西宁盆地细粒盐渍土地基盐胀特性与侧限力学特性研究  

Salt expansion and lateral mechanical properties of fine-grained saline soil foundation in Xining basin

作　　者：杨述亮[1] 张文[1,2] 温昱 李斌[1] 

机构地区：[1]青海大学,青海西宁810016 [2]青藏高原北缘新生代资源环境重点实验室,青海西宁810016

出　　处：《青海大学学报（自然科学版）》2017年第6期61-68,共8页Journal of Qinghai University(Natural Science)

基　　金：青海省级重点实验室建设项目(2012-Z-Y14);青海省自然科学基金项目(2012-Z-705);国家自然科学基金项目(51468055)

摘　　要：为了解细粒盐渍土盐胀基本特性以及侧限条件下的基本力学特性,文中通过在西宁盆地细粒盐渍土化学成分分析的基础上,对西宁盆地细粒盐渍土在侧限环境下西宁盆地细粒盐渍土的盐胀力学模型进行研究。结果表明:西宁盆地细粒盐渍土地基盐胀与含水量、易溶盐类型和数量、覆压影响等因素相关,其中,同种硫酸盐含量的减少、覆压的增加,可以抑制盐胀量。室内试验表明盐渍土的强度指标在一定限度内随含盐量的升高而升高。In order to understand the basic properties of salt heaving of fine - grained saline soil and the basic mechanical properties under the confined conditions, based on the analysis of chemical composition of fine - grained saline soil in Xining basin, the salt swelling mechanics model of fine saline soil in Xining basin under the confined environment in Xining basin is studied. The results show that salt expansion of fine saline soilis related to the water content, the type and amount of sol-uble salts, the influence of overburden . The decrease of surfate content and the increase of overbur-den pressure can restrain the salt expansion. The overburden pressure can suppress salt heaving. The strength index of saline soil increases with salt content within a certain limit.

关 键 词：盐胀 细粒盐渍土 变形特性 西宁盆地 

分 类 号：TU448[建筑科学—岩土工程] TU411[建筑科学—土工工程]