摘要
考虑碱液浓度、迁入时间两个因素,通过浸泡试验方法,研究碱液迁入条件下碱污染红土的剪切、压缩等工程特性,分析碱液迁入与红土间的相互作用。试验结果表明:碱液浓度较低时,碱污染红土的抗剪强度、黏聚力、内摩擦角、压缩模量减小,低于素红土;碱液浓度较高时,碱污染红土的抗剪强度、黏聚力、内摩擦角、压缩模量增大,高于素红土;随碱液浓度增大,碱污染红土的抗剪强度、黏聚力、内摩擦角、压缩模量逐渐增大。随迁入时间延长,低浓度下,碱污染红土的抗剪强度、黏聚力、内摩擦角、压缩模量缓慢减小,存在极小值;高浓度下,碱污染红土的抗剪强度、黏聚力、内摩擦角、压缩模量明显增大,存在极大值。碱液迁入引起红土工程特性变化的实质在于迁入过程中碱液与红土间的相互作用,可以分为初期、中期、后期三个阶段来解释。
Under the alkali ingoing condition, considering two influence factors which were the lye concentration and ingoing time, the engineering properties of alkali contamination laterite under ingoing condition were examined by the indoor shear strength and compression test, and the action process of alkali and laterite was analyzed. The results showed that shear strength, cohesion, internal friction angle and compression modulus of the alkali polluted laterite were lower than the plain laterite when the alkali concentration was low; the shear strength, cohesion, internal friction angle and compression modulus of the alkali polluted laterite were higher than the ones of the plain laterite when the alkali concentration was high; with alkali concentration increase, the shear strength, cohesion, internal friction angle and compression modulus of the alkali polluted laterite were gradually increased. With the increasing of ingoing time, at a low concentration, the shear strength, cohesion, internal friction angle and compression modulus of the pollution laterite changed slowly, and there was a minimal value. At a high concentration, the shear strength, cohesion, internal friction angle and compression modulus of the polluted laterite increased significantly, and there was a maximum value. The essence of lye ingoing to cause the change of the laterite properties was the interaction between the alkali and laterite during the ingoing process, which could explained by early, middle and late stages.
出处
《工业建筑》
CSCD
北大核心
2016年第2期78-83,4,共7页
Industrial Construction
基金
国家自然科学基金项目(51168022
51568031)
云南应用基础研究计划重点项目(2013FA033)
昆明理工大学分析测试基金项目(20150261)
关键词
碱液迁入
碱污染红土
剪切特性
压缩特性
碱-土作用
lye ingoing
alkali contaminated laterite
shear properties
compression properties
action of alkali andlaterite
