基于溶陷敏感因子的滨海氯盐渍土溶陷特性分析

Analysis of the Collapsibility Features of the Binhai Coastal Saline Soil Based on the Sensitive Factor of Collapsibility

滨海地区多分布有氯盐渍土,在多因素作用下,易发生溶陷,给其上建筑和道路工程造成极大安全隐患.本文基于室内溶陷试验,引入可直观描述各因素对土体溶陷性影响的溶陷敏感因子,研究了荷载、初始含水率、含盐量和初始干密度等因素对氯盐渍土溶陷特性的影响.结果表明:氯盐渍土溶陷敏感因子随荷载的增大表现为先增大后减小的特点;随初始含水率和初始干密度的增大而不断减小,且均为负值;随含盐量的增加而增大,且均为正值.基于溶陷敏感因子的盐渍土溶陷特性研究成果可对盐渍土地基工程起到指导作用.

The Binhai area is distributed with chlorine saline soil which prones to collapsibility under the action of many factors, which has induced great security risks to its construction and road engineering. Based on the indoor collapsibility experiment, we introduce the sensitive factor of collapsibility which can visually describe the effect of various factors in soil collapsibility. And the study explores the effects of load, initial water content, salt content and initial dry density on the chlorine saline soil collapsibility. The results are as follows： the sensitive factor of collapsibility of the chlorine saline soil shows first increased and then decreased with the load increasing; with the initial moisture content and initial dry density increases, the sensitive factor of collapsibility of the chlorine saline soil decreases, and the values are negative ; with the salt content increases, the sensitive factor of collapsibility increases and is positive. The research results of saline soil collapsibility based on the sensitive factor of collapsibility can guide for saline soil foundation engineering.