seminario taller_suelos no saturados_uaq
TRANSCRIPT
Ning Lu is professor of civil and environmental engineering at Colorado School of Mines (CSM) and the director of the joint CSM/USGS Geotechnical Research Laboratory in Golden, CO. He is a recIpient of ASCE 2007 Norman Medal and the recipient of ASCE 2010 Croes Medal, and an elected fellow of Geological Society of America and American Society of Civil Engineers. His current research focuses on developing a unified coupled hydromechanical framework for variably saturated porous media and applying it to rainfallinduced landslide analysis. He is the senior author of widely used textbook Unsaturated Soil Mechanics (John Wiley and Sons, 2004) and a newly published textbook Hillslope Hydrology and Stability, (Cambridge University Press, 2013). He can be reached via [email protected].
DIRECTORIO
Dr. Gilberto Herrera RuizRector de la Universidad Autónoma de
Querétaro
Dr. Aurelio Domínguez GonzálezDirector de la Facultad de Ingeniería
Dr. Manuel Toledano AyalaJefe de la División de Investigación y Posgrado
Dra. María de la Luz Pérez ReaResponsable del Cuerpo Académico de Suelos.
Dr. Eduardo Rojas GonzálezResponsable del Seminario-Taller
Informes:
Dra. María de la Luz Pérez ReaCorreo electrónico: [email protected]
Teléfono: 192-12-00 Ext: 6062
SEMINARIO-TALLER
ORGANIZA:CUERPO ACADÉMICO DE SUELOS,FACULTAD DE INGENIERÍA, UAQ
25—26—27NOVIEMBRE 2013
PROFESOR INVITADO:Dr. Ning Lu, Ph.D. Colorado School of Mines, Golden CO, USA
AUDITORIO DE LA FACULTAD DE INGENIERÍA“JESÚS PÉREZ HERMOSILLO”
PÚBLICO:Estudiantes y Profesores de Licenciatura, Maestría y Doctorado interesados en el campo de los Suelos No saturados
“NUEVAS TENDENCIAS EN LA MECANICA DE SUELOS
NO SATURADOS”
EVENTO SIN COSTOSe requieren conocimientos
intermedios de Inglés
Martes 26 de Noviembre de 2013
09:00-12:00 Tema: “Transient releases and imbibitions method for fast measuring soil-water retention curve and hydraulic conductivity function”. Auditorio “Jesús Pérez Hermosillo”.
12:30-14:00 Taller con Profesores y Estudiantes. Aula del Laboratorio de Mecánica de Suelos.
Abstract: A transient water release and imbibitions method (TRIM) for measuring the soil water retention curve (SWRC) and hydraulic conductivity function (HCF) under drying and wetting states is presented. The intellectual merit of the TRIM method is its integration of physical and numerical experiments: it employs the simple and reliable measurement of transient water content by electronic balance to record the signature of transient unsaturated flow in soil sample, and it takes advantage of the robust inverse modeling capability to simulate the physical process.
Miércoles 26 de Noviembre de 2013
09:00-12:00 “Advancing the predictability of Infiltration-Induced Slope Instability”. Auditorio “Jesús Pérez Hermosillo”.
12:30-13:30 Taller con Profesores y Estudiantes. Aula del Laboratorio de Mecánica de Suelos.
13:30-14:10 Conclusiones y Clausura. Dr. Eduardo Rojas González. Aula del Laborato-rio de Mecánica de Suelos.
Abstract Slope-stability analyses are mostly conduct-ed by identifying or assuming a potential failure surface and assessing the factor of safety (FS) of that surface. This approach of assigning a single FS to a potentially unstable slope provides little insight on where the fail-ure initiates or ultimate geometry and location of a landslide rupture surface. We describe a method to quantify a scalar field of FS based on the concept of the Coulomb stress and the shift in the state of stress towards failure that results from rainfall infiltration. The LFS provides a new means to quantify the potential instability zones in hillslopes under variably saturated conditions using stress-field based methods.
Lunes 25 de Noviembre de 2013
09:00-09:30 Inauguración y palabras de bienvenida del Dr. Aurelio Domínguez González, Director de la Facultad de Ingeniería. Auditorio “Jesús Pérez Hermosillo”.
09:30-12:00 Tema: “A unified effective stress for variably saturated soils”. Auditorio “Jesús Pérez Hermosillo”.
12:30-14:00 Taller con Profesores y Estudiantes. Aula del Laboratorio de Mecánica de Suelos.
Abstract: A unified effective stress concept based on the suction stress characteristic curve (SSCC) for variably-saturated soil is discussed. Suction stress characteristically depends on degree of saturation, or soil suction, thus paralleling well established concept of the soilwater characteristic curve in soil physics. A closed form equation for predicting the suction stress for all soils is found. A case study of shallow landslide initiation induced by heavy rainfalls in Seattle area illustrates that variation in suction stress can well reconcile the spatial and temporal characteristics of the event. Suction stress provides a potentially simple and practical means to describe the state of stress in unsaturated soil.