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.
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 antislide 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-on-slope in high earthquake intensity regions.
出处
《西南交通大学学报》
EI
CSCD
北大核心
2008年第3期335-340,共6页
Journal of Southwest Jiaotong University
基金
国家自然科学基金西部重大研究计划项目(90202007)
西部交通建设科技项目(200731800003)
西藏自治区交通厅资助项目(XZJK2006-1)
关键词
水平地震力
拟静力法
斜坡堆积体
离心模型试验
数值模拟
horizontal seismic force
pseudo-static method
deposit-on-slope
centrifuge model test
numerical simulation
