This paper reports the evaluation method of the waterproofing system for underground structure applied on earth retaining walls prior to concrete casting. The most important part for evaluating waterproofing properties of this system is a penetrated part through waterproofing, or a damaged part of waterproofing. For the penetrated part, the specimen of this system should be made of concrete casting vertically. For the damaged part, the specimen should be made of concrete using tall frame and casting vertically, or using small frame and rotating to accelerate bleeding. Then waterproofing property of this system is evaluated by pressurizing permeability test.
