A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Characterization of Rail Track Subsurface Using Seismic Refraction Survey
The efficiency of track foundation material gradually decreases due to insufficient lateral confinement, ballast fouling, and loss of the shear strength of soil due to local liquefaction and clay pumping. This paper presents characterization of rail track subsurface to identify ballast fouling and subsurface layers (capping layer, sub grade) strength using seismic refraction survey. Seismic refraction survey of multichannel analysis of surface wave analysis (MASW) has been carried out in model track and field track. Shear wave velocity obtained from MASW was used to identify the fouling character of track ballast, there by to evaluate track conditions. The shear velocity of fouled ballast increases with fouling percentage and reaches a maximum value then decreases. This character is used to define optimum and critical fouling points of fouled ballast. This article also highlights ballast gradation followed in India and comparison of Indian ballast gradation with international gradation standards. The ballast gradation followed by Indian railways is poorly graded and more favorable for drainage.
Characterization of Rail Track Subsurface Using Seismic Refraction Survey
The efficiency of track foundation material gradually decreases due to insufficient lateral confinement, ballast fouling, and loss of the shear strength of soil due to local liquefaction and clay pumping. This paper presents characterization of rail track subsurface to identify ballast fouling and subsurface layers (capping layer, sub grade) strength using seismic refraction survey. Seismic refraction survey of multichannel analysis of surface wave analysis (MASW) has been carried out in model track and field track. Shear wave velocity obtained from MASW was used to identify the fouling character of track ballast, there by to evaluate track conditions. The shear velocity of fouled ballast increases with fouling percentage and reaches a maximum value then decreases. This character is used to define optimum and critical fouling points of fouled ballast. This article also highlights ballast gradation followed in India and comparison of Indian ballast gradation with international gradation standards. The ballast gradation followed by Indian railways is poorly graded and more favorable for drainage.
Characterization of Rail Track Subsurface Using Seismic Refraction Survey
Anbazhagan, P. (author) / Rashmi, H. N. (author)
GeoHunan International Conference 2011 ; 2011 ; Hunan, China
2011-05-16
Conference paper
Electronic Resource
English
Characterization of Rail Track Subsurface Using Seismic Refraction Survey
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