Environmental Engineering Reference
In-Depth Information
Figure 16.16.
Sliding friction shear strengths of concrete with lift joints - USA dams built after 1940
(Khabbaz and Fell, 1999).
Figure 16.17.
Sliding friction shear strengths of concrete with lift joints - USA dams built before 1940
(Khabbaz and Fell, 1999).
towards the sliding friction strength. It is suggested that the EPRI (1992) data be used
along with
Figures 16.15
to
16.18
to estimate the strength. Where it is critical, or there
are weak lift joints, laboratory tests should be carried out.
16.5
STRENGTH OF THE CONCRETE-ROCK CONTACT
EPRI (1992) report on direct shear tested one on the concrete-rock contact. They indicate
that peak friction angles are large, typically 54° to 68° at low stresses.
Khabbaz and Fell (1999) plotted the available data which is shown in
Figures 16.19
