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

Abstract

The invention discloses digital drilling equipment and method for measuring rock mass strength on an engineering site. The digital drilling device is composed of a digital drilling device, an adjusting rack and a movable platform, wherein the digital drilling device comprises a drill bit, a precision digital sensor, a motor, a protection device and the like, the drilling process can be abstractedinto data information, the digital drilling device is connected with the adjusting rack through a support arm and a fixing ring so as to adjust the relative position of the drill bit and a rock mass to be tested, the adjusting rack is arranged on the movable platform through a stand column, and drilling testing of testing points at different positions can be achieved. The invention further relatesto the method for measuring the rock mass strength on the engineering site. The method comprises the following steps of obtaining the rock mass strength through mathematical operation by detecting the characteristic parameters of the drilling tool response information in the rock drilling process. According to the digital drilling equipment and method, quantitative, real-time and in-situ testingof the engineering rock mass strength is achieved, a large number of artificial subjective factors and the sampling and sample preparation process are overcome, the evaluation result is rapider and more accurate, and the equipment is high in informatization and automation degree and can be widely applied and popularized 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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