不同增强体粉土复合土动力特性试验研究  

Test study on the dynamic characteristics of silt composite samples with different reinforcements

作　　者：曾国红[1] 白晓红[1] 张卫平[2] 王梅[1] 

机构地区：[1]太原理工大学建筑与土木工程学院,山西太原030024 [2]太原市建筑设计研究院,山西太原030012

出　　处：《西安建筑科技大学学报（自然科学版）》2009年第5期637-642,共6页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50578104);太原市专项基金资助项目(07010779)

摘　　要：通过水泥土增强体粉土复合试样、灰土增强体粉土复合试样的动三轴试验,研究了粉土复合土的动力特性,分析了增强体刚度、置换率、围压、干密度、含水量的影响.试验结果表明水泥土增强体的设置对粉土动弹性模量Ed及最大动弹性模量Edmax的提高程度比灰土增强体大;两种复合试样的Ed及Edmax均随增强体置换率的增加而增大,随围压的增加而增大,随干密度的增加而增大,随含水量的增加而减小;增强体粉土复合试样在各种情况下的动弹模量归一化曲线依增强体置换率有序排列,试验点依次分布在各自对应的狡窄带宽内.文中同时给出两种增强体复合粉土在不同置换率下动弹模量归一化曲线的回归公式.Based on the dynamic triaxial tests, the dynamic characteristics of silt composite samples with cement-soil reinforcement Or lime-soil reinforcement are studied. Also the influences of reinforcement rigidity, replacement ratio, confining pressure, initial dry density and moisture content are analyzed. It is indicated that compared with lime-soil reinforcement, cement-soil reinforcement gives more improvement on the dynamic modulus Ed and the maximum dynamic elastic modulus Edmax of silt. Whether with cement-soil reinforcement or lime-soil reinforcement, the Ed and Edmax of silt composite sample increases as replacement ratio, confining pressure , initial dry density increase, but decreases as the moisture content increases. The Ed/Edmax- εd curve of silt composite sample distributes respectively within a narrow area in turn by replacement ratio. Lastly the regression formula of Ed/Edmax-εd curves are put forward based on experiment data.

关 键 词：水泥土增强体 灰土增强体 粉土复合土 动荷载 动弹性模量 

分 类 号：TU472[建筑科学—结构工程]