【摘要】 基于强度折减技术和岩土塑性极限分析理论,考虑抗滑桩预加固岩土边坡的加固效应,从功能平衡原理探讨了岩土边坡抗滑桩加固位置、桩长和多抗滑桩共同加固边坡的分析方法。假定机动容许的对数螺旋线速度机构,推导了抗滑桩预加固边坡稳定性安全系数的计算表达式。采用内点迭代方法对安全系数目标函数进行能量耗散最小化意义上的优化计算,算例对比验证了方法和程序的正确性。分析了单抗滑桩加固措施条件下的边坡局部稳定性特性,并由此推导了多抗滑桩加固边坡的稳定性分析算式。研究表明,抗滑桩设置位置改变对边坡安全系数、临界滑裂面位置和桩长均有显著影响,抗滑桩加固边坡的最优设置位置应位于边坡中下部区域。更多还原

【Abstract】 Based on strength reduction technique and geotechnical plastic limit analysis theory,an analyfical method about the location of anti-slide pile,anti-slide pile length and stability of slope reinforced by multiple piles is studied in terms of the functional balance principle,in which the pre-reinforcing effect of anti-slide pile is taken into account.Provided that a simple logarithmic spiral failure mechanism and a safety factor expression calculation of the pre-reinforcing slopes with anti-slide piles is derived.Provided that a simple logarithmic spiral failure mechanism,the expression to calculate the safety factor of slope pre-reinforced by anti-slide piles is derived.The iteration interior point method is used to calculates the objective function of safety factor incorporating the theory of minimized energy dissipation.The examples comparison illustrate the validity of this method and program.The local stability of slope reinforced by the single-pile is analyzed;and then the expression to evaluate the stability of slope reinforced by multiple piles is derived.The results show that the location of pile has significant influence on the safety factor,the location of critical slip surface and the pile length.And the best position for re-reinforcing slope with piles should be located in the lower slope region.更多还原