山区高速公路弃土场选址分类方法及其稳定性分析  

The methods for site choosing and stability analysis of mountain highway spoil ground

作　　者：彭立[1] 黄伟伟[2] 徐希武[2] 李宏泉[1] 方理刚[2] 吴仁铣[2] 

机构地区：[1]湖南省交通规划勘察设计院,湖南长沙410008 [2]中南大学土木工程学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2011年第6期75-79,共5页Journal of Railway Science and Engineering

基　　金：西部交通建设科技项目(200731822313)

摘　　要：通过现场调研,提出锁口型、敞口型、坡面型3种弃土场选址分类方法。运用Bishop-圆弧搜索法模拟弃土场坡体滑动面可能发生的位置,采取加固与防护措施,并周期性地监测墙背土压力变化情况。结果表明:锁口型弃土场是最安全、最合理的设计方法,由于弃土场土体的松散特性,弃土场的局部稳定性较差,坡体上部土体对拦挡结构产生的土压力最大。该研究结果可为今后类似工程提供借鉴。According to site investigation,three methods for site choosing of spoil ground,which are locking-type method,exposure-type method,slope-type method,were proposed firstly.Using Bishop-arc searching method to simulate the most possible place of sliding surface of slope in the spoil ground,we adopted measures of strengthening and protection.We monitored the changing of soil stress of wall back periodically.The results shown that the locking-type method is most safety and reasonable.Because of the loose characteristics of soil in the spoil ground,the local stability become worse,and we find the soil pressure of supporting-structure caused by the upper soil of slope is maximum.The study of this paper may provide reference for the similar projects in the future.

关 键 词：弃土场 锁口型 稳定性 土压力 

分 类 号：U412[交通运输工程—道路与铁道工程]