摘要
为研究西弥浦泵闸工程防汛墙及闸室地基粉土改良重塑后黏质粉土力学性质,设计开展三轴力学试验,获得黏质粉土击实试验下黏质含量与最优含水量、最大干密度分别为线性正相关、负相关关系,黏质含量增大5%,最优含水量增长8.5%。原状粉土加载应力低于黏质粉土,且黏质含量增大黏质粉土加载应力愈大,围压100 kPa下的黏质颗粒含量增长5%可提升黏质粉土强度22.6%。冻融次数对黏质粉土具有阶段节点,在冻融8次前、后区间内分别为递减、递增特征,且黏质含量增大冻融效应对黏质粉土影响更为显著。研究成果可为水利工程中场地地基土体改良处理提供一定参考。
In order to study the mechanical properties of the clay silt after improvement and remolding of the flood control wall and the foundation silt of the Ximipu pump and gate project,a triaxial mechanical test is designed and carried out.The clay content is linearly positively correlated with the maximum value optimal water content under the compaction test of the clay silt while the clay content is linearly negatively correlated with the maximum dry density.When the clay content in⁃creases by 5%,the optimal water content increases by 8.5%.The loading stress of the undisturbed silt is lower than that of the clay silt.The higher the clay content,the greater the loading stress of the clay silt.The increase in the content of clay particles at a confining pressure of 100kPa by 5%would lead to the increase of the strength of the clay silt by 22.6%.The number of freeze-thaw cycles has a stage node for the clay silt,decreasing and increasing in the interval before and after the 8 freeze-thaw cycles,respectively,and the effect of freeze-thaw on clay silt is more significant with the increase of clay con⁃tent.The research results can provide some reference for the soil improvement and treatment of site foundation in water con⁃servancy projects..
作者
李旨洪
LI Zhi-hong(Jiangxi Water Conservancy and Hydropower Construction Co.,Ltd.,Nanchang 330025,China)
出处
《海河水利》
2021年第4期86-90,共5页
Haihe Water Resources
关键词
西弥浦泵闸
地基
重塑土
力学
Ximipu pump and gate
foundation
remolded soil
mechanics
