Constitutive and numerical modeling of granular assembly and debris flow

颗粒聚集和泥石流的本构和数值模拟

• 批准号: 6596-2012
• 负责人: Chan, Dave
• 金额: $ 1.53万
• 依托单位: University of Alberta
• 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=568477
• 关键词: Constitutive; numerical; modeling; granular; assembly

The proposed research is focused on the development of computer modeling capabilities in analyzing soil mobility and soil movement. Ground movement and soil mobility are important subjects in geotechnical engineering. Small and large movements are of interest, and sometimes crucial, for many engineering projects. Large movement and fast mobility of soil, such as landslides and debris flow, threaten human safety and cause property damage. As a result, a quantitative risk analysis (QRA) has been adopted to determine potential threats due to landslides and debris flow. In order to effectively apply the QRA, it is necessary to analyze soil movement and soil mobility with reasonable accuracy and reliability. Aside from managing natural hazards, ground movement calculation is of interest to a) the mining industry, in ensuring the safety of mines and handling of materials, b) the extraction industry, such as oil and gas, in stability of well bores, and c) anyone who uses the ground to support a structure or is carrying out work that changes the ground conditions. This research will develop and make improvements in existing constitutive models for analyzing soil mobility and soil movement, and develop numerical techniques for analyzing the mobility of soils. The numerical model will be able to simulate soil movement and calculate the velocity, distance and quantity of flow. The model is based on a combined continuum and discontinuum approach which will enable us to use continuum models to arrive at a constitutive description of soils and calculate large soil movements.

拟议的研究重点是在分析土壤流动性和土壤运动的计算机建模能力的发展。地表移动和土体流动性是岩土工程中的重要课题。对于许多工程项目来说，小的和大的运动都很重要，有时甚至是至关重要的。滑坡、泥石流等土体运动量大、速度快，威胁着人类的安全，造成财产损失。因此，定量风险分析（QRA）已被采用，以确定潜在的威胁，由于滑坡和泥石流。为了有效地应用QRA，必须以合理的精度和可靠性分析土壤移动和土壤流动性。 除了管理自然灾害外，地表移动计算还对以下人员有重要意义：a）采矿业，以确保矿山安全和材料处理; B）开采业，如石油和天然气，以确保井筒稳定; c）任何使用地面支撑结构或正在进行改变地面条件的工作的人。 这项研究将发展和改进现有的本构模型，分析土壤的流动性和土壤运动，并开发数值技术分析土壤的流动性。该数值模型将能够模拟土壤运动，并计算流速，距离和流量。 该模型是基于一个相结合的连续和不连续的方法，这将使我们能够使用连续模型来达到一个本构描述的土壤和计算大的土壤运动。