How to deal with water inflow from deformation joints at the bottom of highway tunnels

Chisel off - Chisel off the asphalt concrete surface layer on the upper part of the deformation joint, and the width of the asphalt surface layer should be expanded by 1 meter from the center of the deformation joint. Chisel off the concrete pavement layer to the depth of the original structural concrete layer.

Grouting seal - drill holes at the side of the deformation joint for grouting with a depth of 600mm and a spacing of 500mm. Install grouting needles and inject polyurethane through the holes to form gel. Fill the water gap in the dense deformation joint, instantly stop the water, and provide elastic sealing for the deformation joint.

Curtain grouting - drill holes and grout in the center of the deformation joint, penetrate the structure to the cushion layer, and inject CG-P205 high elasticity water-soluble polyurethane leak sealing grouting material. Through grouting, a whole plastic waterproof belt is formed on the outside of the structure.

Trimming equal width joints - chiseling and trimming deformation joints. First, chisel a groove with a depth of 100mm and a width of 100mm, and use high-strength concrete repair materials to trim the groove into equal width joints with a width of 20mm. Reserve grouting holes.

Fill waterproof coating in equal width joints - Fill non curing rubber asphalt waterproof coating in equal width joints.

Embedding special rubber profiles - embedding special rubber profiles in equal width seams and compressing and sealing them.

Grouting - Inject non curing rubber asphalt waterproof coating onto the surface of rubber profiles through reserved grouting holes.