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盐渍土的溶陷变形和盐冻胀破坏是盐渍土地区工程建设主要病害之一。针对新疆玛纳斯县地区的盐渍土,开展现场与室内试验,研究该地区盐渍土的工程地质特性与湿陷特性。结果表明,该区盐渍土易溶盐含量为0.421%~1.989%,属中盐渍土;主要为非自重湿陷性盐渍土,部分场地为自重湿陷性盐渍土场地,湿陷程度为轻微~强烈。非自重湿陷性盐渍土的地基湿陷等级为I级(轻微),自重湿陷性盐渍土的地基湿陷等级为IV级(很严重),盐渍土湿陷起始压力平均值为71.1kPa。基于研究结果,对盐渍土的地基基础选型提出了对策与建议。
Salinization of soil deformation and salt frost swell destruction of saline soil project is one of the major construction projects. Aiming at the saline soil in Manas County, Xinjiang, site and laboratory experiments were carried out to study the engineering geological characteristics and collapsible characteristics of saline soil in this area. The results show that the content of soluble salt in saline soil is 0.421% -1.989%, which belongs to medium saline soil. It is mainly non-self-weight collapsible saline soil. Some of the sites are self-weight collapsible saline soil site, Degree is slight ~ intense. Ground subsidence grade of non-self-contained collapsible saline soil is Grade I (slight), grade of soil subsidence of self-contained collapsible saline soil is Grade IV (very serious), mean value of onset pressure of saline soil subsidence Is 71.1 kPa. Based on the research results, the countermeasures and suggestions are put forward for selecting the foundation of saline soil.