摘要
为研究饱和重塑黏性土的K_0率相关特性,采用自适应一维K_0固结仪进行固结试验。根据试验所得数据分析不同加载速率条件下K_0值对固结变形的影响,建立率相关数理式进行定量描述,并探寻K_0最大值的求解。研究结果表明:静止土压力系数K_0在试验设计的不同固结阶段影响不同;在加载固结段,符合加载速率越快,K_0值越大的规律;在恒载固结段,K_0值的变化与前期加载无关,均体现出随应变增加而减小的趋势。K_0具有过程值,且K_0最大值与加载速率正相关,若忽略该影响,对工程可能造成安全隐患。
In order to study the rate-dependence of K0 for saturated remolded cohesive soil,a self-adaption onedimensional K0 continuous loading consolidation test was designed.According to the experimental data,the effects of K0 value on consolidation deformation under different loading rates were analyzed,and a mathematical formula establishing rate-dependence was quantitatively described,and the solution of K0 maximum was explored.The results showed that the effects of the coefficient of earth pressure at rest K0 were different in two consolidation stages of the test design:in the loading consolidation stage,the faster the loading rate was,the greater the K0 value was;in the constant load consolidation stage,the change of the K0 value was not related to the earlier loading,which showed the tendency to decrease with the increase of the strain.In addition,K0 was varible in the process,furthermore,K0 maximum was positively related to the loading rate.If the effect was ignored,it would cause great security risks to projects.
作者
郑娟
赖秀英
伍肖
ZHENG Juan;LAI Xiuying;WU Xiao(Department of Civil Engineering,Putian University,Putian 351100,China;Taizhou Traffic Survey and Design Institute,Taizhou 318000,China)
出处
《工业建筑》
CSCD
北大核心
2019年第2期80-84,共5页
Industrial Construction
基金
福建省自然科学基金项目(2015J01645)
莆田学院引进人才科研启动费项目(2018056)
关键词
连续加载
静止土压力系数
饱和重塑黏性土
率相关
应力状态
K0过程值
自适应
continuous loading
coefficient of earth pressure at rest
saturated remolded cohesive soil
ratedependence
stress state
K0 process value
self-adaption
