河岸土坡破坏机制及稳定性分析
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摘要
通过调查发现,天生桥河西侧土坡发生了较大的变形,有发生滑动的可能,该边坡的破坏主要发生在岩体上部的土层中。根据原状土的剪切试验结果,计算得边坡稳定性系数较高,能满足安全性要求。稳定性分析结果表明,该边坡的破坏首先发生在下部的黏性土中的圆弧型破坏,下部失稳后导致上部土体失去侧向支撑而发生变形,最终导致整体性滑动。
Through investigation,it was found that the soil slope on the west side of the Tianshengqiao River had undergone large deformation and there was a possibility of sliding. The damage of the slope mainly occurred in the soil layer in the upper part of the rock mass. According to the shear test results of undisturbed soil,the calculated slope stability coefficient was high,which could meet the safety requirements. The results of stability analysis showed that the failure of the slope first occurred in the arc damage of the cohesive soil at the bottom,and then the failure at the bottom lead to the deformation of the upper soil due to the loss of lateral support,and finally lead to the overall sliding.
Through investigation,it was found that the soil slope on the west side of the Tianshengqiao River had undergone large deformation and there was a possibility of sliding. The damage of the slope mainly occurred in the soil layer in the upper part of the rock mass. According to the shear test results of undisturbed soil,the calculated slope stability coefficient was high,which could meet the safety requirements. The results of stability analysis showed that the failure of the slope first occurred in the arc damage of the cohesive soil at the bottom,and then the failure at the bottom lead to the deformation of the upper soil due to the loss of lateral support,and finally lead to the overall sliding.
引文
[1]邓东平,李亮,赵炼恒.河岸边坡稳定性及张裂缝最不利位置研究[J].中南大学学报:自然科学版,2013,44(9):3873-3883.
[2]马崇武,刘忠玉,苗天德,等.江河水位升降对堤岸边坡稳定性的影响[J].兰州大学学报:自然科学版,2000,36(3):56-60.
[3]朱朋,卢书强,薛聪聪,等.库水位升降与降雨条件下滑坡的渗流及稳定性分析[J].长江科学院院报,2015,32(11):87-92.
[4]王曙光,李亮,赵炼恒,等.折线河岸边坡稳定性的研究[J].长江科学院院报,2012,29(2):30-36.
[5]马建全,王念秦,张新社.基于点稳定系数法的斜坡稳定性分析[J].吉林大学学报:地球科学版,2015,45(2):533-540.
[6]张均锋,孟祥跃,朱而千.水位变化引起分层边坡滑坡的实验研究[J].岩石力学与工程学报,2004,23(16):2676-2680.
[2]马崇武,刘忠玉,苗天德,等.江河水位升降对堤岸边坡稳定性的影响[J].兰州大学学报:自然科学版,2000,36(3):56-60.
[3]朱朋,卢书强,薛聪聪,等.库水位升降与降雨条件下滑坡的渗流及稳定性分析[J].长江科学院院报,2015,32(11):87-92.
[4]王曙光,李亮,赵炼恒,等.折线河岸边坡稳定性的研究[J].长江科学院院报,2012,29(2):30-36.
[5]马建全,王念秦,张新社.基于点稳定系数法的斜坡稳定性分析[J].吉林大学学报:地球科学版,2015,45(2):533-540.
[6]张均锋,孟祥跃,朱而千.水位变化引起分层边坡滑坡的实验研究[J].岩石力学与工程学报,2004,23(16):2676-2680.