模块面板式加筋土路基力学行为试验研究  

Experimental Study on Mechanical Behavior of Modular Panel Type Reinforced Soil Subgrade

作　　者：李东珀 王莉 景宏君 龙坤 LI Dongpo;WANG Li;JING Hongjun;LONG Kun(Yan'an City Highway Administration Bureau,Yan'an,716000,Shaanxi,China;School of Architecture and Civil Engineering,Xi'an University of Science and Technology,Xi'an 710054,China)

机构地区：[1]延安市公路局,陕西延安716000 [2]西安科技大学建筑与土木工程学院,西安710054

出　　处：《路基工程》2023年第3期107-114,共8页Subgrade Engineering

基　　金：国家自然科学基金项目(41672305);陕西省延安公路管理局项目(2017-16k)。

摘　　要：利用加筋土路基室内试验模型,探索模块面板式加筋土路基在顶面局部荷载作用下的受力变形规律。结果显示:侧向和竖向土压力沿格栅布设长度方向均呈中部大、两端小的非线性分布趋势;面板累积侧向位移沿面板高度呈“中央大于首尾”的非线性分布趋势;格栅累积应变在整个填筑-加载过程中经历增加-波动和减小-稳定两个阶段;路基上部附加应力扩散角随外荷载的增加呈先增后减态势;侧向土压力系数沿面板高度分布规律与侧向土压力较为一致。Using the laboratory test model of the reinforced soil subgrade,the stress and deformation law of the modular panel reinforced soil subgrade under the local load on the top surface was explored.The results show that the lateral and vertical earth pressures along the length of the grid are large in the middle and small at the two ends;the cumulative lateral displacement of the panel shows a nonlinear distribution trend of"the center is greater than the head and tail"along the height of the panel;The cumulative strain of the grid went through two stages of increase-fluctuation and decrease-stability during the whole filling-loading process;the additional stress diffusion angle on the upper subgrade increased first and then decreased with the increase of the external load;The distribution law of the lateral earth pressure coefficient along the panel height is more consistent with the lateral earth pressure.

关 键 词：道路工程 土工格栅 加筋土路基 力学行为 模型试验 扩散角 

分 类 号：TU411.93[建筑科学—岩土工程]