摘要
研究目的:随着国内高速公路、铁路及民航等工程建设步伐的不断加快,在我国西部高烈度地震区出现了很多推力巨大的工程滑坡,往往具有多层、多级的显著特征,双排抗滑桩是治理该类大型滑坡的有效措施。结合青海玉树机场路滑坡、四川攀枝花机场滑坡等典型实例,采用大型振动台模型试验,分X、Z和XZ三类加载工况研究双排抗滑桩治理大型多滑动面滑坡的动力响应和坡体变形破坏特征。研究结论:(1)试验表明双排桩治理大型多滑动面滑坡的效果明显,体现了"大震不倒"的设计理念;(2)试验过程中,坡体整体变形以拉剪破坏为主,坡体后部平台以震陷为主,滑体分层前倾,接触面效应明显,滑面逐步向深层发展,模型箱两侧加持作用显著;(3)测试数据分析表明,前、后排桩荷载分担不均,后排桩承担大部分滑坡推力(主要来源于深层滑体的滑坡推力),前排桩承担滑坡推力比例较小;(4)本项研究对双排桩的动力学性能分析有着理论和实际意义。
Research purposes： As the accelerating pace of construction of domestic highway, railway and civil aviation, there has been many great propulsion engineering landslides in the high intensity seismic region of western China, which always had Characteristics of muhilayer and multilevel significantly. Double - row anti - slide pile was the effective measures to control the large landslide. Combined with the typical engineering examples such as Yushu airport road landslide in Qinghai Province and Panzhihua airport landslide in Sichuan Province, double - row anti - slide pile is studied how to govern the large sliding surface landslide by the large - scale shaking table model test in X, Z and XZ direction three kinds of load conditions, the characteristics of dynamic response of double - row anti - slide pile and deformation ＆ destruction of landslide were analyzed. Research conclusions： （ 1 ） Double - row pile tests showed that the effect of governance with double - row pile on large - scale muhilayer sliding surfaces is obvious, which reflected very well the design concept of ＂ no collapsing with strong earthquake＂. （2） During the trial, the overall deformation mode of slope is mainly tensile - shear failure, the platform at the back of slope is given priority to seismic subsidence, the sliding body is layered and forward, and the interface effect is obvious, sliding surface gradually developed to deep, clamping effect was significant on both sides of the model box. （3） Test data analysis showed that thrust allocation proportion row piles bore most of the landslide thrust （ mainly came from of two rows anti - slide piles was not uniform, the back landslide thrust of the deep sliding body） , and landslide thrust ratio was smaller in the front row piles. （4）The dynamic performance analysis of the doublerow pile.
出处
《铁道工程学报》
EI
北大核心
2015年第11期30-36,共7页
Journal of Railway Engineering Society
基金
甘肃省自然科学基金项目(145RJZA068)
青海省交通建设科研项目(2010-03)
中国中铁股份公司科技研究开发计划(2011-引导-60)
关键词
双排抗滑桩
多滑动面滑坡
振动台试验
滑坡推力
double - row anti - slide pile
multilayer study has very important theoretical and practical significance for sliding surfaces landslide
shaking table test
landslide thrust
