A new anti-floatation method by drainage：concept and application
CAO Hong1，2，PAN Hong1，2，LUO Guanyong1，2
(1. School of Civil Engineering and Transportation，South China University of Technology，Guangzhou，Guangdong 510640，China；2. State Key Laboratory of Subtropical Building Science，South China University of Technology，Guangzhou，Guangdong 510640，China)
Abstract：A sharp increase in the size of underground structures brings a great challenge to the anti-floatation design. A conventional passive method usually means a huge cost in finance and time. An efficient active method was thus proposed. The essential idea of the method is to reduce the water pressure by drainage and to control its environmental impact by cut-off walls(curtains). The application of the method in a practical case was addressed in details with the emphasis on how to make the drainage system reliable and maintainable. The drainage system has been on service over seven years successfully. It was found that a large diameter relief well made of pervious concrete was not clogged and easy maintainable. A stratum with a strong permeable soil layer is a favorable condition for the proposed method because the environmental impact can be controlled easily. In this case，the method should be first choosed.
曹 洪1，2，潘 泓1，2，骆冠勇1，2. 地下结构截排减压抗浮概念及应用[J]. 岩石力学与工程学报, 2016, 35(12): 2542-2548.
CAO Hong1，2，PAN Hong1，2，LUO Guanyong1，2. A new anti-floatation method by drainage：concept and application. , 2016, 35(12): 2542-2548.
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2016, Vol. 35 
