土钉边坡支护结构动力计算方法研究  

Dynamic calculation method for soil nailing supporting structure

作　　者：董建华[1] 朱彦鹏[1] 

机构地区：[1]兰州理工大学土木工程学院,兰州730050

出　　处：《振动与冲击》2011年第2期217-221,共5页Journal of Vibration and Shock

基　　金：国家自然科学基金资助项目(50978129);甘肃省自然基金(1014RJZA016);甘肃省科技厅攻关项目(2GS064-A52-040);兰州理工大学科研发展基金(SB04200901)

摘　　要：基于均匀土层的剪切梁理论,得到了边坡在水平地震作用下的动力响应。根据土钉本身质量很小,将土钉受到的惯性力忽略。其在压力注浆后形成"狼牙棒"与周围土体一起运动,运动受周围土体控制,其破坏取决于土钉所能承受的变形大小,而并非惯性力,因此将土钉简化为一维无质量的弹性杆,通过变形协调和虎克定律得到了土钉轴力地震响应。将提出的计算方法应用于一个工程案例,进行了地震动力分析与抗震验算。为了验证提出的计算方法的合理性,通过ADINA软件进行了对比分析,结果表明这种计算方法对土质较均匀的边坡动力抗震设计和分析是安全、可靠、合理的。这种计算方法给土钉支护结构的地震分析及抗震设计提供了理论依据。Based on shear beam theory,seismic response of a slope was obtained under condition of horizontal earthquake excitation.Because mass of soil nailing was smaller compared to that of soil,its inertia force could be ignored.The movements both of soil nailing and soil where nearly in phase and the damage of a soil nailing depended on the size of its deformation not its inertia force,so the soil nailing was simplified as a one-dimension elastic rod without mass.The seismic response of the soil nailing was derived using compatibility of deformation and Hooke＇s law.The method was applied to a practical case to conduct seismic analysis and design.Using finite element software（ADINA） to verify the proposed method,the results showed that its design and the analysis are safe and reliable.The calculation method provided a theoretical basis for earthquake analysis and a seismic design of a soil nailing supporting structure.

关 键 词：土钉支护结构 边坡 变形协调 地震响应 抗震设计 

分 类 号：TU476[建筑科学—结构工程]