3 October 2005
Table 5-5. Driven-Plate Anchor Components
Size the area and thickness of the plate to hold
the required working load in the given soils. A
plate length-to-width ratio of L/B = 1.5 to 2 is
shown by practical experience to give optimum
Size the beam to provide: a driving member;
stiffness and strength to the anchor; and to
separate the padeye from the plate to provide a
moment that helps the anchor key during proof
Size this structure as the point where the chain
or wire rope is shackled onto the anchor prior
Length and size specified so assembly can
safely be picked up, driven, and removed.
Sized to drive the anchor safely. In most cases
it is preferable to use an impact hammer. A
vibratory hammer may be used in cohesionless
soils or very soft mud. A vibratory hammer
may also be useful during follower extraction.
A structure is added to the side of the driving
platform to keep the follower in position during
setup and driving.
Installation of a plate anchor is illustrated in Figure 5-6. Installation consists of three key
steps, as outlined in Table 5-6.