基于优势面理论的隧道控水与模拟分析
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摘要
利用优势面理论对断层导水进行分析,并结合降雨渗流的条件进行了数值模拟。探讨了特定条件下围岩中渗流场的分布规律,模拟了改变围岩注浆圈的厚度和渗透系数的大小对涌水量的影响。结果表明,改变注浆圈的厚度对涌水量影响小,注浆圈渗透系数影响很大,而且在断层处产生汇水作用,控制注浆圈渗透系数在10-8m/s以下可以有效地防水。该控水理论可以为隧道水害的预测与治理提供新思路。
Preferred plane theory is used to analyze fault to lead water;and numerical simulation of seepage for rainfall infiltration is employed to explore distribution of seepage field of surrounding rock under extra condition.It is simulated that water volume is changed with the value of the coverage and permeability index of grouted surrounding rock to control leakage volume.The results show that grouted coverage not almost influenced on result while permeability index largely influenced on it;and it is found that fault has an accumulating water role.As if permeability index of grouting surrounding rock is controlled lower than 10-8 m/s,the effect of waterproofing can meet the need of construction and use of the tunnel.The conclusion can present a new idea to predict and cure flood of tunnel.
Preferred plane theory is used to analyze fault to lead water;and numerical simulation of seepage for rainfall infiltration is employed to explore distribution of seepage field of surrounding rock under extra condition.It is simulated that water volume is changed with the value of the coverage and permeability index of grouted surrounding rock to control leakage volume.The results show that grouted coverage not almost influenced on result while permeability index largely influenced on it;and it is found that fault has an accumulating water role.As if permeability index of grouting surrounding rock is controlled lower than 10-8 m/s,the effect of waterproofing can meet the need of construction and use of the tunnel.The conclusion can present a new idea to predict and cure flood of tunnel.
引文
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[6]汤劲松,童立元.低山丘陵区复杂地质条件下浅埋大跨公路隧道施工过程安全稳定分析研究[R].[S.l.]:[s.n.],2007.
[7]JTG D70-2004公路隧道设计规范[S].
[8]REITSMA S,KUEPER B H.Laboratory measurement of capillary pressure saturation relationships in a rock fracture[J].Water Resources Research,1994,30(4):865-878.
[9]李亮,杜修力.流体饱和两相多孔介质动力反应计算分析[J].岩土力学,2008,29(1):113-118.LI Liang,DU Xiu-li.Calculation and analysis of dynamic response of fluid-saturated porous media[J].Rock and Soil Mechanics,2008,29(1):113-118.
[10]SALAM A A,CHRYSIKOPOULOS C V.Unsaturated flow in a quasi three dimensional fractured medium with spatially variable aperture[J].Water Resources Research,1996,32(6):1531-1540.
[11]汤有光,郭轶锋.考虑地表径流与地下渗流耦合的斜坡降雨入渗研究[J].岩土力学,2004,25(9):1347-1352.TANG You-guang,GUO Yi-feng.A preliminary study of rainfall infiltration on slope using a new coupled surface and subsurface flow model[J].Rock and Soil Mechanics,2004,25(9):1347-1352.
[2]谷德振.谷德振文集[M].北京:地质出版社,1994.
[3]杜时贵.岩体结构面的工程性质[M].北京:地震出版社,1999.
[4]谭心,陈善雄,杨明.降雨条件下土坡饱和非饱和渗流分析[J].岩土力学,2003,24(3):381-384.TAN Xin,CHEN Shan-xiong,YANG Ming.Saturated-unsaturated seepage analysis of slope under rainfall[J].Rock and Soil Mechanics,2003,24(3):381-384..
[5]吴宏伟,陈守义,庞宇威.雨水入渗对非饱和土坡稳定性影响的参数研究[J].岩土力学,1999,20(1):1-14.WU Hong-wei,CHEN Shou-yi,PANG Yue-wei.Parametric study of effects of rain infiltration on unsaturated slopes[J].Rock and Soil Mechanics,1999,20(1):1-14.
[6]汤劲松,童立元.低山丘陵区复杂地质条件下浅埋大跨公路隧道施工过程安全稳定分析研究[R].[S.l.]:[s.n.],2007.
[7]JTG D70-2004公路隧道设计规范[S].
[8]REITSMA S,KUEPER B H.Laboratory measurement of capillary pressure saturation relationships in a rock fracture[J].Water Resources Research,1994,30(4):865-878.
[9]李亮,杜修力.流体饱和两相多孔介质动力反应计算分析[J].岩土力学,2008,29(1):113-118.LI Liang,DU Xiu-li.Calculation and analysis of dynamic response of fluid-saturated porous media[J].Rock and Soil Mechanics,2008,29(1):113-118.
[10]SALAM A A,CHRYSIKOPOULOS C V.Unsaturated flow in a quasi three dimensional fractured medium with spatially variable aperture[J].Water Resources Research,1996,32(6):1531-1540.
[11]汤有光,郭轶锋.考虑地表径流与地下渗流耦合的斜坡降雨入渗研究[J].岩土力学,2004,25(9):1347-1352.TANG You-guang,GUO Yi-feng.A preliminary study of rainfall infiltration on slope using a new coupled surface and subsurface flow model[J].Rock and Soil Mechanics,2004,25(9):1347-1352.
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