Rod type coaxial multi-point displacement measuring device

Abstract

The invention relates to a monitoring device for measuring surface displacement and internal deformation of slope rock and surrounding rock, in particular to a rod type multi-point displacement measuring device adopting a coaxial structure. The measuring device adopts the structure that the displacement transfer pipes with diameters gradually increased are sequentially and coaxially sleeved from inside to outside, an anchor head of the innermost displacement transfer pipe is a solid anchor head, and the anchor heads of other displacement transfer pipes are hollow anchor heads with through holes; the hollow anchor heads are connected with the adjacent displacement transfer steel pipes on the inner side, which penetrate the through holes; each externally sleeved plastic pipe is cut off and is subjected to diameter changing at the through anchor head on the outer side of the plastic pipe so as to allow the anchoring segment to be exposed out; and the distances between the anchor heads and an installation base are sequentially diminished according to the sequence of the displacement transfer pipes where the anchor heads are positioned from inside to outside. The measuring device provided by the invention is most suitable for the fields with higher requirement in measuring accuracy, and can also be used for other engineering occasions with requirements similar to displacement or deformation monitoring.

Description

technical field [0001] The invention relates to a monitoring device for measuring surface displacement and internal deformation of slope rock mass and cavern surrounding rock, in particular to a rod-type multi-point displacement measuring device with a coaxial structure. Background technique [0002] Using multi-point displacement meters to monitor the deformation of slope rock mass and surrounding rock in caverns is one of the most important methods in current engineering practice. Generally, the anchor heads and transmission rod components of multi-point displacement meters are buried in the form of drilling. , measure the hole displacement and internal rock mass deformation along the axis of the borehole at the hole hole. [0003] The rod-type multi-point displacement meter currently used is a multi-point combination form of a multi-transfer rod assembly (a transfer rod assembly includes: an anchor head, a transfer steel rod, and a plastic sleeve), that is, it is arrange...

AI Technical Summary

Problems solved by technology

Due to the docking of the displacement sensor and the transmission rod at the end of the orifice, under the influence of the fixed frame of the displacement sensor, manual measurement cannot be used for manual measurement, and the exposed part of the orifice of the displacement sensor installation base is relatively long

Moreover, there is no manual corresponding measurement means and data. When the displacement sensor is damaged, it is generally impossible to replace and repair it.

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