Civil Engineering Reference
In-Depth Information
FIGURE 3.13
Surface fault rupture and roadway damage associated with the Chi-
chi (Taiwan) earthquake on September 21, 1999. (
Photograph from the USGS
Earthquake Hazards Program, NEIC, Denver.
)
3 m (10 ft). Water from the Gulf of Izmit flooded inland, and several thousand people
drowned or were crushed as buildings collapsed in Golcuk. Figures 3.14 to 3.18 show sev-
eral examples of the flooded condition associated with the regional subsidence along the
extension zone.
It is usually the responsibility of the engineering geologist to evaluate the possibility of
regional subsidence associated with extension zones and rift valleys. For such areas, spe-
cial foundation designs, such as mat slabs, may make the structures more resistant to the
regional tectonic movement.
