Investigation into optimization of support elements associated with tunnelling for civil infrastructure

与民用基础设施隧道施工相关的支撑元件优化研究

• 批准号: 402333-2011
• 负责人: Vlachopoulos, Nicholas
• 金额: $ 1.75万
• 依托单位: Royal Military College of Canada
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2013
• 资助国家: 加拿大
• 起止时间: 2013-01-01 至 2014-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=529529
• 关键词: Investigation; into; optimization; support; elements

Canada has a vast underground infrastructure worth billions in terms of tunnelling works for access to natural resources, and civil infrastructure. Investment in Public Infrastructure has been declining as a percentage of Gross Dometic Product (GDP), hovering just below 1.5%. Population and economic growth are combining to increasingly overburden Canada's public infrastructure. All of these factors suggest that engineers are tasked to do more with less and must be forced to optimize their designs in order to provide sustainable, cost-effective solutions. Tunnelling through weak rock as part of civil infrastructure works (i.e. tunnelling roads, railways, intakes for power stations etc.) presents unique challenges to the engineer, as misjudgments in the design of support systems can lead to costly failures if under-designed or high tunnelling costs if over-designed. Currently, a true optimized and mechanics-based design process for the various tunnel support technologies is not fully developed. The objectives of this research are: 1. To optimize civil infrastructure tunnel support design; balancing safety & cost, 2. To advance the science of proper geomaterial characterization through fieldwork in order to obtain reliable strength estimates, 3. To isolate the behaviour, influence and effect of specific support elements within a multi-element, interactive tunnel support system, and, 4. To improve upon analytical and modelling tools for weak geomaterials and support systems. The novelty of this work lies in the fact that limited research to date has explored the temporary tunnel support system as a composite, interactive scheme in order to obtain a true optimization of the temporary support structure based on a composite, interactive support performance. This research will help support the quality and level of public infrastructure that Canada requires in order to keep pace with the demands of an ever-changing world; a world of competitive of increasing urbanization and infrstructure expansion. Modern, strong and innovative infrastructure is an essential building block for Canada's competitiveness and long-term prosperity for Canadians. This research (with national and international collaborations) will be of national significance and impact.

加拿大拥有庞大的地下基础设施，在获取自然资源的隧道工程和民用基础设施方面价值数十亿美元。公共基础设施投资占国内生产总值(GDP)的比例一直在下降，徘徊在略低于1.5%的水平。人口和经济增长结合在一起，使加拿大的公共基础设施日益不堪重负。所有这些因素都表明，工程师的任务是用更少的资源做更多的事情，必须迫使他们优化设计，以提供可持续的、具有成本效益的解决方案。在软弱岩石中挖掘隧道，作为土木工程的一部分(如修建隧道公路、铁路、电站进水口等)。给工程师带来了独特的挑战，因为支撑系统设计中的误判如果设计不足可能会导致代价高昂的失败，如果过度设计可能会导致高昂的隧道成本。目前，针对各种隧道支护技术的真正优化和基于力学的设计过程还没有完全开发出来。本研究的目标是：1.优化民用基础设施隧道支撑设计；平衡安全与成本；2.通过现场工作促进正确的岩土材料特性的科学研究，以获得可靠的强度估计；3.在多元素、交互的隧道支撑系统中隔离特定支撑元素的行为、影响和效果；以及4.改进针对薄弱岩土材料和支撑系统的分析和建模工具。这项工作的新颖性在于，到目前为止，有限的研究将临时隧道支护系统作为一种组合的、交互的方案进行探索，以获得基于复合、交互支护性能的临时支护结构的真正优化。这项研究将有助于支持加拿大所需的公共基础设施的质量和水平，以跟上不断变化的世界的需求；世界竞争日益激烈，城市化日益加剧，基础设施不断扩大。现代化、强大和创新的基础设施是加拿大竞争力和加拿大人长期繁荣的重要基石。这项研究(与国家和国际合作)将具有国家意义和影响。