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1. What is a
Walled Steel Pipe Pile?
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Walled steel pipe pile, often called "steel
pipe sheet pile", refers to a wall erected by joining
steel sheets. It has a wide range of applications
including quay walls, breakwaters, shoring, piers, closing
dikes, and so forth. Steel pipe sheet piles are
best suited for putting up walls in deep water
or on soft soil because the piles are driven into the
target depth from a pile driving boat. |
2. Usage
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Port Works
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Used in building wall structures
that can withstand strong soil pressure, such
as quays, shore protections, and breakwaters.
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Civil Engineering Works
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Used for civil Civil Engineering
works involving bridges, roads and railways
where abutment or walls are needed to support
strong vertical load and lateral earth
pressure.
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Underwater Works
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Used in building a temporary
closing dyke for the foundation construction
of artificial islands or piers.
Generally used in putting up
a wall that can sustain strong water pressure
during underwater constructions.
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3. Features
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1) Reasonable and economical design
2) High steel strength and excellent section capacity
3) Strong support against vertical and horizontal load
4) No additional wall weight per unit width even for
large-diameter piles
5) Able to penetrate most ground types and secure strong
supporting power
6) A variety of wall shapes
7) Unrestricted wall height
8) Easy construction and reduced construction period
9) Safe and sound construction due to excellent waterproofing
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4. Specifications
Type
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(a)P-P type
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(b)P-T type
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(c)L-T type
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Classification
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Dimension (mm)
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Joint
Tension Test (t/m)
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Characteristics
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L-T type
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L: 65x65x8t
T: 125x9x12
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50
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Joint tensile strength is high
but joint grouting is impossible.
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P-T type
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P: Ø165.2x9t
T: 85X76X9X9
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33
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Joint tensile strength is good
and joint grouting is possible, too.
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P-P type
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P: Ø165.2x11t
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17
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Easy joint grouting, high water
cut-off
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Design Method
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Tie Rod
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The anchor linked
to tie rod and the passive earth pressure are
designed to take on the soil pressure and residual
water pressure. |
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Cantilever
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Passive earth pressure is
designed to hold off the active soil pressure
and residual water pressure. Most suited
to this design method are steel pipe sheet piles
with section modulus strong enough to support
horizontal load. The pile length for burial
is determined by the degree of support against
active earth pressure and water pressure or
by the range of allowable horizontal bearing
force. |
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Economic Aspects
The overall construction cost of
a design involving steel pipe sheet pile stands at around
84% of conventional design.
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