Excavation positioning device and method for complex structure cavern group in geomechanics model test

Abstract

The invention discloses a geomechnical model test complex structure cavern group excavating positioning device and method. The geomechnical model test complex structure cavern group excavating positioning method comprises the main steps that (1) an excavation initial point is positioned, specifically, through transverse and vertical positioning groove holes in excavation positioning plates, the position of a tool bit of an excavation device is accurately and finely adjusted, and positioning of the excavation initial point is completed; (2), the excavation orientation is positioned, specifically, through combination of a total station and software, the excavation orientation is determined, by adjusting foot screws on the excavation positioning plates, the orientation of the exaction deviceis accurately adjusted, and positioning of the excavation orientation is completed; and (3), deviation rectifying monitoring is conducted in the excavation process, specifically, after excavation positioning is completed, the position and angle of the total station are kept to be unchanged, andthe deviation of the excavation orientation is monitored in real time through a laser indicator lamp of the total station, and rectified in time. The geomechnical model test complex structure cavern group excavating positioning device and method have the following advantages that (1) the excavation positioning accuracy is high; (2) operation is easy and convenient, and disturbance to a model frame is small; and (3) the excavation orientation can be monitored in real time and rectified in time in theexcavation process.

Description

technical field [0001] The invention relates to an excavation positioning method for a model test, in particular to an excavation positioning device and method for underground engineering geomechanics model tests of complex structure caverns. Background technique [0002] With the continuous development of social productivity, the number and scale of underground engineering construction are increasing in energy, transportation, water conservancy, mining, national defense and other fields, and the development and utilization of underground space has increasingly reflected huge economic and social benefits. . At the same time, in order to meet the specific functional requirements, many underground projects are gradually going deep, and the cavern structure is gradually developing towards the multi-cavity intersecting complex structure cavern group with vertical shafts and flat caverns. Different from the traditional single or simple parallel traffic tunnels, there are obvious...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the inner wall of the cavity is easy to form joints, and the physical and mechanical parameters between the prefabricated blocks are discontinuous, which greatly affects the test results.

In this method, some caverns are manually excavated, and the error is relatively large. Some caverns are formed by drafting, which cannot simulate the actual excavation and unloading process, and it is even more difficult to carry out excavation and positioning of caverns with complex structures.

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