盾构法联络通道密封垫设计及防水试验研究
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摘要
为探究适合盾构法联络通道工程的密封垫断面形式,以宁波市轨道交通3号线第1条盾构法联络通道为工程背景,针对遇水膨胀橡胶设计阴阳凹凸、圆形孔洞、梳形、矩形等4类断面。对各断面形式进行可行性分析,选取阴阳凹凸断面与矩形断面作为初选方案。利用Abaqus/Explicit计算模块对2种断面的接触应力进行有限元分析,通过设计"一"字缝耐水压力试验,验证数值模拟中接触应力较大的矩形断面的防水能力。研究表明:1)数值模拟结果显示,接触面最大接触应力与平均接触应力均随着张开量的增加而减小;同等张开量与错台量下,在压缩与膨胀2个阶段中,矩形断面的接触应力均大于阴阳凹凸断面,因此选取矩形断面作为备选方案。2)"一"字缝耐水压力试验结果表明,矩形断面密封垫保压48 h后耐水压力明显提升,且张开量越大耐水压力提升幅度越大。3)综合数值模拟与试验结果可知,该矩形断面密封垫满足0.6 MPa的防水要求。
In this paper,4 cross-section types of hydro-expansive rubber sealing gaskets,i. e. yin and yang concaveconvex,circular hole,comb-shape and rectangular shape,are designed based on the first connection gallery bored by shield on Line No. 3 of Ningbo Rail Transit. The feasibilities of the 4 cross-section types of sealing gaskets are analyzed,and the types of yin and yang concave-convex and rectangular shape of sealing gasket are selected as primary schemes. The contact stresses of above-mentioned two types of cross-section are studied by Abaqus/Explicit computation module,and the waterproofing pressure test is designed to verify the waterproofing ability of the sealing gasket with rectangular cross-section with higher contact stress in numerical simulation. The results show that:( 1) The numerical simulation results show that the maximum contact stress and average contact stress of contact face decrease with the increase of joint opening; during the compression and expansion phases,the contact stresses of sealing gasket with rectangular cross-section are larger than that of sealing gasket with yin and yang concave-convex cross-section,hence,the rectangular shape cross-section is selected as an alternative scheme.( 2) The waterproofing pressure test show that the waterproofing pressure of sealing gasket with rectangular cross-section increases obviously after preserving pressure for 48 h,and the larger the joint opening is,the lager the increase of waterproofing pressure is.( 3) According to the numerical simulation results and test results,the sealing gasket with rectangular cross-section can meet waterproofing requirement of 0.6 MPa.
In this paper,4 cross-section types of hydro-expansive rubber sealing gaskets,i. e. yin and yang concaveconvex,circular hole,comb-shape and rectangular shape,are designed based on the first connection gallery bored by shield on Line No. 3 of Ningbo Rail Transit. The feasibilities of the 4 cross-section types of sealing gaskets are analyzed,and the types of yin and yang concave-convex and rectangular shape of sealing gasket are selected as primary schemes. The contact stresses of above-mentioned two types of cross-section are studied by Abaqus/Explicit computation module,and the waterproofing pressure test is designed to verify the waterproofing ability of the sealing gasket with rectangular cross-section with higher contact stress in numerical simulation. The results show that:( 1) The numerical simulation results show that the maximum contact stress and average contact stress of contact face decrease with the increase of joint opening; during the compression and expansion phases,the contact stresses of sealing gasket with rectangular cross-section are larger than that of sealing gasket with yin and yang concave-convex cross-section,hence,the rectangular shape cross-section is selected as an alternative scheme.( 2) The waterproofing pressure test show that the waterproofing pressure of sealing gasket with rectangular cross-section increases obviously after preserving pressure for 48 h,and the larger the joint opening is,the lager the increase of waterproofing pressure is.( 3) According to the numerical simulation results and test results,the sealing gasket with rectangular cross-section can meet waterproofing requirement of 0.6 MPa.
引文
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[5]何太洪,王炳龙,刘建国,等.隧道管片密封垫接触应力和闭合压力的合理确定[J].城市轨道交通研究,2009,12(12):60.HE Taihong,WANG Binglong,LIU Jianguo,et al. Rational determination of elastic gasket contact stess and closure pressure for shield tunnel segments[J]. Urban Mass Transit,2009,12(12):60.
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[8]大眆正博.シ!ルド工事用セグメントの水膨张シ!ル材による止水设计法に"する研究[D].东京:早#田大学,2002.MASAHIRO Otsuka. Study of waterproof design methods by water expansion sealing materials of segment for shield construction[D]. Tokyo:Waseda University,2002.
[9]刘建国.盾构隧道遇水膨胀密封带接触压力试验研究[J].地下空间与工程学报,2009,5(6):1122.LIU Jianguo. The experimental research of the contact pressure of hydrophilic sealing gasket for shield tunnel segments[J]. Chinese Journal of Underground Space and Engineering,2009,5(6):1122.
[10]刘建国,王文渊.类矩形盾构隧道防水设计及相关拼装参数分析[J].现代隧道技术,2016(增刊1):151.LIU Jianguo,WANG Wenyuan. Analysis on waterproofing design and erection parameter for a quasi-rectangular shield tunnel[J]. Modern Tunnelling Technology,2016(S1):151.
[11]李永刚.盾构法隧道管片接缝防水橡胶密封垫研制[J].特种橡胶制品,2010,31(6):51.LI Yonggang. Development on waterproof rubber gasket for shild-driven tunnel[J]. Special Purpose Rubber Products,2010,31(6):51.
[12]樊庆功,方卫民,苏许斌.盾构隧道遇水膨胀橡胶密封垫止水性能试验研究[J].地下空间,2002(4):335.FAN Qinggong,FANG Weimin,SU Xubin. Experimental study of the waterproof capability of the hydro-expansive rubber sealing cushion in shield tunnel[J]. Underground Space,2002(4):335.
[13]郑明军,王文静,陈政南,等.橡胶Mooney-Rivlin模型力学性能常数的确定[J].橡胶工业,2003(8):462.ZHENG Mingjun, WANG Wenjing, CHEN Zhengnan,et al. Determination for mechanical constants of rubber Mooney-Rivlin model[J]. China Rubber Industry,2003(8):462.
[14]吴挺.盾构越江隧道密封垫长期防水能力研究[D].上海:同济大学,2014.WU Ting. Study of the long term waterproof property on the sealing gasket of shield tunnel[D]. Shanghai:Tongji University,2014.
[15]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):994.LIU Jianguo,ZHOU Shunhua. Analysis of the performance of the shield tunnel gasket compression considering the balloon effect[J]. Journal of Building Materials,2013,16(6):994.
[2]刘建航,侯学渊.盾构法隧道[M].北京:中国铁道出版社,1991.LIU Jianhang,HOU Xueyuan. Shield tunnel[M]. Beijing:China Railway Publishing House,1991.
[3] SCHURCH M. Small but important-gaskets for tunnel segment[C]//Proceedings of International Symposiumon on Underground Excavation and Tunnelling.[S. l.]:[s. n.],2006.
[4]贺腾飞,刘建国.盾构隧道复合型密封垫压缩性能分析[J].地下工程与隧道,2015(增刊):29.HE Tengfei, LIU Jianguo. Analysis of compression performance of compound elastic sealing gasket for shield tunnel[J]. Underground Engineering and Tunnels, 2015(S):29.
[5]何太洪,王炳龙,刘建国,等.隧道管片密封垫接触应力和闭合压力的合理确定[J].城市轨道交通研究,2009,12(12):60.HE Taihong,WANG Binglong,LIU Jianguo,et al. Rational determination of elastic gasket contact stess and closure pressure for shield tunnel segments[J]. Urban Mass Transit,2009,12(12):60.
[6]张子新,孙杰,朱雁飞,等.深埋排蓄水隧道接缝密封垫防水性能试验研究[J].浙江大学学报(工学版),2018,52(3):431.ZHANG Zixin,SUN Jie,ZHU Yanfei,et al. Experimental study of waterproof performance of joint seal for deeplyburied storage and drainage tunnel[J]. Journal of Zhejiang University(Engineering Science),2018,52(3):431.
[7]朱祖熹.盾构隧道管片接缝防水技术的新认识[J].隧道与轨道交通,2017(增刊1):10.ZHU Zuxi. New understanding of waterproofing technology for segment joints of shield tunnels[J]. Tunnels and Rail Transit,2017(S1):10.
[8]大眆正博.シ!ルド工事用セグメントの水膨张シ!ル材による止水设计法に"する研究[D].东京:早#田大学,2002.MASAHIRO Otsuka. Study of waterproof design methods by water expansion sealing materials of segment for shield construction[D]. Tokyo:Waseda University,2002.
[9]刘建国.盾构隧道遇水膨胀密封带接触压力试验研究[J].地下空间与工程学报,2009,5(6):1122.LIU Jianguo. The experimental research of the contact pressure of hydrophilic sealing gasket for shield tunnel segments[J]. Chinese Journal of Underground Space and Engineering,2009,5(6):1122.
[10]刘建国,王文渊.类矩形盾构隧道防水设计及相关拼装参数分析[J].现代隧道技术,2016(增刊1):151.LIU Jianguo,WANG Wenyuan. Analysis on waterproofing design and erection parameter for a quasi-rectangular shield tunnel[J]. Modern Tunnelling Technology,2016(S1):151.
[11]李永刚.盾构法隧道管片接缝防水橡胶密封垫研制[J].特种橡胶制品,2010,31(6):51.LI Yonggang. Development on waterproof rubber gasket for shild-driven tunnel[J]. Special Purpose Rubber Products,2010,31(6):51.
[12]樊庆功,方卫民,苏许斌.盾构隧道遇水膨胀橡胶密封垫止水性能试验研究[J].地下空间,2002(4):335.FAN Qinggong,FANG Weimin,SU Xubin. Experimental study of the waterproof capability of the hydro-expansive rubber sealing cushion in shield tunnel[J]. Underground Space,2002(4):335.
[13]郑明军,王文静,陈政南,等.橡胶Mooney-Rivlin模型力学性能常数的确定[J].橡胶工业,2003(8):462.ZHENG Mingjun, WANG Wenjing, CHEN Zhengnan,et al. Determination for mechanical constants of rubber Mooney-Rivlin model[J]. China Rubber Industry,2003(8):462.
[14]吴挺.盾构越江隧道密封垫长期防水能力研究[D].上海:同济大学,2014.WU Ting. Study of the long term waterproof property on the sealing gasket of shield tunnel[D]. Shanghai:Tongji University,2014.
[15]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):994.LIU Jianguo,ZHOU Shunhua. Analysis of the performance of the shield tunnel gasket compression considering the balloon effect[J]. Journal of Building Materials,2013,16(6):994.