Detachable prestress supporting frame system

Abstract

The invention discloses a detachable prestress supporting frame system and aims to provide a supporting frame system which is good in stability of a supporting structure of a foundation pit, can reduce supporting density to a supporting beam and provides larger working space for foundation pit mining operations on the premise of not influencing strength of the supporting structure of the foundation pit. The detachable prestress supporting frame system comprises a group of construction method piles and an enclosure purlin beam. The group of construction method piles are arranged on the edge of the foundation pit. The enclosure purlin beam is arranged on the inner side of the construction method piles. A plurality of triangular supporting members are arranged on the inner side of the enclosure purlin. Angle counter-supporting beams are arranged at the concave corner of the foundation pit. Each angle counter-supporting beam is arranged between two triangular supporting members on two adjacent sides of the concave corner. One end of each angle counter-supporting beam abuts against the side surface of one of the triangular supporting members. A prestress reserved member is arranged between the other end of each angle counter-supporting beam and another triangular supporting member. The prestress reserved member comprises two supporting parts which can be unfolded mutually, one of the two supporting parts abuts against the side surface of the triangular supporting member, and the other supporting part abuts against the end portion of the angle counter-supporting beam.

Description

technical field [0001] The invention relates to a support system, in particular to a detachable prestressed support frame system applied in foundation pits. Background technique [0002] In order to ensure the safety of the underground structure and the surrounding environment of the foundation pit, it is necessary to adopt protective measures such as support and reinforcement on the side wall of the foundation pit and its surroundings. The current foundation pit support system usually includes a group of engineering piles arranged around the edge of the foundation pit, surrounding beams located inside the engineering piles and counter-supporting beams arranged between the surrounding beams. The existing counter-supported beams usually use straight-supported beams to directly support the surrounding beams on opposite sides, so as to strengthen the strength of the support of the foundation pit and control the deformation of the structure. [0003] For example, Chinese Patent...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the fact that a large number of support beams in the existing foundation pit support are distributed in the middle and edge of the foundation pit, and the support density of the support beams is high, which affects the excavation operation of the foundation pit; and the stability of the support structure of the foundation pit is not good. To solve the problem, provide a foundation pit support structure with good stability, and can reduce the support density of the support beam without affecting the strength of the foundation pit support structure, and provide a larger working space for the excavation of the foundation pit. Prestressed Support System

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