察尔汗盐湖地区盐渍土浸水溶陷对路基施工的影响及防排水措施

Effect of Collapsibility of Saline Soils on Subgrade Construction and Waterproofing and Drainage Measures in Qarhan Saline Soil Region

以察尔汗盐湖地区察尔汗～格尔木高速公路沿线的盐渍土为研究对象,着重对该土在浸水情况下的溶陷特性进行了模拟试验研究,为盐渍土地区的公路设计和施工提供合理的技术指导.运用室内单轴压缩试验,利用单线法模拟出现场浸水后施工的特征,并将其试验结果与常规试验结果进行了对比分析,研究了盐渍土在浸水导致加剧溶陷后对路基施工所产生的不利影响并提出了合理的防治措施.

In this paper, a simulation experiment is carried out to study the collapsibility of the saline soils along Qarhan-Golmud Expressway in the case of immersion, and reasonable instruction is provided for the design and construction about highway built in saline soil region. Single-line uniaxial compression test is utilized to simulate characteristics of construction after the rainfall, and then a comparative analysis, between experimental results and theoretical results is processed. Based on the outcome of the experiment, this paper makes a summing up of the adverse effect for subgrade construction on saline soils which is caused by the intensified collapsibility resulting from the immersion; also reasonable control measures are proposed.