A construction method for the pilot hole of the vertical shaft raising method over a large area of ​​quicksand layer

Abstract

The invention discloses a construction method for a large-area quicksand layer with a pilot hole of a vertical shaft raising method, which comprises the following steps: a. construction preparation; b. installation of a raising drilling machine; c. drilling construction of a pilot hole. During the construction process of the pilot hole drilling of the present invention, the materials used are conventional and cheap, and at the same time, no additional purchased equipment is involved. The use of professional equipment is less and the overall operation method is relatively simple and flexible, which reduces the construction cost and investment in equipment and equipment, greatly The project cost is reduced, and while good economic benefits are obtained, construction safety can be effectively ensured. The simple operation reduces the impact on the surrounding people, and the materials used without environmentally harmful substances ensure the protection of the surrounding environment and groundwater. The process has high efficiency, strong operability, safety and environmental protection, excellent quality, easy promotion, and saves The investment has added a new option for the disposal method of the pilot hole flow sand layer, promoted the development of the technology of raising the back well, and has huge potential social benefits.

Description

technical field [0001] The invention relates to the technical field of shaft raising method construction, in particular to a construction method in which the pilot hole of the shaft raising method is over a large area of ​​quicksand layer. Background technique [0002] In recent years, the number of tunnel construction in my country has continued to be high, and the length of tunnel construction has surpassed the number of construction. "Long, large, multiple, and deep" has become the future development trend of tunnel construction. Among them, in order to solve the ventilation problem in extra-long highway tunnels, ventilation shafts are generally installed in the middle of the tunnel. The traditional tunnel shaft construction mainly adopts the full-section excavation method from top to bottom, supplemented by drilling and blasting methods to increase the diameter of the shaft and improve the efficiency. Low, pollute the environment, and personal safety cannot be guaranteed...

AI Technical Summary

Problems solved by technology

However, during the construction of the shaft pilot hole through the flowing sand layer with water, there will be phenomena such as hole wall collapse and buried drilling, which will lead to slow construction and high safety risks.

Images