框架式双排抗滑桩结构性能研究  

Analysis on the Performance of Double-Row Anti-Slide Frame-Piles

作　　者：钱同辉[1,2] 陈芳[2] 程周炳[2] 丁红星[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,武汉430074 [2]中国地质大学工程学院,武汉430074

出　　处：《长江科学院院报》2011年第11期91-95,共5页Journal of Changjiang River Scientific Research Institute

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

摘　　要：为了解框架式抗滑桩桩土共同作用特征和阻滑能力,采用有限元技术,综合考虑滑体、滑床的物理力学参数及桩土界面参数等对桩土相互作用的影响,并结合长江三峡库区巴东县红石包滑坡治理工程,建立框架式抗滑桩的三维有限元计算模型。通过观察框架式抗滑桩内力和位移的变化规律,研究桩、梁、土相互作用关系。计算结果显示:框架梁与前后双排桩变形协调一致,框架桩与桩间土体位移值基本相同,框架式抗滑桩与桩间土体构成了一个整体刚度较大的空间结构。此结果表明框架式抗滑桩具有等效连拱支挡作用和较大的刚度和稳定性。To study the characteristics of pile-soil interaction and the resistance of frame anti-slide piles,a 3-D finite element model of anti-slide frame-piles was established for Hongshibao landslide control works at Badong County in the Three Gorges Reservoir Area.Impacts on pile-soil interaction exerted by the physical and mechanical parameters of sliding body and sliding bed and the parameters of pile-soil interface were considered during the model establishment.The interaction of pile-beam-soil was investigated through observing the variation characteristics of internal force and displacement of the piles.Simulation results showed that the frame beam coordinated well with the displacement of front and back piles,and the displacement value of frame piles was consistent with that of soil among the piles.A spatial structure of large integral stiffness was thus formed by the piles and the soil among them.The results suggested that anti-slide frame-piles are of large stiffness and stability,and have equivalent support effect to that of multi-arch structure.

关 键 词：框架式抗滑桩 空间协同计算 桩土共同作用 有限元 

分 类 号：TU473.1[建筑科学—结构工程]