摘要
由于黄土自身的特殊性,黄土边坡稳定性分析较一般边坡更为复杂。利用有限元极限平衡法,从坡体形态(坡高、坡比、坡顶坡比)出发,分析其对裂缝深度、裂缝最易产生位置、坡体安全系数的影响。当坡体上部水平,坡比一定时,随着坡高的增加,坡体的坡肩裂缝深度均逐渐增加,坡肩宽度越小,坡体安全系数减小;坡高一定时,坡比越大,坡肩裂缝深度越小,坡肩宽度越小,坡体安全系数越小。当坡体上部倾斜,坡高一定时,坡体上部越缓,坡肩裂缝深度越小,坡肩裂缝的最易开裂位置越靠近坡背,坡体安全系数越大;坡体上部坡比一定时,坡体越高,坡肩裂缝深度越大,坡肩裂缝的最易开裂位置距坡缘的距离越远,坡体安全系数越小。
The stability analysis of the loess slope is more complex than that of the general slope because of the particularity of loess itself. The influences of slope shape（ slope height,slope ratio,and top slope ratio） on the depth of cracks,the location of easy cracks and the safety factor of slope are analyzed based on the finite element equilibrium method. When the upper slope is horizontal and the slope ratio is fixed,the depth of slope shoulder crack increases gradually with the increase of slope height,the smaller the width of slope shoulder is,the smaller the safety factor of slope is. When the slope height is fixed,the higher the slope ratio is,the smaller the depth of slope shoulder crack is,and the smaller the width of slope shoulder,the smaller the safety factor is. When the upper slope is inclined and the slope height is fixed,the gentler the upper slope is,the smaller the slope shoulder crack depth is,and the slope shoulder crack position is more likely close to the slope back,and the bigger the slope safety factor is. When the upper slope ratio is fixed,the higher the slope is,the greater the slope shoulder crack depth is,the further the easy crack position is from the slope margin,and the smaller the slope safety factor is.
作者
刘绪洋
Liu Xuyang(China Construction Tunnel Construction Co.,Ltd.Chongqing 40007)
出处
《工程建设》
2018年第8期49-53,共5页
Engineering Construction
关键词
黄土边坡
边坡稳定性
有限元分析
极限平衡法
坡体形态
安全系数
losses slope
slope stability
finite element analysis
limit equilibrium method
slope shape
safety factor
