Method of applying a self-adhesive waterproof membrane to an external wall and base slab of an underground construction

Abstract

A method for applying a self-adhesive waterproof membrane to an external wall and base slab of an underground construction prior to the casting work includes applying a concrete layer on a working site and a protective layer on a diaphragm wall or retaining wall of the external wall, applying a rubbery asphalt waterproof membrane on the concrete layer and the outside of the protective layer. A rubbery asphalt layer of the membrane is facing directly to the underground structural body. A step of applying a protection concrete on the membrane that is applied on the concrete layer is added after the rubbery asphalt membrane applied step. Then, applying a steel frame or reinforcing steel to adjacent membrane and a formwork to an inner face of the external wall is added. Finally, pouring concrete to a space defined by the external wall and the formwork to allow direct contact of the rubbery asphalt of the membrane to the protection concrete and the concrete; and curing the concrete for around 7˜14 days to allow secure engagement of the waterproof membrane to the base slab and the external wall by capillarity induced by the solidfying process of the concrete so as to completely form a plant-root like waterproof layer to the concrete are added to complete the process.

Dependencies are inferred from the claim text.