工程地质学报2025，Vol.33Issue(3)：803-811,9.DOI:10.13544/j.cnki.jeg.2022-0593
含水率对土石混合体-岩石界面剪切力学特性影响规律的研究
STUDY ON THE EFFECT OF WATER CONTENT ON SHEAR MECHANI-CAL PROPERTIES OF SOIL-ROCK MIXTURE INTERFACE
摘要
Abstract
To investigate the effect of water content on the shear mechanical properties of the soil-rock mixture in-terface,large-scale direct shear tests were conducted on the soil-rock mixture interface under varying conditions of water content and roughness.The test results reveal that the specimen exhibits plastic strain failure at medium and low water contents.At high moisture contents,strain hardening failure occurs.Roughness primarily influences the displacement required for shear stress-displacement curves to reach plastic strain.The shear strength of the contact surface is affected by water content,roughness,and normal stress.Shear strength increases with higher normal stress and roughness,but decreases with increased water content.The order of significance is normal stress＞rough-ness＞water content.Cohesion increases and decreases with the increase of roughness and water content.The internal friction angle experiences a slight increase and decrease with the rise of roughness and water content.关键词
土石混合体/土-石界面/含水率/因素敏感性/剪切特性Key words
Soil-rock mixture/Soil-rock interface/Moisture content/Factor sensitivity/Shear properties分类
天文与地球科学引用本文复制引用
黄达,郑毅,罗世林,杨健康,高溢康..含水率对土石混合体-岩石界面剪切力学特性影响规律的研究[J].工程地质学报,2025,33(3):803-811,9.基金项目
湖南省自然科学青年基金项目(资助号:2022JJ40521),国家自然科学基金项目(资助号:41972297,42407279),河北省自然科学基金面上项目(资助号:D2021202002).This research is supported by Hunan Natural Science Youth Fund(Grant No.2022JJ40521),General program of National Natural Science Founda-tion of China(Grant Nos.41972297,42407279)and General program of Hebei Natural Science Foundation(Grant No.D2021202002). （资助号:2022JJ40521）
