离子固化剂加固粉土物理力学特性试验
Experiment on physical and mechanical properties of reinforced silty soil by ion-solidified agent
徐宏 1王旭 2陈伟1
作者信息
- 1. 新疆工程学院土木工程学院,新疆乌鲁木齐 830023
- 2. 兰州交通大学土木工程学院,甘肃兰州 730070;道桥工程灾害防治技术国家地方联合工程实验室,甘肃兰州 730070
- 折叠
摘要
为研究离子固化剂对新疆乌鲁木齐地区粉质黏土的固化效果,开展了土体在不同离子固化剂掺量时的击实试验、剪切试验、渗透试验、崩解试验及三轴不固结不排水试验,对固化前后粉质黏土的物理力学特性、抗剪强度、崩解特性和渗透性进行了研究.结果表明:离子固化剂的最佳掺量为0.6 L/m3,离子固化剂的掺入可以增加粒子间的相互作用力,促进颗粒的紧密排列,改善粉质黏土的水敏性,降低土体最优含水率,提高密实度;离子固化剂可减小土体孔隙的尺寸和连通性从而降低土体的渗透系数;离子固化剂在最佳掺量时,破坏应力是素土的1.84倍,黏聚力和摩擦角分别较素土时增大了 1.55倍和1.07倍,黏结强度、抗剪强度显著提高;固化后的土体经过崩解,土体为团聚状,离子固化剂的掺入可以增强土体颗粒间的结合,进而提高水稳定性.
Abstract
In order to study the curing effect of ion-curing agent on silty clay in Urumqi,Xinjiang,compac-tion test,shear test,penetration test,disintegration test and triaxial unconsolidation and undrained test were carried out in this paper,and the physical and mechanical properties,shear strength,disintegration property and permeability of silty clay before and after curing were studied.The results show that the opti-mal content of ion-curing agent is 0.6 L/m3.The addition of ion-curing agent can increase the interaction force between particles,promote the compact arrangement of particles,improve the water sensitivity of silty clay,reduce the optimal moisture content of soil,and improve the compactness of soil.Ionic curing agent can reduce the size and connectivity of soil pores and thus reduce the permeability coefficient of soil.The failure stress is 1.84 times that of plain soil,the cohesion and friction angle are 1.55 times and 1.07 times higher than that of plain soil,and the bond strength and shear strength are significantly improved.After the solidified soil mass is disintegrated,the soil mass is agglomerated.The addition of ion curing agent can enhance the bonding between the soil particles and improve the water stability.
关键词
离子固化剂/最佳掺量/试验研究/粉土/物理力学特性Key words
Ionic curing agent/Optimal dosage/Experimental research/Silty soil/Physical and mechanical properties引用本文复制引用
出版年
2024
NETL
NSTL
万方数据