Geology Reference
In-Depth Information
Figure B5-1.1 View of left abutment of Queen
'
s Valley Dam, Jersey, UK, under construction.
Example 2
The Simsima Limestone is the main founding stratum in Doha, Qatar, and is found extensively across the
Middle East. It is a highly heterogeneous stratum including calcarenite, dolomite and breccia. The rock is
often vuggy and re-cemented with calcite. RQD can be very high, with sticks of core a metre or more in
length without a fracture; elsewhere the RQD is zero. An example is shown in
Figure B5-1.3.
The properties of the stratum are clearly important for design of foundations and for other projects
such as dredging, as discussed in
Chapter 3.
UCS test data tend to be very scattered, in part because the
integral
flaws in many samples lead to early failure. If a strongly indurated sample with few
flaws is tested,
