Double wall barriers for the reduction of ground vibration transmission

Abstract Stiff wall barriers can be effective in reducing the transmission of environmental ground vibration. Up to now, single wall barriers have mostly been studied. In building acoustics, however, double walls are used in order to realize a high level of sound insulation. In this paper, the potential of using double walls in reducing ground vibration transmission is investigated by means of numerical simulations. Two cases are studied: jet-grout walls and concrete walls in a homogeneous soil with elastic properties representative of a sandy soil. For both cases, the three-dimensional free field response due to a point load is computed using a 2.5D finite element methodology. Subsequently, the free field response is computed for a simplified train load. Double jet-grout wall barriers are found to be slightly more effective than single wall barriers, in particular when the thickness of the walls and the intermediate soil matches a quarter Rayleigh wavelength. The largest increase in vibration reduction is found for the area closest to the vibration source, where the vibration levels have the highest values. The performance of concrete wall barriers, however, is mainly determined by the stiffness of the walls, and almost no difference in performance is found for single and double walls.

[1]  L. Cremer,et al.  Structure-Borne Sound: Structural Vibrations and Sound Radiation at Audio Frequencies , 1973 .

[2]  Karl Meerbergen,et al.  The Quadratic Eigenvalue Problem , 2001, SIAM Rev..

[3]  K. Massarsch.  Vibration Isolation Using Gas-filled Cushions , 2005 .

[4]  Jian Jiang,et al.  Mitigation of railway induced ground vibration by heavy masses next to the track , 2015 .

[5]  Jim Nelson,et al.  RECENT DEVELOPMENTS IN GROUND-BORNE NOISE AND VIBRATION CONTROL , 1996 .

[6]  Harald Loy.  Mitigating vibration using under-sleeper pads , 2012 .

[7]  Anders Karlström,et al.  Efficiency of trenches along railways for trains moving at sub-or supersonic speeds , 2007 .

[8]  R. Woods.  SCREENING OF SURFACE WAVES IN SOILS , 1968 .

[9]  Geert Lombaert,et al.  Verification of an empirical prediction method for railway induced vibrations by means of numerical simulations , 2011 .

[10]  Geert Lombaert,et al.  A 2.5D displacement-based PML for elastodynamic wave propagation , 2010 .

[11]  A. Cummings,et al.  The transmission loss of double panels , 1967 .

[12]  S. Ahmad,et al.  Simplified design for vibration screening by open and in-filled trenches , 1991 .

[13]  Maurice Petyt,et al.  Surface vibration propagation over a layered elastic half-space with an inclusion , 1999 .

[14]  A. D. S. Barr.  Torsional Waves in Uniform Rods of non-Circular Section , 1962 .

[15]  Geert Lombaert,et al.  The control of ground-borne vibrations from railway traffic by means of continuous floating slabs , 2006 .

[16]  Geert Lombaert,et al.  Experimental and numerical evaluation of the effectiveness of a stiff wave barrier in the soil , 2015 .

[17]  Søren Nielsen,et al.  Reduction of ground vibration by means of barriers or soil improvement along a railway track , 2005 .

[18]  Rui Calçada,et al.  Ballast mats for the reduction of railway traffic vibrations. Numerical study , 2012 .

[19]  Hem Hunt,et al.  A Generic Model for Evaluating the Performance of Base-Isolated Buildings , 2003 .

[20]  E. Kausel,et al.  Stiffness matrices for layered soils , 1981 .

[21]  Yeong-Bin Yang,et al.  A 2.5D finite/infinite element approach for modelling visco‐elastic bodies subjected to moving loads , 2001 .

[22]  Hirokazu Takemiya,et al.  Wave propagation/impediment in a stratum and wave impeding block (WIB) measured for SSI response reduction , 1994 .

[23]  S. Timoshenko,et al.  X. On the transverse vibrations of bars of uniform cross-section , 1922 .

[24]  Geert Lombaert,et al.  Topology optimization of one-dimensional wave impeding barriers , 2014 .

[25]  G. Cowper.  The Shear Coefficient in Timoshenko’s Beam Theory , 1966 .

[26]  Geert Lombaert,et al.  A two‐and‐a‐half‐dimensional displacement‐based PML for elastodynamic wave propagation , 2012 .

[27]  N. Stephen.  Comparison of dynamic torsion theories for beams of elliptical cross-section , 1985 .

[28]  Singiresu S. Rao.  Vibration of Continuous Systems , 2019 .

[29]  Demosthenes Polyzos,et al.  Modelling of pile wave barriers by effective trenches and their screening effectiveness , 1999 .

[30]  Robert Hildebrand,et al.  Effect of soil stabilization on audible band railway ground vibration , 2004 .

[31]  Geert Lombaert,et al.  Efficacy of a sheet pile wall as a wave barrier for railway induced ground vibration , 2016 .

[32]  G. Lombaert,et al.  Subgrade stiffening next to the track as a wave impeding barrier for railway induced vibrations , 2013 .

[33]  Frank Fahy,et al.  Sound and Structural VibrationRadiation, Transmission and Response , 2007 .