基于改进后的坡体地下水压分布假设,采用极限平衡理论,推导了坡顶荷载、地震荷载、锚固荷载、临坡河流水压、坡体地下水压和坡趾淘蚀作用下I临河岩石边坡滑移稳定系数的表达式,绘制了滑移稳定系数与各个影响因素之间的关系图。分析表明:改进后的水压分布假设是合理的;水的作用是影响边坡抗滑稳定性的重要因素,临河水位升高、地下水位降低对提高边坡抗滑稳定性有积极作用;滑面出流缝堵塞与否对边坡抗滑稳定性的影响较为显著,一般情况下,出流缝堵塞对临河岩石边坡抗滑稳定性不利,只有当Hr〉Hw时,出流缝堵塞时边坡滑移系数才大于未堵塞时边坡滑移稳定系数。
Based on the assumption of improved distribution of groundwater pressure under slope body, using the limit equilibrium theory, the factor expressions for anti-slide stability of rock slope along river under the condition of different influencing factors, such as slope-top load, seismic load, anchorage load, river pressure on slope surface, groundwater pressure and toe erosion effect, are derived. The relation curves of the anti-shide stability factor with the influencing factors a drawn. The results show that (1) the new assumption which improved the water pressure distribution is reasonable; (2) water pressure is an important influencing factor to the slope anti-slide stability, the higher river water level and the lower groundwater level are beneficial to improve the slope anti-slide stability; (3) whether the outflow joint is blocked has significant effect on the slope stability against sliding, the outflow joint blocking has adverse effect on anti -slide stability of the rock slope along the river in general case, the anti -slide stability factor as the outflow joint blocked is larger than that as the outflow joint unblocked only when Hr 〉 Hw.