Constitutive and numerical modeling of granular assembly and debris flow

拟议的研究重点是发展分析土壤移动性和土壤运动的计算机模拟能力。地面移动和土体移动是岩土工程中的重要课题。对于许多工程项目来说，大大小小的运动都是有意义的，有时甚至是至关重要的。滑坡、泥石流等土体的大运移和快速流动威胁着人类的安全，造成财产损失。因此，已采用定量风险分析(QRA)来确定滑坡和泥石流的潜在威胁。为了有效地应用QRA，有必要以合理的精度和可靠性分析土壤运动和土壤移动性。 除了管理自然灾害，地面移动计算对于a)采矿业，确保矿山和材料处理的安全，b)采掘业，如石油和天然气，对于井眼的稳定性，以及c)任何使用地面来支撑建筑物或正在进行改变地面条件的工作的人都是有意义的。 这项研究将发展和改进现有的分析土壤流动性和土壤运动的本构模型，并开发用于分析土壤流动性的数值技术。该数值模型将能够模拟土壤运动，并计算水流的速度、距离和数量。该模型是基于连续介质和非连续介质相结合的方法，这将使我们能够使用连续介质模型来获得土体的本构描述并计算大的土体运动。

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.