【摘要】 为探讨地震作用下斜坡堆积体的加固破坏机理,基于拟静力法理论,采用土工离心模型试验技术和数值模拟方法,对采用抗滑桩、抗滑桩联合锚杆框架2种加固措施进行了对比分析.试验研究表明:坡脚只采用抗滑桩加固时,可能发生越顶坍塌的破坏模式;采用锚杆框架和抗滑桩联合加固,能够改善坡体内部的应力、应变分布规律,大大减小地震作用下坡面变形和抗滑桩受力.在此基础上提出:在高烈度地震区,对斜坡堆积体的工程设计应强调"固脚强腰"的防治原则.更多还原

【Abstract】 Based on the pseudo-static method,the reinforcement measures of anti-slide piles and their combination with anchor bolt frames were investigated with centrifuge model tests and numerical simulation in order to probe into the failure mechanism of deposit-on-slope reinforcement under an earthquake.The experimental results show that overtopping collapse possibly occurs when only anti-slide piles are used to reinforce the bottom of deposit-on-slope.Anti-slide piles combining with anchor bolt frames can improve the distributions of stresses and strains in deposit-on-slope,and decrease its deformation and force acting on anti-slide piles greatly.Based on the above results,it is suggested that the principle of "slope bottom reinforcement and mountainside strengthening" should be emphasized in the design of deposit-onslope in high earthquake intensity regions.更多还原