Water diversion branch tunnel construction method capable of performing water feature recognition

Abstract

The invention provides a water diversion branch tunnel construction method capable of performing water feature recognition. The construction method comprises a grouting method and an underground water feature recognition method, wherein the grouting method comprises a slurry preparation method and a slurry control method; the slurry preparation method comprises the following steps of preparing slurry according to the mass mixing ratio of water to cement of 2: 1; after the preparation, performing stirring by a stirring machine; periodically and intermittently stirring the slurry, wherein the stirring time in each time cannot be smaller than 2min; and pumping the stirred slurry to the downstream position by a mortar pump through a conveying pipe. The underground water feature recognition method comprises the following steps of arranging a sampling detection module on the tunnel wall of a branch tunnel; introducing underground water into the branch tunnel in a pilot test; and stopping the water introduction after the water level of the introduced underground water reaches the preset water level line, wherein the position of the preset water level line is higher than the position of the sampling detection module.

Description

technical field [0001] The invention relates to the field of construction of a branch tunnel of a long inclined shaft with a large dip angle, in particular to a construction method of a water diversion branch tunnel capable of identifying water features. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of engineering construction technology, there are more and more water diversion tunnel construction projects in complex and ecologically sensitive areas. The construction of ecologically sensitive areas has extremely high requirements for environmental protection. The average distance between the Kunming 7-bill Kuncheng Tunnel and the Dianchi Lake of the central Yunnan water diversion project is only about 6km. During the project construction period, the protection and restoration standards for the surrounding environment are very high. The impact of tunnel engineering construction on the environment is manifested ...

AI Technical Summary

Problems solved by technology

[0007] 2) The combined valve core is used to adjust the flow rate, but this adjustment often requires two driving modes, which greatly increases the cost and volume

[0008] 3. The rotation drive structure of the prior art often has a protrusion on the active part, but the passive part with a groove matching the protrusion will bear the risk of a decrease in structural strength

[0009] 4. The valves in the prior art often have sensing modules. However, for construction valves, due to the need for frequent movement and disassembly, the sensing modules need to be disassembled, transported and reinstalled separately, which consumes a lot of manpower and material resources.

[0010] 5. In the existing technology, in order to realize multi-function adjustment such as multi-stage flow adjustment, series valves are used. The series valve is actually two valves, and the cost takes up a lot of space.

[0011] 6. The gate structure in the prior art is often set at the top, because the gate has a long stroke, so it is not suitable to be set at the bottom, and the adjustment and support structures are difficult to set up, and the structure is often complicated

Images