长江科学院院报 ›› 2023, Vol. 40 ›› Issue (6): 133-138.DOI: 10.11988/ckyyb.20220390

• 岩土工程 • 上一篇    下一篇

盲沟泄水降压技术在地下构筑物抗浮中的应用探讨

陶文涛1, 湛海群1, 孙毅2, 谢俊3, 罗会平3, 董俊3, 安旭文4   

  1. 1.武汉地铁集团有限公司,武汉 430077;
    2.湖南省工程建设监理有限公司,长沙 410000;
    3.中铁第四勘察设计院集团有限公司,武汉 430063;
    4.武汉大学 土木建筑工程学院,武汉 430072
  • 收稿日期:2022-04-14 修回日期:2022-06-28 出版日期:2023-06-01 发布日期:2023-06-21
  • 通讯作者: 安旭文(1970-),男,甘肃民乐人,副教授,博士,主要从事混凝土结构基本理论与应用研究。E-mail: axw002@163.com
  • 作者简介:陶文涛(1978-),男,湖北团风人,高级工程师,硕士,主要从事岩土工程的应用研究。E-mail: 48871245@qq.com

Application of Depressurization Technology by Blind Trench Drainage in Anti-floating of Underground Structures

TAO Wen-tao1, ZHAN Hai-qun1, SUN Yi2, XIE Jun3, LUO Hui-ping3, DONG Jun3, AN Xu-wen4   

  1. 1. Wuhan Metro Group Co.,Ltd.,Wuhan 430077, China;
    2. Hunan Engineering Consulting Company,Changsha 410000,China;
    3. China Railway Fourth Survey and Design Institute Group Co.,Ltd.,Wuhan 430063,China;
    4. School of Civil Engineering, Wuhan University,Wuhan 430072,China
  • Received:2022-04-14 Revised:2022-06-28 Online:2023-06-01 Published:2023-06-21

摘要: 根据武汉地区长江三级阶地的地层特点,分别从泄水降压技术在实际工程中的应用、盲沟泄水降压试验模型的理论分析和试验结果,以及盲沟的可靠性和耐久性等方面对盲沟泄水降压的可行性进行了分析探讨。结果表明:试验模型渗流量的计算结果和试验结果相差不大;当地下构筑物基底位于渗透性较弱的黏土层中,采用盲沟泄水降压技术不仅可有效降低地下构筑物的抗浮水位,且盲沟的渗流量较小,长期泄水对周边环境的影响也较小。因此,当地下构筑物基底位于武汉长江三级阶地的黏土层中,采用盲沟泄水降压技术可有效降低甚至完全消除地下构筑物的抗浮水位,尤其对上部结构自重较轻的地铁地下车站的抗浮有着广阔的应用前景。

关键词: 抗浮稳定设计, 盲沟, 泄水降压, 可行性分析, 长江三级阶地

Abstract: Based on geological characteristics of the three-level terraces in the Yangtze River at Wuhan, we analyze the feasibility of depressurization by blind trench drainage. We introduce the practical application of drainage depressurization in engineering projects, present the theoretical analysis and experimental results of blind trench drainage test models, and evaluates the reliability and durability of blind trenches. The findings demonstrate a close agreement between the calculated seepage flow of the test models and the actual experimental results. When the foundation of underground structures is situated in less permeable clay layers,the blind trench drainage technique proves effective in reducing the buoyant water level of these structures. Additionally, blind trenches exhibit minimal seepage flow, resulting in negligible long-term impact on the surrounding environment. Consequently, in areas where the foundations of underground structures lie within the clay layers of the three-level terraces in the Yangtze River at Wuhan, the blind trench drainage technique proves highly efficient in significantly reducing or even completely eliminating the buoyant water level of underground structures. This approach holds substantial potential for application, particularly in the anti-floating of underground stations of subway systems with relatively low self-weight.

Key words: anti-floating stability design, blind trench, depressurization by drainage, feasibility analysis, three-level terrace

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