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深埋隧道外水压力计算的解析-数值法
引用本文:王建秀, 杨立中, 何静. 深埋隧道外水压力计算的解析-数值法[J]. 水文地质工程地质, 2002, (3): 17-19,28. doi: 10.3969/j.issn.1000-3665.2002.03.005
作者姓名:王建秀  杨立中  何静
作者单位:西南交通大学土木工程学院,成都,610031;; 贵州地质工程勘察院,贵阳,550008;; 西南交通大学;; 贵州地质工程勘察院
基金项目:国家自然科学基金项目 ( 4 9872 0 82 )
摘    要:在高水头富水区,抗水压衬砌设计的关键在于外水压力的计算。深埋隧道排水时,沿轴线方向上流入隧道的水量来自于隧道掌子面的前方,当隧道施工足够长度后,可以认为已施工断面的地下水只从隧道两侧向断面内运动,此时可将三维问题处理为二维。对于深埋隧道,当其断面远小于水头时,可处理为一个点井;隧道全断面排水时,隧道断面线可处理为定流量边界。首先建立隧道排水的水文地质概念模型,采用经验解析法预测隧道的涌水量,然后将涌水量代入隧道围岩渗流的剖面二维模型,模拟隧道排水时围岩渗流场的分布,再采用作用系数的方法计算出隧道衬砌的外水压力。

关 键 词:深埋隧道   外水压力   涌水量   解析-数值法
文章编号:1000-3665(2002)03-0017-03

The simulation of deep tunnel external water pressure by analytical-numerical method
The simulation of deep tunnel external water pressure by analytical-numerical method[J]. Hydrogeology & Engineering Geology, 2002, (3): 17-19,28. doi: 10.3969/j.issn.1000-3665.2002.03.005
Authors:WANG Jian|xiu+  YANG Li|zhong+  HE Jing+
Affiliation:WANG Jian|xiu+1,YANG Li|zhong+1,HE Jing+2
Abstract:The correctly design of tunnel lining, in the area with high groundwater table, lies in the accurate calculation of external water pressure. When a tunnel is excavated to a certain length, the groundwater drained from the aquifer ahead of tunnel face can be ignored, and the 3D|seepage problem can be simplified to 2D|one. If a deep tunnel's dimension in section is far less than water head, the deep tunnel can be regarded as a horizontal point well. The blow of a deep tunnel can be calculated by analytical method. Taking the outflow rate into seepage's mathematical model, water head of a deep tunnel's aquifer in section can be obtained by numerical method. Then the external water pressure can be obtained by the coefficient according to the water table simulated above.
Keywords:deep tunnel  external water pressure  outflow rate  analytical|numerical method
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