渠道膨胀土边坡换填处理土稳定计算分析

Stability Calculation and Analysis on Soil Protection Layer of Expansive Soil Slope

采用力平衡法对膨胀土渠道换填处理土进行边坡稳定分析。不同的坡比、换填形式、地下水位时,换填层抗滑稳定计算结果表明:随着地下水位的升高,换填层的稳定安全系数呈降低趋势;换填形式对抗滑稳定性也有影响,换填量相同时,坡脚加厚处理形式与等厚换填处理形式相比,抗滑稳定安全系数增大;同边界条件、换填形式下,边坡越缓安全系数越大;改进施工方法、增强结合面的紧密程度,可提高边坡的抗滑稳定性。

The force balance method was used for the slope stability analysis on replacement treated soil of expansive soil channel. In the conditions of different ratios of slope, replacement forms and underground water levels, the anti-sliding stability calculation shows that： the stability against sliding of replacement layer is reduced gradually with the rise of underground water level; the replacement form has certain influence on the antisliding stability of replacement layer, the anti-sliding stability increases when toe form is used compared with uniform thickness replacement form raider the same replacement quantity ; the anti-sliding safety coeffieients are bigger when the ratios of slope are more gentle under the same boundary conditions and replacement forms ; the anti-sliding stability can be increased by improving the construction methods and adding the tightness of interlace.