マンホール際管路の沈下挙動実験と対策管路の開発

抄録

Damages on buried pipelines connected to structures such as manholes and buildings are not uncommon due to differential ground settlement along the direction of pipeline stretches. First, we obtained fundamental data of the mechanical behavior of a buried UPVC (Unplasticized Poly Vinyl Chloride) pipeline jointed to a manhole when it was subjected to uneven ground settlement using Sinking Soil Box. Experimental results were then compared with the theoretical ones obtained by non-linear analyses using transfer matrix method. Both results were in good agreements. Next, the same experiments were carried out for a developed pipeline as a countermeasure for large ground settlements. The developed UPVC pipeline system may stand up to 45cm of ground settlement, while ordinary pipeline system may yield to not less than 15cm of ground settlement.