Novel fish-belly sill steel support system and construction method thereof

Abstract

The invention discloses a novel fish-belly sill steel support system and a construction method thereof.The novel fish-belly sill steel support system comprises a steel support, a triangular force transmission frame, a first cross beam, a steel strand, a fish-belly sill supporting rod and an H-shaped steel inclined strut, the two ends of the steel support are installed on the triangular force transmission frame, the triangular force transmission frame is installed on the first cross beam, and the first cross beam is installed on a concrete top beam; the concrete top beam is provided with vertically-arranged SMW construction method pile profile steel, one end of each fish-belly sill supporting rod is fixed to the SMW construction method pile profile steel, the H-shaped steel inclined struts are connected with the SMW construction method pile profile steel and the fish-belly sill supporting rods, and the steel strands are connected with the two adjacent first cross beams and the fish-belly sill supporting rods. And the construction cost and the construction risk can be further reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of foundation pit support, and more particularly to a novel fish belly beam steel support system and a construction method thereof. Background Art

[0002] The fishbelly beam is a special structural form of beam, named for its cross-sectional shape, which resembles a fish belly (high in the middle and gradually lower at the ends, forming a curved or broken line). It is a type of variable-section beam. By optimizing material distribution, it achieves lightweight and high strength, and is widely used in long-span buildings, bridges, and temporary support projects.

[0003] Traditional fishbelt beams are often combined with steel supports to form a secondary support system for foundation pit projects, preventing slope instability and collapse. However, a pair of traditional fishbelt beams is typically equipped with two steel supports, which complicates construction and results in an excessive number of steel supports. Furthermore, the traditional fishbelt beams have too few support rods, which often cause out-of-plane warping and subsequent instability under the heavy load of the steel strands, posing a serious safety hazard. Summary of the Invention

[0004] In response to the problems existing in the prior art, the purpose of the present invention is to provide a new fish belly beam steel support system and its construction method, which can reduce the number of steel supports, and the fish belly beam support rods have higher out-of-plane stability, which can further reduce construction costs and construction risks.

[0005] The present invention adopts the following technical solutions:

[0006] A novel fish beam steel support system includes a steel support, a triangular force transmission frame, a cross beam, a steel strand, a fish beam support rod and an H-shaped steel diagonal brace. Both ends of the steel support are installed on the triangular force transmission frame, the triangular force transmission frame is installed on the cross beam, the cross beam is installed on the concrete crown beam, the concrete crown beam is provided with a vertically arranged SMW construction method pile steel, one end of the fish beam support rod is fixed on the SMW construction method pile steel, the H-shaped steel diagonal brace connects the SMW construction method pile steel and the fish beam support rod, and the steel strand connects two adjacent cross beams and the fish beam support rod.

[0007] Furthermore, the fish beam support rods are arranged horizontally, and the fish beam support rods are welded to the flange plates of the SMW construction method pile steel.

[0008] Furthermore, it also includes a triangular key. The other end of the triangular force transmission frame is equipped with a second crossbeam, and multiple triangular keys are installed between the second crossbeam and the first crossbeam.

[0009] Furthermore, the same steel strand is installed on three fish beam support rods of different lengths, wherein the length of the fish beam support rod in the middle is greater than the length of the fish beam support rods on both sides.

[0010] Furthermore, the H-shaped steel diagonal brace is connected to the middle position of the fish beam support rod.

[0011] Furthermore, the crossbeam 1 is fixed at the bracket position of the SMW method pile steel.

[0012] Furthermore, a concrete crown beam is cast in the soil of the foundation pit wall, and several corner supports are installed between two mutually perpendicular concrete crown beams. Fish belly beam support rods, H-shaped steel diagonal braces and steel strands are installed between the corner supports and adjacent cross beams.

[0013] The present invention also discloses a novel fish belly beam steel support system construction method, comprising the following steps:

[0014] Weld the fish beam support rod to the SMW pile steel flange plate, and weld or bolt the H-shaped steel diagonal brace and the steel, and then fix the crossbeam to the SMW pile steel corbel position;

[0015] Use high-strength bolts to install the triangular key and triangular force transmission frame at the end of the fish belly beam;

[0016] Install the steel support and connect both ends of the steel support to the triangular force transmission frame with high-strength bolts;

[0017] Install the steel strands and apply preload in stages until the fish beam struts and steel supports reach the design load value.

[0018] Beneficial effects

[0019] The present invention can reduce the number of traditional steel supports by half, making construction more convenient, safer and more reliable;

[0020] The fish belly beam support rod of the present invention is more stable outside the plane, is less likely to cause the support rod to warp and deform, and is safer and more reliable;

[0021] The present invention can provide a larger construction space and working surface for the construction site, and the construction efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a novel fish belly beam steel support system according to an embodiment of the present invention;

[0023] Figure 2 for Figure 1 Middle AA section view;

[0024] Figure 3 It is a schematic diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0026] As shown in the figure, the present invention discloses a novel fish beam steel support system, comprising a steel support 1, a triangular force transmission frame 2, a cross beam 3, steel strands 4, fish beam braces 5, and H-shaped steel diagonal braces 6. The two ends of the steel support 1 are mounted on the triangular force transmission frame 2, which is mounted on the cross beam 3, which is mounted on the concrete crown beam 7. The concrete crown beam 7 is provided with vertically mounted SMW pile steel 8. One end of the fish beam brace 5 is fixed to the SMW pile steel 8. The H-shaped steel diagonal brace 6 connects the SMW pile steel 8 and the fish beam brace 5. The steel strands 4 connect two adjacent cross beams 3 and the fish beam brace 5. By changing the support system structure, the present invention significantly reduces the number of steel supports 1, requiring only half the number of existing ones, reducing the time and process required for construction, and making construction more convenient, safe, and reliable.

[0027] In one embodiment of the present invention, the fish beam support rods 5 are horizontally arranged and welded to the flange plates of the SMW pile steel 8 .

[0028] In one embodiment of the present invention, a triangular key 9 is further included. A second crossbeam 10 is installed at the other end of the triangular force transmission frame 2 , and multiple triangular keys 9 are installed between the second crossbeam 10 and the first crossbeam 3 .

[0029] In one embodiment of the present invention, the same steel strand 4 is mounted on three fish beam support rods of different lengths, with the middle fish beam support rod being longer than the two side fish beam support rods. This allows the steel strand 4 to be supported and tightened.

[0030] In one embodiment of the present invention, an H-shaped steel brace 6 is connected to the middle of the fish beam support 5. Specifically, when the length of the fish beam support 5 is L, the H-shaped steel brace 6 is installed at a length L / 2 of the fish beam support 5. This structural design of the fish beam support 5 of the present invention makes the fish beam support 5 more stable and less prone to warping and deformation.

[0031] In one embodiment of the present invention, the crossbeam 1 3 is fixed at the bracket position of the SMW pile steel 8 .

[0032] In one embodiment of the present invention, a concrete crown beam 7 is cast in the foundation pit wall. Several corner supports 11 are installed between two mutually perpendicular concrete crown beams 7. Fishbeam braces 5, H-shaped steel diagonal braces 6, and steel strands 4 are installed between the corner supports 11 and the adjacent crossbeam 3. Here, the fishbeam braces 5, H-shaped steel diagonal braces 6, and steel strands 4 are installed as a set.

[0033] The present invention also discloses a novel fish belly beam steel support system construction method, comprising the following steps:

[0034] Weld the fish beam support rod 5 to the flange plate of the SMW construction method pile steel 8, and weld or bolt the H-shaped steel diagonal brace 6 and the steel 8, and then fix the crossbeam 3 to the bracket position of the SMW construction method pile steel 8;

[0035] Use high-strength bolts to install the triangular key 9 and the triangular force transmission frame 2;

[0036] Install the steel support so that both ends of the steel support 1 are connected to the triangular force transmission frame 2 with high-strength bolts;

[0037] Install the steel strands and apply pre-tightening force in stages until the fish beam struts 5 and steel supports 1 reach the design load value.

[0038] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A new type of fish belly beam steel support system, characterized by: It includes steel support, triangular force transmission frame, beam one, steel strand, fish beam support rod and H-shaped steel diagonal brace. Both ends of the steel support are installed on the triangular force transmission frame, the triangular force transmission frame is installed on beam one, beam one is installed on the concrete crown beam, the concrete crown beam is provided with vertically set SMW construction method pile steel, one end of the fish beam support rod is fixed on the SMW construction method pile steel, the H-shaped steel diagonal brace connects the SMW construction method pile steel and the fish beam support rod, and the steel strand connects two adjacent beams one and the fish beam support rod.

2. The novel fish belly beam steel support system according to claim 1 is characterized by: The fish beam support rods are set horizontally and welded to the flange plates of the SMW pile steel.

3. The novel fish belly beam steel support system according to claim 1 is characterized by: It also includes a triangular key. The other end of the triangular force transmission frame is equipped with a second crossbeam, and a plurality of triangular keys are installed between the second crossbeam and the first crossbeam.

4. The novel fish belly beam steel support system according to claim 3 is characterized by: The same steel strand is installed on three fish beam support rods of different lengths, wherein the length of the fish beam support rod in the middle is greater than the length of the fish beam support rods on both sides.

5. The novel fish belly beam steel support system according to claim 1 is characterized by: The H-shaped steel diagonal brace is connected to the middle position of the fish beam support rod.

6. The novel fish belly beam steel support system according to claim 1 is characterized by: The crossbeam is fixed at the bracket position of the SMW pile steel.

7. The novel fish belly beam steel support system according to claim 1 is characterized by: A concrete crown beam is cast in the soil of the foundation pit wall. Several corner supports are installed between the two mutually perpendicular concrete crown beams. Fish belly beam support rods, H-shaped steel diagonal braces and steel strands are installed between the corner supports and the adjacent cross beams.

8. A new type of fish belly beam steel support system construction method, characterized by: The following steps are involved: Weld the fish beam support rod to the SMW pile steel flange plate, and weld or bolt the H-shaped steel diagonal brace and the steel, and then fix the crossbeam to the SMW pile steel corbel position; Use high-strength bolts to install the triangular key and triangular force transmission frame at the end of the fish belly beam; Install the steel support and connect both ends of the steel support to the triangular force transmission frame with high-strength bolts; Install the steel strands and apply preload in stages until the fish beam struts and steel supports reach the design load value.

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