Brick and concrete structure column and ring beam and slab formwork technology

1 scope

This standard is mainly used in industrial and civil buildings outside the brick and concrete structure, brick mould and die within the outer structural column, ring beam and slab formwork.

2 construction preparation

2.1 materials and equipment:

2.1.1 boards (thickness of 20~50mm), and combined steel formwork (length 600, 750, 900, 1200, 1500mm with a width of 100, 150, 200, 250, 300mm), die, die connection of yin and Yang.

2.1.2 timber, wooden wedges, support (wood or steel), stereotypical combined steel formwork of attachment (u-shaped, l-shaped plug, 3-fastener, saucer-shaped fasteners, bolts, hook bolts, bolts), the wire (12th, ~14) and separator, and so on.

2.1.3 holes with an electric drill, moving hands, a pair of pliers.

2.2 operating conditions

2.2.1 play wall +50cm horizontal lines, check the brick wall (or concrete) whether the location of the break line, go through the preflight procedures.

2.2.2 structural column reinforcement is complete and well hidden procedures.

2.2.3 form tie bolts through walls, masonry should be reserved bolt holes as required.

2.2.4 checking whether the interior structural columns to clean, including tongue gray brick walls, steel hanging on the mortar and the floor at the bottom of gray.

3 operational processes

3.1 process:

Column template

Preparation → circle template → pre-screening

Board template

3.2 before formwork structure column and ring beam and slab debris all cleaned up.

3.3 template:

3.3.1 structure column template:

3.3.1.1 constructional column of brick-concrete structure templates, or stereotyped combined steel formwork of the wood can be used template. Available methods in General. Concrete pouring to prevent template expansion affect the exterior walls smooth, steel template paste with a wooden mould or combination on the outer wall, and every 1M to set up two, and the inner wall tie, diameter should be not less than 16. Pulled through the hole in the brick wall to leave, hole location requirements from the ground 30cm, every 1M together, plane of the holes in the structure column outside a small brick Office Ma ya Cha.

3.3.1.2 internal model structure of brick columns, connected with the die with a large template, bulge deformation of outer wall to prevent pouring concrete, reinforcement template posted on the outer walls, and then pull the grapple.

3.3.1.3 gable column internal model structure, template use wooden template or composite steel formwork, with diagonal bracing in prison.

3.3.1.4 should retain clean out the roots.

3.3.2 ring beam template:

3.3.2.1 circle template may use wooden template or combination of shaped steel formwork and catchy line level.

3.3.2.2 when using floor support beam template, the following should be mat wood when using wood backing, with a wooden wedge below tight. Steel backing, height should be adjusted to the right.

3.3.2.3 reinforcement as finished, the template head width correction, with a wooden pole position and fixed with nails of temporary. Such as the use of combined steel formwork, catchy fixture cards, and ensure the beam size.

3.3.2.4 of die structure in brick, outer tile wall beam, with horizontal pole, wall, flat position 24cm at both ends of the wall hole, spacing about 50cm.

3.3.3 Board template:

3.3.3.1 seam width is 4cm, 50mmx50mm available wood or angle for the base mould. Than 4cm should end of Board, and should be extended into the plate 5~10MM left at the end of the Groove, easy leveling of ceiling mortar after stripping.

3.3.3.2 Board template supports of wood or steel pipe support should be used, or suspenders.

Support 3.3.3.3 shall be in wood and wooden wedge below the pad, and do not use brick pad.

4 quality criteria

4.1 project: template and bracket must have sufficient strength, rigidity and stability, the support section should be adequately supported area, such as installed in on soil, soil must be solid and drainage measures. On collapsible loess must have waterproofing measures for Frost heaving soil must be freeze-thaw action.

4.2 Basic project:

4.2.1 template should be tight at the seams, should be placed firmly embedded parts, slot should not leak slurry, should be less than l.5mm.

4.2.2 template contact surfaces should be cleaned with concrete, uniform template release agent brush may not leak stain brush or steel.

4.2.3 allowable deviation is shown in table 4-1.

Brick and concrete structure template allows deviation table 4-1

Tolerance (mm)

Single-layer, multi-layer multi-storey mode

1 axis displacement: column, beam 5 5 foot check

2 elevation ± 5 ± 5 level or cable and check

3 size: +4-5 ± 2 feet of column and beam check

2m 4 3 3 vertical layer of care with Board examination

5 two adjacent surface height difference of 2 2 with a ruler and the ruler check

6 surface roughness 5 2 2m m on foot and wedged feeler Gage check

Embedded steel centre line 3 7 3 cable and check

5 finished product protection

5.1 supporting ring beam in the brick wall template, preventing the brick hit the top skin.

5.2 after completing the template should keep mold clean to prevent falling into the bricks, stone, wood and other debris.

5.3 there shall be protection of steel against disturbances.

6 quality problems to be noticed

6.1 structure column at the wall squeeze drum deformation of reinforced measures should be outer wall when the template.

6.2 expansion circle template: ring beam bracing not clamped, support not strong, catchy lever damaged or didn't nail the template firmly. Designated personnel to repair template when pouring concrete.

6.3 concrete flow: template Board is too large, not Fiberboard, wood, put in prison outside walls ring beam without template first and then pour concrete ring beam, but brick template first and then pour concrete, water flows along the mud brick.

6.4 seam sinking template: hanging template did not tighten the hanger wire, and when using steel and wood supports, supports the following wood there is no wedge nailing.

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.