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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
引用本文:冯迪,王媛,高山,余昌蔚. 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[J]. 长江科学院院报, 2019, 36(10): 180-184. DOI: 10.11988/ckyyb.20190863
作者姓名:冯迪  王媛  高山  余昌蔚
作者单位:河海大学 土木与交通学院,南京,210098;江苏省分淮入沂整治工程建设管理局,江苏 扬州,225002
基金项目:国家重点研发计划项目(2017YFC1502603);国家自然科学基金项目(51609069)
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
收稿时间:2019-07-22

Effectiveness of Vertical Anti-seepage Body in Typical Levee Segment ofHuaihe River Drainage Project: Analysis and Evaluation
FENG Di,WANG Yuan,GAO Shan,YU Chang-wei. Effectiveness of Vertical Anti-seepage Body in Typical Levee Segment ofHuaihe River Drainage Project: Analysis and Evaluation[J]. Journal of Yangtze River Scientific Research Institute, 2019, 36(10): 180-184. DOI: 10.11988/ckyyb.20190863
Authors:FENG Di  WANG Yuan  GAO Shan  YU Chang-wei
Affiliation: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
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.
Keywords:levee project  vertical anti-seepage body  seepage field  effectiveness of seepage-control  evaluation  
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