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第一节桥位和地基一、进行桥位选择时,应搜集基本烈度、地震活动情况和区域性地质构造等资料,并加强地质、水文地质和历史震害情况的现场调查和勘察工作,查明对桥梁抗震有利、不利和危险的地段,采用“避重就轻”的方法,充分利用对抗震有利地段选定桥位。抗震危险地段系指:a、发震断层及其邻近地段;b、地震时可能发生大规模滑坡、崩塌等的不良地质地段。抗震不利地段系指:a、软弱粘性土层、可液化土层和土层严重不均一的地段;
Section 1 Bridge Site and Foundation 1. When selecting the bridge site, basic intensity, seismic activity and regional geological structure should be collected, and on-site investigation and investigation of geological, hydrogeological and historical earthquake damage should be strengthened. The section of the bridge that is favorable, unfavorable and dangerous for earthquake resistance shall adopt the method of avoiding risks and make full use of the selected bridge positions in favorable locations for earthquake resistance. Seismic hazard refers to: a, seismogenic faults and adjacent areas; b, the earthquake may occur large-scale landslides, landslides and other adverse geological conditions. Seismic adverse conditions refer to: a, soft clay layer, liquefiable soil layer and soil layer is not uniform;