风积沙路基稳定性分析  

The stability analysis of eolian-sand subgrade

作　　者：王迎[1,2] 杨鹏[2] 周燕[1] 

机构地区：[1]天津城建大学土木工程学院,天津300384 [2]长安大学公路学院,陕西西安710064

出　　处：《公路工程》2015年第1期18-22,28,共6页Highway Engineering

基　　金：国家自然科学基金项目(51208337);天津市市政公路行业科技创新计划项目(2013-04)

摘　　要：风积沙广泛分布于沙漠地区,储量丰富,取材方便,运用风积沙作为沙漠地区高速公路路基填筑的主要材料,是一种新探索,目前缺乏系统的研究和工程实践。针对风积沙作为路基填料的稳定性问题,全面分析风积沙路基的特点和主要表现形式,经理论分析建立两种可能滑动失稳的模型,在考虑填料性质、压实度等影响因素的条件下进行风积沙路基稳定性分析,由此得到路基安全系数的推导公式和稳定性评价方法,并结合工程实例对稳定性分析方法进行验证,进而可用于设计和施工指导。Eolian-sand is widely distributed in desert areas. Because of its abundant reserve and easy obtaining,regarding the eolian-sand as the packing of highway subgrade is a new exploration in the desert,which is lack of systematic research and engineering practice. For the stability problem of eoliansand subgrade,this article comprehensive analysis eeolian-Sand Subgrade characteristics and main forms,in which established two possible models of sliding instability by the theoretical analysis. Derivation the theoretical formula of the subgrade safety factor and stability evaluation method in considering the nature of the packing factor and the degree of compaction conditions. And combine with the engineering examples to validate methods,which can be used for design and constrution.

关 键 词：风积沙 路基 稳定性 压实度 安全系数 

分 类 号：U416.1[交通运输工程—道路与铁道工程]