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The construction method of
the simply and multy span preflex composits bridge by
girder's up-down(down-up) method. |
Manufacture of preflex
beam.
Manufacturing mothod (A patent number
282773)
The
typical way of producing preflex composite beam is to
make two preflex beams
simultaneously by putting one beam on the top of the loading table and the other
beam under the loading table espectively. This
time occurs across buckling prevent ross-beam that
respectively steel shape
was connected. This method is manufacture
that simultaneously more than
four beams per a time by putting load operations
of preflexion. Moreover it can reduce not only the unit cost of manufacture but also
a term of works.
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The construction method of the
simple and continuous preflex composits bridge by girder's
up-down(down-up) method. |
Manufacture processing
of preflex beam.
1) foundation of
a loading stand and steel
shape |
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2) foundation of
binding-bolt |
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3) foundation of
oil pressure jack |
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
4) establishment
of cross beam |
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5) preflexion putting load |
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6) establishment
of a reinforcing rod and a mold |
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
7) setting casing
concrete and curing |
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8) piling-up later
beam completion |
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Operate of multi-span
continuous preflex composits bridge(The
Ministry of Construction and Transportation reserved
new method, number 270) (A patent of America number 5644890,
A patent of Europe( Germany, france
and so on ten nations) number 94910059.8, A patent
of Canada number 2134644, A
patent of Australia number 679502, A patent
of Japan number 2948909, A patent of china number 64465,
A patent of the interior number
105754, 0260675 and 10-2000-054500)
An
outline 1) Operate
method of inner supports by up-down. Operate
of continuous preflex composits bridge division-manufactured
preflex beams simplicity
deferment each spans at a field, and after each beams
connecting use of connection plate, import compress
stress confrontation
negative moment after composition at inner support of
slab concrete as
pier section support of up and down, Method effectively confrontation deflection
and crack as the lower part of connection-shape
import appendix
compress stress. 2)
Operate method of both end supports by up-down In
order to danger of safety accident cause of enforce
up and down as inner support
of use expatiation inner support up and down method,
Method of gain efficient
operate up and down at both end supports nearly to foundation
a direction.
Construction
method of 2 spans continuous preflex composit beam
1. Method of
after lifting up sub-support at mid, setting floor-plate,
web and hunch
concrete at negative moment area 2.
Method of Lifting up sub-support at mid span, setting
floor-plate, web and hunch
concrete at entire a section 3.
Method of Lifting down both of end supports at a span,
setting floor-plate, web
and hunch concrete at entire a section
Construction
method of 3 spans continuous preflex composit beam
1.
Method of after lifting up sub-support at mid, setting
floor-plate, web and hunch
concrete at negative moment area 2.
Method of Lifting down both of end supports at a span,
setting floor-plate, web
and hunch concrete at entire a section 3.
Method of again lifting up sub-support at mid
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Each spans
division manufacture of preflex beam
An
outline
Division manufacture preflex
beam of each spans as B.M.D shape of continuous bridge. Circumstance
of preflex beam for outer side span is that maintain
from one side end to about locate 1/8 and then import
compress stress lower concrete of
rest section, Circumstance of preflex beam for
inner side span is that maintain from
both ends to about locate 1/8 and then import compress
stress lower concrete of rest section.
<Method of manufacturing>
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Construction
method of 2 spans continuous preflex composits beam(method
1)
Division-manufactured
deferment and connection of preflex beam(continuously) |
Lifting
up sub-support at mid span |
Setting
floor-plate, web and hunch concrete at negative
moment area |
After
stiffen of setting concrete and lifting
down a inner support |
Setting
floor-plate, web and hunch concrete at positive
moment area |
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Construction
method of 2 spans continuous preflex composits
beam(method 2)
Division-manufactured
deferment and connection of preflex beam(continuously)
|
Lifting
up sub-support at mid span |
Setting
floor-plate, web and hunch concrete at entire
a section |
Lifting
down a inner support after stiffen of setting
concrete |
Conclusion
after deferment of support |
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Construction method
of 2 spans continuous preflex composits
beam(method 3)
Division-manufactured
deferment and connection of preflex
beam (continuously)
|
Lifting down both of
end supports at a span |
Setting floor-plate,
web and hunch concrete at entire a section |
Lifting up both of
end supports after stiffen of setting concrete |
Conclusion after deferment
of support |
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Construction method
of 3 spans continuous preflex composits
beam(method 1)
Division-manufactured deferment and
connection of beam at number 1, 2 span |
The lifting up a connected number
1 inner support |
Setting and curing is floor-plate,
web and hunch concrete at number 1 negative
moment area |
Lifting down inner support of number
1 span |
After connecting of number 3 span
beam, the lifting up a connected inner support
of number 2 span |
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Setting and curing is floor-plate,
web and hunch concrete at number 2 negative moment
area |
Lifting down inner support of number
2 span |
Setting and curing is floor-plate,
web and hunch concrete at positive moment
area |
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Construction
method of 3 spans continuous preflex composits beam(method
2)
Division-manufactured deferment and
connection of beam at number 1, 2, 3 span
|
Lifting down both of end supports
at span |
Setting and curing is floor-plate,
web and hunch concrete at entire a section |
Lifting up both of end supports at
span |
Conclusion after deferment of support |
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¡¡
The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Construction method
of 3 spans continuous preflex composits
beam(method 3)
Division-manufactured deferment and
connection of beam at number 1, 2 span |
The lifting up a connected number
1 inner support |
Setting and curing is floor-plate,
web and hunch concrete at number 1 negative
moment area |
Lifting down inner support of number
1 |
Setting floor-plate, web and hunch
concrete at number 2, 3 span, and lifting
up a connected number 1 inner support again. |
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Setting floor-plate, web and hunch
concrete at number 2, 3 span, and lifting
up a connected number 2 inner support |
Curing floor-plate, web and hunch
concrete at number 2, 3 span, Lifting
down inner support of number 2 |
Lifting down a connected number 1
inner support again. |
Lifting down a connected number 1
inner support again. |
Setting and curing is floor-plate,
web and hunch concrete at number 1 positive
moment area |
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Practice operate
processing of continuous preflex bridge(3spans continuous) (Method of lifting up and down a connected
inner support) Kumjung Bridge(Pusan metropolitan
kumjung-gu dugu-dong location) First of the world operating
method of 3 spans continuous preflex composit beam is
used lifting up and down a connected inner support 2002 Asian Game Kumjung stadium
entry bridge. whole extension length :
90m(30m*30m*30m) the specifications
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Practice operate
processing of continuous preflex bridge (Kumjung Bridge ) (Method of lifting
up and down a connected inner support)
1. Manufacturing Preflex Beams and Setting the
preflex beam
2. Connecting the preflex beam number of 1, 2
span
3. The lifting up of the 1st inner supports
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Practice operate
processing of continuous preflex bridge (
Kumjung Bridge ) (Method of lifting
up and down a connected inner support)
4. Arrangement of Steel bar in the 1st negative moment
section
5. Casting slab concrete in the 1st negative
moment section
6. Down of the 1st inner supports
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¡¡
The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Practice operate
processing of continuous preflex bridge (
Kumjung Bridge ) (Method of lifting
up and down a connected inner support)
7. After connecting the preflex
beam number of 2, 3 span, lifting up number
of 2 inner supports
8. Casting slab concrete in the 2nd negative moment
section
9. Down of the 2nd inner supports
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Practice operate
processing of continuous preflex bridge (
Kumjung Bridge ) (Method of lifting
up and down a connected inner support)
10. Arrangement of Steel bar in the positive
moment section
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Practice operate
processing of continuous preflex bridge (2
spans continuous) (Method of lifting
up and down both of end supports)
Songchu Bridge(Kyunggi province Euijungbu
city Songchu loation) ·
First of the world operated use H-shape method of 2
spans continuous preflex composit
beam is used lifting up and down both of
end supports ·
Import practice camber produce plastic transformation
at H-shape Rolled Profile
· whole extension length : 40m(20m*20m)
· width of bridge : 6m
· the specifications
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Practice operate
processing of continuous preflex bridge (Songchu
Bridge) (Method of lifting up
and down both of end supports)
1. The field setting manufactured
preflex beam
2. The complete view of installing
supporter for setting end part
3. Connecting the preflex beam number
of 1, 2 span
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The construction method of the
simple and continuous preflex composits bridge by girder's
up-down(down-up) method. |
Practice operate
processing of continuous preflex bridge(Songchu
Bridge) (Method of lifting up
and down both of end supports)
4. Casting casing concrete in
the connecting section
5. The 1st shift down of the abut
6. Setting of Slab concrete form and
arrangement of Steel bar
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¡¡
The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Practice operate
processing of continuous preflex bridge(Songchu
Bridge) (Method of lifting up
and down both of end supports)
7. The 2st shift down of the abut
8. Casting slab concrete
9. Lifting up the abut
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Practice
operate processing of continuous preflex bridge
(Songchu Bridge) (Method
of lifting up and down both of end supports)
10. Setting shoe after lifting up
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Operating preflex
composits bridge of the simply span.
At
outline
Preflex-beam originate loss of
about 30¡40% that compress stress of lower concrete
is imported together with the time elapsed from manufacture
to set. Like this loss
of compress stress operate on a section increase primary
factor of whole preflex composit
shape. Consequently, In manufacture scene of near
field for restore like this loss of
compress stress and raise economical efficiency
of whole composit shape, raising so compress stress
of appendix import volume that defer preflex-beam to upward gabent of the central span then
after setting and curing part width of hunch, web concrete
and slab concrete, with removal the gabent import additional compress stress at the
lower concrete by be increase section
value and it deferment at a addition compress
stress of practice a field and a bridge staff, setting
at the rest slab concrete. this
method is expect fast operation and exactness of operate.
Simply preflex composit bridge because
of this method is gained shape-height than
simply preflex composit bridge of previous decline and
steel-volume effect of each about
10%, 20¡30% at shape-height and steel-value.
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The construction method of
the simple and continuous preflex composits bridge by
girder's up-down(down-up) method. |
Operate order
1) Deferment
preflex-beam to upward gabent |
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2) Operating
web, hunch concrete and slab concrete of
part |
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3) Remove
gabent after cure the concrete surface. |
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4) Operating
the rest slab concrete after bridge staff
deferment. |
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Section details
of A-A |
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