Measuring system for internal displacement of rock and earth mass

Abstract

The invention relates to a measuring system for internal displacement of a rock and earth mass. The measuring system comprises a measuring unit, wherein the measuring unit sends a signal to a data acquisition unit connected with terminal equipment, and comprises an anchoring head; the anchoring head is connected with a grating scale through an alloy wire; and the grating scale is connected with the data acquisition unit. The anchoring head buried in a rock and soil medium is small in size and light in weight, is closely jointed with the rock and earth medium, and generates same displacement with a surrounding medium in the same direction; the alloy wire is small in deformation per se, and has a very small coefficient of friction resistance with the medium and a low disturbance to the nature of the rock and earth mass, and the obtained displacement result is closer to the actual value; the minimal measuring unit of the grating scale can reach micrometer level; the data acquisition unit and terminal equipment can automatically acquire, transmit and record the required data; and the system can realize the low-disturbance and high-precision measuring of the internal displacement of the rock and earth mass, and the automatic acquisition, transmission and record of data.

Description

technical field [0001] The invention relates to a system for measuring internal displacement of rock and soil bodies. Background technique [0002] Rock and soil model test is a very important means in the application and research of geotechnical engineering. It has the advantages of accuracy, intuition and good conformity with the actual situation, and has been widely used in recent years. An important part of the rock and soil model test is the data collection inside the rock and soil. However, it is very difficult to collect a lot of information inside the rock and soil mass, especially the accurate collection of displacement field change data inside the rock and soil mass, and there has been a lack of simple and accurate means. [0003] The Chinese patent application number 201010607907.6 discloses a geotechnical drilling multi-point displacement meter that can be used for on-site measurement of the axial displacement of surrounding rock or foundation in shafts, tunnels...

AI Technical Summary

Problems solved by technology

The displacement measurement system is a mechanical principle measurement, the accuracy is not high, and it cannot be measured automatically

[0008] Existing technologies similar to the present invention are mostly aimed at geotechnical engineering construction or operation site measurement, and are larger in size and high in cost, and are not suitable for rock and soil model tests that are reduced by a certain similarity ratio.

Existing measurement systems that can be used for rock and soil model tests are still lacking in disturbance, accuracy, operability and automation of rock and soil

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