辽东湾绥中区砂土液化的预测

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。

Prediction of Sandy Soil Liquefaction in Sui Zhong Area of Liao Dong Bay

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.