Underground engineering vault crown settlement measuring device based on level method

Abstract

The invention discloses an underground engineering vault crown settlement measuring device based on a level method. The device comprises an embedded rod with threads at two ends, an expansion fastener connected to the embedded end of the embedded rod in a threaded mode, a hanging part connected to the other end of the embedded rod, and a measuring scale hung on the hanging part. The hanging part comprises a connector, a triangular pull ring and a protecting sleeve buckled outside the triangular pull ring. One end of the connector is connected with the non-embedded end of the embedded rod in a threaded mode, and the other end of the connector is fixedly connected with the bottom side of the triangular pull ring. The protecting sleeve comprises a front catch and a rear catch which are matched with the triangular pull ring in shape, and a horn which fixes the two catches and is matched with the vertex angle of the triangular pull ring in shape. Measuring point embedment is convenient, the fastening effect is good, the pollution and damage caused by primary supporting, working face digging and other construction work to a measuring point can be effectively avoided, and the accuracy and reliability of data obtained through testing of a level can be ensured.

Description

technical field [0001] The invention relates to an underground engineering monitoring and measuring device, in particular to an underground engineering vault settlement measuring device based on a level method. Background technique [0002] Underground projects such as tunnels, tunnels, and mountain caverns are difficult to construct due to their concealment, geological complexity, construction diversity, and environmental variability. Seriously affected the construction progress of the project, and also greatly threatened the safety of construction personnel. Monitoring and measurement refers to the regular observation and measurement of the deformation and stability of surrounding rock, ground surface and support structure, as well as the dynamics of the surrounding environment during the construction of underground projects. Through monitoring and measurement, it is possible to understand and grasp the stability of surrounding rock and the reliability of the support stru...

AI Technical Summary

Problems solved by technology

[0005] 1. After the reinforcement goes deep into the surrounding rock layer, it is easy to cause bad points due to the loosening of the surrounding rock, which directly affects the test results and continuity;

[0006] 2. The initial support, excavation of the working face and other constructions will cause certain pollution and damage to the triangular hook. Once pollution or damage occurs, it needs to be replaced, and the replacement is very troublesome. It cannot guarantee the long-term normal operation of the measuring ruler on the measuring point. , affecting the continuity and accuracy of measurement data;

[0007] 3. The triangular hook is welded on the threaded steel bar and cannot be replaced after damage, which makes the measurement point unable to continue testing;

[0008] 4. Once the initial support construction is completed, it is extremely difficult to implement the addition of monitoring and measuring points. Therefore, it is impossible to temporarily adjust the measurement position according to the needs of safe construction, and the flexibility is very low.

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