框架式抗滑桩的模型试验研究  

Model tests of framed anti-sliding piles

作　　者：钱同辉[1,2] 唐辉明[1,2] 夏文才[2] 张石磊[2] 

机构地区：[1]中国地质大学教育部长江三峡库区地质灾害研究中心,湖北武汉430074 [2]中国地质大学工程学院,湖北武汉430074

出　　处：《华中科技大学学报（自然科学版）》2011年第12期119-122,共4页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：教育部长江三峡库区地质灾害研究中心开放基金资助项目(TGRC201015)

摘　　要：通过室内物理模型试验研究框架式抗滑桩的受力特性及变形规律.运用相似理论,充分考虑几何相似、材料特性相似、荷载相似、载荷施加和边界条件相似并建立了试验相似关系,设计了框架式抗滑桩试验模型和试验装置.通过模型试验观察框架式抗滑桩从受荷到破坏的全过程,根据监测数据的动态变化分析框架式抗滑桩内力分布规律、土压力分布规律以及桩顶位移特征.试验结果表明:当滑坡推力达到一定值时,整个框架式抗滑桩与桩间土体组成一个受空间协同交互作用的框架整体,具有很好的等效连拱支挡作用和较好的刚度及稳定性,能有效抑制滑体的下滑位移,抗滑效果显著.To study the stress variation and deformation law of the frame anti-slide piles,an indoor physical model test was completed.The similarities of geometry,material properties,loads,loading and boundary conditions were introduced into the model based on the similarity theory.A set of test equipments for frame anti-slide piles was designed.The internal forces distribution of the frame anti-slide piles,the distribution of earth pressure,and the displacement characteristics on the top of pile were studied through monitoring the whole process from loading to damage.The experimental results indicate that the frame anti-slide piles and the soil between piles will be composed as a spatial frame infrastructure when the landslide thrust reaches to a certain value.This means that the frame anti-slide piles have a good arch equivalent retain effect and can inhibit the landslide decline efficiently.

关 键 词：框架式抗滑桩 模型试验 协同作用 土压力 桩身内力 相似原理 

分 类 号：TU359[建筑科学—结构工程]