Analytical approach for estimating ground deformation profile induced by normal faulting in undrained clay

Although theoretical models have been developed to predict the location of the failure surface in soil induced by bedrock faulting, no analytical tool is available to estimate subsurface ground deformation. In this paper, a newly developed semi-empirical approach is introduced and developed for calculating surface and subsurface deformations induced by normal faulting in undrained clay. Based on observations from centrifuge model tests, the ground deformation mechanisms are identified by three regions; namely, a stationary zone, a shearing zone, and a rigid body zone. By using an error function to represent vertical displacement continuously, the ground deformation profile can be described quantitatively. It is revealed that the ground deformation profile depends on vertical displacement of the bedrock hanging wall, soil thickness, dip angle of the bedrock fault plane, and a shape parameter that is a function of the undrained shear modulus normalized by the undrained shear strength. Validation and consist...

[1]  A. S. Osman,et al.  On the kinematics of 2D tunnel collapse in undrained clay , 2006 .

[2]  H. Seed,et al.  Analysis of earthquake fault rupture propagation through cohesive soil , 1994 .

[3]  W. A. Take,et al.  Soil deformation measurement using particle image velocimetry (PIV) and photogrammetry , 2003 .

[4]  C. P. Wroth,et al.  The interpretation of in situ soil tests , 1984 .

[5]  Charles Wang Wai Ng,et al.  Three-dimensional ground settlements and stress-transfer mechanisms due to open-face tunnelling , 2005 .

[6]  Robert J. Mair,et al.  SUBSURFACE SETTLEMENT PROFILES ABOVE TUNNELS IN CLAYS , 1993 .

[7]  R. Peck.  Deep excavations and tunnelling in soft ground , 1969 .

[8]  I. Anastasopoulos,et al.  Simplified approach for design of raft foundations against fault rupture. Part II: soil-structure interaction , 2008 .

[9]  W. V. Kesteren,et al.  Introduction to the Physics of Cohesive Sediment in the Marine Environment , 2013 .

[10]  P. Lade,et al.  Influence Zones in Alluvium Over Dip‐Slip Faults , 1984 .

[11]  W. V. Kesteren,et al.  3 - The Nature of Cohesive Sediment , 2004 .

[12]  C. Ng,et al.  Centrifuge and numerical modeling of normal fault-rupture propagation in clay with and without a preexisting fracture. , 2012 .

[13]  D. Loukidis,et al.  Analysis of fault rupture propagation through uniform soil cover , 2009 .

[14]  Charles Wang Wai Ng,et al.  Centrifuge modeling of loose fill embankment subjected to uni-axial and bi-axial earthquakes , 2004 .

[15]  Akira Asaoka,et al.  OBSERVATIONAL PROCEDURE OF SETTLEMENT PREDICTION , 1978 .

[16]  M. F. Bransby,et al.  Fault Rupture Propagation through Sand: Finite-Element Analysis and Validation through Centrifuge Experiments , 2007 .

[17]  H. Seed,et al.  1 g Small-Scale Modelling of Saturated Cohesive Soils , 1993 .

[18]  I. Anastasopoulos,et al.  Simplified approach for design of raft foundations against fault rupture. Part I: free-field , 2008 .

[19]  Richard J. Finno,et al.  Distributions of ground movements parallel to deep excavations in clay , 2006 .

[20]  H. Seed,et al.  EARTHQUAKE FAULT RUPTURE PROPAGATION THROUGH SOIL , 1994 .