Distribution of land-slide thrust on anti-slide piles
Distribution of land-slide thrust on anti-slide piles
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发表时间：
2006
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通讯作者：
Feng Jun
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作者：
Feng Jun
在已有的工程项目中，根据滑体的岩石特性，可以近似确定抗滑桩上的滑坡推力分布为三角形、矩形或梯形。提出了一种新的计算方法，改进了按质量通过指定剪切开度的稳定性计算分布的方法。假设潜在滑动面由原滑动面的一部分和经过指定剪切开度的圆形表面组成。首先，计算了势面上质量的稳定性，确定了指定剪切开度的最小安全系数；若该安全系数小于设计值，则采用Janbu法计算相应滑面滑坡推力。在桩上按一定的间隔从上到下指定剪孔。利用该方法可以计算出桩基上多个点的滑坡推力。通过比较相邻剪切孔的滑坡推力，可以得到相邻剪切孔之间断面的滑坡推力增量。由此可以确定滑坡推力在桩上自上而下的分布。
In the existing engineering projects,the distribution of landslide thrust on anti-slide piles is approximately determined to be triangular,rectangular,or frapezoid based on rock characters of the sliding mass.A new method was proposed to improve the calculation of distribution according to stability of the mass sliding through a specified shear opening.It was assumed that the potential slide surface was composed of a part of the original slide surface and a circular surface through the specified shear opening.Firstly,the stability of mass above the potential surfaces was calculated and the minimum safety coefficient of the specified shear opening was determined.If this safety coefficient was less than the design value,then the landslide thrust of the corresponding slide surface was calculated by Janbu Method.The shear openings were specified at the pile from top to bottom with a certain interval.By this method,the landslide thrust at many points of the pile could be calculated.The increment of landslide thrust of the section between two neighboring shear openings could be obtained by comparing the landslide thrust of neighboring shear openings.So,the distribution of landslide thrust on the pile from top to bottom could be determined.