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201800874
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Last modified
12/9/2019 6:44:22 PM
Creation date
2/12/2018 3:11:51 PM
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DEEDS
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201800874
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3.1 VIBRATORY HAMMER <br />The vibratory hammer that would be used on this project is an MKT V -5C with the following <br />specifications. <br />• Driving Force 53 Tons <br />• Frequency 1,700 CPM <br />• Eccentric Moment 1,300 In -Lbs <br />• Net Weight 7,200 Lbs <br />From BSI British Standards Institution. Code ol'Practice fbr Noise and Vibration Control on <br />Construction and Open Sites - Part 2: Vibration. BS 5228 - 2:2009 Table E.1 we are given the <br />simplified equation for resultant PPV. in millimeters per second for Vibratory Piling as: <br />k„ <br />ores = X d <br />Where: o resultant PPV <br />k„= scaling factor (and probability of predicted value being exceeded) <br />k„= 60(50 %) <br />Ic 126(33.3 %) <br />k 266(5 %) <br />x= horizontal distance in meters <br />6 =1.3 (all operations) <br />201800874 <br />So with x = 1.524 m for the South abutment <br />k 266(5 %) <br />6 =1.3 (all operations) <br />We end up with a PPV for the South Abutment of 153.82 mm/s which would be significantly <br />above the threshold of PPV =15 min's for continuous operation <br />At the North abutment we would have x= 13.716 m and all other values being equal the <br />PPV = 8.841 mm/s which falls below the threshold value of PPV =15 mints <br />)1.V <br />5 <br />
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