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汶川大地震液化的特点及带来的新问题

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Keywords: 汶川大地震,液化,特点,新问题

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Abstract:

总结汶川8.0级大地震液化及其震害科学考察结果,分析此次地震液化带来的新问题。结果表明,汶川大地震中液化及其震害现象显著,是建国以来液化涉及区域最广、液化宏观现象最为丰富的一次;本次地震液化宏观现象特点为喷水高、持时短、喷砂量小但喷砂类型十分丰富;砂砾土液化、Ⅵ度区内场地液化、深层土液化、无液化减震以及液化普遍伴随地裂缝是此次地震液化5个突出特征;砂砾土液化判别技术、液化引起地表裂缝机理和预测方法、Ⅵ度区内场地液化与深层土的液化机理和预测方法、液化加减震发生条件、场地液化现场判定与识别技术等是新的课题。为解决上述问题,应优先发展岩土地震工程观测技术及建设岩土地震工程实验场。

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