Abstract Aiming at the channeling water caused by local damage of smooth waterproof board and disadvantage in terms of leakage treatment, it systematically studies the performance of anti-stripping, repeated stripping-bonding and channeling water resistance of the self-adhesive waterproof board by a performance test, and discusses the construction techniques and welding methods. The results show that the self-adhesive glue of waterproof board has selfhealing effect and strong stain-resistant ability, thus the waterproof board can be stripped and bonded with poured concrete for many times, and the anti-stripping strength increases with the increase of concrete strength; the bearing capacity of the waterproof board fixed by nail and hot-melt gasket is much larger than the dead weight of unit area waterproof board, effective fixation is obtained with no effect from the subsequent construction, welding by climbing welder and direct bonding technology can be used for overlapping of water board; as for the full-scale simulation and practical engineering test of pressurized water injection, the water pressure is up to 1.3 MPa and no track of channeling water of the core sample is observed at the position fixed by nail, which means the self-adhesive waterproof board is well bonded with the secondary lining concrete and it has good channeling resistance and advantage for later treatment of tunnel disease.
Abstract：
Aiming at the channeling water caused by local damage of smooth waterproof board and disadvantage in terms of leakage treatment, it systematically studies the performance of anti-stripping, repeated stripping-bonding and channeling water resistance of the self-adhesive waterproof board by a performance test, and discusses the construction techniques and welding methods. The results show that the self-adhesive glue of waterproof board has selfhealing effect and strong stain-resistant ability, thus the waterproof board can be stripped and bonded with poured concrete for many times, and the anti-stripping strength increases with the increase of concrete strength; the bearing capacity of the waterproof board fixed by nail and hot-melt gasket is much larger than the dead weight of unit area waterproof board, effective fixation is obtained with no effect from the subsequent construction, welding by climbing welder and direct bonding technology can be used for overlapping of water board; as for the full-scale simulation and practical engineering test of pressurized water injection, the water pressure is up to 1.3 MPa and no track of channeling water of the core sample is observed at the position fixed by nail, which means the self-adhesive waterproof board is well bonded with the secondary lining concrete and it has good channeling resistance and advantage for later treatment of tunnel disease.
WANG Tao ZHU Hequan DU Cunshan JIA Hengqiong
.Experimental Study on Performance of the Self-adhesive Tunnel Waterproof Board[J] MODERN TUNNELLING TECHNOLOGY, 2020,V57(3): 193-198
2020, Vol. 57 