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防水屋面材料
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聚丙烯塑料坡口焊缝在承受地下水压荷载下的相

作者：张瑞元，王振清，席达

关键字：聚丙烯,塑料,坡口,焊缝,在,承受,地下,水压,

　
（河南工业大学 土木建筑学院，河南 郑州  450001）
摘要：研究坡口焊形式焊缝的聚丙烯塑料用于地下工程防水结构，旨在探索塑料焊缝承受水压荷载与结构内力之间的计算数学关系。结果表明，抗水压破坏应力σf与理论本构应力σv存在σf·β≤σv的关系，其中β为关系系数因子，这一结论为聚丙烯塑料用于内衬防水工程中提供方法和思路，同时为工程设计提供参考数据。
关键词：地下工程；防水材料；聚丙烯塑料；抗水压荷载；焊缝
中图分类号：TU57+3        文献标识码：A        文章编号：1001-702X（2019）06-0110-04
 
Study on the correlation calculation relationship of polypropylene plastics groove weld under ground water pressure load
ZHANG Ruiyuan，WANG Zhenqing，XI Da
（College of Civil Architecture，Henan University of Technology，Zhengzhou 450001，China）
Abstract：The waterproofing structure used in underground engineering of polypropylene weld seam with groove welding is studied. The purpose of this paper is to explore the computational mathematical relationship between hydraulic load and internal force of plastic weld. Studies have shown that water pressure failure stress σf and theoretical constitutive stress σv have the following relationships：σf·β≤σv，where β is the factor of relation coefficient. This conclusion provides the method and idea for the application of polypropylene plastic weld in lining waterproof engineering，and also provides reference data for engineering design. 
Key words：underground engineering，waterproof material，polypropylene plastics，hydraulic load，weld seam