• 全国中文核心期刊
  • 中国科技核心期刊
  • 美国工程索引(EI)收录期刊
  • Scopus数据库收录期刊

间断级配砂土中管线破损引起的渗流侵蚀模型试验

张冬梅, 杜伟伟, 高程鹏

张冬梅, 杜伟伟, 高程鹏. 间断级配砂土中管线破损引起的渗流侵蚀模型试验[J]. 岩土工程学报, 2018, 40(11): 2129-2135. DOI: 10.11779/CJGE201811020
引用本文: 张冬梅, 杜伟伟, 高程鹏. 间断级配砂土中管线破损引起的渗流侵蚀模型试验[J]. 岩土工程学报, 2018, 40(11): 2129-2135. DOI: 10.11779/CJGE201811020
ZHANG Dong-mei, DU Wei-wei, GAO Cheng-peng. Model tests on seepage erosion caused by pipeline damage in gap-grading sand[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(11): 2129-2135. DOI: 10.11779/CJGE201811020
Citation: ZHANG Dong-mei, DU Wei-wei, GAO Cheng-peng. Model tests on seepage erosion caused by pipeline damage in gap-grading sand[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(11): 2129-2135. DOI: 10.11779/CJGE201811020

间断级配砂土中管线破损引起的渗流侵蚀模型试验  English Version

基金项目: 国家自然科学基金项目(41772295,51478344); 上海市科委资助项目(16DZ1200403)
详细信息
    作者简介:

    张冬梅(1975- ),女,博士,教授,主要从事隧道结构安全及施工环境影响方面的研究。E-mail: dmzhang@tongji.edu.cn。

  • 中图分类号: TU43

Model tests on seepage erosion caused by pipeline damage in gap-grading sand

  • 摘要: 频发的路面塌陷事故对城市安全造成了巨大威胁,主要原因是地下管线破损引起周围土体的渗流侵蚀,进而产生了地下空洞所致。针对目前常见的地下无压管线破损问题,提出了一种研究间断级配砂土中破损管线周围渗流侵蚀特性的模型试验方法。基于试验中的水土流失变化和受侵蚀区域的发展规律,揭示了间断级配砂土中侵蚀过程可分为快速侵蚀阶段、稳定侵蚀阶段和收敛阶段,土体中由于侵蚀变形产生的松动区和空洞扩展规律与砂土流失变化一致。对比不同工况的侵蚀量和最终侵蚀状态,得到了土体饱和度和水位高度通过影响渗流力而改变侵蚀量和空洞形态,土体级配则决定了可流失细砂含量,从而影响侵蚀量和空洞大小,而当管线破损形状只导致细粒流失时,破损尺寸的增加将增多流失路径数量,进而增大了侵蚀量,但此因素影响较小。
    Abstract: Road collapses occur frequently, which is a large threat to the city safety. The collapse is initiated by the ground cavity caused by the internal erosion around buried broken pipelines. In view of this problem, a model test method is presented to study the characteristics of the internal erosion due to broken pipelines in gap-grading sand. The process of erosion could be divided into three stages of rapid erosion, steady erosion and convergence stage in terms of the mass of eroded soil. Loose area and cavity are produced due to deformation of eroded soil and expand similarly to the process of erosion. The soil erosion and final erosion states under different conditions are compared, which reveals that the soil saturation and water level can influence the erosion amount and cavity state by affecting the seepage force. Besides, the initial soil grading determines the content of fine sand which can migrate away, affecting the erosion degree and cavity area. Finally, the larger pipe defect causes more migration pathways and increases the soil loss when the defect shape allows the fine particles to migrate into the pipe merely, but it has little influence.
  • [1] 肖文兴, 钱劲松. 城市道路路基空洞区演变分析[J]. 交通科技, 2016(2): 125-127.
    (XIAO Wen-xing, QIAN Jin-song.Analysis of the evolution of subgrade cavity of urban road[J]. Transportation Science & Technology, 2016(2): 125-127. (in Chinese))
    [2] DELLE ROSE M, LEUCCI G.Towards an integrated approach for characterization of sinkhole hazards in urban environments: the unstable coastal site of Casalabate, Lecce, Italy[J]. Journal of Geophysics and Engineering, 2010, 7(2): 143-154.
    [3] 乔旭, 赵学军, 杨峰, 等. 城市道路土基病害核匹配追踪识别算法[J]. 中国公路学报, 2017, 30(5): 44-51.
    (ZHAO Xu, ZHAO Xue-jun, YANG Feng, et al.Urban road soil subgrade disease recognition by kernel matching pursuit[J]. China Journal of Highway and Transport, 2017, 30(5): 44-51. (in Chinese))
    [4] 李涛, 张子真, 宗露丹. 地下空洞引起土质地层地陷的形成机制与预测研究[J]. 岩土力学, 2015, 36(7): 1995-2002.
    (LI Tao, ZHANG Zi-zhen, ZONG Lu-dan.Study of formation mechanism and prediction of sinkholes in soil stratum induced by subterranean cavity[J]. Rock and Soil Mechanics. 2015, 36(7): 1995-2002. (in Chinese))
    [5] 李倩倩, 张顶立, 房倩. 含空洞地层初始破坏的复变函数解析研究[J]. 岩土工程学报, 2014, 36(11): 2110-2117.
    (LI Qian-qian, ZHANG Ding-li, FANG Qian.Analytic solution to initial damage of cavern strata by complex function method[J]. Chinese Journal of Geotechnical Engineering. 2014, 36(11): 2110-2117. (in Chinese))
    [6] SAURO U.Dolines and sinkholes: aspects of evolution and problems of classification[J]. Acta Carsologica, 2003, 32(2): 41-52.
    [7] WEI Y, SUN S.Study on formation and expansion condition of hidden soil cavity under condition of groundwater exploitation in karst areas[J]. Environmental Earth Sciences, 2017, 76(7): 282.
    [8] SHERARD J L, DUNNIGAN L P, TAIBOT J R.Filters for silts and clays[J]. Journal of Geotechnical Engineering, 1984, 110(6): 701-718.
    [9] KENNEY T C, LAU D.Internal stability of granular filters[J]. Canadian Geotechnical Journal, 1986, 23(3): 420-423.
    [10] FANNIN R J, MOFFAT R.Observations on internal stability of cohesionless soils[J]. Géotechnique, 2015, 56(7): 497-500.
    [11] CHANG D S, ZHANG L M.A stress-controlled erosion apparatus for studying internal erosion in soils[J]. Geotechnical Testing Journal, 2011, 34(6): 579-589.
    [12] BINNER R, HOMBERG U, PROHASKA S, et al.Identification of descriptive parameters of the soil pore structure using experiments and CT data[C]// 5th International Conference on Scour and Erosion. San Francisco, 2010: 397-407.
    [13] HAGHIGHI I, CHEVALIER C, DUC M, et al.Improvement of hole erosion test and results on reference soils[J]. Journal of Geotechnical and Geoenvironmental Engineering, 2013, 139(139): 330-339.
    [14] 胡聿涵, 白玉川, 徐海珏. 近10年中国城市道路塌陷原因及防治对策分析[J]. 公路, 2016(9): 130-135.
    (HU Yu-han, BAI Yu-chuan, XU Hai-jue.Analysis of reasons for urban road collapse and prevention and control countermeasures in recent decade of China[J]. Highway, 2016(9): 130-135. (in Chinese))
    [15] 桑野玲子, 佐藤真理, 瀬良良子. 地盤陥没未然防止のための地盤内空洞・ゆるみの探知に向けた基礎的検討[J]. 地盤工学ジャーナル,2010, 5(2): 219-229.
    (KUWANO R, SATO M, SERA R.Study on the detection of underground cavity and ground looseningfor the prevention of ground cave-in accident[J]. Japanese Geotechnical Journal, 2010, 5(2): 219-229. (in Japanese))
    [16] SATO M, KUWANO R.Influence of location of subsurface structures on development of underground cavities induced by internal erosion[J]. Soils and Foundations, 2015, 55(4): 829-840.
    [17] KUWANO R, KOHATA Y, SATO M.A case study of ground cave-in due to large scale subsurface erosion in old land fill[C]// 6th International Conference on Scour and Erosion. Paris, 2012: 265-271.
    [18] 桑野玲子, 堀井俊孝, 山内慶太, 等. 老朽下水管損傷部からの土砂流出に伴う地盤内空洞・ゆるみ形成過程に関する検討[J]. 地盤工学ジャーナル,2010, 5(2): 349-361.
    (KUWANO R, HORII T, YAMAUCHI K, et al.Formation of subsurface cavity and loosening due to defected old sewer pipe[J]. Japanese Geotechnical Journal, 2010, 5(2): 349-361. (in Japanese))
    [19] MUKUNOKI T, KUMANO N, OTANI J, et al.Visualization of three dimensional failure in sand due to water inflow and soil drainage from defective underground pipe using x-ray CT[J]. Soils and Foundations, 2009, 49(6): 959-968.
  • 期刊类型引用(2)

    1. 宝鑫,刘晶波,李述涛,陆喜欢,王菲. 地下结构整体式反应位移法的改进. 工程力学. 2023(01): 76-86 . 百度学术
    2. 肖鑫华. 基于数值模拟对深埋引水隧洞地震响应研究. 水利科技与经济. 2022(12): 105-109+115 . 百度学术

    其他类型引用(7)

计量
  • 文章访问数: 
  • HTML全文浏览量:  0
  • PDF下载量: 
  • 被引次数: 9
出版历程
  • 收稿日期:  2017-09-16
  • 发布日期:  2018-11-24

目录

    /

    返回文章
    返回