Pre installed short to the plate with a
circular hole
1 scope
This technology is applicable outside the
brick and concrete structure, brick mold, plate mode, frame structure
prestressed concrete hollow plate (long and short).
2 construction preparation
2.1 materials and equipment:
2.1.1 prestressed plate with a circular
hole: there should be no cracks, warping, and other defects. Product should
comply with the quality requirements, should have a factory certificate.
Country license components, products should be required to have the license
number.
2.1.2 cement: the label over No. 325 of
slag Portland cement and ordinary Portland cement and Portland cement. Cement
factory certificate, required for the second interview.
2.1.3 sand: sand.
2.1.4 tools: steel Board, pry, casing, pipe
supports, 100mmx100mm wood pillars, tools, hard frame formwork fixture, and so
on.
2.2 operating conditions
2.2.1 plate with a circular hole into
stacked in a specified place, piling yard should be flat and solid, 300mm wood
close to the rings or distance plate, align the wood, there shall be no corner
slabs, stacking height of no more than 10 blocks. Different panels, piled up.
2.2.2 floors before installation according
to the design drawings, check, and check the quality of the plate with a
circular hole, deformation, breakage, damages shall not be used.
2.2.3 extreme hole, by Han 50mm before they
go out M2.5 mortar Grouting. Installing the front should check whether well
plugging. Mortar from the extreme distance to 60mm. Pre-short end anchor plate
with a circular hole plate stiffened (bearded wheat), casing should be
straightened out, bent 45 ° bend, bend not into a dog leg to prevent faults.
2.2.4 component if there is damage, but
through the reinforcement of fair use, and design joint research on reinforcing
measures and changes after negotiated procedures only allow installation.
3 operational processes
3.1 process:
Screed or hard Board frame formwork → line → lifting
floor → adjust → tying or welding anchor bar
3.2 screed or rigid frame formwork: plate
with a circular hole before installation clean the top of the wall or beam,
checking the elevation and axis dimensions, according to the design
requirements of cement mortar screeds, thickness for 1.5~20mm, with the ratio
of 1:3. In the in-situ concrete wall mounting plate with a circular hole,
General wall concrete strength reached more than 4MPa, installed. Installation
plate with a circular hole or by using frame formwork methods: by the end of
the elevation of 100mx100mm wood with steel or wooden pillars supporting the
load-bearing wall, above the party bearing slab of wood to the straight, steel
or wooden pillar bottom pad through long hand, Poles root wood wedge back to
ensure slab elevation.
3.3 line of position: in a load bearing
wall or beam of prestressed concrete hollow plate side, according to design
drawings and drawing board seam line should be marked on the beam or wall plate
model, press design open seams between plates with a circular hole, when design
provided, Board width is generally 40mm. Joints wider than 60mm, shall be
reinforced according to design requirements.
3.4 lifting floor: uniform force lifting
requires the lifting point, surface level, avoiding torsional warping cracking.
Such as walls with cement mortar screeds, sprinkled on the floor before a wall
or beam lifting pigment slurry (water/cement ratio 0.45). According to the
design drawings to check the wall plate number is correct and accordingly may
not be misplaced. Line end alignment during installation, slowly decreased
after the stand allows decoupling.
3.5 adjust position: lever toggle plate
end, plate ends up wall length and distance between plates in accordance with
design drawings.
3.6 tying or welding anchor bar: short
Board, will end out of a sheet anchor bar (bearded wheat) collated and bend
into a 45 ° bend and cross each other. Tie 1 φ 6 connection bars at the
intersection. Joints should not be less than 40mm, is greater than 60mm, shall
be reinforced according to design requirements. Is strictly prohibited on the
anchor bar bent under 90 ° or to the Board. Bent anchor bar bushings when slow
bend to prevent bending and breaking. If he is to board a long time, after
installation according to drawings will be welding anchor bar, 1 φ 12 long
bars, end each plate out of the prestressed steel plate end out of a sheet
steel with another isolated spot, but at least every Board spot 4. Meet the
requirements of specification for welding of welding quality.
4 quality criteria
4.1 project:
4.1.1 hoisting strength must conform to the
design requirements, such as when there is no requirement, should not be lower
than the design strength of 70%. Check the widget factory certificate.
Type, location, point 4.1.2 component
anchoring must comply with the design requirements and no damage. Check the
lifting records.
4.2 Basic project:
4.2.1 elevation, slurry, end plug holes,
seam width should comply with the design requirements and the provisions of the
code.
4.2.2 welded joints smooth surface, no
dents, weld, and weld length to meet the requirements, the joints free of
cracks, pores, inclusions and undercuts.
4.2.3 allowable deviation
Floor shelving length: ± 10MM standard
check.
Small floor surface height difference:
Plaster 5mm
Don't plaster 3mm
5 finished product protection
5.1 at the plate with a circular hole in
the transport and stacking of different panels should be stacked. Stacking ground
leveling and tamping, stacking plates and when there is a gap between the
ground and drainage measures, transportation Board assembling firm, in case of
moving, jumping, or dumping, both on the plate and concrete at rope contact,
gasket should be used to protect it.
5.2 structure of concrete wall when
installing the floor, under normal circumstances, concrete strength in wall
4MPa above, installed floor.
5.3 short to the pre on the plate with a
circular hole, which allowed rejection digging smaller holes, and continuously
break two ribs, gently scrape, and must not damage the rest of the Board; when
you need to tick a lot of holes in the plate, should be invited to designers to
calculate and reinforcement. For the long boards are also only allowed
rejection of small holes and not hurt and the main bar, if there are
difficulties, should be invited to designers to calculate the relative
reinforcement.
5.4 anchorage plate with a circular hole
reinforced to properly protect, no bending or breaking.
5.5 after you buckle the plates and middle
of the Board should be supported to ensure construction safety and installation
quality of the floor.
5.6 installation floor must not tread on
the beam.
6 quality problems to be noticed
6.1 Installing the unqualified floor:
before you install the floor not only to check the certificate, you should also
check for cracks or other defects. Prevention is in place and found not qualified.
6.2 end of lap length in the bearing is not
enough: installation not allowed, pull both ends of lap length. Or feel free to
move the panels after installation.
6.3 floor blind stitch: not according to
the design drawings before installation drawing width line; hoisting without
cable in place other people feel free to move the Board, blind, will cause the
floor joints.
6.4 lap false floor and support: gusset
plate should be checked before the wall elevations, good mortar screed, lining
of water the mud during pulping.
6.5 plug hole too shallow and floor
anchorage bar broke: check the holes before buckle-blocking design
requirements. Short plates anchoring stiffened to straighten out, in accordance
with the regulations tying rebar to prevent under pressure into the wall, long
to the welding of plate anchorage reinforcement in accordance with the
regulations.
7 quality records
This standard shall meet the following
quality records
Certificate or test report 7.1 quality
steel.
7.2 steel mechanical test reports.
7.3 widget factory certificate.
7.4 certificate of welding electrode
factory.
7.5 prefabricated lifting records (pre
inspection records).
7.6 components install section for quality
inspection and assessment records.
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