框架预应力锚杆分级支护边坡的数值模拟研究  

Research on Numerical Simulation of the Grading Supported Slope with Frame Prestressed Anchor Bars

作　　者：周勇[1,2] 张鹤[1,2] 方嗣茂[3] 

机构地区：[1]兰州理工大学甘肃省土木工程防灾减灾重点实验室,甘肃兰州730050 [2]西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050 [3]兰州军区空军后勤部,甘肃兰州730020

出　　处：《建筑科学》2013年第5期11-14,19,共5页Building Science

基　　金：甘肃省自然科学基金(No.1208RJZA158);兰州理工大学红柳青年教师培养计划资助项目(No.Q201108);兰州理工大学博士科研基金项目(No.BS04200902);国家科技支撑计划项目(No.2011BAK12B07)

摘　　要：引入FLAC-3D程序及强度折减方法,应用数值模拟技术对某算例多级边坡在加固前后的稳定性进行了计算与分析。对比分析了边坡加固前后的安全系数变化规律、位移变化情况以及锚杆轴力的分布规律。计算结果表明:边坡分级支护后,坡体的水平位移和竖向沉降得到有效的控制,同时也得出了预应力锚杆轴力的分布规律,边坡稳定安全系数明显提高。为分级支护结构的参数设计提供一定的理论参考。Based on FLAC-3D（Fast Lagrangian Analysis of Continua） and strength reduction method, the analysis of slope stability was carried out for both unsupported and supported multi-stage slopes with the numerical simulation technology. The contrast analysis of the safety factor was also done between unreinforced and reinforced slopes. The displacement change of the slope and the distribution law of anchor axial forces are obtained. The results show that horizontal displacement and vertical displacement of the soil are controlled effectively. The distribution law of anchor axial forces was also studied, and the safety factor of the soil was improved significantly due to the reinforcement. The conclusions cab provided valuable reference for the parameters design of the grading support structure.

关 键 词：边坡分级支护 框架预应力锚杆 稳定性分析 FLAC-3D 数值模拟 

分 类 号：TU470.3[建筑科学—结构工程] TU472.34[建筑科学—土工工程]