摘要
路堑高边坡对市政道路存在一定的安全隐患,为了研究坡率、锚杆间距、锚固角度、锚杆支护位置等设计参数对边坡变形及稳定性的影响规律,采用GeoStudio软件进行有限元分析,并根据模拟分析结果,提出优化支护方案。研究表明:边坡坡率、锚杆间距和支护位置对边坡稳定性影响较大,锚固角度影响较小。坡率越大稳定性越小,设计坡率须结合现场实际情况取值;当锚杆间距为2.0m~2.5m时边坡处于稳定状态;锚杆的最佳锚固角度是15°;锚杆支护位置对边坡稳定性影响由大到小是第二级坡>第一级坡>第三级坡,设计依此对锚杆参数进行差别设计。经各项监测结果验证:锚杆支护方案锚固效果显著,边坡在施工及运营阶段均处于稳定状态,高铁桥墩和高压电塔未见明显位移,设计方案合理可靠。
High cutting slope has certain security risks in municipal roads.In order to analyze the impacts of slope rate,bolt spacing,anchor angle,bolt support position and other design parameters on slope deformation and stability,GeoStudio is used for finite element analysis.According to the results of simulation analysis,the optimal support design plan is proposed.Results show that slope ratio,the distance between anchor cables and anchoring support position have huge impacts on slope stability compare to anchoring angle which has little influence.The larger the slope rate is,the smaller the stability is.Design slope rate should be combined with the actual situation on site.While the distance between anchor cables is 2.0 m~2.5 m,the slope is in a stable state.The optimum anchoring angle is 15°,the influence of anchoring support position on slope stability is the second stage slop>the first stage slop>the third stage slop.According to the results,the design parameters are designed differently.The monitoring results confirmed that the anchor support scheme has significant anchoring effect,the slope is in a stable state in the construction and operation stage,and the high-speed railway bridge pier and high-voltage tower have no obvious displacement.It is shown in practice that the design scheme is stable and feasible.
作者
陈志仙
王志人
CHEN Zhixian;WANG Zhiren(Shenzhen Municipal Design&Research Institute Co.,Ltd.,Shenzhen,Guangdong 518029,China)
出处
《水利与建筑工程学报》
2022年第4期220-226,共7页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金项目(51878391)
深圳市科技研发资金项目(深科技创新[2019]33号,20180508151728414)。
关键词
路堑高边坡
锚杆支护
稳定性
优化设计
监测分析
high cutting slope
anchor support
stability
optimal design
monitoring analysis
