越江盾构隧道纵向变形曲率与管环渗漏的关系
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摘要
分析了三次样条插值法在越江隧道纵向变形曲线拟合中的适用性与计算方法,应用三次样条插值对越江盾构隧道纵向变形曲线进行了拟合,并通过曲线拟合方程计算了隧道全长纵向的变形曲率.应用越江隧道纵向结构分析模型计算了隧道不同纵向变形临界状态下的纵向变形曲率与环缝张开量的关系,并通过与越江隧道渗漏现场检测结果的分析对比,对越江隧道纵向变形曲率与管环渗漏间的相关性进行了评价.研究表明:与地铁隧道相比,越江隧道曲率半径的限值要求可适当放宽.越江隧道纵向变形曲率半径小于2407.1m、环缝张开量大于3 mm时,隧道发生渗漏的概率较大.越江隧道纵向变形曲率半径小于1256.8 m、环缝张开量大于6mm时,环缝密封止水措施失效,隧道可能会出现较严重的渗水漏泥现象.
Applicability and calculation method of cubic spline interpolation in longitudinal deformation curve fitting of cross-river shield tunnel were analyzed,and longitudinal deformation curve of cross-river shield tunnel was fitted by using cubic spline interpolation method,and longitudial deformation curvature of whole tunnel was calculated by curve fitting equation.Based on longitudinal structure analysis model of cross-river tunnel,relationship under different critical states between longitudinal deformation curvature and circular seam stretching-amount was built.Correlation between longitudinal deformation curvature of cross-river tunnel and circular seam leakage was evaluated,by comparing leakage detection results of cross-river tunnel on site.The results show that critical curvature radius value of cross-river shield tunnel is smaller than metro shield tunnel.When longitudinal deformation curvature radius of cross-river tunnel is less than 2407.1m and its circular seam stretching-amount is more than 3mm,the probability that leakage occurs to the circular seam is relatively high.When longitudinal deformation curvature radius of cross-river tunnel is less than 1 256.8m and its circular seam stretching-amount is more than 6 mm,water sealing measures of circular seam is invalid,and serious leakage may appear in tunnel.
Applicability and calculation method of cubic spline interpolation in longitudinal deformation curve fitting of cross-river shield tunnel were analyzed,and longitudinal deformation curve of cross-river shield tunnel was fitted by using cubic spline interpolation method,and longitudial deformation curvature of whole tunnel was calculated by curve fitting equation.Based on longitudinal structure analysis model of cross-river tunnel,relationship under different critical states between longitudinal deformation curvature and circular seam stretching-amount was built.Correlation between longitudinal deformation curvature of cross-river tunnel and circular seam leakage was evaluated,by comparing leakage detection results of cross-river tunnel on site.The results show that critical curvature radius value of cross-river shield tunnel is smaller than metro shield tunnel.When longitudinal deformation curvature radius of cross-river tunnel is less than 2407.1m and its circular seam stretching-amount is more than 3mm,the probability that leakage occurs to the circular seam is relatively high.When longitudinal deformation curvature radius of cross-river tunnel is less than 1 256.8m and its circular seam stretching-amount is more than 6 mm,water sealing measures of circular seam is invalid,and serious leakage may appear in tunnel.
引文
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[10]黄宏伟,徐凌,严佳梁,等.盾构隧道横向刚度有效率研究[J].岩土工程学报,2006,28(1):11.HUANG Hongwei,XU Ling,YAN Jialiang,et al.Study ontransverse effective rigidity ratio of shield tunnels[J].ChineseJournal of Geotechnical Engineering,2006,28(1):11.
[2]林永国,廖少明,刘国彬.地铁隧道纵向变形影响因素的探讨[J].地下空间,2000,20(4):264.LIN Yongguo,LIAO Shaoming,LIU Guobin.A discussion ofthe factors effecting on longitudinal deformation of subwaytunnel[J].Underground Space,2000,20(4):264.
[3]朱合华,陶履彬.盾构隧道衬砌结构受力分析的梁-弹簧系统模型[J].岩土力学,1998,19(2):26.ZHU Hehua,TAO Lubin.Study on two beam-spring modelsfor the numerical analysis of segments in shield tunnel[J].Rock and Soil Mechanics,1998,19(2):26.
[4]志波由纪夫,川島一彦.シ?ルドトソネルの耐震解析に用いる長手方向覆土剛性の評價法[C]∥土木学会論文集.东京:[s.n.],1988,319-327.Shiba Y,Kawashima T.The evaluation of the duct'slongitudinal rigidity in the seismic analysis of shield tunnel[C]∥Proceedings of the Civil Academy.Tokyo:[s.n.],1988,319-327.
[5]志波由纪夫,川島一彦.?答変位法によるシ?ルドトソネルの地震时断面力の算定法[C]∥土木学会論文集.东京:[s.n.],1989,385-394.Shiba Y,Kawashima T.Calculation of internal force ofstructure during earthquake using response displacementmethod[C]∥Proceedings of the Civil Academy.Tokyo:[s.n.],1989,385-394.
[6]林永国.地铁隧道纵向变形结构性能研究[D].上海:同济大学地下建筑与工程系,2001.LIN Yongguo.Longitudinal deformation structuralperformance study of metro tunnel[D].Shanghai:TongjiUniversity.Department of Geotechnical Engineering,2001.
[7]廖少明.圆形隧道纵向剪切传递效应研究[D].上海:同济大学地下建筑与工程系,2002.LIAO Shaoming.Longitudinal shear transfer effects study ofshield tunnel[D].Shanghai:Tongji University.Department ofGeotechnical Engineering,2002.
[8]徐凌.软土盾构隧道纵向沉降研究[D].上海:同济大学地下建筑与工程系,2005.XU Ling.Longitudinal settelment study of shield tunnel in softsoil[D].Shanghai:Tongji University.Department ofGeotechnical Engineering,2005.
[9]郑永来,韩文星,童琪华,等.软土地铁隧道纵向不均匀沉降导致的管片接头环缝开裂研究[J].岩石力学与工程学报,2005,24(24):4552.ZHENG Yonglai,HAN Wenxing,TONG Qihua,et.al.Studyon longitudinal crack of shield tunnel segment joint due toasymmetric settlement in soft soil[J].Chinese Journal of RockMechanics and Engineering,2005,24(24):4552.
[10]黄宏伟,徐凌,严佳梁,等.盾构隧道横向刚度有效率研究[J].岩土工程学报,2006,28(1):11.HUANG Hongwei,XU Ling,YAN Jialiang,et al.Study ontransverse effective rigidity ratio of shield tunnels[J].ChineseJournal of Geotechnical Engineering,2006,28(1):11.
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