Analysis and research of the buried U-PVC pipe of the water supply function

The anti-seismic characters of earthing U-PVC supply pipeline is analysed by the pull-off test of flexible joint static-load on the earthing U-PVC supply pipeline. Under the condition of earthing, the test of tensile static-load is going through five pipes 200mm dia., which is connected with cushion rubber, meanwhile, five displacement conditions have been done on each pipe. According to the test data of the pressure and the displacement, a relative curve about pressure-displacement has been accepted and its formula has been formed. Under the relationship between leakage-amount and the time on each condition, a leakage model is built. The analysis suggests that such a tube of flow can be used as an available model only when the supply pipe net with leakage is analysed. The formula about hydraulic pressure to displacement at the interface provides the reference information for the anti-seismic design of the supply pipeline.