SSA土壤固化剂对黄土击实、抗剪及渗透特性的影响  

Effect of SSA soil stabilizer on compaction,shear strength and permeability characteristics of loess

作　　者：张丽萍[1,2] 张兴昌[3] 孙强 

机构地区：[1]西北农林科技大学资源环境学院,杨凌712100 [2]烟台南山学院食品与营养保健学院,烟台265706 [3]中国科学院水利部水土保持研究所,水利部水土保持生态工程技术研究中心,杨凌712100 [4]烟台市水利建筑勘察设计院,烟台264001

出　　处：《农业工程学报》2009年第7期45-49,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家973计划(2007CB106803);国家科技支撑计划(2006BAD09B06);教育部科研创新团队支持计划

摘　　要：为了探讨土壤固化剂对黄土力学特性的影响,通过黄土样中加入SSA土壤固化剂前后的击实试验、直剪试验和渗透试验的对比分析,研究了固化剂掺量、养护龄期与固化土击实、抗剪强度及渗透特性的关系。结果表明,随SSA土壤固化剂掺量增加,固化土的最优含水率有所降低,最大干密度有所增大;固化土的抗剪强度指标黏聚力和内摩擦角随固化剂掺量的增加和养护龄期的延长而增大,渗透系数随固化剂掺量的增加和养护龄期的延长而减小。在实际应用中,建议SSA固化剂最佳掺量为1%,养护龄期至少7d以上。For the purpose of investigating the effect of soil stabilizer on mechanical properties of loess,relationship among amount of soil stabilizer addition,curing age and compaction,shear strength,permeability of loess were studied by comparing the test results of compaction,direct shear and permeability before and after adding the SSA soil stabilizer in loess.The results showed that the optimum water content decreased and the maximum dry density increased with the increasing of SSA soil stabilizer content.Cohesion and internal friction angle increased with the increasing of soil stabilizer content and curing age.Permeability coefficient decreased with the increasing of soil stabilizer content and curing age.The study suggests that the suitable addition amount of SSA soil stabilizer should be about 1%and the curing age should be at least 7 d.

关 键 词：土壤固化剂 抗剪强度 渗透性 击实特性 黄土 

分 类 号：TU472.5[建筑科学—结构工程]