Rapid emergency treatment method of large-scale tunnel collapse

Abstract

The invention discloses a rapid emergency treatment method of large-scale tunnel collapse. The rapid emergency treatment method comprises the following steps that a section, wherein an initial supportor a second lining is constructed, of a collapse body is temporarily strengthened by adopting I-steel; the collapse surface is closed by anchor-net concrete spraying; a steel perforated pipe is usedfor grouting reinforcement of the collapse body, an advanced small pipe and an advanced big pipe shed are constructed on the arch of the collapse body section, and advance grouting reinforcement is carried out; an arch rescue pilot tunnel part I is excavated, a reinforced collapsed body on one side of the collapsed body is excavated in layers, and radial small pipes are constructed on side walls for grouting reinforcement; a part II, a part III, a part IV, a part V, a part VI and a part VII of the collapse body are excavated in layers and in parts, excavation is carried out in layers and parts, and a steel arch frame is erected; according to the monitoring measured data, temporary vertical supports and temporary transverse supports are removed step by step, and a secondary lining structureis constructed in time; and surface collapse pits are backfilled and a surface drainage system is treated, and the construction of a front tunnel face in a tunnel is restored. The rapid emergency treatment method has the characteristics of safety, rapidity, high efficiency and low cost.

Description

technical field [0001] The invention relates to the technical field of tunnels, in particular to an emergency and rapid treatment method for large tunnel collapses. Background technique [0002] As an underground concealed project, tunnels have high-risk professional characteristics due to their engineering nature, environment, and risk sources. In recent years, many major safety accidents have occurred in the construction of tunnel projects, such as tunnel collapse and roof fall, water gushing and mud gushing, gas explosion, and threats to the safety of adjacent structures, resulting in huge losses of human property and property. The safety situation is very severe and the lessons learned are very profound. . [0003] The reasons for the tunnel collapse include design reasons such as insufficient understanding of engineering and hydrogeological conditions, poor design considerations, construction reasons such as illegal operations and cutting corners, and natural reasons s...

AI Technical Summary

Problems solved by technology

The above landslide treatment methods are affected by many unfavorable factors such as equipment conditions, construction sites, geological conditions, and rescue team capabilities. Not only does the rescue treatment take too long, but also blind construction and treatment are prone to accidents if the unfavorable factors hidden in the boundary are not clear. accidents, etc.

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