Geoscience Reference
In-Depth Information
burial depth, and soil characteristics encountered in the field. Horizontal displacement
was applied externally to a pipe section in a manner that allowed unrestricted vertical
pipe movement as well as adjustments in pipe weight to replicate different contents such
as gas, liquid fuel, and water.
The experimental facility was designed to induce maximum lateral displacement of
152mm, with burial depths to 20 diameters. The experimental facility was composed
ofatestcompartment,pipeloadingsystem,instrumentationanddataacquisitionsystem,
andsoilhandlingequipment.Figures17.11and17.12showplanandprofilephotographs,
respectively, of the testcompartment.
The test apparatus consisted of a box with interior dimensions 2
5m
deep. A special collar was fabricated to fit on top of the testing apparatus (not shown
in the figure) that extended the depth of pipe burial to 2.3m. The apparatus was filled
with a false wall that was removed when deep embedment depths (pipe depth exceeding
.
4m
×
1
.
2m
×
1
.
Observation
1.5
m
Loading
Yoke for
Lateral
Horizontal
Displacement
Transducer
Counter
Pipe
Fig. 17.11. Side view of experimental facility
2.36
m
1.6
m
1.22
m
False Wall
Axle
Direction of Pipe
Displacement
Fig. 17.12. Top view ofexperimental facility
