Behaviour and design of cured in place liners in noncircular corrugated steel culverts

非圆形波纹钢涵洞内就地固化内衬的性能和设计

• 批准号: 543835-2019
• 负责人: Moore, Ian
• 金额: $ 1.75万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2020
• 资助国家: 加拿大
• 起止时间: 2020-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=699716
• 关键词: Behaviour; design; cured; place; liners

Across Canada, tens of thousands of old corrugated steel culverts and sewers require rehabilitation or replacement. Cured in place pipe (CIPP) liners are now well established rehabilitation options for concrete and clay storm and sanitary sewers. However, there is no established design method for CIPP liners installed within corrugated steel sewers and culverts: the procedures in ASTM F1216 used for CIPP liners within rigid sewers are not suitable, because they a. are only for circular or almost circular structures, b. neglect vehicle loads. This project involves four phases: a literature review, full scale testing to investigate liner response to vehicle loads, further testing to study liner resistance to external fluid loads, and development of design procedures. The second phase involves burying two corrugated steel pipes with elliptical geometry in the GeoEngineering Laboratory at Queen's. One culvert will be lined using a conventional CIPP resin-impregnated felt liner, and the other using fibre-reinforced, UV cured liner. Performance testing under simulated vehicle loads will be conducted before and after repair. Measurements will establish how thrust and moment develop in the liners and the old steel structure, and the nature of the liner-steel culvert- soil interactions. Final tests on each lined culvert will increase surface load until strength is fully mobilized, to establish the failure mechanisms. These will be the first tests of their kind ever performed. During the third stage, two further samples of the same CIPP liner types will be tested under external fluid pressure to measure, for the first time, buckling strength of liners within these kinds of steel culverts. The final stage of the project will involve use of finite element analyses to interpret the test observations, and to develop design methods for use in selecting suitable liner thicknesses and polymer properties. Two PhD students will be trained and there will be active participation of the research partner (a specialist rehabilitation contractor) who will subsequently use the design methods for culvert projects across Canada.

在加拿大各地，数以万计的旧波纹钢涵洞和下水道需要修复或更换。就地固化管道 (CIPP) 内衬现已成为混凝土和粘土风暴和生活污水管道的成熟修复选择。然而，对于安装在波纹钢下水道和涵洞内的 CIPP 衬里，尚无既定的设计方法：用于刚性下水道内 CIPP 衬里的 ASTM F1216 中的程序不适合，因为它们：仅适用于圆形或近似圆形的结构，b．忽略车辆负载。该项目包括四个阶段：文献综述、全面测试以研究衬里对车辆负载的响应、进一步测试以研究衬里对外部流体负载的抵抗力以及设计程序的开发。 第二阶段包括在女王大学地球工程实验室埋设两根椭圆几何形状的波纹钢管。 一个涵洞将使用传统的 CIPP 树脂浸渍毡衬里，另一个涵洞将使用纤维增强的紫外线固化衬里。修复前后将进行模拟车辆负载下的性能测试。测量将确定衬砌和旧钢结构中的推力和力矩如何发展，以及衬砌-钢涵-土壤相互作用的性质。对每个衬砌涵洞的最终测试将增加表面载荷，直到强度得到充分调动，以建立失效机制。这些将是此类测试中首次进行的。 在第三阶段，将在外部流体压力下对相同 CIPP 衬管类型的另外两个样品进行测试，以首次测量此类钢涵管内衬管的抗弯强度。 该项目的最后阶段将涉及使用有限元分析来解释测试观察结果，并开发用于选择合适的衬里厚度和聚合物特性的设计方法。 两名博士生将接受培训，研究合作伙伴（专业修复承包商）将积极参与，他们随后将在加拿大各地的涵洞项目中使用这些设计方法。