THRUST LINE CRITERION IN EMBANKMENT STABILITY ANALYSIS
THRUST LINE CRITERION IN EMBANKMENT STABILITY ANALYSIS
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DOI：
10.1680/geot.1973.23.1.85
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发表时间：
1973-03
期刊：
影响因子：
5.8
通讯作者：
E. Spencer
中科院分区：
文献类型：
--
作者：
E. Spencer
本文提出了一种考虑层间力并满足力和力矩平衡条件的路堤稳定性分析方法。该方法适用于任何形状的有无拉裂纹的滑动面。给出了总应力和反应力推力线位置的表达式。两个系列的问题的解决方案。在第一个系列中，没有拉伸裂纹，但对滑动面的形状作了各种各样的假设，并对层间力的斜率作了不同的假设。然而，这些解决方案中没有一个导致推力线对于连续应力的满意位置。在第二个系列中，假定存在一个受水压作用的拉伸裂纹。结果表明，当拉裂纹深度为零有效反应力深度，且层间力的斜率除滑动面上端有一个减薄外，其余均为常数时，可得到满意的推力线。包含有水压作用的拉伸裂纹并不影响该问题的安全系数值。/TRRL/
A METHOD OF ANALYSING THE STABILITY OF EMBANKMENTS IS DESCRIBED WHICH ACCOUNTS FOR THE INTER-SLICE FORCES AND SATISFIES FORCE AND MOMENT EQUILIBRIUM CONDITIONS. THE METHOD IS APPLICABLE TO ANY SHAPE OF SLIP SURFACE WITH OR WITHOUT A TENSION CRACK. EXPRESSIONS ARE GIVEN FROM WHICH THE POSITIONS OF THE LINES OF THRUST FOR TOTAL AND EFFECTIVE STRESS CAN BE OBTAINED. SOLUTIONS ARE GIVEN TO TWO SERIES OF PROBLEMS. IN THE FIRST SERIES THERE IS NO TENSION CRACK BUT VARIOUS SHAPES ARE ASSUMED FOR THE SHAPE OF THE SLIP SURFACE AND DIFFERENT ASSUMPTIONS MADE REGARDING THE SLOPES OF THE INTER-SLICE FORCES. HOWEVER, NONE OF THESE SOLUTIONS LEADS TO A SATISFACTORY POSITION FOR THE LINE OF THRUST FOR EFFECTIVE STRESS. IN THE SECOND SERIES A TENSION CRACK WITH WATER PRESSURE ACTING IN IT IS ASSUMED PRESENT. IT IS SHOWN THAT A SATISFACTORY THRUST LINE IS OBTAINED WHEN THE DEPTH OF THE TENSION CRACK IS TAKEN TO BE THE DEPTH OF ZERO ACTIVE EFFECTIVE STRESS AND THE SLOPE OF THE INTER-SLICE FORCES IS CONSTANT, EXCEPT FOR A REDUCTION AT THE UPPER END OF THE SLIP SURFACE. THE INCLUSION OF THE TENSION CRACK WITH WATER PRESSURE ACTING IN IT DOES NOT AFFECT THE VALUE OF THE FACTOR OF SAFETY IN THIS PROBLEM. /TRRL/