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黄土高填方场地裂缝的发育特征及分布规律

于永堂 郑建国 张继文 刘智

于永堂, 郑建国, 张继文, 刘智. 黄土高填方场地裂缝的发育特征及分布规律[J]. 中国地质灾害与防治学报, 2021, 32(4): 85-92. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-11
引用本文: 于永堂, 郑建国, 张继文, 刘智. 黄土高填方场地裂缝的发育特征及分布规律[J]. 中国地质灾害与防治学报, 2021, 32(4): 85-92. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-11
Yongtang YU, Jianguo ZHENG, Jiwen ZHANG, Zhi LIU. Development and distribution characteristics of ground fissures in high loess filled ground[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(4): 85-92. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-11
Citation: Yongtang YU, Jianguo ZHENG, Jiwen ZHANG, Zhi LIU. Development and distribution characteristics of ground fissures in high loess filled ground[J]. The Chinese Journal of Geological Hazard and Control, 2021, 32(4): 85-92. doi: 10.16031/j.cnki.issn.1003-8035.2021.04-11

黄土高填方场地裂缝的发育特征及分布规律

doi: 10.16031/j.cnki.issn.1003-8035.2021.04-11
基金项目: 国家自然科学基金项目(41790442);陕西省“三秦学者”创新团队支持计划资助(2013KCT–13);陕西省技术创新引导专项(基金)计划项目(2020CGHJ-002)
详细信息
    作者简介:

    于永堂(1983-),男,满族,辽宁鞍山人,博士,高级工程师,主要从事岩土工程监测与检测技术、湿陷性土工程性质评价与地基处理技术的研究与应用。E-mail:yuyongtang@126.com

  • 中图分类号: TU 433

Development and distribution characteristics of ground fissures in high loess filled ground

  • 摘要: 裂缝是高填方场地常见隐患,对工程场地安全和稳定造成影响。基于陕北某黄土高填方场地的裂缝监测和探测资料,分析裂缝的发育特征、分布规律和时间变化,从场地地形条件、填土厚度、变形特征等方面,对裂缝的成因机制进行探讨。研究结果表明,裂缝主要在填方区发育,分布于填方厚度小于15 m及距离挖填分界线20 m以内的区域内,以挖填交界过渡带(挖填厚度≤5 m)为主,裂缝走向与挖填界线或原地基的等高线近似一致;裂缝宽度增大速率逐渐降低,从出现到趋于稳定约需3个月时间;裂缝受降水侵蚀、潜蚀等作用,常伴生发育落水洞,并沿填土与谷坡接茬面延伸发展,距地面最大垂直深度可达7.5 m;沟谷地形、填土厚度差异等引起的差异沉降和水平位移是导致黄土高填方发生裂缝的主要原因。
  • 图  1  黄土高填方场地的剖面示意图

    Figure  1.  Section diagram of high loess filled ground

    图  2  电测式裂缝宽度监测装置结构示意图

    Figure  2.  Schematic diagram of electronic measurement device for measuring width of ground fissures

    图  3  1B-LF1号裂缝上裂缝宽度监测点的布置图

    Figure  3.  Layout of monitoring positions

    图  4  试验场地内的典型裂缝

    Figure  4.  Typical fissures in the testing site

    图  5  裂缝的典型形态与组合

    Figure  5.  The typical forms and combinations of fissures

    图  6  裂缝及伴生落水洞

    Figure  6.  The fissures and associated sinkholes

    图  7  高密度电法探测线布置图

    Figure  7.  Detection lines for high-density resistivity method

    图  8  测线的电阻率剖面图

    Figure  8.  Resistivity profile of each detection line

    图  9  裂缝数量在不同填土厚度区间的分布

    Figure  9.  The number of fissures in different intervals of filling thickness

    图  10  裂缝数量在不同距离区间的分布

    Figure  10.  Nnumber of fissures in different distance intervals from excavation-filling boundary

    图  11  裂缝数量在不同长度区间的分布

    Figure  11.  Number of fissures in different intervals of length

    图  12  裂缝最大张开宽度情况统计

    Figure  12.  Statistics of the maximum opening width of fissures

    图  13  裂缝宽度随时间变化曲线

    Figure  13.  Curves of fissures width with time

    图  14  典型横断面的工后沉降曲线

    Figure  14.  Curves of post-construction settlement of typical cross section

    图  15  挖填交接带的裂缝示意图

    Figure  15.  Schematic diagram of fissures in the transition zone between excavation and filling ground

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出版历程
  • 收稿日期:  2020-11-27
  • 修回日期:  2020-12-16
  • 网络出版日期:  2021-10-11
  • 刊出日期:  2021-08-25

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