基于临界滑动场理论的抗滑桩加固边坡稳定分析

Stability analysis of slope reinforced with anti-sliding piles based on critical slip field theory

临界滑动场理论已在边坡稳定、土压力理论、地基承载力等方面得到了应用和发展,但少见在抗滑桩加固边坡方面的应用研究。基于余推力法边坡滑动场理论,从理论基础、计算方法、算例验证3方面对抗滑桩加固边坡的临界滑动场方法进行了系统的分析研究,包括边坡土体的离散方法、复合土体抗剪参数的确定、临界滑动场的搜索、状态点危险滑动方向、最大剩余推力的确定以及最小安全系数的计算。采用经典算例对所提出的方法进行了验证,结果表明,基于临界滑动场理论的抗滑桩加固边坡计算方法是合理的。

The theory of critical slip field has been applied and developed in many fields such as slope stability, earth pressure theory and foundation bearing capacity; however, this theory are less applied in slope reinforcement with anti -sliding piles. Based on the unbalanced thrust of critical slip field theory, the critical slip field theory in slope reinforcement with anti-sliding piles is systematically analyzed from three aspects of basic theory, computing method and example verification, including the dis-crete method of slope body, shear parameters of composite soil, the search of critical slip field, dangerous sliding direction of state point, the determination of maximum residual thrust, as well as the calculation of minimum safety factor. Finally, this spe-cific calculation method is verified with a classic example, it is shown that using critical slip field theory to analyze the slope rein-forcement with anti-sliding piles is reasonable.