Geotechnical assessment of marginal soils for sustainable infrastructure

可持续基础设施边缘土壤的岩土工程评估

• 批准号: 515208-2017
• 负责人: Azam, Shahid
• 金额: $ 7.09万
• 依托单位: University of Regina
• 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=696896
• 关键词: Geotechnical; assessment; marginal; soils; sustainable

The sustainable (cost effective, environmentally friendly, and socially viable) management of civil infrastructure depends on a clear understanding of the engineering properties of the supporting soils. The interaction of marginal earthen materials (expansive clays and collapsible silts) with changing meteorological conditions poses serious challenges to an uninterrupted use of buried utilities. TransGas Limited provides natural gas (14,000 km long pipeline) as well as system integrity assessment and service for the distribution network (69,000 km of mains and 390,000 individual services). The main issue associated with buried pipes is the variable geotechnical pipe failure rate that ranges from 40/year to 110/year. In support of the company's management strategy, the main objective of this collaborative research is to understand and improve the geotechnical behavior of marginal soils. This is the first time that the company is participating in a comprehensive geotechnical evaluation of indigenous soils deposits. Based on a detailed research program (using laboratory investigation and numerical modeling), a scientific framework will be developed to work with expansive and collapsible sediments in Saskatchewan. Soil properties will be investigated using fundamental concepts of saturated and unsaturated soil mechanics under natural and compacted conditions. The resulting innovative technology (characterization protocols and computational predictions) will be pivotal for the design, construction, operation, and rehabilitation of civil infrastructure systems. The expected economic benefits of understanding and improving local marginal soils for TransGas Limited are minimizing the number of leak surveys and prioritizing vulnerable areas within the networks. Likewise, the environmental and safety benefits due to reduced pipe ruptures and gas leaks will ensure public confidence in the natural gas distribution system. The research results will be critical for the company for ongoing and future pipeline network expansions. Finally, the expected capacity development in technical expertise, recruitment of highly qualified professionals, and multi-disciplinary interactions are important benefits for the University of Regina

民用建筑的可持续(成本效益、环境友好和社会可行)管理 基础设施取决于对支撑土壤的工程性质的清楚了解。这个 边缘土材料(膨胀粘土和湿陷性粉土)与气象变化的相互作用 条件对不间断地使用埋藏的公用事业提出了严峻的挑战。TransGas Limited提供 天然气(14,000公里长的管道)以及系统完整性评估和分配服务 网络(69,000公里干线和390,000个独立服务)。与地下管道相关的主要问题是 可变的岩土管道故障率，范围从40/年到110/年。以支持该公司的 管理战略，这次合作研究的主要目的是了解和改进 边缘土的岩土特性。这是该公司第一次参加 原生土壤矿床的综合岩土评价。基于一项详细的研究计划 (使用实验室调查和数值模拟)，将开发一个科学框架来工作 在萨斯喀彻温省有膨胀和可坍塌的沉积物。土壤特性将使用以下方法进行调查 自然和压实条件下饱和和非饱和土力学的基本概念。 由此产生的创新技术(表征协议和计算预测)将是关键 用于民用基础设施系统的设计、建设、运营和修复。预期中的 对TransGas Limited来说，了解和改善当地边缘土壤的经济效益是最小的 泄漏调查的次数，并确定网络中易受攻击的区域的优先顺序。同样，环境问题 减少管道破裂和天然气泄漏带来的安全好处将确保公众对天然气的信心 分配系统。研究结果将对该公司正在进行的和未来的管道至关重要 网络扩展。最后，在技术专长方面的预期能力发展，招聘高度 合格的专业人员和多学科互动是里贾纳大学的重要优势