路堑高边坡锚索格梁支护体系受力特征及设计方法研究  

Research on Mechanical Characteristics and Design Method of Anchor Cable Girder Support System on High Cut Slope

作　　者：苏红军 姜早龙[2,3] 陈大川 李荷[2] SU Hongjun;JIANG Zaolong;CHEN Dachuan;LI He(CCCC Third Highway Engineering Co.,Ltd.,Beijing 100102,China;School of Civil Engineering,Hunan University,Changsha,Hunan 410082,China;Hunan Huda Construction Supervision Co.,Ltd.,Changsha,Hunan 410082,China)

机构地区：[1]中交第三公路工程局,北京100102 [2]湖南大学土木工程学院,湖南长沙410082 [3]湖南湖大建设监理有限公司,湖南长沙410082

出　　处：《施工技术》2021年第10期72-76,共5页Construction Technology

基　　金：国家自然科学基金(50778067);国家重点研发计划(2016YFC0701308)。

摘　　要：以湖南省某高速公路路堑高边坡工程为依托,建立边坡支护模型,研究锚索间距、锚固角度、锚固长度等设计参数对锚索格梁支护体系受力特征及边坡稳定性的影响规律,并根据模拟分析结果,提出最优支护设计方案。研究表明:锚索间距对边坡稳定性影响较大,锚固角度、锚固长度对边坡稳定性影响较小;锚索间距、锚固角度的改变对混凝土格梁受力特征有显著影响;锚固长度改变对锚索的受力特征有显著影响。经数值模拟分析后采用最优锚索设计参数,可有效提高边坡安全系数,保证支护效果。Relying on the high slope engineering of a highway in Hunan Province, a slope support model was established, and the influence of design parameters such as anchor cable spacing, anchoring angle, and anchoring section length on the force characteristics of the anchor cable lattice beam support system and the slope stability was studied. According to the results of simulation analysis, the optimal support design plan is proposed. Studies show that the distance between anchor cables has a greater influence on the stability of the slope, while the anchoring angle and anchoring length have little influence on the stability of the slope;the change in the distance between anchor cables and the anchoring angle has a significant influence on the stress characteristics of the concrete lattice beam;the change of anchoring length has a significant impact on the force characteristics of the anchor cable;the optimal anchor cable design parameters obtained by numerical simulation analysis can effectively improve the safety factor of the slope and ensure the support effect.

关 键 词：边坡工程 支护 锚索格梁 稳定性 数值模拟 

分 类 号：TU43[建筑科学—岩土工程]