waterproof board meaning in English

防水纸板

Based on continuous porous medium seepage model , it is assumed that if waterproofing board of complex lining is perfect , the secondary lining is leakproof , thus the formula of external water load on secondary lining with a grouting loop is deduced
以连续孔隙介质渗流模型为基础，假定复合衬砌中防水板施工完好二次衬砌是封闭阻水情况，推导出了有注浆堵水圈的隧道衬砌结构外水荷载计算公式。
Key issues including water plugging types , waterproof board spreading methods , drop of external water pressure and lining design for resisting hydraulic pressure , etc . were studied , thus the composite waterproof and drainage system to control drainage were put forward , including grouting sphere for water plugging , primary support , grid sysytem for waterproof and drainage and lining to resist hydraulic pressure
重点就堵水方式、防水板铺挂形式、外水压力的折减以及抗水压衬砌设计等技术问题进行了研究，提出了可通过注浆堵水圈、初期支护、防排水网格和抗水压衬砌形成综合防排水体系，它可以达到控制排放的目的。