Method for establishing sandy mudstone uniaxial compressive strength curve

Abstract

The invention discloses a method for establishing a sandy mudstone uniaxial compressive strength curve. The method comprises the following steps: I, selecting sandy mudstone in an area to be tested, and manufacturing a cylindrical sandy mudstone test sample; II, testing a damage limit loading value as uniaxial compressive strength of the sandy mudstone, of the sandy mudstone test sample in the step I; III, fitting the value of the uniaxial compressive strength tested in the step II by using a least square method, so as to obtain the relationship between water contents and the uniaxial compressive strength; fitting the value of the tested uniaxial compressive strength by using the least square method, so as to obtain the relationship between dry densities and the uniaxial compressive strength; IV, fitting the relationship between ratios (exp (rhod / w )) of different dry densities to water contents and the uniaxial compressive strength of the sandy mudstone by using the least square method, and according to a curve diagram of the relationship between the ratios (exp (rhod / w )) of the different dry densities to the water contents and the uniaxial compressive strength of the sandy mudstone, establishing mathematic expressions of the uniaxial compressive strength of the sandy mudstone based on the water contents and the dry densities.

Description

technical field [0001] The invention belongs to the technical field of sandy mudstone, and in particular relates to a method for establishing a uniaxial compressive strength curve of sandy mudstone. Background technique [0002] Mudstone is widely distributed in my country. Due to the influence of physical parameters, structural characteristics and mineral composition, its compressive strength varies greatly. Many domestic researchers have conducted more research on this. Affected by the natural and geographical environment of the area, the physical and mechanical characteristics of mudstone in different regions are quite different. Tertiary sandy mudstone is widely distributed in Ningxia, my country. A large number of engineering accidents in the area have shown that sandy mudstone meets water. Afterwards, the dry density and water content will change, but it is difficult to give a test method for the relationship between the compressive strength and the above-mentioned dry ...

AI Technical Summary

Problems solved by technology

Affected by the natural and geographical environment of the area, the physical and mechanical characteristics of mudstone in different regions are quite different. Tertiary sandy mudstone is widely distributed in Ningxia, my country. A large number of engineering accidents in the area have shown that sandy mudstone meets water. Afterwards, the dry density and water content will change, but it is difficult to give a test method for the relationship between the compressive strength and the above dry density and water content

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