陡坡傍山双层行车结构体系静力试验研究  

Static test study on double-deck highway structure by steep mountainous side

作　　者：王超[1] 孙国富[1] 房超 姚宇坤 WANG Chao;SUN Guofu;FANG Chao;YAO Yukun(College of Architectural Engineering,Beijing University of Technology,Beijing 100124,China;Beijing General Municipal Engineering Design&Research Institute Co.,Ltd,Beijing 100082,China)

机构地区：[1]北京工业大学建筑工程学院,北京100124 [2]北京市市政工程设计研究总院有限公司,北京100082

出　　处：《人民长江》2019年第1期170-175,共6页Yangtze River

基　　金：2015年度北京教委科研计划项目(KM201510005017)

摘　　要：针对现有路基结构形式难以保证环境与经济效益俱佳的不足,提出了一种适应于山区陡坡地形的新型"桩-锚-框架"复合双层行车路基结构,并进行了该新型结构的静力模型试验研究。对通过数值手段选取的最优结构形式建立缩尺比例为1∶20试验模型。通过试验,测定了模型在静力荷载作用下,抗滑桩桩顶及边坡位移,分析了结构对边坡的支挡作用;测定了结构各部分的受力及变形情况,分析结构的静力稳定性及破坏形式;测定了预应力锚索作用下,桩后、桩底和基底土压力随荷载的变化情况及分布规律。试验结果表明,新型"桩-锚-框架"复合双层行车路基结构具有稳定性好、变形小、结构承载力高等优点。For poor environmental and economic benefits of existing subgrade structure,a new type of pile-anchor-frame composite double-deck highway structure adapted to the steep slope topography in mountainous area is put forward and the static model test of the new composite subgrade structure is carried out.The model of 1:20 scale is established for the designed optimal structure by numerical simulation.Through the test,the displacement of the top of the anti-slide pile and the slope under the static load is determined and the slope supporting effect of the structure is analyzed.The force and deformation of every structure parts are measured,and the static stability and failure modes of the structure are analyzed.The variation and distribution of earth pressure in rear area of pile,pile bottom and basement under the action of pre-stressed anchor cable are measured.The experimental results show that the new pile-anchor-frame composite double-deck highway structure has good stability,small deformation and high bearing capacity.

关 键 词：复合路基结构 静力特性 桩-锚-框架结构体系 山区公路 

分 类 号：TU412[建筑科学—岩土工程]