四川大学学报：工程科学版2011，Vol.43Issue(4)：13-20,8.
逆断层活动引起湿砂沉积层破坏特征的模型试验研究
Experimental Study on the Movement of the Reverse Fault Causing Surface Rupture on Wet Sand Deposit
摘要
Abstract
Geomechanical model tests were performed on wet sand in a glass-walled fault rest box to investigate the relationship between the propagation of fault rupture and the shapes,and the locations of failure surface.Three CCD cameras were used to capture the process of the surface rupture development and to analyze the displacement field by using the digital speckle correlation method.Based on the experiment,it was observed that when the thrust fault moved upward,the sediment layers formed a shear zone.The smaller the angle of faults,the wider of shear zone was formed in the sediment layer.The vertical displacement and the movement velocity of the fault are greater,the deformation of sediment layer is wider,and the deformation of the soil layer is stronger.When the vertical displacement of the fault exceeds 40% of the soil thickness,the deformed soil will form tension crack at the surface of the sediment.For a fixed sediment thickness with a fixed vertical displacement,the width of the deformation bands decreased with the increased fault movement velocity.However,the degree of deformation and failure will become more intense under a faster fault movement.Experimental results of this study on fault angle,fault movement velocity and sediment thickness is an important issue in further studies on ground deformation and failure characteristics of a thrust fault.关键词
逆断层/地质力学模型试验/数字散斑相关方法/断层传播模式/地表破裂特征Key words
reverse faults/geomechanical model test/digital speckle correlation method/propagation of fault rupture/surface rupture characteristic分类
土木建筑引用本文复制引用
张乾兵,黄凯珠..逆断层活动引起湿砂沉积层破坏特征的模型试验研究[J].四川大学学报：工程科学版,2011,43(4):13-20,8.基金项目
香港理工大学-四川大学合作项目资助“汶川地震中桥梁结构破坏现象的地质与力学原因分析和重建建议”（56/85G7）和香港理工大学科研基金资助项目 （）
