防控盾构隧道渗漏灾变的管片密封垫尺寸优化
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摘要
增加密封垫防水性能可有效减少管片接缝渗漏现象的发生,进而提高隧道渗漏防控可靠度。优化密封垫截面尺寸可明显提高密封垫防水性能,因此,针对密封垫截面外轮廓尺寸取值对密封垫防水性能的影响进行数值模拟。采用ABAQUS内嵌网格求解变换技术解决数值模拟计算收敛困难的问题,结合已有研究成果验证该技术的可行性。通过对比分析计算结果得到密封垫接触应力和闭合压力随压缩度的变化规律,为提高密封垫防水性能提供新思路。
Increasing the waterproof performance of sealing gaskets can effectively reduce the leakage of segment joints,thereby improving the reliability of tunnel disaster prevention. Optimizing the cross-sectional size of the seal can significantly improve the waterproof performance of the gaskets. Therefore,the numerical simulation of the waterproof performance of the gaskets is carried out for the outer diameter of the cross-section of gaskets. The ABAQUS embedded grid solution transformation technology is used to solve the problem of difficulty in numerical simulation. Combined with the previous research results,the feasibility of the technology is verified. By comparing and analyzing the calculated structure,the variation of contact stress and closure pressure with compression is obtained,which provides a new idea for improving the waterproof performance of the gaskets.
Increasing the waterproof performance of sealing gaskets can effectively reduce the leakage of segment joints,thereby improving the reliability of tunnel disaster prevention. Optimizing the cross-sectional size of the seal can significantly improve the waterproof performance of the gaskets. Therefore,the numerical simulation of the waterproof performance of the gaskets is carried out for the outer diameter of the cross-section of gaskets. The ABAQUS embedded grid solution transformation technology is used to solve the problem of difficulty in numerical simulation. Combined with the previous research results,the feasibility of the technology is verified. By comparing and analyzing the calculated structure,the variation of contact stress and closure pressure with compression is obtained,which provides a new idea for improving the waterproof performance of the gaskets.
引文
[1]周彩荣.武汉某地铁盾构隧道运营期常见病害原因分析及治理措施[J].城市轨道交通研究,2018,21(12):153-157.
[2]宋立平,谢强,唐斌.盾构隧道防水保障措施及病害处理[J].中小企业管理与科技(下旬刊),2018(8):193-196.
[3]陈向红,陶连金,田治旺.富水砂层中深埋隧道施工防排水技术[J].施工技术,2018,47(3):84-87.
[4]李铁成.盾构斜井管片接缝防水设计及防水性能试验研究[J].施工技术,2016,45(21):124-126.
[5]朱祖熹.盾构隧道管片接缝密封垫防水技术的现状与今后的课题[J].隧道建设,2016,36(10):1171-1176.
[6]拓勇飞,舒恒,郭小红,等.超高水压大直径盾构隧道管片接缝防水设计与试验研究[J].岩土工程学报,2013,35(S1):227-231.
[7]赵明,丁文其,彭益成,等.高水压盾构隧道管片接缝防水可靠性试验研究[J].现代隧道技术,2013,50(3):87-93.
[8]吴炜枫,丁文其,魏立新,等.深层排水盾构隧道接缝防水密封垫形式试验研究[J].现代隧道技术,2016,53(6):190-195.
[9]朱洺嵚,丁文其,金跃郎,等.上海市高水压深层排水盾构隧道管片接缝密封垫形式试验研究[J].隧道建设,2017,37(10):1303-1308.
[10]向科.盾构隧道弹性密封垫优化设计与试验研究[J].中国建筑防水,2010(10):30-35.
[11]雷震宇.盾构隧道管片橡胶密封垫的优化设计方法[J].地下空间与工程学报,2010,6(4):770-774.
[12]罗驰,雷震宇.孔洞排布型式对盾构隧道橡胶密封垫的受力差异及稳定性分析[J].城市轨道交通研究,2015,18(5):44-47,52.
[13]刘建国,周顺华.考虑气囊效应的盾构隧道密封垫压缩性能分析[J].建筑材料学报,2013,16(6):993-997.
[14]孙廉威.基于施加水压的盾构接缝防水机制数值分析[J].隧道建设(中英文),2018,38(4):603-610.
[15]上海市隧道工程轨道交通设计研究院,清华大学.隧道工程防水技术规范:CECS 370:2014[S].北京:中国计划出版社,2014.
[16]丁杨,孟伟,邓文武.盾构管片橡胶密封垫断面形式设计及耐久性研究[J].华东交通大学学报,2016,33(4):45-49.
[17]王湛.水下盾构隧道弹性密封垫防水失效数值模拟研究[J].隧道建设,2015,35(11):1164-1168.
[2]宋立平,谢强,唐斌.盾构隧道防水保障措施及病害处理[J].中小企业管理与科技(下旬刊),2018(8):193-196.
[3]陈向红,陶连金,田治旺.富水砂层中深埋隧道施工防排水技术[J].施工技术,2018,47(3):84-87.
[4]李铁成.盾构斜井管片接缝防水设计及防水性能试验研究[J].施工技术,2016,45(21):124-126.
[5]朱祖熹.盾构隧道管片接缝密封垫防水技术的现状与今后的课题[J].隧道建设,2016,36(10):1171-1176.
[6]拓勇飞,舒恒,郭小红,等.超高水压大直径盾构隧道管片接缝防水设计与试验研究[J].岩土工程学报,2013,35(S1):227-231.
[7]赵明,丁文其,彭益成,等.高水压盾构隧道管片接缝防水可靠性试验研究[J].现代隧道技术,2013,50(3):87-93.
[8]吴炜枫,丁文其,魏立新,等.深层排水盾构隧道接缝防水密封垫形式试验研究[J].现代隧道技术,2016,53(6):190-195.
[9]朱洺嵚,丁文其,金跃郎,等.上海市高水压深层排水盾构隧道管片接缝密封垫形式试验研究[J].隧道建设,2017,37(10):1303-1308.
[10]向科.盾构隧道弹性密封垫优化设计与试验研究[J].中国建筑防水,2010(10):30-35.
[11]雷震宇.盾构隧道管片橡胶密封垫的优化设计方法[J].地下空间与工程学报,2010,6(4):770-774.
[12]罗驰,雷震宇.孔洞排布型式对盾构隧道橡胶密封垫的受力差异及稳定性分析[J].城市轨道交通研究,2015,18(5):44-47,52.
[13]刘建国,周顺华.考虑气囊效应的盾构隧道密封垫压缩性能分析[J].建筑材料学报,2013,16(6):993-997.
[14]孙廉威.基于施加水压的盾构接缝防水机制数值分析[J].隧道建设(中英文),2018,38(4):603-610.
[15]上海市隧道工程轨道交通设计研究院,清华大学.隧道工程防水技术规范:CECS 370:2014[S].北京:中国计划出版社,2014.
[16]丁杨,孟伟,邓文武.盾构管片橡胶密封垫断面形式设计及耐久性研究[J].华东交通大学学报,2016,33(4):45-49.
[17]王湛.水下盾构隧道弹性密封垫防水失效数值模拟研究[J].隧道建设,2015,35(11):1164-1168.