Long-term deformation performance of earth dams on marine clays

海相粘土土坝的长期变形性能

• 批准号: 451759-2013
• 负责人: Liu, Jinyuan
• 金额: $ 1.82万
• 依托单位: Ryerson University
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 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=540497
• 关键词: Long; term; deformation; performance; earth

This proposed research is to numerically investigate the long-term deformation performance of an embankment dam founded on a deep deposit of marine clay. This research will be performed in collaboration with Ontario Power Generation Inc (OPG). The performance of earth embankment dams is adversely affected by the continuous settlement and lateral spreading of its foundation due to consolidation of underlying marine clay. Marine clay is notorious for being involved in many landslides worldwide with its peculiar properties of high sensitivity and low shear strength. Prediction of such performance can be further complicated by other mechanisms such as (a) weakening of the foundation clay due to loss of salinity, (b) weakening of the foundation soil by strain softening, and (c) strengthening of the foundation soil through consolidation.

本研究拟以数值方法探讨建立于深厚海相黏土存款层上之土石坝之长期变形特性。这项研究将与安大略发电公司（OPG）合作进行。土坝的性能受到由于下卧海粘土固结而引起的地基持续沉降和侧向扩展的不利影响。海积粘土具有高敏感性和低抗剪强度的特性，在世界范围内的滑坡灾害中占有重要地位。这种性能的预测可能会因其他机制而进一步复杂化，例如（a）由于盐度损失而削弱地基粘土，（B）由于应变软化而削弱地基土壤，以及（c）通过固结而加强地基土壤。