Civil Engineering Reference
In-Depth Information
FIGURE 13.17
Location where a steel column will be attached to the top of a pier.
FIGURE 13.18
Typical prestressed concrete piles; dimensions in millimeters. (
Reproduced from Bowles
1982 with permission of McGraw-Hill, Inc.
)
if the depth to adequate bearing material is believed to be 30 ft (9 m), then an indicator pile could
be manufactured 35 ft (11 m) long. Usually about 10 to 20 percent of the piles will be indica-
tor piles. The indicator piles are used to confirm embedment conditions, and thus some indi-
cator piles may be driven near the locations of prior borings, while other indicator piles are
driven in areas where there is uncertainty about the depth of the bearing strata. Once the indi-
cator piles have been driven, the remaining prestressed piles are manufactured with the lengths
of the piles based on the depths to bearing strata as determined from the indicator piles.
