路基作为轨道的基础,由于受复杂的地质、地势、气候、温度等条件影响,使其成为线路结构中最薄弱、最不稳定的环节。为确保高铁线路的质量、列车的安全及正常运行,必须严格控制路基的沉降变形。 Subgrade as the basis of orbit, due to complex geological, topography, climate, temperature and other conditions, making it the weakest line structure, the most unstable link. In order to ensure the quality of the high-speed rail line, the safety and normal operation of the train, the settlement of the subgrade must be strictly controlled.