Long distance observation apparatus for internal displacement of surrounding rocks

Abstract

The invention belongs to the engineering measuring technology field and relates to a long distance observation apparatus for internal displacement of surrounding rocks. The apparatus comprises a support with a rotating shaft and a plurality of circular-ring-shaped displacement rotating discs which are provided with flange around the inner circle circumference. Besides, the displacement rotating discs, sleeved on the rotating shaft, can rotate around the rotating shaft. A shadow shield, fixed on the rotating shaft, pushes tight and covers the displacement rotating discs. The external diametersof the displacement rotating discs decrease in order towards the shadow shield side. The displacement rotating discs have annular coding at the circumference facing the shadow shield surface. The shadow shield has a window and the annular coding on all the displacement rotating discs can be observed from the window. A measuring point anchor head is connected with steel wire which bypasses the flange of the displacement rotating disks and through movable pulleys, the displacement rotating disks are connected in a pair. Besides, a counter weight is hanged on one movable pulley to maintain the steel wire in a tight state. A telescope set to observe the annular coding is also included. An image sensor is behind the telescope set and is connected with a computer. The apparatus can convenientlycarry out long distance observation in underground engineering construction.

Description

technical field [0001] The invention relates to a surrounding rock displacement observation device, which belongs to the technical field of engineering measurement. Background technique [0002] In recent years, my country's major infrastructure construction has developed vigorously, and a large number of tunnel projects (tunnels, underground caverns, underground workshops, and roadway networks) have been built. The new Austrian method, which is commonly used in engineering construction, advocates the use of bolts, hanging nets, shotcrete and other means in the initial support to connect the surrounding rock and the shotcrete support to form a common force-bearing body, and to maximize the use of the surrounding rock itself. capacity, save support material, and obtain better support effect. In order to meet the requirements of its dynamic construction, it is necessary to track and monitor the deformation of the surrounding rock during the construction process, adjust the ca...

AI Technical Summary

Problems solved by technology

This type of instrument has some shortcomings in practical application: 1) It is necessary to manually approach the measurement hole for reading. For large-section underground space projects, it is difficult for personnel to climb up and measure, so it is not easy to implement, and the error of human reading is relatively large; 2) Personnel measurement requires assistance such as scaffolding, ladders or trolleys, which hinders the passage of vehicles and personnel during tunnel construction and affects normal construction

Therefore, in the construction of underground projects such as tunnels and mine roadways, there are many situations that should be used or not, and should be closely monitored, but they are mere formalities due to measurement difficulties.

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