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

A construction method and topsoil technology, which is applied in the direction of sinking, earthwork drilling, wellbore lining, etc., can solve problems such as insufficient strength of the frozen wall, difficulty in digging the wellbore, and crushing of the outer well wall, so as to reduce the labor intensity of workers , shorten the construction period, reduce the effect of rental costs

Inactive Publication Date: 2010-04-14
中煤第一建设有限公司第四十九工程处
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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 o

Method used

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Example Embodiment

[0011] The present invention has the following 8 key technologies for the rapid construction technology of deep and thick topsoil layer large diameter vertical shaft freezing method sinking shaft:

[0012] 1. Borehole measurement and deviation correction technology

[0013] During the construction, the drilling hole positions shall be opened strictly according to the designed hole positions. For borehole inclination measurement, the inclination is measured once every 20m of drilling according to the specifications and design requirements, and the actual borehole deflection azimuth map is drawn every 40m to guide the construction. The JDT-3 gyroscope is used to measure the inclination, and the YL-127 hydraulic screw drill is used to correct the inclination, and the drilling, measurement and correction are combined to ensure the quality of the drilling construction.

[0014] 2. Freezing capacity guarantee technology

[0015] The freezing station adopts two-stage compression refrigerati...

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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 ...

Claims

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Application Information

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IPC IPC(8): E21D1/12E21D5/11
Inventor 赵京虎范聚朝徐树岐杨星林靳丽娟赵静
Owner 中煤第一建设有限公司第四十九工程处
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