沉管隧道预制管节顶推滑移系统摩擦试验研究
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摘要
为了针对某大型沉管隧道预制管节的顶推滑移系统选择合适的摩擦面材料,文章对该顶推滑移系统的四组拟采用摩擦面材料(不锈钢板-PTFE、不锈钢板-NGE、普通钢板-PTFE、普通钢板-NGE)进行了静、动态摩擦系数测试。利用20 000 k N压剪试验机、采用双剪法进行了模拟测试试验。试验结果表明:(1)四组被测试摩擦面的摩擦系数中,不锈钢板与PTFE板的最小,普通钢板与PTFE板的最大;(2)锂基润滑油和水对减小不锈钢板与PTFE板之间的静、动摩擦系数效果都十分明显,但锂基润滑油对摩擦系数的减小效果会随着油层被挤压变薄而逐渐减弱。该试验结果为该顶推滑移系统的摩擦面材料选择以及摩擦面润滑处理措施提供了重要参考依据。
To select a suitable material for the friction surface of an incremental launching slippage system of a prefabricated segment of a immersed tunnel, the static and dynamic friction coefficients of four material groups, i.e.,stainless steel plate-PTFE, stainless steel plate-NGE, ordinary steel plate-PTFE and ordinary steel plate-NGE,were tested. A 20 000 k N load-shearing test machine was used for the test utilizing the double-shear method.The test results indicate that: the friction coefficient of the combined stainless steel plate and PTFE plate is the smallest, and that of the combined ordinary steel plate and PTFE plate is the largest; and lithium-based lubricant and water have visible effects on reducing the static and dynamic friction between the stainless steel plate and PTFE plate, while the effect of lithium-based lubricant on friction reduction declines with the attenuation of the lubricant layer due to squeezing. The test results provide a significant reference for selecting material for the friction surface of incremental launching slippage systems, as well as for disposal measures for lubrication.
To select a suitable material for the friction surface of an incremental launching slippage system of a prefabricated segment of a immersed tunnel, the static and dynamic friction coefficients of four material groups, i.e.,stainless steel plate-PTFE, stainless steel plate-NGE, ordinary steel plate-PTFE and ordinary steel plate-NGE,were tested. A 20 000 k N load-shearing test machine was used for the test utilizing the double-shear method.The test results indicate that: the friction coefficient of the combined stainless steel plate and PTFE plate is the smallest, and that of the combined ordinary steel plate and PTFE plate is the largest; and lithium-based lubricant and water have visible effects on reducing the static and dynamic friction between the stainless steel plate and PTFE plate, while the effect of lithium-based lubricant on friction reduction declines with the attenuation of the lubricant layer due to squeezing. The test results provide a significant reference for selecting material for the friction surface of incremental launching slippage systems, as well as for disposal measures for lubrication.
引文
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[2]肖晓春.大型沉管隧道管节工厂化预制关键技术[J].隧道建设,2011,31(6):701-705Xiao Xiaochun.Key Technology for Manufactory Prefabrication of Tube Elements of Large-scale Immersed Tunnels[J].Tunnel Construction,2011,31(6):701-705
[3]蒋利学,陆伟杰.用原位双剪法检测砌体抗剪强度[J].工业建筑,2005,(S1):212~215Jiang Lixue,Lu Weijie.Testing the Shear Strength of Masonry by the Method of Double Shear in Situ on Brickwork Wall[J].Industrial Construction,2005,(S1):212-215
[4]郑文卿,陈瑶,袁道阳.断层摩擦系数及其演化定量研究的新途径[J].西北地震学报,2000,22(2):160-166Zheng Wenqing,Chen Yao,Yuan Daoyang.A New Way of Quantitative Study on the Fault Friction Coefficient and Its Evolution[J].Northwestern Seismological Journal,2000,22(2):160-166
[5]胡指南,张宏光,谢永利,等.超长沉管隧道大型模型试验设计与应用[J].现代隧道技术,2014,(6):123-129Hu Zhinan,Zhang Hongguan,Xie Yongli.The Design and Application of a Large-Scale Model Test for a Super-Long Immersed Tunnel[J].Modern Tunnelling Technology,2014,(6):123-129
[6]郭瑞,何川,苏宗贤,彭志忠.盾构隧道管片接头抗剪力学性能研究[J].现代隧道技术,2011,48(4):72-77Guo Rui,He Chuan,Su Zongxian,Peng Zhizhong.Study of Shearing Mechanical Properties of Segment Joints of Shield Tunnels[J].Modern Tunnelling Technology,2011,48(4):72-77
[7]王抒,张顶立,房倩.响应面分析法在隧道相似材料试验中的应用[J].现代隧道技术,2010,47(5):44-47Wang Shu,Zhang Dingli,Fang Qian.Application of Response Surface Analysis for Analogous Material Test in Tunneling[J].Modern Tunnelling Technology,2010,47(5):44-47
[8]魏纲,裘慧杰,丁智,等.海底沉管隧道施工引起的沉降实测与计算分析[J].现代隧道技术,2014,51(5):121-128Wei Gang,Qiu Huijie,Ding Zhi,et al.Measurements and Analysis of Settlement Caused by the Construction of an Undersea Immersed Tunnel[J].Modern Tunnelling Technology,2014,51(5):121-128
[9]王光辉.大型沉管隧道混凝土管段混凝土裂缝控制技术[J].现代隧道技术,2009,46(1):35-40Wang Guanghui.Cracks Control Technology for Concrete Tube Sections of Immersed tunnels[J].Modern Tunnelling Technology,2009,46(1):35-40
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