Experimental study on resisted water pressure for connecting welds of polypropylene plastic plates in underground silos

Abstract

The revised abstract is as follows:As a new waterproof system with plastic in underground silos, three kinds of polypropylene plastic welds were designed and subjected to a water-pressure resistance test in pump-pressure mode. The failure modes, stress processes, failure mechanisms, and influencing factors of different weld forms with different thicknesses were studied. The water-pressure resistance on the groove-weld specimens with welded cover plates was increased by approximately 40%-85% compared with that of the groove-weld specimens. The water-pressure resistance for groove-weld specimens with pasted and welded cover plates was increased by approximately 10% compared with that of the groove-weld specimens with welded cover plates. The depth of the designed underground silos is generally lower than 35 m, and the 8-mm plate thickness and groove-weld specimens with welded cover plate combination can resist 58.16 m of water pressure with a recommended safety factor of 1.66.

Experimental and Numerical Investigation of Plastic–Concrete Waterproof Walls of an Underground Granary Subject to Combined Bending Moment and Water Pressure

“…Polypropylene plastic is waterproof, corrosion-resistant, easy to construct, non-toxic and harmless [14], and meets food storage standards. In [15], the authors presented a plastic-concrete waterproof system with polypropylene plastic (PP) as the lining material. The waterproof system integrated the construction of the structure and ensured it was waterproof, and solved the problems associated with the difficulty in repairing the waterproof roll material and coating construction in the reinforced concrete structure.…”