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). Templatenumber 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, strapreinforcement 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 abutmentby 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 orgreater 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 thearea 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, usingthe 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 templatevariants.
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 anduneven, 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 runpulp. 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 toolarge. 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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