Adhesive Waterproof Sheeting for Preventing Water Leakage into Underground Structures

摘要

In subway construction works, underground concrete structures in stations, or sections under a thin overburden layer, are built by the cut-and-cover tunneling method. With those underground structures, damage to various facilities inside the structures caused by the leakage of water, or the extra costs required to prevent water leakage, can become a problem. As a measure to prevent the leakage of water into an underground concrete structure, the pre-waterproofing method is used, in which waterproof sheeting or some other suitable covering is applied to the earth-retaining walls before construction of the structure (Fig. 1). However, even with this method, it is difficult to prevent the leakage of water completely.