Steel pipe horizontal supporting structure and construction method thereof

Abstract

The invention discloses a steel pipe horizontal supporting structure. The steel pipe horizontal supporting structure comprises a steel pipe main support and an H-shaped steel connecting beam for supporting the steel pipe main support, and a web of the H-shaped steel connecting beam extends in the vertical direction; a notch is formed in the H-shaped steel coupling beam and corresponds to the steel pipe main support, the notch upwards penetrates through an upper flange of the H-shaped steel coupling beam, and a distance is formed between the notch and a lower flange of the H-shaped steel coupling beam; and the notch is clamped on the steel pipe main support, an upper shroud ring is detachably installed on the upper flange of the H-shaped steel coupling beam, the upper shroud ring crosses the notch, and the steel pipe main support is tightly pressed in the notch in an abutting mode. The invention further discloses a construction method of the steel pipe horizontal supporting structure. The H-shaped steel coupling beam and the steel pipe main support are connected through the notch, no hole is formed in the steel pipe main support, other parts are not additionally arranged, the integrity of the steel pipe main support is guaranteed, weak points caused by connection are not generated any more, the overall strength of the steel pipe main support is guaranteed, larger prestress can be applied to the steel pipe main support, and therefore, the protection grade of a foundation pit can be improved.

Description

technical field [0001] The invention relates to a steel pipe horizontal support structure and a construction method thereof. Background technique [0002] During the excavation of the foundation pit, in order to ensure the safety of the foundation pit and avoid landslides, it is often necessary to erect horizontal supports in the foundation pit to provide horizontal support for the supporting piles or supporting walls. [0003] At present, the horizontal supports of steel structures are widely used. Steel pipes are often used as main supports. There is no connection between the main supports. Rest on the support beam, and weld the limit piece on the support beam to keep the main support on the support beam. This installation method makes the connection between the supports weak and cannot form a network structure. This structure only It can be used for foundation pits with a narrow width of 5-10 meters, [0004] For a foundation pit with a large width, in order to increase...

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Problems solved by technology

[0003] At present, the horizontal supports of steel structures are widely used. Steel pipes are often used as main supports. There is no connection between the main supports. Rest on the support beam, and weld the limit piece on the support beam to keep the main support on the support beam. This installation method makes the connection between the supports weak and cannot form a network structure. This structure only It can be used for foundation pits with a narrow width of 5-10 meters,

[0004] For a foundation pit with a large width, in order to increase the strength of the support, it is necessary to weld the joint on the main support, then connect the connecting beam to the joint, and weld the joint on the main support, so that the part of the main support is damaged and becomes weak. point, which is not conducive to the safe construction of the foundation pit

[0005] In order to improve the safety during foundation pit excavation and underground structure construction, sometimes prestressing is applied to the main brace to improve the pressure resistance of the main brace and reduce the deformation of the foundation pit. However, in the prior art, bolts are mainly used for connecting beams. Or connected to the main brace by welding, in the process of applying prestress to the main brace, the length of the main brace will change to a certain extent, which will drive the corresponding connecting beam to move. The resulting length changes will not be exactly the same, and there will always be some differences, resulting in the process of applying prestress to the main brace, which will also have an effect on the coupling beam at the same time. Due to the different effects of each main brace on the coupling beam, the coupling beam A certain degree of bending deformation will affect the overall stability of the horizontal support

In order to avoid the reduction of the stability of the horizontal support due to the deformation of the coupling beam, in some foundation pits, the horizontal support only uses the main brace, and the coupling beam is cancelled. Although the cancellation of the coupling beam can eliminate the above problems, it increases the erection of the main support Difficulty, and a certain number of columns need to be erected for each main support. Too many columns increase the difficulty of foundation pit excavation and underground structure construction, and cannot improve construction efficiency

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