel pipes 11, connecting plates 13, brackets 15 and connecting flanges 14, which can reduce the weight of each prefabricated support member, and further facilitate the production, transportation and hoisting of the support.

[0040] The specific construction method for installing and removing the prefabricated support structure filled with concrete of this scheme includes the following steps:

[0041] S1. Excavation of foundation pit to the bottom elevation of support.

[0042] S2. The prefabricated support structure filled with concrete of this solution is hoisted into the foundation pit in sections and limbs, and the steel pipes 11 are assembled into prefabricated support blocks 1 by connecting the gusset plates, flanges and bolts.

[0043] S3. If the hoisting capacity allows, the prefabricated support structure filled with concrete in this scheme can be assembled as a whole at the side of the foundation pit. After assembly, the overall bearing capacity of the support structure is relatively high, and the entire support structure can be hoisted into the foundation pit, which has the advantage of convenient hoisting.

[0044] S4. The two ends of the prefabricated support structure filled with concrete in this solution are extended into the steel cage of the waist beam 3 through bolt anchor bars 31, and then the concrete of the waist beam 3 is poured.

[0045] S4. When the prefabricated support structure filled with concrete of this solution is dismantled, the concrete waist beam 3 is broken or cut, the bolts of the connecting flange 14 at the end are loosened, and the lifting supports are disassembled one by one, and the supports can be recycled and reused.

[0046] For other contents of the prefabricated support structure filled with concrete described in the present invention, please refer to the prior art and will not be described in detail here.

[0047] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A prefabricated support structure filled with concrete, characterized in that: It comprises a plurality of prefabricated support blocks which are detachably fixedly connected in sequence to form a straight-line structure, each of the prefabricated support blocks comprises two oppositely arranged connection blocks, and a plurality of steel pipes which are parallel to each other and evenly spaced between the two oppositely arranged connection blocks, each of the steel pipes is filled with concrete, and one end of each of the steel pipes in the same prefabricated support block is fixedly connected to one of the connection blocks, and the other end is fixedly connected to another of the connection blocks; The two connecting blocks close to each other between two adjacent prefabricated support blocks are detachably fixedly connected, each connecting block is perpendicular to the length direction of the I-shaped structure, and each steel pipe is parallel to the length direction of the I-shaped structure.

2. The prefabricated support structure filled with concrete according to claim 1, characterized in that: The two prefabricated support blocks located at the ends are respectively detachably fixedly connected to the two oppositely arranged underground continuous walls in the foundation pit. Each underground continuous wall is provided with a waist beam on the side close to the foundation pit. The two connecting blocks located at the two ends are respectively detachably fixedly connected to the corresponding two oppositely arranged waist beams.

3. The prefabricated support structure filled with concrete according to claim 2, characterized in that: A plurality of anchor bars are arranged in the waist beam, and each anchor bar extends out of the outer surface of the waist beam and is detachably fixedly connected to a connecting block.

4. The prefabricated support structure filled with concrete according to claim 1, characterized in that: The cross-sectional dimension of each connecting block is larger than the total cross-sectional dimension of the plurality of steel pipes connected thereto.

5. The prefabricated support structure filled with concrete according to claim 4, characterized in that: The connecting block is a connecting flange.

6. The prefabricated support structure filled with concrete according to claim 1, characterized in that: It also includes a plurality of connecting plates, which are spaced around the side surface of a prefabricated support block, and one side of each connecting plate is fixedly connected to the side surfaces of at least two of the steel pipes.

7. The prefabricated support structure filled with concrete according to claim 6, characterized in that: Each of the prefabricated support blocks has four steel pipes arranged in an array. Each of the prefabricated support blocks has a square cross-section perpendicular to the length direction of the I-shaped structure. The four steel pipes are respectively located at the four corners of the square. Four connecting plates are spaced around the side of a prefabricated support block, and the two ends of each connecting plate are respectively detachably fixedly connected to two adjacent steel pipes.

8. The prefabricated support structure filled with concrete according to claim 1, characterized in that: The longitudinal section of the steel pipe is square.