Support frame, support structure and construction method of support structure

Abstract

The invention relates to the technical field of tunnel construction, in particular relates to a support frame, a support structure and a construction method of the support structure, and provides a support frame which is formed by sequentially connecting a plurality of support segments in cycle, wherein hole grooves are formed in two ends of each support segment; adjacent support segments are connected through a first sleeve; the first sleeve is a hollow circumferential sleeve which is matched with the support segments in size; mounting holes are formed in two ends of the front wall surface and the rear wall surface of the first sleeve corresponding to the hole grooves; a second sleeve is a cross-shaped sleeve which comprises the circumferential sleeve similar to the first sleeve and two longitudinal sleeves which are symmetrically arranged at the centers of the front side wall and the rear side wall of the circumferential sleeve; energy-dissipation presplitting slots are formed in the middle parts of two ends of the left wall surface and the right wall surface of the circumferential sleeve. The support structure formed by combining the first sleeve and the second sleeve is reasonable in design and convenient to construct, and can effectively adapt to large deformation of a surrounding rock; the clearance-intrusion risk of the local large deformation of a tunnel is reduced; the overall stability of a primary lining support structure is improved; and the subsequent treatment cost of the engineering is reduced.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a support frame, a support structure and a construction method for the support structure, and in particular to a structure that can improve the overall stability of the initial support of the tunnel and is suitable for the large deformation section of the surrounding rock The supporting frame, the supporting structure and the construction method of the supporting structure. Background technique [0002] During the excavation and construction of tunnel engineering, if the geological conditions of the surrounding rock are poor, such as the surrounding rock is weak or broken, in order to ensure the stability of the surrounding rock and construction safety, the tunnel usually adopts the construction method of step-by-step excavation, and the main sequence is as follows: Excavation of the upper steps, initial spraying of concrete, laying of steel mesh, laying of anchor rod...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that the current I-beams are connected by rectangular steel plates with holes welded at their ends, resulting in insufficient splicing strength of the steel arch frame and poor overall stability. This will lead to the primary support encroachment or steel arch frame longitudinal deflection deformation along the tunnel, the initial bearing capacity of the tunnel will decrease and collapse will occur, which will affect the construction process and the safety of construction personnel

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