微混凝土抗滑模型桩的地震动力弹性反应试验研究  

Experimental study on dynamic-elastic response of model concrete stabilizing piles during earthquake

作　　者：李荣建[1] 于玉贞[1] 柴霖[1] 李广信[1] 

机构地区：[1]清华大学水沙科学与水利水电工程国家重点实验室,北京100084

出　　处：《水利水电技术》2008年第5期47-50,共4页Water Resources and Hydropower Engineering

基　　金：国家自然科学基金委员会;二滩水电开发有限责任公司雅砻江水电开发联合研究基金重点项目(50639060)

摘　　要：为研究原型钢筋混凝土抗滑桩的加固效果和地震动力反应,采用微混凝土抗滑模型桩制作了高位单排抗滑桩加固边坡模型,进行了动力离心模型试验,测量了地震作用下边坡变形、反应加速度和在较高桩位条件下抗滑桩静动力弯矩等反应规律。结果表明:在地震作用下,微混凝土模型桩在加固边坡模型中有足够的抗弯承载强度,仍处于弹性工作范围内。进一步分析而表明,抗滑桩对周围土体的约束和由此形成的土拱效应使得桩体附近土体的反应加速度略有减小,抗滑桩加固是有效的。In order to evaluate the aseismic effect of reinforced concrete stabilizing pile and the dynamic response in prototype, the dynamic centrifuge model test of soil slope reinforced with one row piles near slope crest was performed by making use of the model concrete piles. The deformation and response acceleration of slope, and the static and dynamic moments of piles were meas- ured. The results show that, the model concrete stabilizing piles have enough bending strength and still in elastic state during earthquake. Furthermore, the restriction on surrounding soil by model concrete piles and the soil arching effect weakened the response acceleration of soil somewhat. Therefore, the stabilizing piles are demonstrated to be effective.

关 键 词：边坡 微混凝土 抗滑桩 动力离心模型试验 地震响应 

分 类 号：TU411.93[建筑科学—岩土工程] TU473.1[建筑科学—土工工程]