粉土中不同加固深度有侧限地基试验  

Experimental study on lateral confined subgrade with different reinforcement depths in silt

作　　者：付万清 吴保全 尤鹏飞 董茂森 FU Wanqing;WU Baoquan;YOU Pengfei;DONG Maosen(School of Civil Engineering and Architecture, Henan University, Kaifeng, Henan 475000, China)

机构地区：[1]河南大学土木建筑学院,河南开封475000

出　　处：《中国科技论文》2021年第8期843-848,共6页China Sciencepaper

摘　　要：为探究不同深度有侧限体对地基力学性能的影响,研究应力沿深度方向的传递规律,通过室内模型试验对粉土中5组不同加固深度的有侧限地基进行了相关研究。分析了有侧限体不同深度下,荷载与沉降、地基承载力、轴向应力、有侧限体与地基土应力比的变化情况。试验结果表明:在一定深度范围内,有侧限体深度越深,地基承载力越高,沉降量越小;在相同荷载作用下,有侧限体与地基土的应力比随深度的增加而减小;有侧限体轴向应力沿深度方向递减,在1/4深度处开始明显减小。In order to explore the influence of lateral confined body at different depths on the mechanical properties of subgrade and study the law of stress transmission in depth,five types of lateral confined subgrades with different reinforcement depths in silt soil were studied by indoor model tests.This paper mainly analyzed the changes of load and settlement,subgrade bearing capacity,axial stress,stress ratio of lateral confined body to subgrade soil at different depths.The test results show that within a certain depth range,the deeper the lateral confined body,the higher the bearing capacity of the subgrade and the smaller the settlement is.Under the same load,the stress ratio of lateral confined body to subgrade soil decreases with increasing depth.In addition,the axial stress of lateral confined body decreases in the depth direction,and begins to decrease significantly at 1/4 depth.

关 键 词：有侧限地基 承载力 竖向荷载特性 模型试验 

分 类 号：TU472.99[建筑科学—结构工程]