Detachable waterstop is a type of rubber waterstop with a semi-circular or circular flat structure on both sides. The semi-circular structure in the middle is designed to provide good tension and compression when the expansion joint deforms. The key point is that these two flat plates are not poured into the concrete, but are installed on the surface of the concrete after the concrete construction is completed by installing expansion bolts and steel plates through slots.
The joints between the culvert bodies are generally made of detachable water stop expansion joints. During the construction process, a set of installation and construction methods for detachable water stop expansion joints are formed through the installation technology of pressure plate water stop expansion joints.
The installation method of detachable water stop expansion joint is characterized by using adhesive steel type building structural adhesive and water stop pressure block to fix the rubber water stop strip. On the one hand, it flattens the local unevenness, and on the other hand, it enhances the adhesion between the water stop strip and the steel pressure plate on the non fastening surface, solving the problem of uneven tightening force and uneven fastening surface affecting the water stop effect of the water stop strip. At the same time, it absorbs the joint displacement without generating large stress in the water stop strip, greatly improving the water stop ability of the detachable rubber water stop strip along the way.
The installation process principle of detachable water stop expansion joints is to install steel plates and fixing bolts in advance, and embed them in the freshly poured concrete; Before installing the waterstop, treat the concrete defects under the steel plate, then treat the surface of the steel plate, and finally install the waterstop; Finally, the rubber waterstop was fixed with a waterstop pressure block, and the rubber panel was pasted on the surface of the waterstop pressure block, which greatly improved the waterstop effect and extended the service life of the waterstop. The installation method of detachable rubber waterstop expansion joints is widely applicable to the installation of water expansion joints in water conveyance projects, dam culverts, civil air defense works, basement and parking lot projects of high-rise buildings.
