辽东湾绥中区砂土液化的预测
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摘要
本文依据大量的土质调查资料,对该海区的浅层砂性土,在地震和波浪荷载作用下,进行了液化可能性的预测。结果表明:该海区在地震烈度为7度的情况下,海底20 m以上砂性土不会发生液化现象,在8、9度条件下可发生轻微至中等液化;在50年一遇的风浪荷载作用下,海底20 m以上砂性土不会发生液化。故在进行海中建筑物地基基础设计时,应以地震力引起的地基土液化为控制标准。
This paper predicts the liquefaction possibility of the shallow layer sandy soil in this area under the action of earthquake and wave loads, based on a lot of soil quality investigation information. The results show: Sandy soil 20 m below seabed can not be liquefied under the condition of magnitude of 7 earthquake intensity in the sea area, slight to middle liquefaction can be occured under the condition of magnitude of 8. 9 earthquake intensity. The sandy soil 20 m below seabed can not be liquefied under the action of wind and wave loads of 50-year occurrance. So the liquefaction of foundation soil resulted from earthquake force should be regarded as governing standard (load) in the foundation soil design for an offshore structure.
This paper predicts the liquefaction possibility of the shallow layer sandy soil in this area under the action of earthquake and wave loads, based on a lot of soil quality investigation information. The results show: Sandy soil 20 m below seabed can not be liquefied under the condition of magnitude of 7 earthquake intensity in the sea area, slight to middle liquefaction can be occured under the condition of magnitude of 8. 9 earthquake intensity. The sandy soil 20 m below seabed can not be liquefied under the action of wind and wave loads of 50-year occurrance. So the liquefaction of foundation soil resulted from earthquake force should be regarded as governing standard (load) in the foundation soil design for an offshore structure.
引文
1 李大华,邢延等.辽东湾锦州9-3人工岛场地设计地震反应谱评定.中海石油工程设计公司,1993． 2
2 Bohai Mckelland geoscience consultants. Liquefaction study man-made island JZ9-3-A Liaodong Wan, BoHai,March 1991．
3 Ishihara Kenji. Soil response in cyclic loading Induced by earthquakes, traffic and waves. lecture Presented to the 7th. Asian regional conference on soil mechanics aod Foundation Engineering, Haifa, Iarael Aug. 14 to 19, 1983．
4 刘颖,王治昆等.海洋石油开发区海底震害预测与小区划.国家地震局工程力学研究所.1990
2 Bohai Mckelland geoscience consultants. Liquefaction study man-made island JZ9-3-A Liaodong Wan, BoHai,March 1991．
3 Ishihara Kenji. Soil response in cyclic loading Induced by earthquakes, traffic and waves. lecture Presented to the 7th. Asian regional conference on soil mechanics aod Foundation Engineering, Haifa, Iarael Aug. 14 to 19, 1983．
4 刘颖,王治昆等.海洋石油开发区海底震害预测与小区划.国家地震局工程力学研究所.1990
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