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L型挡土墙是一种新型支挡结构。通过在青藏铁路冻土地区设置试验段,分析了L型挡土墙的预制、施工准备工作、路堑开挖、吊装和回填、整坡等施工工序并提出施工要求。综合分析L型挡土墙现场地温测试试验所得数据资料,得出冻土融化深度变化的基本规律。L型挡土墙具有劳动强度低、对生态环境破坏少、运输吊装方便等优点,便于机械化施工,满足高原冻土地区气候环境恶劣的施工要求。
L-type retaining wall is a new type of retaining structure. By setting up the test section in the permafrost region of Qinghai-Tibet Railway, the construction process of L type retaining wall such as prefabrication, construction preparation, cutting, excavation, lifting and backfilling, and whole slope are analyzed and the construction requirements are put forward. Comprehensive analysis of L-type retaining wall site temperature test data obtained from the test, the melting of the basic law of melting depth obtained. The L-type retaining wall has the advantages of low labor intensity, less damage to the ecological environment, convenient transportation and lifting, and is convenient for mechanized construction and meets the construction requirements of the harsh climatic conditions in the plateau tundra.