[1]刘大勇,杨　平,谷亚军,等.地铁明挖区间分期交界面涌水液氮冻结修复与实测[J].郑州大学学报(工学版),2026,47(01):102-109.[doi:10.13705/j.issn.1671-6833.2025.04.011]
　LIU Dayong,YANG Ping,GU Yajun,et al.Field Measurement Study on Liquid Nitrogen Freezing for Controlling Water Seepage at Tunnel Open-cut Excavation Interfaces[J].Journal of Zhengzhou University (Engineering Science),2026,47(01):102-109.[doi:10.13705/j.issn.1671-6833.2025.04.011]
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地铁明挖区间分期交界面涌水液氮冻结修复与实测()
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《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:
47
期数:
2026年01期
页码:
102-109
栏目:
出版日期:
2026-01-06

文章信息/Info

Title:
Field Measurement Study on Liquid Nitrogen Freezing for Controlling Water Seepage at Tunnel Open-cut Excavation Interfaces
文章编号:
1671-6833(2026)01-0102-08
作者:
刘大勇1;  杨　平1;  谷亚军2;  成建华2;  王加辉1
1.南京林业大学 土木工程学院,江苏 南京 210037;2.苏州市轨道交通建设有限公司,江苏 苏州 215004
Author(s):
LIU Dayong1;  YANG Ping1;  GU Yajun2;  CHENG Jianhua2;  WANG Jiahui1
1.College of Civil Engineering, Nanjing Forestry University, Nanjing 210037, China; 2. Suzhou Rail Transit Construction Co., Ltd., Suzhou 215004, China
关键词:
突涌;  液氮冻结修复;  冻结壁发展速度;  液氮消耗量;  实测研究
Keywords:
water inrush;  liquid nitrogen freezing repair;  growth rate of the freezing wall;  liquid nitrogen consumption;  field measurement study
分类号:
TU445
DOI:
10.13705/j.issn.1671-6833.2025.04.011
文献标志码:
A
摘要:
苏州某地铁建设工程河道内分期明挖区间基坑水泥搅拌桩因先期开挖时变形过大,导致止水帷幕失效,且经双液注浆结合MJS加固处理后仍未能阻绝涌砂冒水。为此,通过采取液氮人工冻结形成有效止水帷幕,成功实现在大渗流条件下对失效止水帷幕的修复施工。对基坑止水帷幕失效进行分析,提出液氮冻结修复施工方案,采用现场实测的方法,统计分析了液氮冻结止水修复施工过程中冻结壁温度、液氮用量与冻结壁发展速度的变化规律。结果表明:水泥系改良土渗漏处冻结壁发展速度为67.3 mm/d,是无渗流处冻结壁平均发展速度的58.6%。渗流点冻结土体温度与非渗漏处冻结土体温度相差达40 ℃以上,渗流条件对冻结壁的发展抑制作用明显。积极冻结期冻结每立方米土消耗液氮1.671×103 kg,维护冻结期单组每日消耗液氮3.49×103 kg,为经验预估值的48.5%。
Abstract:
In a certain subway construction project in Suzhou, the cement soil mixed piles in the open-cut excavation area of the river channel experienced excessive deformation during the initial excavation, resulting in the failure of the waterproof curtain. Even after treatment with double-liquid grouting combined with MJS reinforcement, it remained ineffective in stopping the flow of sand and water. By using liquid nitrogen artificial ground freezing to form an effective waterproof curtain, the repair construction of the failed waterproof curtain on the condition of large seepage was successfully realized. An analysis of the failure of the foundation pit′s waterproof curtain was conducted, and a construction plan for liquid nitrogen freezing repair was proposed. Using on-site measurements, the study statistically evaluated the temperature of the frozen wall, the consumption of liquid nitrogen, and the growth rate of the freezing wall during the repair construction process. The results showed that the growth rate of the freezing wall at the leakage site of the cement-based improved soil was 67.3 mm/d, which was 58.6% of the average expansion rate of the frozen wall at the non-seepage area, and the temperature difference between the frozen soil at the seepage point and the non-seepage area exceeded 40 ℃ , which showed a clearly inhibitory effect on the expansion of the frozen wall. During the active freezing period, each cubic meter of soil required 1.671×103 kg of liquid nitrogen, and each set of freezing pipes consumed 3.49×103 kg of liquid nitrogen daily during the maintenance freezing period, which was 48.5% of the empirical estimate.

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更新日期/Last Update: 2026-01-17