针对路基软土层的施工，提出换填土法施工的技术方案，并通过国道111线两支箭工程给予验证。
To construct the bed of soft soil layer, we propose the technical scheme for construction with replacing soil. It was verified by the Liangzhijian Project on 111 national road.
基于回归理论对沉降数据进行分析，力求找到路基沉降与填土高度和硬壳层厚度、软土层厚度之间的规律。
Base on regression theory analyse the data, striving to find the rule of the settlement of roadbed and the embankment height, thickness of crust with high strength and soft clay.
影响软土路基侧向变形的主要因素有：地基处理型式、土层结构、软土厚度和路堤高度。
There are some main influence factors, which are the manners of improvement of foundation, soil layer structure, soft soil depth and embankment height.
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