[1]丁文其,李睿佳,乔亚飞,等.盾构隧道快速连接件管片接缝平底密封垫防水性能[J].长安大学学报(自然科学版),2025,45(4):53-67.[doi:10.19721/j.cnki.1671-8879.2025.04.005]
　DING Wen-qi,LI Rui-jia,QIAO Ya-fei,et al.Waterproofing performance of flat-bottomed gaskets for segment joint of shield tunnels with quick connectors[J].Journal of Chang’an University (Natural Science Edition),2025,45(4):53-67.[doi:10.19721/j.cnki.1671-8879.2025.04.005]
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盾构隧道快速连接件管片接缝平底密封垫防水性能()
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长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

卷:
第45卷
期数:
2025年4期
页码:
53-67
栏目:
桥梁与隧道工程
出版日期:
2025-07-30

文章信息/Info

Title:
Waterproofing performance of flat-bottomed gaskets for segment joint of shield tunnels with quick connectors
文章编号:
1671-8879(2025)04-0053-15
作者:
丁文其1; 2; 李睿佳1; 2; 乔亚飞1; 2; 吴昱东1; 2; 于 勇3; 黄继辉4
(1. 同济大学 土木工程学院,上海 200092; 2. 同济大学 岩土及地下工程教育部重点实验室,上海 200092; 3. 中铁第六勘察设计院集团有限公司,天津 300308; 4. 福建船政交通职业学院 轨道交通学院,福建 福州 350007)
Author(s):
DING Wen-qi1; 2;  LI Rui-jia1; 2;  QIAO Ya-fei1; 2;  WU Yu-dong1; 2;  YU Yong3;  HUANG Ji-hui4
(1. College of Civil Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China; 3. China Railway Liuyuan Group Co., Ltd., Tianjin 300308, China; 4. School of Rail Transit, Fujian Chuanzheng Communications College, Fuzhou 350007, Fujian, China)
关键词:
盾构隧道;  快速连接件;  三元乙丙橡胶;  平底密封垫;  接缝防水性能;  热氧老化;  长期性能预测
Keywords:
shield tunnel;  quick connector;  ethylene propylene diene monomer;  flat-bottomed gasket;  waterproofing performance of segment joint;  thermal oxidative aging;  long-term performance prediction
分类号:
U454
DOI:
10.19721/j.cnki.1671-8879.2025.04.005
文献标志码:
A
摘要:
为探索新型平底密封垫的防水性能,对三元乙丙橡胶平底密封垫进行了数值计算,使用万能试验机进行了压缩试验,制作了混凝土管片试块,进行了足尺防水试验,设计并进行了不同张开量下三元乙丙橡胶密封垫压缩热氧老化试验,并使用阿伦尼乌斯方程预测了密封垫的长期防水性能。研究结果表明:错台分别为0、3、5mm时密封垫拼装所需的闭合压力分别为24.85、21.87、24.59 kN/m,平底面设计有效减小了密封垫闭合所需的拼装力; 不同错台下的闭合压力接近,说明取消柱脚结构减小了错台对密封垫压缩性能的影响; 在管片张开3 mm与错台5 mm的最不利工况下,平底密封垫的防水能力达到了0.8 MPa,满足短期设计防水要求的0.7 MPa; 混凝土试具试验得到的极限防水能力小于钢制试具,混凝土的粗糙表面降低了密封垫的防水能力,平底密封垫与混凝土之间的界面可能成为潜在的防水薄弱环节; 将密封垫底面纳入渗水路径考虑后,大部分工况下试验与数值模拟得到的耐水压差在80 kPa以内,数值模拟方法可靠; 与传统带柱脚结构的密封垫不同,取消柱脚结构后底面不再产生应力集中,其防水性能可能小于密封垫顶面; 平底密封垫在管片张开0、3 mm时,常温下老化系数分别为0.45和0.72,老化性能优于传统密封垫与圆柱体试件; 密封垫受到的压力越大,性能衰减越快,且对温度变化更敏感。
Abstract:
To investigate the waterproofing performance of a new type of flat-bottomed ethylene propylene diene monomer(EPDM)gasket, numerical simulations were conducted, compression tests were performed with a universal testing machine, concrete segment test blocks were fabricated for full-scale waterproofing tests, and compressed thermal-oxidative aging tests were designed and carried out under different joint openings. Additionally, the long-term waterproofing performance of the gaskets was predicted using the Arrhenius equation. The research results indicate that when the joint offset is 0, 3 and 5 mm, the closure pressure required for assembling the gasket is 24.85, 21.87, and 24.59 kN/m, respectively. The flat-bottomed design effectively reduces the assembly force required for gasket closure. The similarity in the closure pressure under different offset conditions indicates that the removal of the column base structure reduces the impact of joint offset on the compression performance of gasket. Under the most unfavorable condition of 3 mm joint opening and 5 mm offset, the flat-bottomed gasket achieves a waterproofing capacity of 0.8 MPa, meeting the short-term design waterproofing requirement of 0.7 MPa. The ultimate waterproofing capacity obtained from the test using concrete specimens is lower than that using steel specimens. The rough concrete surface reduces the waterproofing performance and may become a potential weak point for waterproofing. After considering the gasket bottom surface into in the seepage path, the maximum waterproofing pressures obtained through the simulation closely match the test results, with most deviations within 80 kPa,verifying the reliability of the numerical simulation method. Unlike traditional gaskets with column base structures, the removal of the column base eliminates stress concentration at the bottom surface, potentially resulting in lower waterproofing performance at the bottom than the top. Under the joint openings of 0 and 3 mm, the aging coefficients of flat-bottomed gaskets at room temperature are 0.45 and 0.72, respectively, indicating better aging resistance compared to traditional gaskets and cylindrical specimens. The higher the compression force applied to the gasket, the faster the performance of gaskets degradation, and the more sensitive it becomes to temperature change.3 tabs, 15 figs, 32 refs.

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备注/Memo

备注/Memo:
收稿日期:2025-01-22
基金项目:国家自然科学基金项目(52378405); 中国中铁股份有限公司科技研究开发计划(2025-重庆-11); 福建省自然科学基金项目(2022J01390);
作者简介:丁文其(1969-),男,江苏苏州人,教授,博士研究生导师,E-mail:dingwq@tongji.edu.cn。
更新日期/Last Update: 2025-07-25