考虑侧向变形影响的黄土路基沉降模型试验研究  

Settlement Analysis of Loess Subgrade Considering Lateral Deformation of Soil

作　　者：朱金环 郭胜男 李哲[2] 刘路路 朱威权 ZHU Jin-huan;GUO Sheng-nan;LI Zhe;LIU Lu-lu;ZHU Wei-quan(School of Civil Engineering,Shangqiu Institute of Technology,Shangqiu 476000,China;Chang'an University,Xi'an 710064,China;Guangxi Road and Bridge Engineering Group Co.Ltd.,Nanning 530200,China;Institute of Geotechnical Engineering,Southeast University,Nanjing 211189,China;Henan Jiudu Anti-corrosion Installation Co.Ltd.,Xinxiang 453000,China)

机构地区：[1]商丘工学院土木工程学院,商丘市476000 [2]长安大学,西安市710000 [3]广西路桥工程集团有限公司,南宁市530200 [4]东南大学岩土工程研究所,南京市211189 [5]河南省九都防腐安装有限公司,新乡市453000

出　　处：《公路》2023年第8期41-47,共7页Highway

基　　金：特殊地区公路工程教育部重点实验室开放基金项目,项目编号300102212510。

摘　　要：受荷土体发生的侧向变形是引起黄土路基产生沉降的原因之一,明确侧向位移条件下黄土路基的沉降变形规律成为其科学合理利用的关键。因此,在明确侧向位移对黄土路基沉降影响的基础上,依据黄土路基土体受力形式,为研究侧向位移对压实黄土路基的影响,通过自行设计加工的一种对土体施加不同约束条件的试验装置,研究了同种压实度的土单元在不同约束条件下的加载压缩试验特性。结果表明:受力控制条件下的压缩试验,土单元抵抗变形的能力随着侧面约束数目的增多而逐渐增强;对于侧向预留一定距离的试样而言,土样的竖向压缩应变和侧面预留距离有很大关系。土单元在不同约束条件下的试验成果说明土体的侧向变形是路基产生沉降的重要因素,为黄土在公路工程中的应用提供了重要依据。The lateral deformation of loaded soil is one of the causes for the settlement of loess subgrade.It is the key to make clear the settlement deformation law of loess subgrade under the condition of lateral displacement.Therefore,on the basis of identifying the influence of lateral displacement on the settlement of loess subgrade,according to the mechanical form of loess subgrade soil,in order to study the influence of lateral displacement on compacted loess subgrade,a test device with different constraints on soil is designed and manufactured,and the loading and compression test characteristics of soil units with the same compactness under different constraints are studied.The results show that the resistance of soil elements to deformation increases with the increase of the number of side constraints in compression tests under stress control.For the test sample with a certain lateral reservation distance,the vertical compression strain of the soil sample is closely related to the lateral reservation distance.It can be seen that the results of soil unit under different constraints show that the lateral deformation of soil is an important factor for the settlement of subgrade,which provides an important basis for its application in highway engineering.

关 键 词：黄土路基 侧向位移 沉降 侧向约束 

分 类 号：U416.1[交通运输工程—道路与铁道工程] U419.4