摘要
为了分析软基地表硬壳层的作用效应,采用Ansys有限元方法,通过数值计算,分析软土地基硬壳层厚度与变形模量对竖向附加应力扩散的影响,并通过灰关联法,定量地评价二者对竖向附加应力扩散的影响程度。研究认为:软土地基上覆硬壳层的存在,有利于路基竖向附加应力的均匀扩散,并且硬壳层厚度越大、变形模量越高,竖向附加应力扩散越均匀,扩散范围越广;灰色关联度计算结果表明硬壳层厚度主要影响竖向附加应力扩散的范围,而硬壳层变形模量则主要影响竖向附加应力扩散的均匀程度。
In order to analyze the action-effect of soft clay foundationwith dry crust and based on the Ansys method, the effects of thickness and deformation modulus of dry crust on spreading of vertical additional stress for soft clay foundation was studied with numerical analysis, and also the quantitative evaluation of influence degree on spreading of vertical additional stress was analyzed. The results showed that the existence of soft clay foundation with overlying dry crust was advantageous to the spreading of vertical additional stress, and the thicker of dry crust and the higher of deformation modulus, the more evenly and wider of spreading for vertical additional stress; Grey correlation calculation results showed that dry crust thickness mainly affected the spreading scope of vertical additional stress, and deformation modulus mainly affected the uniformity.
出处
《公路工程》
北大核心
2016年第6期199-203,共5页
Highway Engineering
基金
海南省交通科技项目(JT20140898003)
关键词
软土地基
硬壳层
竖向附加应力
灰色关联度
soft clay foundation
dry crust
vertical additional stress
grey relational degree
