映汶高速公路桥梁防震减灾技术的应用

摘要

映汶高速公路位于“5·12”汶川大地震的极重灾区。基于汶川地震灾区桥梁震害调查，结合映汶高速公路的桥梁设计，介绍高烈度地震区如何进行桥位选择、桥型方案的确定，提出新型的防落梁构造、减隔震技术等主要防震减灾措施，并在实际工程中取得了良好的应用效果，可在同类型高速公路工程中推广应用。%The Yingxiu-Wenchuan Expressway is located in extremely stricken area of the “5 · 12”Wenchuan earthquake. Based on investigation for seismic disasters of bridges in Wenchuan earthquake stricken area and in combination with design of bridges on Yingxiu-Wenchuan Expressway, this paper introduces how to select bridge locations and determine bridge type schemes in high-intensity seismic areas and proposes new major seismic prevention and disaster mitigation measures including structure for preventing bridge collapse and seismic reduction and isolation techniques, etc. These measures have achieved good application effects in practical projects and can be popularized in expressway projects of the same type.