长江科学院院报 ›› 2019, Vol. 36 ›› Issue (10): 180-184.DOI: 10.11988/ckyyb.20190863

• 堤防险情处置 • 上一篇    

分淮入沂整治工程典型堤段垂直防渗体防渗效果分析与评价

冯迪1, 王媛1, 高山2, 余昌蔚1   

  1. 1.河海大学 土木与交通学院,南京 210098;
    2.江苏省分淮入沂整治工程建设管理局,江苏 扬州 225002
  • 收稿日期:2019-07-22 出版日期:2019-10-01 发布日期:2019-10-21
  • 通讯作者: 王 媛(1969-),女,江苏阜宁人,教授,博士,主要从事岩土渗流理论与测试研究。E-mail:wangyuanhhu@163.com
  • 作者简介:冯 迪(1985-),男,山东枣庄人,副教授,博士,主要从事岩土渗流与环境效应研究。E-mail:fengdi@126.com
  • 基金资助:
    国家重点研发计划项目(2017YFC1502603);国家自然科学基金项目(51609069)

Effectiveness of Vertical Anti-seepage Body in Typical Levee Segment ofHuaihe River Drainage Project: Analysis and Evaluation

FENG Di1, WANG Yuan1, GAO Shan2, YU Chang-wei1   

  1. 1.College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, China;
    2.Authority of Regulation Project of Diverting Huaihe River into Xinyi River, Yangzhou 225002, China
  • Received:2019-07-22 Online:2019-10-01 Published:2019-10-21

摘要: 随着堤防加固技术的进步,垂直防渗加固在众多堤防中得到广泛应用。但由于地质条件的复杂性及工程的隐蔽性,在垂直防渗工程完成后,其防渗效果难以检测与评价。依托分淮入沂整治工程,通过数值模拟方法分析了垂直防渗体的存在、防渗体铺设深度、防渗体完整性及防渗体缺陷位置等对堤防渗流场的影响,以溢出点水力梯度为评价指标,通过与土层允许水力梯度的比较来评价垂直防渗体的防渗效果。结果表明:堤岸经垂直防渗处理后在防渗体后的水头明显下降;防渗体进入堤防黏土层比防渗体未插入黏土层有更好的防渗效果;垂直防渗体存在缺陷时,会引起防渗体后浸润线明显抬升;在溢出点处所有工况的水力梯度都小于允许水力梯度,整个防渗工程防渗效果显著。

关键词: 堤防工程, 垂直防渗体, 渗流场, 防渗效果, 评价

Abstract: Despite wide application of vertical anti-seepage reinforcement in embankments, the effectiveness of anti-seepage is difficult to be detected and evaluated after the anti-seepage project is finished due to the complexity of geological conditions and concealment of project. In this paper we analyzed the effects of vertical anti-seepage body, the depth, damage location, and integrity of anti-seepage body on the seepage field of levee by numerical simulation taking the regulation project of diverting Huaihe River into Xinyi River as a case study. We further examined the effectiveness of anti-seepage body by comparing the hydraulic gradient of spill point with the allowable hydraulic gradient of soil. Results show that the head behind the anti-seepage body decreased markedly after the vertical seepage control treatment was carried out on the levee. The bottom of anti-seepage body inserting into the clay layer of levee had better impervious effect than that of anti-seepage body not inserting into clay layer. In the presence of defectives, the infiltration line rose obviously behind the anti-seepage body. The hydraulic gradient in all conditions at the spill point was smaller than the allowable hydraulic gradient, indicating evident seepage control effect.

Key words: levee project, vertical anti-seepage body, seepage field, effectiveness of seepage-control, evaluation

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