既有线膨胀土路基病害发生机理及整治措施研究

归纳了既有线膨胀土路基病害的类型,从膨胀土矿物组成、分子结构、水及气候等因素阐述膨胀土路基病害的发生机理;在既有线膨胀土路基已有的病害治理措施基础上,根据蚌埠工务段管内膨胀土工程地质特性,提出使用隔水土工布封闭基床和压力注入石灰水浆液加固基床的整治措施,以期对膨胀土路基病害治理提供有益的思路。

Research on Disease Occurrence Mechanism and Treatment Measures of Expansive Soil Subgrade in Existing Lines

The type of expansive soil subgrade diseases in existing lines are summarized and the occurrence mechanism of expansive soil subgrade diseases is explained from factors like mineral composition, molecular structureof the expansive soil, water and climate, etc. Based on the treatment measures for some expansive soil subgrade diseases in existing lines, as per the engineering geological features of expansive soil in Bengbu track maintenance division, remediation measures of using sealing the foundation bed with waterproof geotextile and enhancing the foundation bed by filling lime slurry under force are put forward so as to provide good ideas for treatment of expansive soil subgrade disease.