| With the rapid development of economy and the regional communication is frequent day after day, the traffic volumes of expressway are rapidly increasing. A considerable number of expressways in service are no longer satisfying need of the increasing traffic volumes of expressway, which serious influence economy fast development. Regarding this, more and more highways are pending to be reconstructed or widened. In our country, the expressway widening is an important issue which starved for solving in highway construction in this century. In this paper, aimed at the issues of differential settlement of widen roadbase in the highway expansion; unifies Xi'an to the Tongguan highway widening project, the changing law of engineering properties of ground under old and new embankments are analyzed by using site survey, field test, laboratory test and so on. Used the method of JC to analyze the reliability of the differential settlement of Xi'an to the Tongguan highway widening project, and has carried on the analysis to the influencing factor. Main research content including the following several aspects:(1) Selects some typical sections, through the geological reconnaissance, soil mechanics assay, researched the changing law of engineering properties of ground under old and new embankments.(2) Used the method of JC to carry on the reliability analysis of differential settlement in the Xi-Tong highway reconstruction and extension project, established the differential settlement reliability anatomic model.(3) Has carried on reliability computation to the Xi-Tong highway reconstruction and extension project. |
