【作者】 朱彦鹏； 杨校辉； 马孝瑞； 朱桥川；

【Author】 ZHU Yan-peng;YANG Xiao-hui;MA Xiao-rui;ZHU Qiao-chuan;School of Civil Engineering, Lanzhou University of Technology;Northwest Center for Disaster Mitigation in Civil Engineering,Ministry of Education;Xi’an Changqing technology Engineering Co. Ltd.;

【机构】 兰州理工大学土木工程学院； 西部土木工程防灾减灾教育部工程研究中心； 西安长庆科技工程有限责任公司；

【摘要】 地震区重力式挡土墙地震后多数出现不稳定的现象,采用框架预应力锚杆柔性加固技术对失稳重力式挡土墙进行加固是一种非常有效的加固方法,但是,由于加固方法为本文作者首先提出并在工程中使用,则其稳定性分析方法,特别是地震动力稳定分析方法是迫切需要解决的问题,本文以极限平衡理论为基础,对柔性加固后重力式挡土墙进行整体静力稳定性分析,推导出挡土墙的抗滑移稳定性和抗倾覆稳定性计算公式。通过分析给出了地震动力计算模型,分析了地震动力作用,采用振型分解法给出了地震动力作用下地震作用力和锚杆拉力计算公式,并采用极限平衡法给出动力稳定性计算公式。更多还原

【Abstract】 Most of gravity retaining walls in the earthquake zone emerge instability phenomenon after earthquakes. Framework anchor with flexible prestress has been used effectively to reinforce gravity retaining walls, which was proposed first in the author’s previous papers and applied in many practical engineerings. However, the Stability Analysis Method of flexible prestress, especially on the condition of seismic dynamic, is urgent to be researched. On the basis of limit equilibrium theory, the overall static stability of gravity retaining wall was analyzed after flexible reinforcement, and the solution formulas of safety coefficient of both anti-slip and anti-overturning stabilities were derived. The calculation model of seismic dynamic was proposed and its effect was analyzed based on energy analysis method. Meanwhile, the solution formulas of seismic force and anchor axis force were given under seismic dynamic. The dynamic formula of stability was also derived by limit equilibrium theory.更多还原