土钉墙地震动力分析及抗震设计方法  

Seismic Analysis and Design Method for Soil Nailing Retaining Wall

作　　者：董建华[1,2] 马巍[1] 朱彦鹏[2] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所,甘肃兰州730000 [2]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《中国公路学报》2013年第2期34-41,共8页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(50978129;51108221;51268037);兰州理工大学科研发展基金项目(BS04200901);甘肃省高校基本科研业务费专项资金项目(1204ZTC058);甘肃省自然科学基金项目(1014RJZA016);教育部高等学校博士学科点专项科研基金项目(20116201120002)

摘　　要：为了深入了解地震作用下土钉墙动力特性,并为其提供实用的动力分析方法,基于动力Win-kler地基模型,建立了考虑面板、坡后土体及土钉协同工作的土钉墙动力分析模型,并进行了求解。该模型将面板处理为弹性地基梁,将土钉处理为一个弹簧和阻尼来替代。基于建立的计算模型和震害模式给出了其抗震设计方法,并结合具体工程实例进行了地震作用动力分析及抗震设计,最后与动力离心试验进行了验证。结果表明:土钉墙延性大,具有良好的抗震性能;土钉的峰值轴力连线与静力作用下相似;提出的分析方法对土质较均匀的边坡是可行的,为土钉墙的地震分析及抗震设计提供了一种新的途径。In order to deeply investigate the dynamic characteristics of soil nailing retaining wall under earthquake and provide practical dynamic analysis method, based on dynamic Winkler foundation theory, considering that the facing, the soil behind slope and the soil nailing work together, the dynamic analysis model for soil nailing retaining wall was established and the analytical solutions were obtained. The facing was treated as elastic foundation beam in this model. The influence of the soil nailing was simplified as linear spring and damped system. Seismic design methods were given based on proposed calculation model. The seismic response of engineering example was analyzed using the proposed method. And the proposed method was verified with centrifugal test. The results show that the soil nailing retaining wall has good anti- seismic performance and the peak value of soil nailing axial force and static attachment are the same. The proposed method for analysis is feasible for the slopes with relatively uniform soil. The analysis model provides a new way for seismic analysis and seismic design of the soil nailing retaining wall.

关 键 词：道路工程 土钉墙 动力分析模型 边坡 地震作用 弹性地基梁 

分 类 号：U416.14[交通运输工程—道路与铁道工程]