杭兰公路滴水崖段上挖下填边坡优化设计  

Optimal design of upper digging and bottom filling slope in Dishuiya section of Hanglan road

作　　者：陈法基 贺常伟 罗世毅 

机构地区：[1]广西交通科学研究院,广西南宁530007 [2]中冶长天国际工程有限责任公司勘察分院,湖南长沙410007

出　　处：《工程建设》2008年第4期24-27,共4页Engineering Construction

摘　　要：以杭兰公路滴水崖滑坡段上填下挖边坡为研究对象,利用GLE通用条分法,对设计的6种不同开挖坡率和6类不同路面距离滑带土层水平距离计算方案,进行了稳定性计算。经分析,发现上部卸载削坡,坡率不是越小越好;下部填筑滑带土层埋深越大越稳定,但是需要的填筑土方越多。对应于公路安全等级的坡率为1∶1.40;距离滑带土层的水平距离大于或等于3 m。Taking the upper digging and bottom filling slope in Dishuiya section of Hanglan road as the study object and making use of GLE generalized slices method, the stability calculations were made for the computing schemes with six kinds of different digging slope ratio and six types of horizontal distance between road surface and slip zone soil. Through analysis, it was found that it doesn＇t mean the smaller upper unloading slope ratio is better, and that the deeper bottom filling depth is more stable, which requires more cubic meter of earth. The best slope ratio for road safety is 1 ： 1.40 and the horizontal distance to slip zone soil is equal or more than 3.0 m.

关 键 词：边坡 通用条分法 坡率 

分 类 号：U416.14[交通运输工程—道路与铁道工程]