【作者】 王斌； 杨军； 童立元；

【Author】 WANG Bin,YANG Jun,TONG Li-yuan (School of Transportation,Southeast University,Nanjing 210096,China)

【机构】 东南大学交通学院；

【摘要】 地震时由于液化引起的地面大变形是造成液化区公路、铁路、桥梁等生命线工程震害的最主要原因之一。合理预测地面大变形对于工程建设安全、防灾减灾等具有积极意义。本文利用标准贯入试验和静力触探试验对江苏省宿淮高速公路部分可液化地段可能发生的液化大变形进行了预测。研究分析认为:CPT原位测试方法较之SPT测试方法对土层的扰动较小,且试验数据沿土层深度连续分布,可以较好地反映土层土性沿深度方向的变化情况,预测效果良好。这两种方法简单易行、直观可靠,值得高烈度地震区工程建设应用和推广。更多还原

【Abstract】 The large ground displacement(LGD) induced by seismic liquefaction is one of the main reasons which cause the damage of the highway,railway,bridge and the other lifeline engineering.It has positive significance for the safety of engineering and the disaster prevention and reduction to forecast the LGD reasonably.In this paper, an approach to estimate liquefaction-induced ground deformations using either CPT or SPT data is applied to predict the potential LGD which may happen on the partial region of the Su-huai speedway in Jiangsu Province. The outcome indicates that the proposed approach combines available results from laboratory test,capture the mechanisms of liquefaction-induced lateral spreads,and characterize the major factors influencing LGD. Furthermore this method is relatively simple and can be applied with only a few additional calculations following an SPT- or CPT-based liquefaction-potential analysis.These two simple,intuitive and reliable methods are worthy of application and promotion for the engineering in high-intensity earthquake zone.更多还原