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Renovating of existing manholes for earthquake resistance

Taishin Ippatu-kun

The connection between existing manhole and pipe is reinforced for earthquake-resistant without excavation.

This methos is also for reinforcement to sewerage facility's joint. Cut the tip of pipe, and fit seismic rubber ring with elasticity and watertightness to it.
After fitting it to tip of upstream and downstream we can also install renovated pipe by INS or EX method for more reinforcing earthquake resistant.