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INVESTIGATION OF THE IMPACT OF VEHICULAR AND POWER PLANT GROUND VIBRATIONS ON THE ENVIRONMENT IN CALABAR. By Igwe O. Ewona, Bassey J. Ekah, Theresa I. Ewona

ABSTRACT
An investigation of traffic and electric generator Ground Induced Vibration (GIV) on the environment has been carried out in selected areas in Calabar. The research was focused on the measurement of amplitude of ground vibration due to road traffic and electric generators by measuring associated vibrations in the surrounding area. Measurements of Traffic induced vibrations were carried out with different sizes of vehicles on smooth roads as well as around potholes and bumps. Generator ground induced vibrations on the other hand were noted on different sizes of generators. ABEM Vibraloc – vibration measuring equipment was used for the study. The Peak Particle Velocity (PPV) of vibrations were plotted against masses for different locations and at different distances from the source of the vibration. Measurements consisted of vertical V, Longitudinal L, and Transverse T, amplitudes of vibrations. A Pearson correlation, r for PPV against vehicular masses at distance of one meter from the road yielded r = 0.97 and 0.83 for power plants. This is indicative of a strong positive linear relationship between the masses of vibrating source against PPV. Results from the 16 locations used for the study show that PPV lies between 0.03mm/s to 0.05mm/s which is below the existing vibration criteria for the collapse of building structures in Nigeria. The threshold value for continuous vibration being 2.50mm/s.

Keywords: Ground Induced Vibration (GIV), Peak Particle Velocity of vibrations (PPV), Vibraloc, Correlation Coefficient, Machine Induced Vibration, Traffic Vibration.

 

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