Digital drilling equipment and method for measuring rock mass strength on site

Abstract

The invention discloses a digital drilling equipment and method for measuring rock mass strength on the engineering site, which consists of three parts: a digital drilling device, an adjusting frame and a mobile platform. The digital drilling device includes a drill bit, precision digital sensors, motors and protective devices, etc., which can abstract the drilling process into data information; The relative position of the rock mass is measured, and the adjustment frame is set on the mobile platform through the column, which can realize the drilling test of the measuring points at different positions; The characteristic parameters of the drilling tool response information in the drilling process, and the rock mass strength are obtained through mathematical operations; the invention realizes the quantitative, real-time and in-situ testing of the engineering rock mass strength, overcomes a large number of human subjective factors and sampling and sample preparation processes, and evaluates the results It is more rapid and accurate, and the equipment has a high degree of informationization and automation, and can be widely used and promoted in engineering.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering investigation, and specifically relates to a digital drilling device and method for measuring rock mass strength on the engineering site. Background technique [0002] For engineering construction in rock mass, the strength of rock mass often plays a decisive role in construction efficiency, engineering stability and support requirements, so the strength of rock mass must be quantitatively determined in construction and design. [0003] At present, the project does not directly test the strength of the rock mass, but mainly obtains the strength of the rock mass through experiments, and converts the strength of the rock mass through strength reduction. There are mainly two existing methods to obtain rock strength. One is to obtain rock cores by drilling at the construction site and transport them to the rock laboratory for uniaxial or triaxial compressive strength tests to obtain rock streng...

AI Technical Summary

Problems solved by technology

There are mainly two existing methods to obtain rock strength. One is to obtain rock cores by drilling at the construction site and transport them to the rock laboratory for uniaxial or triaxial compressive strength tests to obtain rock strength. The operation process is cumbersome and expensive, and it is not an in-situ test. The properties of rock samples change during sampling, sample preparation and transportation, and there are often gaps between the results obtained in the laboratory and the real in-situ data.

The other is the indirect measurement of rock strength by point load test. This method has a short test time and does not require high processing of test samples, but the test accuracy is not high, and it is not an in-situ test.

Moreover, the above two methods are difficult to measure the strength of the weak interlayer of rock mass.

If the strength of the rock mass of the project cannot be given and the construction is carried out rashly, it will bring low construction efficiency and hidden dangers to the quality of the project, and even serious instability accidents will occur, resulting in major economic losses.

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