Volume No. 7 Issue No.: 1 Page No.: 116-122 July-September, 2012

 

A SUCCESSFUL CASE STUDY OF NEW APPLICATION OF MODIFIED FILLED-TRENCH TO ATTENUATE GROUND-BORNE VIBRATION

 

Shirali Gholam Abbas*1 and Rafiei Masoud2

1. Department of Occupational Health Engineering School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz (IRAN)
2. Research Center of Tehran University of Medical Sciences, Tehran (IRAN)

 

Received on : March 05,2012

 

ABSTRACT

 

Lot of people are very exposed to the vibrations in their workplace or residential areas. Major impacts of vibration are ground vibration and eroding constructions, people suffering and other negative effects. However, this paper purposes a successful case study of new application of filled trench to eliminate induced vibrations result from oxygen compressors using an in-filled trench in the administrative building of the steel plant. In order to assess the effects of vibration in the building where is overshadowed with vibration resulting from compressors, 14 points were determined and vibration was measured in those points. The measurements showed that the vibration values were above fatigue decreased proficiency boundary and at some points were above the exposure limit. Therefore, to reduce the vibration there was applied an in-filled trench with 3m deep, 2.5 m wide and 30 m long at distance of 10 m from compressors room. The performed measurements before and after the trench digging have shown that an attenuation between 5.64 to 27.8 dB can be obtained. Therefore, this method reduced the vibration through below the standard level and eliminated personnel discomforts resulting from vibration.

 

Keywords : Vibration, Attenuation, Trench Barrier, Measurements, Compressors

 

 

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