抗滑桩加固红砂岩风化土路基边坡模型试验  

Slope model experiment of red sandstone weathered soil subgrade reinforced by anti-slide piles

作　　者：景彬余 温树杰[1,2] JING Bin-yu;WEN Shu-jie(School of Architecture and Surveying Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China;Jiangxi Provincial Key Laboratory of Environmental Geotechnical Engineering and Disaster Control,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]江西理工大学土木与测绘工程学院,江西赣州341000 [2]江西理工大学江西省环境岩土与工程灾害控制重点实验室,江西赣州341000

出　　处：《桂林理工大学学报》2022年第1期109-114,共6页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(51304084);江西省自然科学基金项目(20151BAB206026)。

摘　　要：为了分析抗滑桩在红砂岩风化土路基边坡加固过程中桩身前后的土压力分布规律、桩身应变以及桩身弯矩,在满足相似比关系的条件下,建立抗滑桩加固红砂岩风化土路基边坡模型。在抗滑桩桩前和桩后等间距对称布置应变片和土压力盒,通过钢结构反力架逐级施加静态荷载,测得桩前土压力、桩后土压力随埋深以及桩身应变。试验结果表明:桩前土压力随埋深的分布大致呈三角形,桩后土压力的分布为两端小中部大,且同一埋深位置处的桩前土压力明显大于桩后土压力;桩身应变为非线性形变,随埋深大致呈抛物线分布;桩身弯矩初始随埋深的变化不明显,当达到0.4L;(桩受荷段长)后随埋深的增加而增大。In order to analyze the anti-sliding piles during the consolidation of the red sandstone weathered soil roadbed slope,the soil pressure distribution before and after the pile body,the strain of the pile body,and the bending moment of the pile body under the condition of similar relationship,anti-slide pile reinforcement of red sandstone weathered soil subgrade slope model is set up.During the test,the strain gauge and the earth pressure box are symmetrically arranged in the same spacing before and after the anti-slide pile.The static load is applied step by step through the steel structure counterforce frame to measure the soil pressure before and after the pile and the strain of the pile body.The test results show that the distribution of soil pressure before the pile with the burial depth is generally triangular.The distribution of the soil pressure behind the pile is small at both ends and strong at the middle.The soil pressure at the same depth is significantly greater than the soil pressure at the back of the pile.Strain is a non-linear deformation,which is roughly parabolic with the burial depth.The bending moment of the pile body does not change significantly with the burial depth.It increases with the burial depth when it reaches 0.4L;(length of the pile bearing section).

关 键 词：抗滑桩 红砂岩风化土 路基 边坡 模型试验 

分 类 号：TU473.1[建筑科学—结构工程]