Shallow tunneling method for pipe-proof-supporting structure combined system

Abstract

The invention discloses a shallow tunneling method for a pipe-proof-supporting structure combined system. The method comprises the steps of A, arranging two vertical working wells in areas without sensitive buildings at the two ends of an underground structure; B, ejecting size and diameter combination steel pipes into the periphery of an underground main body structure through the vertical working wells to form a tube screen; C, reinforcing a soil body between the steel pipes through a grouting or freezing method to form water tightness underground space; D, under the protection of the combined tube screen, conducting shallow tunneling construction on the underground main body structure, and enabling the tube screen and a supporting structure to form a longitudinal annular combination stress system with large rigidity; E, after the combination stress system achieves a certain strength, disassembling an inner contemporary support, and constructing the underground main body structure. The shallow tunneling method for the pipe-proof-supporting structure combined system has the advantages that the pipe screen is combined with the supporting structure, the combined stress system with the large rigidity is formed, settlement is strictly controlled, loss of underground water is effectively controlled, construction and operation safety is ensured, and the shallow tunneling method for the pipe-proof-supporting structure combined system is particularly suitable for the situation that an ultra-shallow berried oversized section saturated tunnel penetrates through the sensitive buildings underground.

Description

technical field [0001] The invention belongs to the field of underground structure construction, and in particular relates to a pipe curtain-supporting structure combined system shallow buried excavation method (PSSE), which is suitable for shallow buried large-section underground structures passing through sensitive buildings in saturated water-rich soft soil layers project. Background technique [0002] With the acceleration of China's urbanization process, more and more large-scale underground structures are built under urban roads or important buildings, such as urban underground tunnels, subway stations, underground parking lots, etc. At present, the construction of urban underground tunnels, urban subway stations, underground parking lots and other projects under existing roads or buildings mainly includes open-cut method, shield method and shallow burial method. The open cut method not only destroys the environment, but also excavates the original road surface, which...

AI Technical Summary

Problems solved by technology

When the geological conditions are poor, the buried depth is shallow, and there are sensitive buildings on the upper part, if the general shallow buried underground excavation method is used for construction, the safety risk is relatively large, and the ground subsidence is difficult to control. Once a construction accident occurs, the social impact will be significant.

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