膨胀岩的湿化特性及其对堑坡浅层溜坍的影响  

The slaking property and its effect on the topsoil slip of swelling rock cut slope

作　　者：王小军[1] 赵中秀 答治华[1] 

机构地区：[1]铁道部科学研究院西北分院

出　　处：《岩土工程学报》1998年第6期42-46,共5页Chinese Journal of Geotechnical Engineering

摘　　要：通过６种膨胀岩的湿化过程观察和机理研究，从试验和理论两方面探讨了膨胀岩的湿化性，并与膨胀性和裂隙性进行了区别。湿化性对堑坡稳定性，尤其是表层溜坍的影响，主要体现在ｃ，φ值随吸水率的增加而降低上。理论计算的溜坍体厚度与锥贯入试验确定的强湿化层厚度相同，说明湿化性是造成堑坡溜坍的主要原因。The slaking property is studied experimentally and theoretically on the basis of the slaking process observation and slaking mechanism research of six types of swelling rocks. The slaking is different from the swelling and fissuring of expansive rock. The effects of slaking on cut slope stability especially on topsoil slip of swelling rock are mainly reflected by the decrease of shearing strength parameters c and φ with the increase of hygroscopic moisture content. It is reasonable that topsoil slip of swelling rock cut slope is mainly caused by its slaking because the calculated depth of topsoil slip mass is the same as the thickness of strong slaking layer determined by cone penetration test.

关 键 词：膨胀岩 湿化过程 湿化性 堑坡 溜坍 

分 类 号：TU443[建筑科学—岩土工程] P584[建筑科学—土工工程]