1 scope
This standard is mainly used in industrial
and civil construction shaped of situ frame-shear wall structures combined
steel formwork installation and removal.
2 construction preparation
2.1 materials and equipment:
2.1.1 setting combined steel formwork: length
600, 750, 900, 1200, 1500mm; width of 100,
150、200、250、300mm。
2.1.2 steel die: die, die connection of yin
and Yang.
2.1.3 connector: u-shaped, l-shaped pin, 3
fastener, disc-shaped fasteners, bolts, hook bolt, bolts, etc.
2.1.4 supports: column collar, train on an
empty stomach of steel cord, steel pillars, steel braces, steel truss, wood,
etc.
2.1.5 steel formwork and accessories should
be strict, unqualified may be used. Repaired and shall conform to the
requirements of the quality standard of the template.
2.1.6 release agent: should not use waste
oil.
2.1.7 axes, saws, wrenches, drill drill,
wire pendant, on foot, feet, crowbars, iron levels, and so on.
2.2 operating conditions
2.2.1 template design: according to the
types and characteristics of engineering structure and site conditions, design
the template to determine the template layout, and vertical and horizontal
frame specifications, quantity, rank, size, type and the selection of column
Stirrup spacing and beam support spacing, form templates (in place assembled or
precast), connection detail. Checking templates, and support the strength,
rigidity and stability. Draw a full set of template designs (templates Graphic
diagram, block diagram, Assembly diagram, node detail drawing, machining). Template
number should be divided by water in template design, conduct a comprehensive
study and determine the proper preparation of the template number.
2.2.2 precast:
2.2.2.1 installation site should lay flat,
conditional permission should be assembled operating platform.
2.2.2.2 assembled by template designs, each
of two adjacent plates with u-shaped clamp, keel to hook head bolt outer
cushion-shaped fastener and the flat edge ribs Conca tight.
2.2.2.3 template columns, shear walls
during installation, cleaning or Grouting should be set aside.
2.2.3 after assembling the template number
and paint release agents, specification pile up.
2.2.4 axis of good, template lines,
horizontal control elevation leveling layer of cement mortar should be done by
the end of the template, check and correction, anchor is embedded in the posts
well.
2.2.5 pillars, wall reinforcement, and
utility lines and embedded parts installed, strap reinforcement pad and finish
hidden procedures.
3 operational processes
3.1 Installing the column template:
3.1.1 technological process:
Elastic column Pier → line → screed
positioning posts → template → an Zhu hoop God rods or braces → pre-screening
3.1.2 according to elevations well cement
mortar screeds, line positioning abutment by position, in order to ensure
accurate line and elevation of the column axis, or follow the line, column the
main bars on the sides 5~8cm from welding rods, four against the template to
prevent displacement.
3.1.3 install formwork: a row of column,
both ends of the first column, after the adjustment, fixed, Latrun line
correction between the columns. Templates by post size, into a (a side with a
cornea), or on both sides, after the first and main bar tie wire a temporary
fix, using both sides of the u-shaped card template connecting clamp, two an
additional two templates are installed.
Hoop 3.1.4 Installing column: column collar
made of angle steel, steel pipe and so on, using wooden templates available
bolts, steel wood wood hoop. Column Clamps the die size, lateral pressure,
determine the dimensions column Stirrup spacing in the template design.
3.1.5 installation lever on the column form
or raking: column form with 2 levers on each side, fixed in advance within the
embedded in the floor reinforcement ring, using theodolite control and
verticality with a TURNBUCKLE adjustment correction template. Tension Rod angle
is 45 ° with the ground, embedded steel ring and column 3/4 column from
suitable for high.
3.1.6 post mould cleaning, closed cleaning
handle column form pre-screening.
3.2 Installing the shear wall template:
3.2.1 the process flow:
One side door openings template → line → templates → Templates → resize fix
on the other side → pre-screening
3.2.2 lines installed by position openings
template, buried under pieces of wood or brick.
3.2.3 side templates assembled in advance
according to the position line is in place, then install the tie rod or braces,
an plastic bushings and bolts through walls, wall bolt sizes and spacing should
be clearly defined in the template design.
3.2.4 sweeping wall of debris, an template
on the other side, again, adjust the diagonal bracing (lever) after the
template vertically, tighten the bolts through walls.
3.2.5 template after installation is
complete, check fasteners, bolts are fastened, templates, seam and wanting
tight, through pre-screening procedures.
3.3 Installing the beam template:
3.3.1 processes:
→ Line → column → adjust elevation end of mounting beam steel → mode → tie beam
installed lateral mode → pre-screening
3.3.2 post removal pop up on the concrete
after axis and the horizontal.
3.3.3 before installing the steel pillars
(such as earth ground must concentrate), the pillars underlying source for the
long hand. Beam bracing strut with single row, when the beams can be used two
or more rows, spacing pillars should be specified by the template design, under
normal circumstances, distance to 60~100cm is appropriate. Pillar above the pad
10cmx10cm timber, pillar bi-directional shear force braces and horizontal tie,
50cm set up off the ground, more every 2m which is situated.
3.3.4 adjusted for elevation elevation of
pillars, and then install the beam and floor, and pull straight beam and floor
should be arched, and when the span is equal to or greater than 4m, beam and
floor as designed arch. Design requirements, spring height appropriate to the
length of 1/1000~3/1000.
3.3.5 steel banding, inspected upon hidden
inspection, and debris removal, installation template, connected with the
u-shaped card template on both sides and floor.
3.3.6 in hanger or a tripod supporting
fixed beam side templates. Joist spacing should be specified by the template
design, generally should be 75cm, formwork and catchy setting clamp for fixing.
When the beam height exceeds 60cm, the wear beam bolt.
3.3.7 calibration beam lines, elevations,
section size after installation. Clean up the clutter within the formwork,
after passing the check run preflight.
3.4 Installing the floor template:
3.4.1 process:
Ground compaction → column → shop → template → keel
elevation correction
Plus pole horizontal rod and run preflight
3.4.2 earth ground should be compacted and
pad work long hand, ground floor hand pad through a vertical pillar before
long. Multi-tier support model, props should be normal, upper and lower pillar
should be in the same vertical centerline.
3.4.3 from side side to begin the
installation, first row of the first keel and pillars, temporary fix;
second-row keel and pillars, in order by row installed. Pillars with joist
spacing should be designed according to the template provided. General support
spacing for the 80~120cm, joist spacing is 60~120cm, smaller joist spacing of
40~60cm.
3.4.4 adjusting the pillar height, frame
leveling.
3.4.5 Pu setting combined steel formwork
block: you can start laying from one side, each rib between two plates
connected with the u-shaped card, u-card installation spacing shall not exceed
30cm (that is, every other hole one). Every u-shaped clamping should be
directed to alternate, not in the same direction. Large size slabs on the area
should be used stereotyped combinations of steel template block, put together
to sew patchwork templates or wood instead of narrow dimensions that are
available, but should be put together to sew tight.
Banpu 3.4.6 platform after the elevation
using a level gauge template, correct, using the leveling feet.
3.4.7 in colleges and universities after
the pillar between the horizontal lever. According to the pillar height
horizontal tie several road. General 20~30cm from the ground, to the vertical
and horizontal directions on every 1.6m together, and you should always check
and ensure full and firm.
3.4.8 template clutter within a clean and
positive.
3.5 template removal:
Template priority should be removed as a
whole, overall transfer, repeat the installation as a whole.
3.5.1 the post template removed: removed
column lift rod or brace, remove column clamps, u-card connected each column
template removed, then used crowbars to pry gently template make a template
with the concrete from.
3.5.2 wall template removal: remove wall
bolt accessories such as, then remove lift rod or braces, using crowbars to pry
gently template make a template out of the wall, hanging the template removed.
3.5.3 floor slab, the formwork removal:
3.5.3.1 should be split-beam side-mode,
then dismantled floor template, split level floor template to remove the lever,
and then remove pillars, each keel 1~2 pillar temporarily removed.
3.5.3.2 operator stations in the space has
been removed, remove the remaining pillar near, its keel free fall.
3.5.3.3 hook hook under the template, the
template after the full release of that paragraph, set out, focus stacking.
3.5.3.4 height, when using double-bent,
first remove the upper frame, keel and landed on the bottom shelf of the
template, the upper steel after all out, then remove the bottom shelf.
3.5.3.5 wall bolt, pull down wall bolt and
hanger bracket, then removed Liang Dimo.
3.5.4 template (including wall formwork)
demolition, concrete strength to ensure its surface and cord point without
removing templates from damage, can be removed. Stripping strength design of
plate and beam provided shall comply with the provisions of the code.
3.5.5 template removed cleared up
adhesions, coating release agent, remove the fastener of centralized collection
and management in a timely manner.
3.5.6 stripping non-template directly when
dropping from a height, in order to prevent deformation and damage template.
4 quality criteria
4.1 project: template and bracket must have
sufficient strength, rigidity and stability area of the supporting parts should
be adequately supported. If installed in on soil, soil must be solid and
drainage measures. Measures of frost heave soil must have a freezing and
thawing.
4.2 Basic project template seams should not
be leakage. Formwork and concrete surface cleaning and coating release agent,
steel and concrete stain release agents is strictly prohibited at the Cha.
4.3 allowable deviation is shown in table
4-2.
Template installation and embedded parts,
set aside the hole tolerance table 4-2
Tolerance (mm)
Single-layer multilayer frame
Columns, walls, 5 3 feet of beam axis
displacement check
Elevation ± 5 or cable and standard +2-5
level checking
Wall, column, beam section dimensions +4-5
+ 2-5 ' check
2m 3 3 vertical layer of care with Board
examination
Two adjacent plates song low 2 to 2 with a
ruler and the ruler check
Surface roughness 5 5 2m m on foot and
wedged feeler Gage check
Embedded, reserved hole center line of
steel plate, embedded displacement of 3 3
Center line 2 2
Exposed length +10 0 +10-0
Linear displacement of the Centre of 10 10
Section size +10 0 +10 0
5 finished product protection
5.1 light up when the installation template
with care, no collisions, prevent template variants.
5.2 dismounting without hard hard hit with
the hammer or crowbar to pry, so as not to damage surface of concrete and cord
angle.
5.3 removing the steel template if template
is found in a normal or damaged ribs deformation should be repaired in a timely
manner.
5.4 dies used in the process should
strengthen management, specification stack time brushing rust inhibitor.
6 quality problems to be noticed
6.1-column template is prone to problems:
section size allowed, the concrete cover is too large, column-body distortions.
Prevention approaches are: mode before playing the position line, calibration
bars, pillar plate about the pillars should be done before the template and
ensure bottom locations accurately. According to the posts section dimensions
and height hoop design column size and spacing, column corners support and
lever.
6.2 beam and plate template is prone to
problems: Liang Shen deflection, beam and uneven, side bulge, beam, beam head
size large men scratch. Prevention by: beams and formwork shall be determined
by the design keel, prop size and spacing, making the template has enough
strength and rigidity of the support system to prevent the template deformation
in concrete. Templates should be at the bottom of the pillar on a solid ground,
mat work long hand, prevent pillar sink, beams and formwork shall be according
to design requirements, and prevents excessive deflection. Formwork upper lever
lock, preventing easy deformation.
6.3 wall template is prone to problems:
wall thickness of concrete is inconsistent, section is not accurate. Stitching
loose, asymmetrical figure caused by too large to run pulp. Templates should be
designed according to the height and thickness of the wall through, determine
the size and spacing of vertical and horizontal keel, wall bracing method, die
form. Template head should be Rachel, prevent the upper size is too large.
Others see "casting formwork for shear wall structure".
7 quality records
This standard shall meet the following
quality records:
7.1 templates section pre inspection
records.
7.2 template project quality assessment
information.
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