坡肩位置及深度对边坡稳定性的影响

Influence of Slope Shoulder Position and Depth on Slope Stability

利用有限元极限平衡法,从坡体形态(坡比、坡高、上部坡体坡比)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逐渐增加,坡体安全系数逐渐减小;坡高一定时,坡比越大,坡肩裂缝深度越小,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;上部坡体坡比一定时,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。

Based on the finite element limit equilibrium method,the influences of slope morphology(slope ratio,slope height,slope ratio of upper slope)on crack depth,the most prone location of the crack and the safety factor of the slope are analyzed.When the upper part of the slope is horizontal and the slope ratio is constant,with the increase of the slope height,the slope shoulder crack depth of the slope gradually increases,and the safety factor of the slope gradually decreases.When the upper part of the slope is inclined and the height of the slope is constant,the slower the upper part of the slope is,the smaller the crack depth of the shoulder is.The closer the crack location of slope shoulder is to the slope back,the greater the safety factor of slope body will be.When the upper slope ratio of the slope is constant,the higher the slope,the greater the crack depth of the shoulder.The farther the crack location of shoulder is from the slope edge,the smaller the safety factor of slope is.