黄土场地震动液化实例
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摘要
湿度大的黄土在地震作用下会发生液化和震陷,已在室内动力试验和古地震的调查中得到了证实。目前工程规范对黄土的液化预测判别尚缺乏经验,暂未列入规范。本文介绍了一些黄土地基处理施工的实例,证明饱和黄土在受到机械振动或冲击作用的影响后,会产生液化使所处理的地基下沉,对开展黄土液化机理、液化判别与危害评价方法及工程预防措施的研究具有现实意义。
It's possible that liquefaction and seismic collapse could occur during earthquake in high-humidity loess,which has been proved to be true both in laboratory dynamic test and investigation of paleo-earthquakes.At present,the code of engineering doesn't put the predictive judgment for the liquefaction of loess into consideration.In this paper,some cases of loess ground treatment are introduced,in which the treated saturated loess liquefied,thus the ground sank,caused by mechanical shaking or impact.It is meaningful to research on the liquefaction mechanization,liquefaction discrimination,harmfulness judgment and engineering precautionary measure for loess.
It's possible that liquefaction and seismic collapse could occur during earthquake in high-humidity loess,which has been proved to be true both in laboratory dynamic test and investigation of paleo-earthquakes.At present,the code of engineering doesn't put the predictive judgment for the liquefaction of loess into consideration.In this paper,some cases of loess ground treatment are introduced,in which the treated saturated loess liquefied,thus the ground sank,caused by mechanical shaking or impact.It is meaningful to research on the liquefaction mechanization,liquefaction discrimination,harmfulness judgment and engineering precautionary measure for loess.
引文
[1]建筑抗震设计规范(GB50011-2001)[S].北京:中国建筑工业出版社,2001.
[2]岩土工程勘察规范(GB 20021-2001)[S].北京:中国建筑工业出版社,2002.
[3]《岩土工程手册》编写委员会.岩土工程手册[M].北京:中国建筑工业出版社,1994.
[4]姜朴.土动力学[A]∥第6届全国土力学及基础工程学术会议论文集[C].上海:同济大学出版社;北京:中国建筑工业出版社,1991:53-62.
[5]刘汉龙,余跃心,王兰民,等.强夯黄土地基液化试验研究[A]∥土动力学与岩土地震工程[C].北京:中国建筑工业出版社,2002:218-224.
[6]王兰民,刘红玫,李兰.饱和黄土液化机理与特性的试验研究[J].岩土工程学报,2002,20(1):89-94.
[2]岩土工程勘察规范(GB 20021-2001)[S].北京:中国建筑工业出版社,2002.
[3]《岩土工程手册》编写委员会.岩土工程手册[M].北京:中国建筑工业出版社,1994.
[4]姜朴.土动力学[A]∥第6届全国土力学及基础工程学术会议论文集[C].上海:同济大学出版社;北京:中国建筑工业出版社,1991:53-62.
[5]刘汉龙,余跃心,王兰民,等.强夯黄土地基液化试验研究[A]∥土动力学与岩土地震工程[C].北京:中国建筑工业出版社,2002:218-224.
[6]王兰民,刘红玫,李兰.饱和黄土液化机理与特性的试验研究[J].岩土工程学报,2002,20(1):89-94.
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