The development and application of a micro-geomechanical approach to investigate the long-term performance of subsurface structures

微观地质力学方法的开发和应用来研究地下结构的长期性能

• 批准号: 311971-2011
• 负责人: Meguid, Mohamed
• 金额: $ 1.53万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=548580
• 关键词: development; application; micro; geomechanical; approach

Many of our underground tunnels are more than 50 years old, and Canada invests billions of dollars each year on transportation, pedestrian and sewer tunnel repair. This has established a need to understand the long term failure mechanism of different tunnel lining systems. Most research has considered tunnels in their initial configuration over their service life, setting that service life by considering how the tunnel lining alone degrades. Actual failure often involves changes in soil and lining conditions and their interaction. The mechanics of soil weakening in the vicinity of subsurface structures (tunnels, vertical shafts and buried pipes) is a challenging soil-structure interaction problem that involves particle movement and lining separation from the supporting ground. Research is, therefore, needed to explain the interaction of different components considering the effect of soil and lining conditions.

我们的许多地下隧道都有50多年的历史，加拿大每年在交通、行人和下水道隧道修复上投资数十亿美元。这就需要了解不同隧道衬砌系统的长期破坏机理。大多数研究都考虑了隧道在其初始配置下的使用寿命，通过考虑隧道衬砌如何单独退化来设置使用寿命。实际的破坏往往涉及土体和衬砌条件的变化以及它们之间的相互作用。地下构筑物(隧道、竖井和埋地管道)附近的土体软化是一个具有挑战性的土-结构相互作用问题，涉及颗粒运动和衬砌与支撑地面的分离。因此，需要进行研究，以解释考虑到土壤和衬砌条件的影响的不同成分的相互作用。