A constitutive model to analyse internal erosion in embankment dams

分析堤坝内侵蚀的本构模型

• 批准号: 507630-2016
• 负责人: Fannin, Robin
• 金额: $ 12.25万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=693962
• 关键词: constitutive; model; analyse; internal; erosion

Canada is the world's biggest producer of hydroelectric power. British Columbia, like Quebec, Manitoba, Newfoundland and Labrador, and the Yukon, generates almost 90 % of its energy from renewable hydropower sources. The Bennett Dam in British Columbia was, upon completion of construction in 1967, the largest embankment dam in the world. Three dams (the Bennett, Mica, and Revelstoke dams) generate over half of the province's electricity. They represent an enormous investment by society-at-large and, like much of our public infrastructure, these embankment dams are aging, yielding a potential for water seeping from the reservoir to erode soil within the dam and its foundation. Internal erosion is a dam safety risk that was not understood at the time of construction - it is now recognised to pose one of the greatest risks to dam safety.We propose a joint research project with BC Hydro (BCH) to address the questions of where, and when, internal erosion may occur in an embankment dam. We will perform laboratory tests on soil from embankment dams, and compare the findings with forensic observations at the now-decommissioned Coursier Dam, and with field monitoring data available around the sinkhole incidents at the Bennett Dam. We will formulate and calibrate a constitutive model to analyse where erosion can be expected to initiate, and at what rate it progresses, within the body of an embankment dam. Given the similarity of geologic processes and soil formation across Canada, the findings will be of general relevance to northern-climate embankment dams, regardless of size or purpose. Our proposed work will benefit the Canadian dam sector by placing its commitment to dam safety at a level that is undeniably world-class, and befitting of a country that is the biggest producer of hydroelectric power in the world.

加拿大是世界上最大的水力发电生产国。 不列颠哥伦比亚省，例如魁北克，曼尼托巴省，纽芬兰和拉布拉多以及育空地区，以及育空地区的可再生水电来源产生了近90％的能源。 1967年，不列颠哥伦比亚省的贝内特大坝是世界上最大的堤坝大坝建造后。 三个水坝（贝内特，云母和雷夫尔斯托克大坝）产生了该省一半以上的电力。 它们代表了整个社会的巨大投资，就像我们的许多公共基础设施一样，这些路堤大坝正在衰老，产生了从水库中渗入水从水坝及其基础内侵蚀土壤的潜力。 内部侵蚀是在建设时尚不清楚的大坝安全风险 - 现在它被认为是大坝安全的最大风险之一。我们与BC Hydro（BCH）提出了一个联合研究项目，以解决有关位置的问题，当内部侵蚀可能发生在路堤大坝中时。 我们将对堤坝大坝的土壤进行实验室测试，并将发现与现已被任命的Coursier大坝的法医观察进行比较，并在Bennett大坝的污水坑中可用的现场监测数据进行比较。 我们将制定并校准一个组成型模型，以分析预期在路堤大坝体内侵蚀的侵蚀何处，并以何种速度启动。 鉴于整个加拿大的地质过程和土壤形成的相似性，这些发现将与北部气候路堤大坝具有一般相关性，无论大小或目的如何。 我们提出的工作将通过将其对大坝安全的承诺放在世界一流的水平上，并适合这个国家最大的水力发电生产国，从而使加拿大大坝行业受益。