Environmental Engineering Reference
In-Depth Information
Cap
Existing
ground
1" pipe
Borehole
Backfill
1/4" pipe
Bottom of
borehole
1" pipe coupling
with left-hand
thread for anchor
(supplied)
46"
(as shipped)
Maximum expected
movement
Left-hand
thread
Borros anchor
Prongs
extended
14"
FIGURE 4.14
Borros point.
Tip elevation
Cross-Arm Device
Application
Cross-arm devices are installed at various elevations in earth dam embankments to pro-
vide measurements of embankment compression (USBR, 1974).
Instrument
Cross arms, fabricated of 3-in. metal channels, are installed at 10-ft intervals (or some other
spacing) and connected by metal pipe as the embankment is raised. The final assembly is
illustrated in Figure 4.15. The bottom section is grouted into the dam foundation.
 
Search WWH ::




Custom Search