A New Paradigm for Slope Stability Analysis under Variably Saturated Conditions
主讲人: Ning Lu
时间: 2019年3月25日(星期一)下午14:30
地点:泥沙馆数字报告厅
讲座二内容摘要:
This lecture will highlight two major advancements in slope stability analysis that stemmed from several multi-year field hydro-mechanical monitoring. The first significant breakthrough is the capability to handle the transient field of effective stress in variably saturated slopes under rainfall conditions. Using effective stress analysis preserves the rigor, simplicity, and practicality of the classical slope stability methodologies (e.g., limit equilibrium). The second is to quantify the field of local factor of safety (FS), which radically departs from the classical one-FS-for-one-slope paradigm and allows identification of failure initiation and progression zones in slopes. The new hydro-mechanical framework for slope stability design and analysis only requires three parameters in addition to the classical shear strength and seepage parameters. These parameters are used to uniquely define slope materials’ constitutive relations of the soil water characteristic curve, hydraulic conductivity function, and suction stress characteristic curve. Several field cases are used to illustrate the validity, accuracy and simplicity of the new hydro-mechanical framework for slope stability analysis.
主讲人介绍：
Ning Lu is professor of civil and environmental engineering at Colorado School of Mines (CSM) and the director of the joint CSM/US Geological Survey Geotechnical Research Laboratory in Golden, CO. He is a recipient of the ASCE 2007 Norman Medal, of the ASCE 2010 Croes Medal, of the ASCE 2017 Ralph B. Peck Award, and of the ASCE 2017 Maurice Biot Medal, as well as a fellow of ASCE, Engineering Mechanics Institute, and Geological Society of America. His primary research interests are flow and stress laws in multiphase porous media, rainfall-induced instability of natural and engineered slopes, geologic hazards, energy storage in porous media, and subsurface nuclear waste isolation. He is the senior author of the widely used textbook Unsaturated Soil Mechanics (John Wiley and Sons, 2004) and the textbook Hillslope Hydrology and Stability (Cambridge University Press, 2013). Both books are translated into Chinese and published by The Chinese Higher Education Press.
