地震荷载作用下顺层岩体边坡变形特征分析

›› 2007, Vol. 28 ›› Issue (8): 1557-1576.

地震荷载作用下顺层岩体边坡变形特征分析

肖克强^{1, 2} , 李海波¹，刘亚群¹，夏祥¹，张磊奇³

（1. 中国科学院武汉岩土力学研究所，武汉 430071；2. 广西电力工业勘查设计研究院，南宁 530023； 3.河南省南阳市水利勘测设计院，河南南阳 473063

收稿日期:2006-06-28 出版日期:2007-08-10 发布日期:2013-10-15
作者简介:肖克强，男，1977年生，博士，从事岩土工程研究设计。
基金资助:
国家自然科学基金重点项目（No. 50439030）；国家十一五支撑项目（No. 2006BAB04A06）。

Study on deformation characteristics of bedding slopes under earthquake

XIAO Ke-qiang^{1 2}, LI Hai-bo¹, LIU Ya-qun¹, XIA Xiang¹, ZHANG Lei-qi³

1. Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Guangxi Electric Power Industry Investigation, Design and Research Institute, Nanning 530023, China 3. Nanyang Reconnaissance and Design Institute, Nanyang 473063, China

Received:2006-06-28 Online:2007-08-10 Published:2013-10-15

摘要/Abstract

摘要： 应用二维离散元程序UDEC计算了地震荷载作用下边坡的位移，并将计算结果与Newmark法计算结果及震后现场实测值进行了对比。结果表明，Newmark法计算得到的位移值较实测值偏小，离散元计算得到的位移结果较Newmark法更接近于实测值。在此基础上，初步分析了地震荷载作用下坡高、坡角、岩层倾角等因素对顺层岩体边坡位移的影响规律。由分析结果可知，地震荷载下顺层岩体边坡的位移并不随坡高增加而单调增大，在坡高约100 m时位移达到最大值，坡高超高100 m位移反而有所降低；当坡高超高200 m后，位移随坡高的变化幅度不大，顺层岩体边坡的位移随坡角增加而单调增大。随岩层倾角增加边坡位移明显增大；当岩层倾角大于层面内摩擦角时，随着岩层倾角的增大，边坡变形增长幅度明显增大。

关键词: 地震荷载, 顺层边坡, 位移, UDEC程序, Newmark法

Abstract: The displacements of two selected international landslide cases are calculated by two-dimensional program of UDEC and Newmark method, respectively. Comparison between the calculating results and the field values of earthquake induced displacements shows that the displacements calculated by Newmark method are lower than the field values and the displacements simulated by UDEC are close to the field values. Then, the influences of height and angle of bedding slope and angle of interface on displacement characteristics of bedding slopes under earthquake are analyzed. It is reported that the displacement doesn’t monotonously increase with the increasing of H (height of bedding slope). It reaches max when H is about 100 m and then decreases with the increasing of H. And when H is above 200m, its decreasing rate is small. It is also suggested that the displacement increases with the increasing of the angle of bedding slope. As well, the displacement increases with the increasing of β (angle of interface), and its increasing rate tended to obviously increase with the increasing of β at the condition of β larger than the friction angle of rock joint.

Key words: earthquake, bedding slope, displacement, UDEC, Newmark method

中图分类号:

TU 433

肖克强 , 李海波，刘亚群，夏祥，张磊奇 . 地震荷载作用下顺层岩体边坡变形特征分析[J]. , 2007, 28(8): 1557-1576.

XIAO Ke-qiang , LI Hai-bo , LIU Ya-qun , XIA Xiang , ZHANG Lei-qi . Study on deformation characteristics of bedding slopes under earthquake[J]. , 2007, 28(8): 1557-1576.

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