Pipe gallery foundation pit supporting system based on fabricated construction

Abstract

The utility model discloses a pipe gallery foundation pit supporting system based on assembly type construction. The problem that an existing steel support serves as a main supporting component and is poor in stability is solved. The foundation pit supporting system comprises steel sheet piles, purline beams, brackets and a steel supporting frame, and the steel sheet piles and the purline beams define a foundation pit channel for pipe gallery construction on the two sides of a foundation pit; the square light steel frame is composed of a square frame on the outer side, a circular frame on the inner side and a supporting steel pipe connecting the square frame and the circular frame in the middle, the steel supporting frame is installed on the top of the foundation pit channel, and the two sides of the steel supporting frame are mechanically fixed to the brackets and the purline beams through fasteners. According to the utility model, a steel support of a traditional beam structure is changed into a steel support of a frame structure, so that the safety of support is improved. Meanwhile, the steel support of the frame structure is formed by welding light steel pipes, and the self weight is lighter than that of a traditional large I-shaped steel support.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of foundation pit support construction. BACKGROUND

[0002] In the existing pipe gallery construction, steel sheet piles are used for support, and the specific method is to drive the steel sheet piles into the edge position of the to-be-excavated foundation pit in a vertical state, then use steel supports for support, excavate after the support is completed, and then backfill the earthwork after the pipe gallery construction is completed, and cooperatively remove the steel supports and steel sheet piles to complete the construction process of the pipe gallery foundation pit.

[0003] In the above process, the steel support is generally a section steel, which is fixed at both ends on a purlin beam that constrains the steel sheet pile. The problem is that the steel support, as a section steel, has a long length, for example, a 4-meter-long steel support, which has poor stability and is prone to instability. At the same time, the steel support needs to maintain a vertical relationship with the purlin beams on both sides, so the two ends of the steel support need to be mechanically connected using special corbels, which requires high construction precision. UTILITY MODEL CONTENTS

[0004] To solve the problems of the prior art, the utility model provides a pipe gallery foundation pit support system based on fabricated construction, which solves the problem of poor stability of the existing steel support as a main supporting component, and also solves the problem of low construction efficiency.

[0005] The utility model solves the technical problems by adopting the following technical scheme:

[0006] A pipe gallery foundation pit support system based on fabricated construction, the foundation pit support system comprises a steel sheet pile, a purlin beam, a corbel and a steel support frame, the steel sheet pile and the purlin beam are enclosed on both sides of the foundation pit to form a foundation pit passage for pipe gallery construction, characterized in that: the steel support frame is a square light steel frame composed of an outer square frame, an inner circular frame and a support steel pipe connecting the square frame and the circular frame in the middle, and the steel support frame is installed at the top of the foundation pit passage and mechanically fixed on both sides with the corbel and the purlin beam through fasteners.

[0007] Further, the support steel pipe comprises an inclined support and a short support, wherein the inclined support is located at the corner of the square frame, one short support is welded and fixed at each of the eight positions around the circular frame, and the outer end of the short support is welded and connected with the inclined support and the square frame.

[0008] Further, the angle between the inclined support and the side frame in the square frame is 45 degrees.

[0009] Further, the steel support frame is a light steel frame formed by welding steel pipes.

[0010] Further, the steel support frame is a square frame with the same width as the width of the foundation pit.

[0011] Further, the plurality of steel support frames are erected continuously.

[0012] Further, the plurality of steel support frames are erected at a certain distance.

[0013] Further, the purlin beam and the corbel are steel structures.

[0014] The beneficial effects of the present application are:

[0015] The present application changes the traditional beam structure steel support into a frame structure steel support, which has better stability and improves the safety of the support. At the same time, the frame structure steel support is made of light steel pipe welding, which is lighter than the traditional large I-beam support, that is, while maintaining the support effect, the self-weight of the steel support is reduced, which has positive significance for hoisting construction.

[0016] The frame structure steel support in the present application is factory-made and modularly designed, which improves the standardization of the support operation and improves the construction efficiency.

[0017] The frame structure steel support in the present application adopts a light steel welding structure, which can be recycled and has a secondary recycling value. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a perspective view of the steel support frame.

[0019] Figure 2 It is a perspective view of the present application.

[0020] Figure 3 It is a plan view. Figure 2

[0021] Figure 4 It is a vertical sectional view of the present application.

[0022] In the drawings:

[0023] 00 foundation pit passage,

[0024] 10 steel sheet pile,

[0025] 20 purlin beam,

[0026] 30 corbel,

[0027] 40 steel support frame, 41 square frame, 42 circular frame, 43 support steel pipe, 431 inclined support, 432 short support. DETAILED DESCRIPTION

[0028] Reference​Figures 1 to 4 The embodiment introduces in detail a pipe gallery foundation pit supporting system based on fabricated construction. The foundation pit supporting system comprises a steel sheet pile 10, a purlin beam 20, a corbel 30 and a steel support frame 40. The steel sheet pile and the purlin beam form a pipe gallery construction foundation pit passage on both sides of the foundation pit, and the purlin beam is located at the top of the foundation pit, and the corbel is fixed on the purlin beam.

[0029] The purlin beam 20 and the corbel 30 can be a steel structure or a reinforced concrete structure, wherein the corbel provides a force point for the steel support frame.

[0030] The steel support frame 40 is a welded integral part formed by welding steel pipes. The steel support frame 40 has an outer square frame 41, an inner circular frame 42 and a support steel pipe 43 connecting the square frame and the circular frame. The support steel pipe 43 includes inclined supports 431 and short supports 432 according to different positions. The inclined support is located at the corner of the square frame and forms an angle of 45 degrees or close to 45 degrees with the side frame of the square frame. Eight short supports are welded and fixed around the circular frame in eight directions, which are arranged outward along the radial direction of the circular frame, and the outer ends of the short supports are welded and connected with the inclined supports and the square frame, respectively. Figure 1 The welding makes the circular frame located at the central position of the square frame, and the outer diameter of the circular frame 42 is as close as possible to the square frame.

[0031] During installation, the steel support frame 40 is hoisted to the top of the foundation pit and gradually lowered, so that the steel support frame gradually falls on the corbel 30, and is mechanically fixed between the corbel and the square frame by using fasteners, fastening hoops and the like. The steel support frame bears the pressure from the purlin beams 20 on both sides. Due to the better stability of the steel support frame and the existence of internal support, the support effect of the steel support frame is obviously improved.

[0032] In the embodiment, the steel support frame 40 is made of 60*60mm steel pipes which are cut, assembled and welded, and then subjected to paint corrosion prevention treatment, realizing the support of light steel structure.

[0033] The steel support frame can be made into a square frame with the same width as the foundation pit, realizing standardization and modularization, facilitating manufacturing, transportation and hoisting, and realizing rapid fabricated construction.

[0034] The modular steel support frame 40 replaces the original I-beam or large round steel structure, realizing the goal of replacing heavy steel support with light steel structure, and the steel support frame of light steel structure has better support performance. That is, under the same support performance, the steel support frame has a lighter self-weight.

[0035] In the installation process, the steel support frames 40 can be erected continuously or at intervals, for example, an interval space is arranged between two adjacent steel support frames, and the size of the interval space is preferably one steel support frame. The interval space can be large or small. When the interval space is small, personnel and materials can be hoisted from the circular frame 42, that is, a construction passage is formed.

[0036] The above-described embodiments are merely preferred embodiments of the present application, and are not intended to limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements of the present application made by those skilled in the art shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A pipe gallery foundation pit support system based on fabricated construction, the foundation pit support system comprising steel sheet piles, purlin beams, corbels and steel support frames, the steel sheet piles and purlin beams enclosing a foundation pit passage for pipe gallery construction on both sides of the foundation pit, characterized in that: The steel support frame is a square light steel frame composed of an outer square frame, an inner circular frame and support steel pipes connecting the square frame and the circular frame, and is installed on the top of the foundation pit passage and mechanically fixed to the corbels and purlin beams on both sides by fasteners.

2. The pipe gallery foundation pit support system based on fabricated construction according to claim 1, characterized in that, The support steel pipes include diagonal supports and short supports, wherein the diagonal supports are located at the corners of the square frame, one short support is welded and fixed at each of the eight positions around the circular frame, and the outer ends of the short supports are welded to the diagonal supports and the square frame respectively.

3. The pipe gallery foundation pit support system based on fabricated construction according to claim 2, characterized in that, The diagonal supports and the side frames in the square frame form an included angle of 45 degrees.

4. The pipe gallery foundation pit support system based on fabricated construction according to claim 3, characterized in that, The steel support frame is a light steel frame formed by welding steel pipes.

5. The pipe gallery foundation pit support system based on fabricated construction according to claim 4, characterized in that, The steel support frame is a square frame with the same width as the foundation pit.

6. The pipe gallery foundation pit support system based on fabricated construction according to claim 1, characterized in that, Multiple steel support frames are continuously erected.

7. The pipe gallery foundation pit support system based on fabricated construction according to claim 1, characterized in that, Multiple steel support frames are erected at a certain distance.

8. The pipe gallery foundation pit support system based on fabricated construction according to claim 1, characterized in that, The purlin beams and corbels are steel structures.

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