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: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=573246
• 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.

加拿大拥有巨大的地下基础设施，在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。 人口和经济增长正在使加拿大的公共基础设施负担越来越重。所有这些因素都表明，工程师的任务是用更少的东西做更多的事情，必须优化他们的设计，以提供可持续的，具有成本效益的解决方案。作为土木基础设施工程的一部分，在软岩中开挖隧道（即，在公路、铁路、发电站进水口等处开挖隧道）这对工程师提出了独特的挑战，因为如果设计不足，支撑系统设计中的错误判断可能导致代价高昂的故障，或者如果设计过度，则会导致高昂的隧道成本。目前，各种隧道支护技术的真正优化和基于力学的设计过程尚未完全开发。本研究的目的是：1.优化民用基础设施隧道支护设计，平衡安全与成本; 2.为了通过实地工作推进适当的地质材料特性的科学，以获得可靠的强度估计，3。在多元交互式隧道支护系统中隔离特定支护元件的行为、影响和效果; 4.改进针对薄弱地质材料和支持系统的分析和建模工具。这项工作的新奇之处在于，有限的研究到目前为止，已经探索了临时隧道支护系统作为一个复合的，互动的计划，以获得一个真正的优化的临时支护结构的基础上的复合，互动的支持性能。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;一个竞争日益激烈的城市化和基础设施扩张的世界。 现代化、强大和创新的基础设施是加拿大竞争力和长期繁荣的重要组成部分。这项研究（与国家和国际合作）将具有国家意义和影响。