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首页> 外文会议>Eighth International Conference on Tailings and Mine Waste '01, Jan 16-19, 2001, Fort Collins, Colorado, USA >Tensile stresses and the durability of PE pipes
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Tensile stresses and the durability of PE pipes

机译：PE管的拉伸应力和耐久性

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摘要

Polyethylene (PE) drainage pipes are extensively used in tailings and mine waste applications because of their excellent resistance to chemical degradation, relative ease of construction and overall good performance. Limiting the long term tensile stresses in PE pipes is necessary to obtain adequate long term durability. If tensile stresses are too large and in the presence of a flaw or defect, PE pipes may be susceptible to stress cracking-a brittle failure occurring at stresses well below yield. The tensile stresses that may occur in tailings and mine waste applications are discussed. Results from analytical solutions, large-scale laboratory tests and numerical analyses are presented to provide a measure of the tensile stresses from large earth pressures, coarse backfill materials, and perforations. Sources of flaws or defects in PE pipes are also described. Recommendations are given for design and construction procedures that promote greater durability of polyethylene pipes.
机译：聚乙烯（PE）排水管因其优异的抗化学降解性，相对易施工性和总体良好性能而广泛用于尾矿和矿山废物应用中。要获得足够的长期耐久性，必须限制PE管中的长期拉伸应力。如果拉应力太大，并且存在瑕疵或缺陷，则PE管可能容易出现应力开裂-在远低于屈服的应力下会发生脆性破坏。讨论了在尾矿和矿山废料应用中可能出现的拉应力。提出了分析解决方案，大规模实验室测试和数值分析的结果，以测量大土压力，粗糙的回填材料和穿孔引起的拉应力。还描述了PE管道中缺陷的来源。为提高聚乙烯管道的耐用性而提出的设计和施工程序建议。

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