摘要
采用三维弹塑性有限元分析软件,对预应力锚杆加固的大连石门山高陡边坡工程进行数值模拟,并将数值模拟结果与现场实测进行对比分析,验证了计算模型的可靠性。结合强度折减法,研究了边坡在不同锚杆参数条件下的稳定性与变形规律。研究结果表明：随着锚杆预应力的增大,边坡坡面的水平位移和坡顶竖向沉降都逐渐减小,但是当预应力超过界限值后,其边坡位移的影响不太明显;在一定范围内减小锚杆间距能够有效地减小边坡的位移,增加边坡的稳定性;采用分层开挖方式较一坡到底开挖方式,更有利于保证边坡的安全稳定。文中关于锚杆参数对预应力锚固边坡稳定性影响规律研究,可为类似的边坡支护工程提供一定技术参考。
Three-dimensional elasto plastic finite element analysis software is used to simulate the high-steep slope of the Shimen Mountain in Dalian, and the numerical simulation results are compared with the field test to verify the reliability of the model. The stability and deformation of the slope under different bolt parameters are studied by combining the strength reduction method. The results show that the horizontal displacement of the slope and the vertical settlement of the slope are gradually reduced with the increase of the prestressing force of the bolt, but the influence of the slope displacement is less obvious when the prestressing exceeds the limit value; to reduce the bolt spacing within a certain range can effectively reduce the slope of the displacement and increase the stability of the slope; layered excavation method instead of the slope of the excavation in the end can be more conducive to ensuring the safety and stability of the slope. In this paper, the influence of bolt parameters on the stability of prestressed anchorage slope can provide some technical reference for similar slope support project.
作者
王海涛
张小浩
宋词
何永
闫帅
吴跃东
WANG Hai-tao;ZHANG Xiao-hao;SONG Ci;HE Yong;YAN Shuai;WU Yue-dong(School of Civil and Safety Engineering, Dalian Jiaotong University, Dalian 116028, China)
出处
《公路》
北大核心
2018年第4期18-24,共7页
Highway
基金
国家自然科学基金项目,项目编号51208073
辽宁省“百千万人才工程”人才资助项目,项目编号2014921061
辽宁省高等学校优秀人才支持计划资助项目,项目编号LJQ2014049
大连市高层次人才创新支持计划项目,项目编号2015R073
关键词
高陡边坡
预应力锚杆
参数分析
边坡稳定
high and steep slope
prestressed anchor
parameter analysis
slope stability
