Method for calculating compression modulus of gravel-containing clay

Abstract

The invention discloses a method for calculating the compression modulus of gravel-containing clay. The method comprises the steps: S1, a drill hole is formed in a clay sample of the gravel-containingclay, and the drill hole is located in the position, above the reference plane, with the first predetermined height; S2, a standard penetrometer is driven into the drill hole and driven into the clayby the first depth h1; S3, the standard penetrometer is driven from the first depth h1 to the second depth h2, the hammer number of the standard penetrometer driven by the predetermined depth value each time is recorded, and the hammer numbers of driving to the second depth h2 are accumulated to be recorded as the standard penetration experimental hammer number N; and S4, according to the measured standard penetration experimental hammer number N, the compression modulus, meeting the relation of Es=a*N+b, of the gravel-containing clay is obtained, wherein a and b are set positive parameter values correspondingly. Through the method, the problems of high cost and poor popularization of tests of the compression modulus of the gravel-containing clay are solved, the survey efficiency is improved, and the survey cost is lowered.

Description

technical field [0001] The invention relates to the field of geotechnical engineering, in particular to a method for calculating the compressive modulus of gravel-containing clay. Background technique [0002] In engineering geological survey, standard penetration test, dynamic exploration test and other in-situ testing methods are generally used to preliminarily judge the compactness of rock and soil, and then combined with sampling to conduct laboratory experiments to accurately determine the compression modulus of rock and soil , bearing capacity and other physical and mechanical parameters. However, in the survey work, due to the non-uniformity of the gravel content of the gravel-containing clay that is often encountered, the on-site sampling cannot be performed, or the indoor experiment cannot be carried out after sampling, or the experimental results are highly discrete. In order to solve the above-mentioned experimental difficulties, indoor experiments can be carried...

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Problems solved by technology

[0003] The embodiment of the present invention is to provide a method for calculating the compressive modulus of gravel-containing clay, so as to solve the problems of high experimental cost and poor popularization of the compressive modulus of gravel-containing clay

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