【摘要】 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。更多还原

【Abstract】 The scientific investigation on liquefaction induced by Wenchuan earthquake is outlined and presented herein,and new aspects concerning on liquefaction are analyzed and proposed.The results show:(1) the liquefaction and associated damage in the event are dramatic,involving widest areas and abundant macrophenomena;(2) the features of liquefaction are high water-jet,short duration and small quantity of ejected materials,but the categories of ejected sand are various;(3) five remarkable features are gravel liquefaction,liquefaction in seismic intensity VI regions,deep soil liquefaction,liquefaction exacerbation effect on structures and most liquefaction with cracks;(4)evaluation methods of gravel soil,mechanism and predicting methods of cracks caused by liquefaction,mechanism and predicting methods of liquefaction in seismic intensity VI and deep soil liquefaction,conditions of liquefaction exacerbation effect and energy absorption effect and liquefaction detection techniques are also new aspects.Therefore,it is completely necessary to develop new monitoring and measurement technologies and establish geotechnical earthquake engineering in-situ testing labs.更多还原