Full-sectional grouting, rectangular horizontal freezing and pipe roof combined reinforcing structure and method

Abstract

The invention provides a full-sectional grouting, rectangular horizontal freezing and pipe roof combined reinforcing structure and a full-sectional grouting, rectangular horizontal freezing and pipe roof combined reinforcing method. The structure comprises a rectangular freezing wall, a freezing hole 1, a temperature measuring hole 2, a pressure relief hole 3, a pipe roof 4, a full-sectional grouting region 5, an underground passage initial lining structure 6 and an underground passage second lining structure 7. The structure and the method provided by the invention have the beneficial effects that the structure and the method are suitable for water-rich sandy soil layer or soft soil layer rectangular underground passage underground excavation reinforcing engineering with open excavation construction incapability during the construction of important under-passing buildings in an urban center; the intensity and the watertightness of a reinforcing body are ensured through combining a rectangular horizontal freezing wall in the reinforcement; the stability of an excavation tunnel face is ensured through the grouting reinforcement, meanwhile, the frost heave and thawing subsidence phenomenon caused by freezing is inhibited; the protection effect on sensitive environment is ensured; the influence of upper part thin overburden digging unloading on the important buildings is controlled by the pipe roof; the existing freezing hole, grouting and pipe roof construction machinery does not need to be subjected to technical improvement; and the construction is convenient. Compared with other chemical reinforcing methods, the method provided by the invention has the advantages that the safety is high; the environment is protected; and the benefits are obvious.

Description

technical field [0001] The invention relates to an underground channel construction reinforcement structure and method for crossing sensitive buildings (structures), sandy soil or soft soil layer rich in water, full-section grouting, rectangular horizontal freezing and upper pipe shed joint reinforcement. The utility model belongs to the technical field of reinforcement of underground tunnels dug in shallow depths. Background technique [0002] During shallow excavation of underground passages, in order to ensure the smooth excavation process and the safety of buildings (structures) within the affected area, it is usually necessary to reinforce the excavated soil. Its function is to prevent the inflow of groundwater and soil outside the underground passage and maintain the stability of the excavated section, so that the reinforcement itself has a certain strength and rigidity. Its function is to retain soil and water, ensure the stability of the excavation surface and contr...

AI Technical Summary

Problems solved by technology

[0005] The construction of underground passages, especially in the city center, encounters more and more complex surrounding environments and stratum environments. Due to site and stratum constraints, various chemical reinforcement methods cannot be used or are not suitable, and a single rectangular horizontal freezing method is used. Reinforcement Due to the large excavation section, it is difficult to ensure the stability of the working face, and it is difficult to meet the complex environmental protection requirements due to the frost heaving and thawing characteristics of the excavation pressure relief and freezing method.

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