Adaptive connecting joint for steel supports and steel enclosing purlins in foundation pit and construction method thereof

Abstract

The invention relates to an adaptive connecting joint for steel supports and steel enclosing purlins in a foundation pit and a construction method thereof. The foundation pit is provided with an enclosure system and a horizontal supporting system. The enclosure system comprises the steel enclosing purlins arranged on the inner wall of the foundation pit. The horizontal supporting system comprises the steel supports supported in the foundation pit. The ends of the steel supports abut against and are fixed to the steel enclosing purlins. The adaptive connecting joint comprises supporting parts arranged on the connecting portions of the steel supports and the steel enclosing purlins in a supporting manner in the oblique direction, thus, a splayed support structure formed by the two supporting parts is formed on the connecting portions of the steel supports and the steel enclosing purlins, and by means of the splayed support structure, supporting force of the steel supports is transferred to the steel enclosing purlins in the oblique direction so as to reduce bending moment borne by the steel enclosing purlins. By means of the splayed support structure, the supporting force of the steel supports is transferred to the steel enclosing purlins in the oblique direction, the span of the steel enclosing purlin is reduced, the bending moment borne by the steel enclosing purlins is reduced under the effect of soil pressure, and deformation of the steel enclosing purlins is effectively controlled.

Description

technical field [0001] The invention relates to the field of foundation pit support in building construction, in particular to an adaptive connection node of a steel support and a steel purlin in a foundation pit and a construction method thereof. Background technique [0002] In the foundation pit engineering, the stability of the foundation pit construction process is ensured through the setting of the enclosure system and the horizontal support system. The enclosure system includes the enclosure piles in the surrounding soil of the foundation pit and the enclosure purlins on the enclosure piles, which play a role in strengthening the soil to ensure the stability of the foundation pit. The enclosure purlins are set on the inner side of the enclosure piles The side wall of the foundation pit is also arranged on the top of the retaining pile, the horizontal support system is supported on the purlin, and the horizontal support system is horizontally supported inside the found...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of the prior art, provide an adaptive connection node of the steel support and the steel purlin in the foundation pit and its construction method, and solve the constraint of the steel purlin formed by the end of the steel support in the prior art The large distance between the support and restraint supports makes the mid-span bending moment and deformation of the steel purlin under the action of earth pressure very large, which makes the designed steel purlin section size larger

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