结合某既有铁路路堤基床病害的整治工程,系统测试了加固后的路基基床在列车荷载作用下的长期累积下沉数据,重点分析了采用换填土工格室加筋砂垫层的软弱基床加固方案的社会经济效益,并对其耐久性进行了初步评价。研究表明,在基床换填深度相同的条件下,土工格室加筋砂垫层的技术经济效益明显优于传统的砂垫层方案,具有较好的推广应用价值。 Combined with the remediation project of the bed disease of an existing railway embankment, the long-term cumulative sinking data of the reinforced subgrade bed under train loading is systematically tested. The social and economic benefits of the reinforcement plan of the soft bed and the preliminary evaluation of its durability. The results show that the technical and economic benefits of geosynthetic-augmentated sand cushion are obviously better than those of traditional sand cushion under the same depth of bed replacement, which has a good value for popularization and application.