罗布泊硫酸盐岩路基盐胀敏感区域研究

Study on Salt Expansion Sensitive Region of Lop Nur Sulfate Rock Subgrade

以哈(密)罗(布泊)铁路罗布泊段的硫酸盐岩路基为研究对象,从温度的角度出发,设计了室内试验,确定了温度对硫酸盐岩盐胀的影响。通过建立路基试验段,埋设温度观测元件,掌握路基温度场。结合室内试验和现场试验数据进行综合分析,确定了自路基顶面以下2 m范围内为罗布泊的硫酸盐岩路基盐胀敏感区域,并提出以控制温度为主导思想的硫酸盐岩路基盐胀的防治措施,可为相关工程的建设提供借鉴。

In this paper,sulfate rock subgrade of Lop Nur section of Hami-Lop Nur railway was taken as the object of study.From the viewpoint of temperature,the indoor experiment was designed to determine the influence of temperature on the salt expansion of sulfate rocks.Through the establishment of subgrade test section,temperature observation elements were laid to grasp the temperature field of subgrade.Combined with laboratory experiment data and field test data,salt expansion sensitive region of sulfate rock subgrade of Lop Nur was determined within 2 m from the top of the subgrade,and the prevention and control measures of the salt expansion of sulfate rock subgrade with the dominant temperature were put forward,which can provide reference for the construction of related projects.