Rapid construction process for sinking vertical shaft pit shaft with large diameter on deep surface soil layer by utilizing freezing method

Abstract

The invention discloses a rapid construction process for sinking a vertical shaft pit shaft with large diameter on a deep surface soil layer by utilizing a freezing method. Aiming to overcome the defect of the prior art, the invention provides the following key technologies: a borehole deviational survey deviation correction technology, a freezing refrigerating capacity guaranteeing technology, a centrally control technology of a shaft sinking winch, a multifunctional hanging scaffold fixing technology, an automatically and centrally stirring technology of high-strength concrete, application of an improved rock rake in a frozen loose bed, application of a small excavator in the frozen loose bed and a thick expanded clay bed supporting technology. The process meets the policy requirement of low power consumption in China, lowers the working intensity of workers, simplifies the operation procedures and shortens the period of construction.

Description

Technical field [0001] The invention relates to a rapid construction of shaft freezing method for vertical shaft sinking, and is particularly suitable for the rapid construction of shaft freezing method for shaft sinking of large diameter deep and thick surface soil. Background technique [0002] At present, in the deep topsoil layer, excessive displacement due to insufficient strength of the frozen wall has occurred many times, resulting in the fracture of the frozen pipe and the collapse of the outer shaft wall: for example, the outer wall of the main shaft of Shandong Liangbaosi Mine collapsed on a large scale, resulting in the final When filling the well, more than 20 freezing pipes were broken in the main and auxiliary shafts of Shandong Huayuan Mine, and the outer wall was crushed. The shaft was frozen for too long, and the shaft was "frozen", which brought difficulties to the construction of the shaft. . In view of the construction characteristics of the freezing section ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is: in order to overcome the deficiencies of the prior art, solve the problem that the displacement of the frozen wall is too large due to insufficient strength of the frozen wall, resulting in the fracture of the frozen pipe and the crushing of the outer well wall, the wellbore is "frozen", and the wellbore is excavated. To solve difficult problems, provide a rapid construction method for large-diameter vertical shaft shaft freezing method in deep topsoil