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真空轻型井点降水在深埋隧道未成岩富水粉细砂层施工中的应用
引用本文:王菀,蒋永强,张文新,陈天恩.真空轻型井点降水在深埋隧道未成岩富水粉细砂层施工中的应用[J].国防交通工程与技术,2012(4):57-60,77.
作者姓名:王菀  蒋永强  张文新  陈天恩
作者单位:中铁隧道集团有限公司技术中心,河南洛阳471009
摘    要:真空轻型井点降水在基坑和浅埋隧道施工中应用较多,但很少在深埋隧道中应用,对其降水效果也难以判断。依托兰渝铁路桃树坪隧道洞内降水工程,通过降水管如何设计与施工对真空轻型井点在洞内降水进行了研究。实践证明轻型井点降水在深埋隧道能够达到无水施工的效果,保证了隧道开挖过程中的砂层自稳,并对后续施工提出了改进建议。对类似工程具有参考意义。

关 键 词:深埋隧道  未成岩富水粉细砂层  真空轻型井点降水

The Application of the Vacuum Light-Duty Well Point Dewatering Method to the Construction of I)ccp Tunnels in Non-Rocky, Water-Rich,Silty Sand Stratum
Wang Wan,Jiang Yongqiang,Zhang Wenxin,Chen Tianen.The Application of the Vacuum Light-Duty Well Point Dewatering Method to the Construction of I)ccp Tunnels in Non-Rocky, Water-Rich,Silty Sand Stratum[J].Traffic Engineering and Technology for National Defence,2012(4):57-60,77.
Authors:Wang Wan  Jiang Yongqiang  Zhang Wenxin  Chen Tianen
Institution:(The Technical Center of the Tunnel Group Co. Ltd. of the Railway Ministry of China,Luoyang 471009,China)
Abstract:The vacuum light-duty well point dewatering method is widely applied to the construction of foundation pits and shal- low-buried tunnels,but rarely applied to the construction of deep-buried tunnels, in which case lhe dewatering effect of the method is hard to estimate. Based on the dewatering project of the Taoshuping Tunnel of the Lanzhou-Chongqing Railway, a study is made,in the paper, of the effects of the vacuum light-duty well point dewatering method inside tunnels in regard to how to design and build the dewatering pipes,the result of which shows that by means of the vacuum light-duty well point dewate- ring method, the waterless construction inside deep-buried tunnels can be realized and the stability of the sandy stratum can be ensured during excavation. Some post-excavation construction advice for improvement is also proposed. The paper may serve as a useful reference for other similar projects in the future.
Keywords:deep-buried tunnel  non-rocky  water-rich  silty sand stratum  vacuum light-duty well pc4nt dewatering method
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