TY - GEN
T1 - A parametric study of backfilled trench for reduction of tbm induced ground vibrations
AU - Rahman, Muhammad E.
AU - Orr, Trevor L.L.
PY - 2006
Y1 - 2006
N2 - Wave barriers in the form of backfilled trenches are often installed in the ground to reduce the ground vibrations induced by man-made sources, such as traffic and machine foundations. This type of ground vibration and ground vibrations due to tunnel boring machines (TBMs) can be a major problem in densely populated urban areas and for structures housing sensitive equipment. No previously published research has been found in the literature on the use of backfilled trenches to provide a screen to the vibrations due to TBMs. In this paper the results of a numerical study, using a 3-D finite element model with infinite elements, to investigate the effectiveness of backfilled trenches in reducing the ground surface vibration due to tunnelling activities are presented. The ABAQUS V6.4 finite element software has been used to construct the model and three-dimensional eight-noded linear brick and reduced integration elements are employed for the ground and the tunnel lining. The effects of variations in the geometrical and material properties of the backfilled trench on reducing the ground vibrations have been studied. The findings of this study are that only a thin trench is required to provide an effective wave barrier giving a significant reduction in the vibration velocity, the percentage reduction in the vibration velocity increases with increasing depth of the wave barriers, and softer backfill material yields a better screening effect than stiffer material.
AB - Wave barriers in the form of backfilled trenches are often installed in the ground to reduce the ground vibrations induced by man-made sources, such as traffic and machine foundations. This type of ground vibration and ground vibrations due to tunnel boring machines (TBMs) can be a major problem in densely populated urban areas and for structures housing sensitive equipment. No previously published research has been found in the literature on the use of backfilled trenches to provide a screen to the vibrations due to TBMs. In this paper the results of a numerical study, using a 3-D finite element model with infinite elements, to investigate the effectiveness of backfilled trenches in reducing the ground surface vibration due to tunnelling activities are presented. The ABAQUS V6.4 finite element software has been used to construct the model and three-dimensional eight-noded linear brick and reduced integration elements are employed for the ground and the tunnel lining. The effects of variations in the geometrical and material properties of the backfilled trench on reducing the ground vibrations have been studied. The findings of this study are that only a thin trench is required to provide an effective wave barrier giving a significant reduction in the vibration velocity, the percentage reduction in the vibration velocity increases with increasing depth of the wave barriers, and softer backfill material yields a better screening effect than stiffer material.
UR - http://www.scopus.com/inward/record.url?scp=84883334744&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:84883334744
SN - 9781627481502
T3 - 13th International Congress on Sound and Vibration 2006, ICSV 2006
SP - 1296
EP - 1303
BT - 13th International Congress on Sound and Vibration 2006, ICSV 2006
T2 - 13th International Congress on Sound and Vibration 2006, ICSV 2006
Y2 - 2 July 2006 through 6 July 2006
ER -
