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既有铁路经多年运营后,路基运营状态恶化,路基承载力、压实度、边坡状况需要重新评估。既有铁路勘察存在路线长、时间短、不便携带大型勘察机械、不能干扰行车等方面限制。针对江苏宁启铁路的实际情况,对路基各种勘察方法进行对比研究,解决了石灰土改良路基硬壳层动力触探等技术难点,提出了合理的路基勘察手段与人员组织,为既有铁路改造工程的设计与施工提供了可靠的资料。
After years of operation of existing railways, the operation status of subgrade is deteriorated, the bearing capacity of subgrade, compaction degree and slope condition need to be re-evaluated. The existence of existing railway survey route long, short time, inconvenient to carry large reconnaissance machinery, can not interfere with traffic restrictions. According to the actual situation of Nanjing-Qijiang Railway, a comparative study of various survey methods of roadbed is conducted, which solves the technical difficulties of lime-soil improved hard-shell dynamic penetration of embankment and proposes reasonable means and staffing for subsidence investigation of existing railway The design and construction of the reconstruction project provided reliable information.