石灰处理软土路基深度与土基当量回弹模量关系研究  

The relation between the depth of lime treating soft soil subgrade and the soil base equivalent resilience modulus

作　　者：马士宾[1] 孙敬福 袁文瑞[1] 陈奕[1] 

机构地区：[1]河北工业大学土木工程学院,天津300401

出　　处：《河北工业大学学报》2015年第5期97-101,共5页Journal of Hebei University of Technology

基　　金：河北省高等学校科学技术研究项目(ZD2014099)

摘　　要：在室内外试验基础上,针对现行规范换算方法不适用于低模量比石灰土路基情况,根据弹性层状体系理论以及弯沉等效原则,采用KENPAVE和Minitab软件回归出了精度和可靠性较高的换算公式.并通过此公式分析了石灰处理软土路基深度与土基当量回弹模量间的关系.分析结果表明,随石灰处理深度的增加,路基顶当量回弹模量值也在增大,而且增大幅度明显;在达到相同当量回弹模量设计目标时,粘性土的处理深度要大于砂性土的处理深度,而且处理深度相差也非常明显.最后通过实例说明本文当量回弹模量换算公式可用来代替规范中换算公式计算低模量比当量回弹模量值.为软土路基设计与施工提供指导.Faced with the current criterion conversion method is not suitable for low modulus ratio and based on the indoor and field tests, this paper uses KENPAVE and Minitab software to regress accurate and reliable conversion formula according to the elastic multi-layer theory and principles of displacement equivalence. Then the relation between the depth of lime treating soft soil and the soil base equivalent resilience modulus are analyzed. Analysis showed that the soil base equivalent resilience modulus values can increase significantly with the increase of lime treated subgrade depth. When reaching the same soil base equivalent resilience modulus design value, the processing depth of cohesive soil was higher than the processing depth of sand soil, and processing depth difference was also very obvious. Finally, this paper uses a practical example to illustrate that the equivalent resilience modulus conversion formula can be used to replace the current criterion conversion formula to calculate lime treating soft soil subgrade equivalent resilience modulus of low modulus ratio. This research can provide reference for design and construction of soft soil subgrade.

关 键 词：粘性土 砂性土 路基 模量 含水量 压实度 

分 类 号：U416.1[交通运输工程—道路与铁道工程]