A REVIEW ON PHYSICAL MODELING IN GEOMECHANICS
作者单位：The University of Tehran Iran
会议名称：《2009 International Symposium on Rock Mechanics:"Rock Characterisation,Modelling and Engineering Design Methods"》
会议日期：2009年
学科分类：0709[理学-地质学] 081803[工学-地质工程] 07[理学] 08[工学] 0818[工学-地质资源与地质工程]
关 键 词：Physical modeling Geomechanics Dimensional analysis Similarity theory
摘 要：Physical modeling has played an important role in studies related to complex tunnel *** method is still used despite the high investment costs for experimental facilities and the contrasting declining numerical modeling *** of limitations in numerical models for correct implementation of soil and rock behavior(*** linear response,strength anisotropy,accumulation of damage within cemented materials etc.) physical models still can be used to calibrate numerical models.A variety of modeling techniques have been developed by researchers to study ground response due to in-situ stress field. These techniques range from two-dimensional models to miniature tunnel boring machines that simulate the process of tunnel excavation and lining installation in a centrifuge. Physical modeling utilizes similarity theory and dimensional *** rules of these theories dictate material and model properties,the manner of applying forces and field stresses,method of model construction,boundary conditions,monitoring and so on. In this paper,methods of making various physical models and their conditions together with the parameters that need to be determined accurately are ***,a model is tested in the laboratory for studying rules that is reviewed in this paper. Results of the paper show that physical models can provide valuable data that can be used to validate and calibrate numerical models.A visual control that provides a deep insight for the researcher about different modes of instability that gradually builds up is also a valuable output of physical modeling. Different methods have been developed to simulate the process of tunnel construction.A pulling pipe method is used in this study the results of which are shown in the paper.