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为了准确评价库岸公路岩石边坡的稳定性,合理指导工程施工,保证开挖边坡安全,考虑发生连续降雨、洪水等引起库水位抬高后,库岸公路岩石边坡滑动面处于饱水状态时的滑动面渗水压力,建立了渗压效应下岩石边坡的滑动简化模型。然后进行边坡上力的分析推导,得出边坡的坡高、坡角和极限破坏角之间的关系式,并对关系式进行求解,得出库岸公路岩石边坡极限破坏角公式。最后利用该公式对安康至陕川界高速公路沿线典型边坡计算并进行回归分析,得出沿线边坡坡高和坡角之间的关系式和极限破坏角公式。计算结果与实际相符。
In order to accurately evaluate the stability of the bank slope of rocky bank road, guide the construction reasonably and ensure the safety of excavation slope, taking into account the occurrence of continuous rainfall, flooding and other causes of reservoir water level elevation, State sliding surface seepage pressure to establish a seepage pressure effect of rock slope sliding simplified model. Then, the force on the slope is analyzed and deduced, and the relationship between slope height, slope angle and ultimate failure angle is obtained. The formula of the ultimate failure angle of the bank slope is obtained. Finally, by using this formula, the typical slope along Ankang-Shanchuanjie Expressway is calculated and regressed, and the formulas of slope height and slope angle along the slope are obtained. The calculation result is in accordance with the actual situation.