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This thesis presents a research program on pavement and subgrade structure in the second phase of Guangbei Section of National Highway 108 (Beijing to Kunming).
本论文针对国道108线广元段广北二期工程的路面路基结构及使用状态进行了试验研究。
The paper bridge transition section Approach Road subgrade settlement problem, through the analysis of its causes, the law of subgrade settlement and subgrade settlement governance measures.
论文针对路桥过渡段引道路基的沉降问题，通过其原因分析，对路基沉降的规律和路基沉降的治理措施进行了研究。
For a soft ground subgrade, the widening engineering of highway focuses not only on the soft ground fills in new section, but on the joint of new and old subgrade.
在软土地基上，公路路基的加宽工程除了要重点解决好填方路段新路基下软基处理方案，还要处理好新老路基之间的衔接即新老路堤的不均匀沉降问题。
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