Press-in type pipe shed supporting structure used for weak stratum tunnel

Abstract

The invention discloses a press-in type pipe shed supporting structure used for a weak stratum tunnel. The press-in type pipe shed supporting structure comprises at least one pipe shed section. Each pipe shed section comprises a plurality of flat steel pipe sets inserted into a soil layer, wherein the flat steel pipe sets are adjacently arranged to form the arched pipe shed section. Each flat steel pipe set is formed by connecting a plurality of flat steel pipe sections end to end in an inserting mode, and the adjacent flat steel pipe sets are connected through buckle assemblies. Through the flat structure of the flat steel pipe sections, the stress area of the steel pipe sections and upper loads is enlarged, and therefore the strength of the supporting structure is improved. Internal reinforcing ribs inside the flat steel pipe sections can improve the vertical pressure bearing capacity of the flat steel pipe sections, and therefore the compressive strength of a pipe shed is improved. The flat steel pipe sets are connected through the buckle assemblies which can be used for connecting the adjacent flat steel pipe sets and also play a role of water stopping so as to prevent underground water from seeping into the pipe shed.

Description

technical field [0001] The invention belongs to the field of tunnel construction, in particular to a press-in type pipe shed support structure for tunnels in soft ground. Background technique [0002] The traditional pipe roof grouting support is to drive a group of circular steel pipes into the ground along the drilled holes outside the excavation outline, and combine them with the steel arch to form a powerful scaffold pre-support reinforcement system. The support comes from The load on the upper part of the pipe shed is pressurized and grouted into the formation through the grouting holes arranged in the plum blossom shape of the steel pipe to strengthen the weak and broken formation and improve the self-stabilization ability of the formation. At present, the problems existing in the grouting support of the pipe shed are mainly the inaccurate positioning of the elevation angle and spacing of the pipe shed during construction, the subsidence control effect is not ideal, an...

AI Technical Summary

Problems solved by technology

At present, the problems existing in the grouting support of the pipe shed are mainly the inaccurate positioning of the elevation angle and spacing of the pipe shed during construction, the effect of controlling the settlement is not ideal, and the effect of preventing seepage and water can not be well achieved

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