Environmental Engineering Reference
In-Depth Information
Mole tracks
(a)
Normal-slip fault
Step scarps
(tension cracks)
(b)
Reverse-slip fault
FIGURE 6.61
Block disgrams showing the effects of surface displacement during fault movements. A strike-slip component
in either direction results in either a normal-oblique slip or a reverse-oblique slip. (a) normal-slip fault; (b)
reverse-slip fault. (From Taylor, C. L. and Cluff, L. S., P roceedings of ASCE, The Current State of Knowledge of
Lifeline Earthquake Engineering, Special Conference, University of California, Los Angeles, 1977, pp. 338-353. With
permission.)
They present weakness zones in tunnels and potential failure zones in slopes or concrete
dam foundations or abutments.
6.5.5
Investigation Methodology Summarized
See also Section 11.5.3.
Terrain Analysis
Remote-sensing imagery and topographic maps are interpreted to identify lineaments and
other characteristic fault landforms and drainage features evident on small scales.
Interpretation of low-level imagery, such as aerial photos at scales of 1:10,000 and 1:25,000,
 
Search WWH ::




Custom Search