Computing method for representative elementary volume of jointed rock

Abstract

The invention provides a computing method for the representative elementary volume of a jointed rock, which belongs to field of geotechnical engineering calculation parameters. According to the invention, a multi-scale jointed rock sample with an indoor test scale, an on-site in-situ test scale, an engineering scale and the like capable of fully reflecting joint spatial distribution characteristics and rock and joint mechanical characteristics is constructed based on indoor rock and joint mechanical tests and on-site joint geological survey, and virtual uniaxial compression loading is carried out on the sample to obtain a stress-strain curve; a relational graph of uniaxial compressive strength of a variety of jointed rocks and loading-direction sample dimension is drafted, and a relation curve is fitted; in the fitted relation curve, if a ratio of reduction amount of the uniaxial compressive strength to uniaxial compressive strength of an indoor rock sample is less than 0.2% when the loading-direction sample dimension of the jointed rocks is increased by 1 m each time, it is believed that uniaxial compressive strength of the jointed rocks does not change with increase of dimension, and the representative elementary volume of the jointed rocks is obtained. The method provided by the invention has the advantages of simple principles, convenient operation, low cost and a good usage effect and facilitates determination of the representative elementary volume of the jointed rock.

Description

technical field [0001] The invention relates to a value-acquiring method for the volume of a joint rock mass representation unit, which belongs to the field of geotechnical engineering calculation parameter research and is applicable to the research of various rock engineering mechanical parameters such as slopes, tunnels, and dam foundations. technical background [0002] Rock mass, as a geological body, has experienced the action of geological tectonic movements in different periods, undergone deformation and damage in the long geological age, formed a certain rock composition and structure, and existed in a certain geological environment. As an important structural plane in rock mass, the development of joints often poses safety hazards to various rock engineering. Engineering accidents caused by improper evaluation of rock quality often occur. Therefore, in-depth research on the mechanical properties of jointed rock mass is the basis for ensuring the rational design, sa...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of using the theoretical analysis method with many assumptions and complex theoretical systems to study the volume of joint rock mass representation units, and to provide a method with simple principle, convenient operation, low cost and good use effect, which is convenient for determining joints. rock mass representation unit volume

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