Long and short pipe reinforcing structure and method for reinforcing water-rich sandy stratum tunnel

Abstract

The invention discloses a long and short pipe reinforcing structure and method for reinforcing a water-rich sandy stratum tunnel, and relates to the technical field of tunnel stratum reinforcement. According to the technical scheme, the long and short pipe reinforcing structure is characterized by comprising a plurality of anchor rods, a plurality of steel arch frames and a plurality of drill holes formed in the 180-degree range of a tunnel arch part, wherein the plurality of steel arch frames are erected in the excavated tunnel at intervals, and one steel arch frame is tightly attached to a tunnel face; long pipe sheds are arranged in the drill holes, and the ends, extending out of the drill holes, of the long pipe sheds are supported on the steel arch frames; the long pipe sheds are filled with cement mortar; and the long and short pipe reinforcing structure further comprises a plurality of advanced small guide pipes arranged in the tunnel arch part and a side wall. According to the method, the characteristics of long advanced reinforcing distance and large rigidity of the long pipe sheds and the effects of grouting and reinforcing surrounding rock and isolating underground water of the advanced small guide pipes are utilized, the long pipe sheds take the tunnel face, the steel arch frames and the front surrounding rock as fulcrums, the beam arch effect can be achieved, the effects of reinforcing the surrounding rock and controlling deformation are achieved, the tunnel face is sealed through grouting, and the safety of excavation construction of the tunnel face can be guaranteed.

Description

technical field [0001] The invention relates to the technical field of tunnel formation reinforcement, more specifically, it relates to a long and short pipe reinforcement structure and method for reinforcement of water-rich sandy formation tunnels. Background technique [0002] At present, with the rapid development of the economy and society, the pace of construction of the national transportation network has been accelerated. The scale of construction of railways and highways has been further expanded, and tunnel projects that cross complex terrain are often the key to upgrading the technical level of road networks and realizing modern transportation, and are an indispensable and important part of the national railway network and the transportation systems of major cities. Obviously, the complex geological problems faced in the process of tunnel construction will become increasingly prominent, and the water-rich and sandy stratum is one of the geological conditions most p...

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Problems solved by technology

[0003] Under the joint action of groundwater, construction disturbance and other factors, water-rich sandy strata have problems such as soil seepage damage, structural interaction and surrounding rock deterioration, which can easily lead to major mud inrush, large structural deformation damage and surface subsidence. Engineering disasters and environmental problems have brought great difficulties and risks to engineering construction

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