13 Elastic Wave Propagation Modeling During Exploratory Drilling …
173
Fig. 13.1 Scheme of simulation area
Table 13.1 Elastic
characteristics of described
layers
Medium
P-wave speed
(m/s)
S-wave speed
(m/s)
Density
(kg/m 3 )
Ice
3940
2493
917
Water
1500
–
1025
Seafloor
1806
316
2000
Sedimentary
rock
2250
1000
2000
• Drill impact. When drilling from ice island, the drill passes to a depth of 20 m,
where it creates a point impact on the soil (Fig. 13.1). The work simulates the
propagation of elastic waves generated by such an action.
• The impact of earthquakes. A plane wave as an earthquake wave is simulated
from the depth. The stability of the ice island to its effects is studied.
• Exposure to static load (Fig. 13.2). On the island, there is a structure measuring
5 m × 5 m and weighing 5 tons. The loads on the ice island of this structure are
calculated, as well as the limit values of the load parameters at which the island
begins to collapse.
Fig. 13.2 Scheme of building location on ice island
173
Fig. 13.1 Scheme of simulation area
Table 13.1 Elastic
characteristics of described
layers
Medium
P-wave speed
(m/s)
S-wave speed
(m/s)
Density
(kg/m 3 )
Ice
3940
2493
917
Water
1500
–
1025
Seafloor
1806
316
2000
Sedimentary
rock
2250
1000
2000
• Drill impact. When drilling from ice island, the drill passes to a depth of 20 m,
where it creates a point impact on the soil (Fig. 13.1). The work simulates the
propagation of elastic waves generated by such an action.
• The impact of earthquakes. A plane wave as an earthquake wave is simulated
from the depth. The stability of the ice island to its effects is studied.
• Exposure to static load (Fig. 13.2). On the island, there is a structure measuring
5 m × 5 m and weighing 5 tons. The loads on the ice island of this structure are
calculated, as well as the limit values of the load parameters at which the island
begins to collapse.
Fig. 13.2 Scheme of building location on ice island