What are the key points of standard process of formwork engineering?

After the positioning (or lacing) of the root of shear wall and column formwork can be set out, drill φ6 or φ8 steel bar head positioning (or lacing) on the floor, and it is forbidden to weld the steel bar head on the longitudinal reinforcement of shear wall and column for lacing. Nailing the bottom plate on the outer root of the template can prevent the template at the root of shear wall and column from shifting.

Template configuration:

In any case, there shall be no less than 3 sets of top formwork and 2 sets of wall formwork. The shear wall shall not be less than "five tie rods" (calculated according to the standard height of 2.85m).

In order to prevent the root rot of shear wall and column foot, the day before concrete pouring, the template of shear wall and column foot should be sealed with mortar, which can effectively prevent slurry leakage and reduce root rot.

Prevent peripheral shear walls, stairwells from rotting roots and upper and lower joints from leaking slurry.

Suggestion: Before pouring the lower concrete, the special bolts must be embedded in the beam or wall (as shown in the figure below). When shear walls and columns are equipped with formwork, the formwork height should be 100- 150, and the formwork should be hung when supported. The bolts shall be embedded in the lower concrete or the reserved reinforcement shall be used as the bottom reinforcement of the formwork, and the double-sided adhesive tape shall be affixed within the range of 50- 100. The phenomenon of concrete dislocation and slurry leakage at the junction of the upper and lower floors can be avoided.

Concrete slab (or waist beam), constructional column, etc. Construction should be carried out according to the design requirements, and frame columns must be set on both sides of the door. Plate (or waist beam) planting bar position should be calculated accurately, planting bar should be firm, distribution bar should be bound according to the requirements of spacing, and cushion blocks should be set reasonably to ensure that longitudinal reinforcement is located in the center of plate (or waist beam); When pouring constructional column concrete, it is required that the drainage groove is uniform. In this process, the plug-in vibrator is used in conjunction with the template to ensure the vibrating compaction. After the formwork is removed, remove excess concrete to ensure the final appearance.

Concrete anti-sill formwork for bathroom, kitchen, balcony and upper part of external wall is being installed and strengthened. Using the formed U-shaped fixture, the steel bar head can be installed on the concrete floor inside the formwork, which is shaped as "internal support and external roof", which can effectively control the rigidity of the formwork and avoid the potential leakage caused by using iron wire steel bars or bricks as internal support.

Install reinforced horse stool support at the lower part of the hanging formwork at the floor elevation difference and the structure falling plate, and it is forbidden to use formwork reinforcement as support. The balcony, bathroom and other high and low parts should be formed by channel steel, which is convenient for support and demolition and is conducive to repeated recycling.

A, wall column template

Measuring unreeling:

1. Professional surveyors shall provide room control lines.

2. Team members pop up a 20cm template control line.

3. Team members pop up template positioning lines.

4, from the corner 10cm play big Angle verticality control line.

Schematic diagram of formwork reinforcement for straight wall:

1, and the screw is Ф12.

2. Nuts should be matched with screws.

3. Install the screws according to the plan.

4. Double nuts should be used in the lower three rows.

5. Stick sponge strips between flat seams.

6, wood square spacing of 200mm, conform to the requirements of the scheme.

7, template flat-fell seam with wood square compaction.

8, screw row number setting; 2.8-3.2 6 rows; 3.2-3.8 7 rows; 3.8-4.6 Row 8

9. Fix the first screw 20 cm above the ground. Set a screw 20cm away from the bottom of the board, and set a screw 20 cm away from both sides 10cm.

T-wall formwork reinforcement diagram:

1, and the screw is Ф12.

2. Nuts should be matched with screws.

3. Install the screws according to the plan.

4. Double nuts should be used in the lower three rows.

5. Stick sponge strips between flat seams.

6, wood square spacing of 200mm, conform to the requirements of the scheme.

7. Add a screw when the battlements exceed 30cm.

8, template flat-fell seam with wood square compaction.

9. Fix the first screw 20 cm above the ground. Set a screw 20cm away from the bottom of the board, and set a screw 20 cm away from both sides 10cm.

L-shaped wall formwork reinforcement diagram:

1, and the screw is Ф12.

2. Nuts should be matched with screws.

3. Install the screws according to the plan.

4. Double nuts should be used in the lower three rows.

5. Stick sponge strips between flat seams.

6, wood square spacing of 200mm, conform to the requirements of the scheme.

7. Add a screw when the battlements exceed 30cm.

8, template flat-fell seam with wood square compaction.

9. Fix the first screw 20 cm from the ground and the other screw 20 cm from the bottom of the circuit board. Set a screw on both sides from the edge 10cm.

Wall formwork installation:

1, the inside of the template coincides with the positioning line.

2, the bottom row of screws from the ground is not more than 20cm.

3, the top row of screws from the bottom plate is not more than 20cm.

4. The vertical screw (column) spacing in the basement is 400mm, the distance between horizontal screws (rows) is 200-250mm, the second spacing is 400mm to the tenth spacing, the twelfth spacing is 600mm, the thirteenth and above can be 700 mm, and the bottom seven rows of screws should be added with double nuts.

5. Standard layer: the vertical screw (column) spacing is 500mm, the horizontal screw (row) spacing is 200-250mm, the second spacing is 450mm, the third spacing is 450mm, the fourth spacing is 600mm, and the fifth and above spacing can be 700mm；; Double nuts should be added to the bottom three rows of screws.

Beam-column joint template:

Adopt 18mm thick multi-layer board to finalize the design and manufacture, and strictly control the processing size.

Template release agent:

1. Apply release agent once every two layers.

2, the wall template turnover 8-9 layer change once (depending on the quality of the template).

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