| 深埋隧道外水压力计算的解析-数值法 |
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| 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,2002,29(3):17-19,28. |
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| 作者姓名： | 王建秀 杨立中 何静 |
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| 作者单位： | 1. 西南交通大学土木工程学院,成都,610031
2. 贵州地质工程勘察院,贵阳,550008 |
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| 基金项目： | 国家自然科学基金项目 ( 4 9872 0 82 ) |
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| 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，采和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。
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| 关 键 词： | 水文地质概念模型 经验解析法 深埋隧道 外水压力 涌水量 解析－数值法 地下水 |
| 文章编号： | 1000-3665(2002)03-0017-03 |
The simulation of deep tunnel external water pressure by analytical-numerical method |
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| WANG Jian\|xiu\,YANG Li\|zhong\,HE Jing\.The simulation of deep tunnel external water pressure by analytical-numerical method[J].Hydrogeology and Engineering Geology,2002,29(3):17-19,28. |
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| Authors: | WANG Jian\|xiu\ YANG Li\|zhong\ HE Jing\ |
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| Institution: | WANG Jian\|xiu\+1,YANG Li\|zhong\+1,HE Jing\+2 |
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| 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. |
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| Keywords: | deep tunnel external water pressure outflow rate analytical\|numerical method |
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