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本文通过断裂断层泥的矿物组分特征、粒度成分结构和分形、成熟度和目前活动度、石英碎屑形貌SEM观测来分析与评价镇江至扬州长江公路大桥桥基断裂的抗震和抗断问题,得出主要影响桥基稳定性的是NW—NNW向世业洲场区优势断裂,主要活动时间为Q_3—Q_2。该研究对在断裂带上建设特大型桥梁工程的区域稳定性综合研究和论证,以及对大桥工程的合理选址、设计和确保安全具有重大实际意义。
This paper analyzes and evaluates the seismic and anti-breakage of the fracture of Zhenjiang-Yangzhou Yangtze River Highway Bridge through the observation of the characteristics of mineral components, the structure of grain size, fractal, maturity and current activity, the SEM observation of quartz debris morphology It is concluded that the NW-NNW has a dominant fracture effect on the Shiyezhou area, and the main activity time is Q_3-Q_2. The research is of great practical significance for the comprehensive study and demonstration of the regional stability of the construction of extra-large bridges in the fault zone, as well as for the reasonable site selection, design and safety assurance of the bridge project.