泥质页岩-粉质黏土土石混合填料原位水平推剪试验研究  

Research on horizontal push-shear in-situ test of pelitic shale-silty clay mixture

作　　者：张晓健[1] 龚辉[1] 艾传井[1] 尚思良[1] 徐炎兵[1] 

机构地区：[1]中国电力工程顾问集团中南电力设计院有限公司,湖北武汉430071

出　　处：《水文地质工程地质》2017年第3期79-85,共7页Hydrogeology & Engineering Geology

基　　金：中南电力设计院大型科研课题项目资助(40-1A-KY201510-G01);国家自然科学基金项目资助(41630643);国家自然科学基金面上项目资助(41272305)

摘　　要：土石混合料是由土和岩块(碎石)组成的复合体。混合料中土的种类不同,岩块的种类及含量不同,剪切破坏特征亦不同。由于对其剪切破坏机理研究还不够深入,在工程中难以确定这类填料的强度参数。为进一步探明土石混合填料的剪切破坏特征,对泥质页岩-粉质黏土混合填料进行了12个原位大型水平推剪试验,根据现场试验结果,将这类土石混合填料的水平推力-位移曲线划分为5个阶段,并对各个剪切破坏面进行三维还原,为土石混合体内部破坏机理的进一步研究奠定了基础。Rock-soil aggregate is a special kind of engineering geological body. The type and content of soil or rock can influence the shear failure characteristics of the mixture. Since the mechanism of shear failure is not clear enough, it is difficult to determine the strength parameters of such fillers. Twelve in-situ push shear tests were carried out on the pelitic shale-silty clay mixture in order to further ascertain the rock-soil mixture shear failure characteristics, and some significant results were obtained. Through the in-situ tests, the complete load-displacement curves can be divided into five stages. Meanwhile, the 3D grid graph of the shear failure surface was obtained to establish the foundation of further research on the internal failure mechanism of rock- soil mixture.

关 键 词：土石混合料 水平推剪试验 天然状态 暴雨状态 剪切破坏面 

分 类 号：TU413.1[建筑科学—岩土工程]