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    李哲, 赵金朋, 刘路路, 刘晓燕. 陇东黄土路堤温/湿度场演化特征及不均匀沉降分析[J]. 应用基础与工程科学学报, 2024, 32(5): 1333-1348. DOI: 10.16058/j.issn.1005-0930.2024.05.010
    引用本文: 李哲, 赵金朋, 刘路路, 刘晓燕. 陇东黄土路堤温/湿度场演化特征及不均匀沉降分析[J]. 应用基础与工程科学学报, 2024, 32(5): 1333-1348. DOI: 10.16058/j.issn.1005-0930.2024.05.010
    LI Zhe, ZHAO Jinpeng, LIU Lulu, LIU Xiaoyan. Evolution Characteristics of Temperature Humidity Field and Uneven Settlement Analysis of Loess Embankments in Longdong[J]. Journal of Basic Science and Engineering, 2024, 32(5): 1333-1348. DOI: 10.16058/j.issn.1005-0930.2024.05.010
    Citation: LI Zhe, ZHAO Jinpeng, LIU Lulu, LIU Xiaoyan. Evolution Characteristics of Temperature Humidity Field and Uneven Settlement Analysis of Loess Embankments in Longdong[J]. Journal of Basic Science and Engineering, 2024, 32(5): 1333-1348. DOI: 10.16058/j.issn.1005-0930.2024.05.010

    陇东黄土路堤温/湿度场演化特征及不均匀沉降分析

    Evolution Characteristics of Temperature Humidity Field and Uneven Settlement Analysis of Loess Embankments in Longdong

    • 摘要: 陇东属典型黄土区,修建在当地的建筑物易受黄土湿陷性影响.以银昆高速固原市寨科乡K171+398.23-K171+370.23填方科研段为例,研究了道路在施工期及工后期受大气循环影响地基、路基温/湿度场变化及沉降变形特性.研究结果表明,高温阶段和冷冻阶段,路基内部温/湿度变化随深度呈线性分布,地基温/湿度变化较小,顶层温/湿度变化明显高于底层,温度监测最小值接近2℃,冻结深度小于1.5m.沉降变形主要发生在施工期,受机械扰动影响严重,最大值为24mm(施工期)、最小值为0.88mm(工后期),深部土层沉降明显高于上部土层,差异沉降明显体现在路基和地基交界面以及地基深度在1m处.

       

      Abstract: Longdong is a typical loess region,where local buildings are easily impacted by the collapsibility of loess.This study examines the section from K171+398.23 to K171+370.23 in Zhaike Township,Guyuan City,on the Yinkun Expressway.It investigates the temperature and humidity field changes and settlement deformation characteristics of the foundation and subgrade under atmospheric circulation during and after construction.The results indicate that during high temperature and freezing phases,the temperature and humidity changes inside the roadbed exhibit a linear distribution with depth.In contrast,the foundation experiences relatively minor changes,with the top layer showing significantly higher temperature and humidity variations than the bottom layer.The minimum recorded temperature is close to 2℃,with a freezing depth of less than 1.5m.Settlement deformation predominantly occurs during construction,severely affected by mechanical disturbances,with a maximum value of 24mm and a minimum of 0.88mm in the post-construction stage.The settlement of the deep soil layer is substantially higher than that of the upper layer,with differential settlement prominently observed at the interface between the roadbed and foundation,as well as at a depth of 1m within the foundation.

       

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