沿软弱夹层滑动的地震滑坡分析
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摘要
考虑超孔隙水压和滑动面几何形状改变对地震滑坡滑动过程的影响,推导纽马克法与瑞典条分法结合起来的滑距计算方法(即改进的NS法)。该方法可计算沿软弱夹层滑动的大滑距地震滑坡。通过对比改进的NS法和改进的NJ法所得计算结果的异同,分析2种计算方法的特点。此外,还分析地下水位、内摩擦角和土条宽度对计算结果的影响。
The earthquake-induced large displacement of slope containing a weak layer was calculated by extended Newmark with Sweden method(extended NS method). In the methods,the effects of excess pore water pressure and the change of sliding plane geometry on displacement are rationally evaluated. The details of extended NS method were described. A comparison between extended NS method and extended NJ method was performed on a calculation example. The characteristics of these two methods were described. In addition,the effects of ground water level,internal frication angle and slice width on the calculated horizontal displacement were evaluated.
The earthquake-induced large displacement of slope containing a weak layer was calculated by extended Newmark with Sweden method(extended NS method). In the methods,the effects of excess pore water pressure and the change of sliding plane geometry on displacement are rationally evaluated. The details of extended NS method were described. A comparison between extended NS method and extended NJ method was performed on a calculation example. The characteristics of these two methods were described. In addition,the effects of ground water level,internal frication angle and slice width on the calculated horizontal displacement were evaluated.
引文
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[5]DENG J L,TSUTSUMI Y,KAMEYA H,et al.A modified procedure to evaluate earthquake-induced displacement of slopes containing a weak layer[J].Soils and Foundations,2010,50(3):413–420.
[6]DENG J L,KAMEYA H,TSUTSUMI Y,et al.Study on a failed dip slope in 2004 Niigata-Ken Chuetsu earthquake[J].Engineering Geology,2011,123(4):302–314.
[7]Ministry of Land,Infrastructure and Transport.Information on the Chuetsu earthquake[OL]..http://www.mlit.go.jp/kisha/kisha05/05/050113.html/2005.
[2]王秀英,聂高众,王登伟.利用强震记录分析汶川地震诱发滑坡[J].岩石力学与工程学报,2009,28(11):2 369–2 376.(WANG Xiuying,NIE Gaozhong,WANG Dengwei.Analysis of landslide induced by Wenchuan earthquake by strong motion records[J].Chinese Journal of Rock Mechanics and Engineering,2009,28(11):2 369–2 376.(in Chinese))
[3]STAMATOPOULOS C A,MAVROMIHALIS C,SARMA S.Correction for geometry changes during motion of sliding-block seismic displacement[J].Journal of Geotechnical and Geoenvironmental Engineering,2011,137(10):926–938.
[4]JANBU N.Earth pressures and bearing capacity calculations by generalized procedure of slices[C]//Proceedings of the Fourth International Conference on Soil Mechanics and Foundation Engineering.London:[s.n.],1957:207–212.
[5]DENG J L,TSUTSUMI Y,KAMEYA H,et al.A modified procedure to evaluate earthquake-induced displacement of slopes containing a weak layer[J].Soils and Foundations,2010,50(3):413–420.
[6]DENG J L,KAMEYA H,TSUTSUMI Y,et al.Study on a failed dip slope in 2004 Niigata-Ken Chuetsu earthquake[J].Engineering Geology,2011,123(4):302–314.
[7]Ministry of Land,Infrastructure and Transport.Information on the Chuetsu earthquake[OL]..http://www.mlit.go.jp/kisha/kisha05/05/050113.html/2005.
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