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.

摘要

修改后的摘要如下：作为一种新型的地下筒仓塑料防水系统，设计了三种聚丙烯塑料焊缝，并在泵压模式下进行了耐水压试验。研究了不同厚度、不同焊缝形式的失效模式、应力过程、失效机理及影响因素。与坡口焊试件相比，带焊接盖板的坡口焊缝试件的耐水压能力提高了约 40%~85%。与带焊接盖板的坡口焊试件相比，带粘贴和焊接盖板的坡口焊试件的耐水压能力提高了约 10%。地下筒仓的设计深度一般低于35m，