Monitoring instrument and method for deformation of tunnel surrounding rocks

A technology of surrounding rock deformation and monitoring instrument, applied in the direction of mechanical solid deformation measurement, etc., can solve the problems of monitoring data not playing its due role, high automation degree, inaccurate monitoring results, etc., and achieve simple and easy testing device. Operation, high precision, time and effort saving effect

Inactive Publication Date: 2014-02-19
CHINA GASOLINEEUM ENG
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Problems solved by technology

Especially for the displacement monitoring of hard rock, the short-term displacement is very small. If the accuracy of the instrument is not enough, the monitoring result will be inaccurate
[0007] 2. High requ

Method used

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  • Monitoring instrument and method for deformation of tunnel surrounding rocks

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[0034] A tunnel surrounding rock deformation monitor, such as figure 1 As shown, it includes a steel bar and several layers of steel pipes sleeved outside the steel bar. The length of the innermost steel pipe is shorter than that of the steel bar, the length of the steel pipe becomes shorter from the inside to the outside, and the diameter of the steel pipe gradually decreases from the inside to the outside. layer becomes longer. A steel ring 1 is welded at 10cm from the top of the steel bar, and between the steel ring and the top of the steel bar is the blasting charge area 2, which is used to bind and bond the charge bag; the top of the innermost steel pipe and the top 10cm from the top are welded with a steel ring. , is also used for tying and bonding the medicine bag, the exposed part of the steel bar outside the innermost steel pipe is covered with a PVC plastic pipe 3, and the PVC plastic pipe withstands the top of the innermost steel pipe. The same as the innermost lay...

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Abstract

The invention discloses a monitoring instrument and method for deformation of tunnel surrounding rocks. Displacement transmission rods of the monitoring instrument include a steel bar and multiple layers of steel pipes, wherein the steel pipes are sleeved on the steel bar, and the lengths of the steel pipes decrease layer by layer; steel rings are respectively welded at a position 10cm from the top of the steel bar, the tops of the steel pipes, and positions 10cm from the tops of the steel bars; a PVC (Polyvinyl Chloride) plastic pipe is sleeved on the exposed portion, which is not embedded into the adjacent steel pipe, of each steel pipe, and the PVC plastic pipe abuts against the top of the adjacent steel pipe; and the tail end of the PVC plastic pipe of the outermost steel pipe is equipped with an external sleeve, a probe is welded at the top of the external sleeve, measuring holes are formed in the probe, the number of the measuring holes equals that of the displacement transmission rods, and the size of measuring holes is consistent with that of a measuring rod of an electronic indicating gauge. According to the invention, the displacement transmission rods make point-to-point contact with the rocks, thereby ensuring firmness of the different contact points, preventing the displacement transmission rods from being disengaged from the rocks, and reducing the influence of the monitoring instrument on the rock displacement result to the largest extent. The monitoring instrument and method of the invention have good environmental adaptability, and operation is simple.

Description

technical field [0001] The invention relates to a monitoring instrument and a monitoring method for surrounding rock deformation of a tunnel. Background technique [0002] With the rapid development of my country's economy, more and more tunnels are excavated, and the deformation of the surrounding rock of the tunnel is one of the most concerned issues in the tunnel engineering construction. [0003] After the tunnel is excavated, due to the change of its stress state, the stress balance state before excavation is broken, and the surrounding rock will reach a new balance through deformation and stress adjustment. This adjustment is a dynamic process, so the deformation of the surrounding rock is also a dynamic process. The deformation trend of the surrounding rock should be grasped through the dynamic information of the surrounding rock deformation, that is, the displacement-time curve obtained from the measurement, and the total displacement at each time , Displacement vel...

Claims

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Application Information

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IPC IPC(8): G01B5/30
Inventor 辜利江亢会明郭涵宇康胜卿春和吴有亮于长杰邓艳潘如升柴国良曹昱刘玉国梁国卿李欣张晓光王彬全赵普向阳符枝华何德伟李志为宋文平邹勇袁朝银王海兰
Owner CHINA GASOLINEEUM ENG
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