| 摘要 |
<p>PURPOSE:To prevent a catch basin or the like from deformation or damage caused by the sink of a vertically buried underground pipe due to the sinkage of a foundation in the case of building a sewerage system or the like. CONSTITUTION:After a coating member 9 consisting of a synthetic resin film or the like is temporarily fixed on the outer peripheral part of an underground pipe 2 vertically buried, the underground pipe 2 is buried in the earth and sand 10. The coating member 9 is prevented from being sunk along the underground pipe 2 together with the earth and sand 10 so that the underground pipe 2 is affected by a load of the earth and sand 10 when the earth and sand 10 are sunk due to defective backfilling or the like.</p> |
