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中文摘要：
随着地下结构的变大变深,常规的抗浮方法往往导致经济和时间成本大增。结合实际工程,介绍一种以“排”为主的利用排水廊道进行坡地地下结构抗浮的方法。方法核心是通过在地下结构周边设置排水廊道降低设计水位,减小作用在结构底板上的水荷载,难点在于保证排水廊道长期运行可靠性和控制降水对周边环境的影响。详细介绍排水廊道减压系统的特点,设计应着重注意的问题、分析方法以及计算结果与实测结果的比较。该方法不但具有一般排水减压法经济效益显著,不影响工期的特点外,同时还具有以下3个特点：一是能充分利用坡地地形的特点实现廊道内的渗水自排,减少运行成本;二是廊道可进入,易于维修,其长期运行的可靠性易于保证;三是排水设施与主体结构相互独立,对主体结构的干扰小。
英文摘要：
The sharp increase in size of underground structures brings great challenge to the anti-floating design. An ordinary passive scheme usually means a huge cost financially and timewise. A new active anti-floating method together with a case of application is presented. The method is to reduce the water pressure acting on the underground structures by draining the water out with a drainage corridor around the underground structure. The critical problem of the method is how to design the drainage system with the good long-term performance and how to control the environmental impact caused by the drainage. The characteristics of the drainage corridor, the factors involved deeply in design, the analysis method and the case monitoring data were discussed in detail. The proposed method has an overwhelming advantage in finance and time over the ordinary anti-floating method.
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