Hydrostatic test of polypropylene lined components based on 400 mm stud spacing

In order to solve the problem of water-proof and moisture-proof underground granary,a 10 mm thick polypropylene plastic plate was selected,which was lined with 400 mm plastic studs in the granary to form a waterproof member,and the member was subjected to a hydraulic test to study its mechamical performance under water pressure. The results showed that:At a stud spacing of 400 mm,the weld failure occured when the hydraulic bearing capacity of the plastic lining reached 38 kPa,pressure droped to 18 kPa;When the load continued to 26 kPa,the stud wire slipping failure occured,pressure droped to 17 kPa;The final load reached 26 kPa when the plastic plate was broken. Under the action of water pressure,the mid-span displacement of the four nodes of the waterproof plastic plate increased with the increase of water pressure.The maximum displacement was 12. 82 mm,and the displacement at the nodes changed little,and the maximum value was 0. 74 mm;the stress at the nodes in the plastic plate was larger,the stress of the