21-09-2012, 02:46 PM
Design of Sheet Pile Walls
1Design of Sheet.pdf (Size: 841.82 KB / Downloads: 852)
Introduction
Purpose
The purpose of this manual is to provide guidance for
the safe design and economical construction of sheet
pile retaining walls and floodwalls. This manual does
not prohibit the use of other methods of analysis that
maintain the same degree of safety and economy as
structures designed by the methods outlined herein.
Definitions
The following terms and definitions are used herein.
a. Sheet pile wall: A row of interlocking, vertical
pile segments driven to form an essentially straight wall
whose plan dimension is sufficiently large that its
behavior may be based on a typical unit (usually 1 foot)
vertical slice.
b. Cantilever wall: A sheet pile wall which derives
its support solely through interaction with the surrounding
soil.
c. Anchored wall: A sheet pile wall which derives
its support from a combination of interaction with the
surrounding soil and one (or more) mechanical devices
which inhibit motion at an isolated point(s). The design
procedures described in this manual are limited to a
single level of anchorage.
d. Retaining wall: A sheet pile wall (cantilever or
anchored) which sustains a difference in soil surface
elevation from one side to the other. The change in soil
surface elevations may be produced by excavation,
dredging, backfilling, or a combination.
e. Floodwall: A cantilevered sheet pile wall whose
primary function is to sustain a difference in water
elevation from one side to the other. In concept, a
floodwall is the same as a cantilevered retaining wall.
A sheet pile wall may be a floodwall in one loading
condition and a retaining wall in another.
f. I-wall: A special case of a cantilevered wall consisting
of sheet piling in the embedded depth and a
monolithic concrete wall in the exposed height.
g. Dredge side: A generic term referring to the side
of a retaining wall with the lower soil surface elevation
or to the side of a floodwall with the lower water
elevation.
h. Retained side: A generic term referring to the
side of a retaining wall with the higher soil surface
elevation or to the side of a floodwall with the higher
water elevation.
Coordination
The coordination effort required for design and construction
of a sheet pile wall is dependent on the type
and location of the project. Coordination and cooperation
among hydraulic, geotechnical, and structural
engineers must be continuous from the inception of the
project to final placement in operation. At the beginning,
these engineering disciplines must consider alternative
wall types and alignments to identify real estate
requirements. Other disciplines must review the proposed
project to determine its effect on existing facilities
and the environment. Close coordination and consultation
of the design engineers and local interests must be
maintained throughout the design and construction process
since local interests share the cost of the project
and are responsible for acquiring rights-of-way, accomplishing
relocations, and operating and maintaining the
completed project. The project site should be subjected
to visual inspection by all concerned groups throughout
the implementation of the project from design through
construction to placement in operation.