The simplest way to prevent rainwater leakage is to add another waterproof layer, that is, to coat it with waterproof film and asphalt. In addition, there are the following methods.

Flat concrete

When pouring slab concrete, it should be carried out from low to high according to the slope of slab, and collision between reinforcement and formwork should be avoided when vibrating.

Permeable material

After bridge end transition slab stepped down, the filling materials should be mainly water-permeable materials, and compacted by layers.

Strictly control the expansion gap.

Strictly control the telescopic gap between the comb teeth, and the positioning device of the telescopic gap must be dismantled in time to ensure that the telescopic device can freely expand and contract due to temperature changes, and ensure that the telescopic gap is not less than 5mm at the highest temperature.

erect barriers

After the joint is opened, bamboo must be used to set obstacles or warning signs to prevent vehicles or pedestrians from falling into the expansion joint.

The curing period is not less than 7 days.

Immediately after the initial setting of concrete, cover it with geotextile and spray water for curing. The curing period is not less than 7 days.