地震作用下基坑复合土钉支护动力响应参数分析  

Parametric Analysis on Dynamic Response of Composite Soil Nailing Wall Under Earthquake

作　　者：张宗领 徐萌萌 ZHANG Zongling;XU Mengmeng(College of Architecture and Civil Engineering,Xinyang Normal University,Xinyang 464000,China)

机构地区：[1]信阳师范学院建筑与土木工程学院,河南信阳464000

出　　处：《信阳师范学院学报（自然科学版）》2020年第2期333-338,共6页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(U1504505);河南省高等学校重点科研项目(16A560007);河南省大学生创新创业训练计划项目(201910477024)。

摘　　要：为了研究地震作用下土钉+水泥土搅拌桩复合土钉墙在不同支护参数下的动力响应,利用大型有限元软件ADINA,对某基坑土钉+水泥土搅拌桩复合土钉墙建立了局部三维有限元模型,研究了土钉倾角、土钉长度、土钉水平间距、搅拌桩嵌入深度对边坡的位移响应、加速度响应、轴力响应的影响.结果表明:地震作用下,开挖面的水平位移峰值、水平加速度峰值、土钉轴力峰值随土钉倾角的增大而增大,随土钉水平间距的增大而增大,随土钉长度的增加而减小;增大搅拌桩嵌入深度开挖面水平位移峰值减小,但水平加速度峰值、土钉轴力峰值的减小并不明显.In order to study dynamic response of composite soil nailing wall of soil nailing and cement-soil piles with different parameters under earthquake,a local three-dimensional finite element calculation model was established by using large-scale finite element software ADNIA.The object of study includes the influence of the soil nailing inclination,the soil nailing length,the soil nailing horizontal space and inserting depth of the cement-soil piles upon the displacement response,acceleration response,soil nailing axial force response of the slope.The calculation results show that the slope peak horizontal displacement,slope peak horizontal acceleration and soil nailing axial force will increase with the soil nailing inclination or soil nailing space increases,but decrease as the soil nailing length increases.As the inserting depth of the cement-soil piles increases,the slope peak displacement will decrease.The effect of inserting depth on the peak acceleration and soil nailing axial force is not obvious.

关 键 词：地震作用 复合土钉支护 局部三维有限元 参数分析 

分 类 号：TU457[建筑科学—岩土工程]