岩土力学2017，Vol.38Issue(2)：557-564,8.DOI:10.16285/j.rsm.2017.02.032
伊犁深厚湿陷性黄土浸水入渗及沉降变形特征分析
Analysis of soak infiltration and deformation characteristics for thick collapsible loess in Ili region
摘要
Abstract
In-situ soaking tests were implemented on undisturbed and remolded soils in the Ili region to study the regularities of soaking infiltration and settlement of Ili loess.Surface settlement and water content were also monitored.The results show that transient saturated zone exists in the soil depending on temporary mechanical equilibrium among pore water pressure,air entry value and pore air pressure of the closed compressed gas.Undisturbed loess presents multistage settlement,which can be described by piecewise function,due to soil structure and stratum structure.On the contrary,there is no obviously multistage settlement for remolded soil due to the structural damage.The wetting front reaches 8.8 m in the 21st day of soaking test.At the same time,the settlement of the remolded soil (S4) is 120 cm,35％ larger than 78 cm of the undisturbed soil (S5).Due to the effect of stress concentration,unsaturated soil below the wetting front does not deform before the saturated soil near the wetting front reaches stable deformation.Therefore,the settlement of S5,less than the calculated value (85 cm) of the dead weight collapsibility volume,is not stable settlement deformation of saturated soil above wetting front.The results provide a basis for the understanding of mechanism of soaking infiltration and calculation of wetting deformation ofIli loess.关键词
深厚湿陷性黄土/现场浸水试验/暂态饱和区/沉降变形特征Key words
thick collapsible loess/field soaking test/transient saturated zone/settlement regularity分类
建筑与水利引用本文复制引用
安鹏,张爱军,邢义川,倪万魁,张博..伊犁深厚湿陷性黄土浸水入渗及沉降变形特征分析[J].岩土力学,2017,38(2):557-564,8.基金项目
国家自然科学基金项目(No.51379220,No.51279171) （No.51379220,No.51279171）
中国博士后科学基金项目(No.2016M602740) （No.2016M602740）
中央高校基本科研业务费(No.310826161001).This work was supported by the National Natural Science Foundation of China (51379220,51279171),the China Postdoctoral Science Foundation (2016M602740) and the Central University Fund Project (310826161001). （No.310826161001）
