Reserve strength and rehabilitation of deteriorated pipe infrastructure

储备力量并修复老化的管道基础设施

• 批准号: RGPIN-2019-05465
• 负责人: Moore, Ian
• 金额: $ 5.72万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2021
• 资助国家: 加拿大
• 起止时间: 2021-01-01 至 2022-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=738312
• 关键词: Reserve; strength; rehabilitation; deteriorated; pipe

Many new methods of sewer, water pipe and culvert repair have been developed over the past two decades, and further procedures appear each year, servicing ongoing pipe infrastructure reinvestments of $2B/yr across Canada and up to $100B each year internationally. However, there are important knowledge gaps regarding the reserve (i.e. remaining) strength of deteriorated pipes, the interactions that result after repair with any of the many different liner systems, the controlling strength and service limit states, and appropriate approximations for development of design methods. Using the world's leading buried pipe test facility & new solutions for soil-pipe interaction, the Grant will support seminal contributions observing, explaining, quantifying and conceptually simplifying these complex `shell in shell in soil' systems. Complementary projects over 5 years will: a. Transform current methods of estimating remaining capacity of deteriorated metal and concrete culverts, and produce the first comprehensive methods for their load rating (setting allowable vehicle weights), considering damage to the pipe, the soil, and the pavement above, and permitting use of field measurements of response under truck loads. b. Realise the first demonstration systems where thrust & moment distributions for important culverts in the field are monitored from the desk-top c. Develop clear guidance on the behaviour and design (including strength limits) for culverts rehabilitated using cured in place liners, sprayed cementitious liners, grouted slipliners, and paved inverts, integrating previous work with new findings to address remaining knowledge gaps associated with culvert shape, cyclic loading, and grout choice. d. Clarify how the strength limits controlling performance of the two commonest kinds of pressure pipe liner (plain epoxy and fibreglass) used to repair cast iron water pipes are influenced by factors such as wrinkles & gaps at bends, and the liner-pipe adhesion and/or friction). The work will introduce new methods of analysis, full scale physical modeling, and design models, and will define or influence Canadian & international scholarship and design practices for these problems. The 18 HQP (6 MASc, 7 PhD and 5 Undergrad. students) trained will address the substantial demand for experts in these topics, to be recruited as municipal, structural and geotechnical professionals.

在过去的二十年里，人们开发了许多新的下水道、水管和涵洞修复方法，并且每年都会出现进一步的程序，为加拿大每年 2B 美元和国际上每年高达 100B 美元的持续管道基础设施再投资提供服务。然而，在退化管道的储备（即剩余）强度、与许多不同衬里系统修复后产生的相互作用、控制强度和使用极限状态以及设计方法开发的适当近似值方面存在重要的知识差距。该赠款将利用世界领先的埋地管道测试设施和土壤-管道相互作用的新解决方案，支持对这些复杂的“土壤中的壳层壳”系统进行观察、解释、量化和概念简化的开创性贡献。 5 年以上的补充项目将：改变目前估算受损金属和混凝土涵洞剩余容量的方法，并制定第一个综合方法来计算其额定载荷（设定允许的车辆重量），考虑对管道、土壤和上面路面的损坏，并允许现场使用测量卡车负载下的响应。 b.实现第一个演示系统，其中从桌面监控现场重要涵洞的推力和力矩分布 c.制定关于使用现场固化衬垫、喷涂水泥衬垫、灌浆滑动衬垫和铺砌内底修复涵洞的行为和设计（包括强度限制）的明确指南，将以前的工作与新发现相结合，以解决与涵洞形状、循环相关的剩余知识差距装载和灌浆选择。 d.阐明用于修复铸铁水管的两种最常见的压力管道内衬（普通环氧树脂和玻璃纤维）的强度限制控制性能如何受到诸如弯曲处的皱纹和间隙以及内衬-管道粘附和/或摩擦）。这项工作将引入新的分析方法、全尺寸物理建模和设计模型，并将定义或影响加拿大和国际针对这些问题的学术和设计实践。接受培训的 18 名 HQP（6 名硕士生、7 名博士生和 5 名本科生）将满足对这些主题专家的大量需求，被招募为市政、结构和岩土工程专业人员。