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5.2.3.3
Driving ram (diesel hammer)
If the driving ram (diesel hammer) is selected the following dialog box opens:
The input corresponds to the input for vibrating pile drivers (see Section 5.2.3.2).
The predominant soil type is entered for "Soil". Three soil types are differentiated:
• Cohesive soils
• Gravels, sands
• Stones.
This input is important for analysis of the resulting ground vibration acceleration aGround,R according to Equation 9.1 and Table 9.2 in Bulletin 61. The building settlement hazard can be assessed
using the resulting ground vibration acceleration aGround,R. The allowable value, including for soils
susceptible to collapse, is:
aGround,R ≤ 1/3 · g = 3,300 mm/s² = 3.3 m/s²
The program issues a warning message if the allowable values are exceeded.
For computation of the resulting ground vibration acceleration aGround,R "soft or loose ground" and
"very firm or dense ground" are differentiated according to Table 9.2. This setting is made in
"Ground is".
GGU-VIBRATION User Manual
Page 13 of 30
June 2011