INSTABILITY OF DECOMPOSED GRANITE CUT SLOPES CAUSED BY EXPANSIVE CLAY LAYERS
作者单位：Graduate School of Science and Engineering Ehime University Japan Faculty of EngineeringEhime University Japan
会议名称：《2002年中国西北部重大工程地质问题论坛》
会议日期：2002年
学科分类：08[工学] 081601[工学-大地测量学与测量工程] 0816[工学-测绘科学与技术]
关 键 词：Cut slopes Expansive clay mineral Masado Slope failure
摘 要：The ever increasing need of smoother flow of traffic in Japan is being met by constructing newer and wider roads as well as developing best possible road *** such roads need to pass across the hills and mountains that make nearly 75%of the country’s *** a tunnel is not feasible or possible,the option goes to cutting slopes to acquire the necessary space for the *** natural slopes,however,results in a risk of slope *** instability of a cut slope might be caused by various factors but one prominent reason is stress release,which disturbs the balance of stresses along the potential line of *** paper introduces some cases of cut slope failures in decomposed granite zones under the influence of clay veins,and discusses the causes of failures from mineralogical and geotechnical points of *** a result of the laboratory tests,it was revealed that the clay veins consist of expansive clay minerals such as smectite,which up on stress release absorb more water and weaken the clay *** process then results in failure of the cut slopes along the veins.