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Discussion on Waterproofing in Tunneling

Wang jianyu Hu Yuanfang (Southwest Research Institute of CREC, Chengdu 610031)  
On base of discussion on water drainage and water proofing two main approaches on ground water treatment, "full proofing mode" and "grouting +drainage mode" are suggested in this paper in scope of environment protection. And solutions on some key problems such as water pressure calculation, engineering quality controlling arc presented as well.
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