What is the general spacing of the formwork support, and what is the specification for the erection

Generally, the spacing of the vertical rod is 600 1200mm, and the spacing of the horizontal rod is generally about 1. Now a lot of it is based on experience. For details, please refer to the "Technical Regulations for Fastener-type Steel Pipe Formwork Brackets for Building Construction".

The length of the vertical rod is strictly forbidden to lap, and the butt fastener must be used, and the butt joint of the adjacent two vertical rods shall not be in the synchronization, and the distance between the butt joint and the vertical staggering should not be less than 500mm, and the center of each joint should not be greater than 1 3 of the step distance from the main node.

The top of the vertical rod should be provided with adjustable support, if there is a gap between the U-shaped support and the two sides of the corrugated beam, it must be wedged, the screw rod stretches out of the top of the steel pipe shall not be greater than 200mm, the gap between the outer diameter of the screw and the inner diameter of the steel pipe of the vertical rod shall not be greater than 3mm, the outer diameter of the screw shall not be less than 36mm, and the upper and lower concentric should be ensured during installation.

The design value nut of the axial force of the upright rod section should be calculated according to the following formula:

When wind loads are not combined:

nut=ångk+ （

Combined Wind Loads:

nut=ångk+ （

where: nut— calculate the design value of the axial force of the section upright (n);

NGK — self-weight of formwork and supports, freshly poured concrete.

the sum of the axial forces generated by the self-weight and the standard value of the self-weight of the reinforcement (n);

NQK— standard value of load of construction personnel and construction equipment, vibrating concrete.

(n) of the axial forces generated by the standard value of the load generated.

Spacing of formwork bases:

Formwork: The formwork on the project only has the blocking function and a small part of the anti-deformation function, and the template must be added to the formwork outside the formwork to really make the formwork have the anti-deformation function, and the formwork fixing frame must also be added to the template, and this fixing frame is the formwork support.

According to the beam, the general situation (m) is not more than 1 meter, the beam is small (m) can not be greater than the m, the beam spacing should not be greater than the m, and the larger the beam, the smaller the spacing.

The floor slab formwork does not belong to the cold-stamping formwork.

The distance between the poles is one meter.

Your question is not clear, I don't know what you ask, we specialize in the production of cold stamping die base, let's make the question detailed!

The formwork erection specification is:

1. Sweeping rod.

No more than 20 cm from the ground, set in the vertical and horizontal directions.

2. The scissor brace is set every 4 vertical rods, and the angle is between 45-65 degrees and should not be less than 6 meters, and the scissor brace is horizontal.

Set one every 2 steps.

3. The spacing of the vertical poles: generally meters, the high span is meters, and the spacing of the horizontal rods does not exceed meters per step.

4. When the adjustable bracket is set at the bottom or top of the pole, the telescopic length of the adjusting screw should not be greater than 200mm.

5. The longitudinal and horizontal distance of the pole should not be greater than 1200mm. For the formwork support with a height of more than 8m, or a span of more than 18m, or a total construction load greater than 10kN, or a concentrated line load greater than 15kN, the longitudinal and transverse distances of the vertical rod should not be greater than 900mm except to meet the design requirements.

6. The step distance of the formwork support should meet the design requirements and should not be greater than.

7. In addition to the top of the pole, the joints of the rest of the steps must be connected by butt fasteners.

8. When the upright rod is supported on the soil, the bearing capacity of the foundation.

The force requirements should be met to prevent uneven settlement. When the requirements cannot be met, the soil should be compacted, and the stone or concrete cushion should be laid.

and other measures. 9. The formwork bracket must be provided with longitudinal and transverse sweeping rods. The longitudinal sweeping rod should also be fixed on the vertical rod at a distance of no more than 200mm from the base epithelium, and the transverse sweeping rod should also be fixed on the vertical rod immediately below the longitudinal sweeping rod with right-angle fasteners.

10. When the support mode of setting the vertical rod at the bottom of the beam is adopted, it is advisable to use the adjustable bracket seat to transmit the force directly, and the horizontal rod of the adjustable bracket and the steel pipe junction should be set up with a horizontal rod, and the height of the top of the bracket from the horizontal rod should not be greater than 300mm. The pole at the bottom of the beam should be according to the beam width.

Uniform setting, its deviation should not be greater than 25mm.

Formwork Support Specification:

1. A special construction plan should be prepared for the formwork project. The special construction plan of the sliding formwork, climbing formwork, flying formwork and other tool-type formwork projects and tall formwork support projects should be technically demonstrated.

2. The template and bracket should be designed. The formwork and support should have sufficient bearing capacity, stiffness and stability, and should be able to reliably withstand all kinds of loads generated during the construction process.

3. The specifications of steel pipes and fasteners used in the erection of formwork supports should meet the requirements of the design Liangzhou; The longitudinal distance of the vertical pole, the horizontal distance of the vertical pole, the step distance of the support and the structural requirements shall meet the requirements of the special construction plan.

Note: The formwork support structure used for concrete cast-in-situ construction in the building is generally assembled into a formwork bracket by steel or wooden beams, and a scaffold frame is built into a bracket support by using steel or wooden poles, and concrete construction is carried out with steel formwork.

There are a variety of different ways to classify templates:

1. According to the shape, it can be divided into two types: plane template and surface template.

2. According to the stress conditions, it is divided into load-bearing and non-load-bearing formwork (that is, bearing the weight of concrete and the lateral pressure of concrete).

3. According to the material, it is divided into wood formwork, steel formwork, steel-wood composite formwork, gravity concrete formwork, reinforced concrete facing formwork, aluminum alloy formwork, trembling plastic formwork, brick formwork, etc.

4. According to the structure and use characteristics, it can be divided into two types: dismantling type and fixed type.

5. According to its special functions, there are sliding templates, vacuum suction cups or vacuum floppy disk templates, thermal insulation templates, steel mold trolleys, etc.

Principle of practicability: the template should ensure that the shape of the components is correct, the weight and mutual position of the slag are correct, and the structure is simple, the support and dismantling are convenient, the surface is smooth, and the joints are tight and do not leak slurry. Security Principles:

It is necessary to have sufficient strength, stiffness and stability to ensure that there is no deformation, no damage and no collapse during construction.

When the formwork support of the inclined beam plate structure is erected, the throwing brace should be arranged, or the connecting wall piece should be connected with the surrounding components to resist the influence of horizontal load.

The requirements of the inner formwork are as follows: 1. The supporting part of the vertical formwork and the support should be added when installed on the base soil, and the base soil must be solid and have drainage measures, and there must be waterproof measures for collapsible loess; For frost heave retaining soil, anti-freeze-thaw measures must be taken. 2. During the installation process of the formwork and its support, temporary fixing facilities for anti-tilting must be set.

3. For cast-in-situ multi-storey houses and structures, the method of segmented formwork should be adopted, and the installation of the upper formwork and its support should comply with the following provisions: The lower floor slab shall have the bearing capacity to bear the load of the upper layer or be supported by supports; The column of the upper layer support should be aligned with the column of the lower layer support, and a backing plate is laid; When the suspension formwork and truss formwork support method are adopted, the bearing capacity and stiffness of the supporting structure must meet the requirements. 4. When the height between the layers is greater than 5m, it is advisable to choose truss formwork or multi-layer support formwork; When using multi-layer bracket formwork, the horizontal backing plate of the bracket should be flat, the pillar should be vertical, and the upper and lower pillars should be on the same vertical center line.

Hope it helps you and please thank you in time.

See:Building structureThe span is related to the support of the lower part of the structure.

For a beam, a clear span is the net distance from one column edge to another, while a span is the distance from one column axis to another. The plate is also, and the support of the plate is basically all kinds of beams. For formwork, such as a girder.

The span of the formwork support is the span of the beam. Beam bottom formwork: the formwork support with a support height of more than 4 meters is called the fastener-type steel pipe high support frame, and there are important omissions in the calculation specification of the high support frame, which makes the calculation very easy to have the calculation results that cannot fully ensure the safety.

Example of a beam formwork support frame

The steel pipe type used in the elevation diagram of the beam formwork support brother missing bending frame is 48, and the parameter information:

Beam segment information: L1:

Scaffolding envy frame parameters.

The vertical rod is cracked along the beam span direction spacing l(m); The upper end of the upright rod extends to the length of the formwork support point.

a(m)；Vertical rod step distance h(m); The formwork support calculates the height h(m);

The spacing between the upright rods on both sides of the beam is la(m); Load-bearing erection support: no load-bearing vertical rod, timber square parallel beam cross-section a;

Load parameters. Formwork and block self-weight (kn m2); beam cross-sectional width b(m);

self-weight of concrete and rebar (kn m3); Beam cross-sectional height d(m); Dumping concrete load (kn m2); Uniform load for construction (kn m2).

The formwork tower is set up according to the specificationTemplate engineeringSpecial projects should be preparedConstruction plan。Sliding form, climbing form, flying mold and other tool-type mold imitation board engineering andTall formworkThe construction plan of the bracket project should be technically demonstrated.

The length of the vertical rod joint should be connected by butt fasteners, and the connection between the adjacent two sections should be staggered, the joints of the adjacent two vertical rods cannot be synchronized, and the distance between the two joints of the vertical rod in the height direction should not be less than 500 mm; The distance from the center of each joint to the main node should not be greater than 1 3 of the step distance.

The structural characteristics of the outer wall circumference of the project, the outer wall perimeter is fully equipped with a layer of 200mm high hanging formwork. The method of configuring the hanging formwork, its advantage is that the pouring of the guide wall is avoided, the problem of stubble slurry leakage between layers is solved, and there is no difference between the inner and outer wall templates, and they can be used interchangeably, not only reduce the input of the template, but also improve the construction efficiency.

Attention to the erection of formwork:

The cross-sectional size is inaccurate, the column position is displaced, and the column is bent. The method is as follows: pop up the position line according to the figure before the formwork, and use wooden strips to die around (leave the thickness of the board) to ensure that the bottom position is accurate, and the template prepared according to the cross-sectional size of the column is surrounded by square wood.

Hang on all sides, lock it with hoops, and then pull the support around it.

The problems that the beam plate template is prone to produce, the beam is not straight, the bottom of the beam is uneven, and the beam mouth is not straight, and the prevention methods are: beam plate template support.

The spacing of the keel should be calculated to ensure that its strength, stiffness, and the horizontal rod of the bed die should be arched according to the requirements of the design and specifications, and the beam mouth should be locked through the line to prevent deformation on the mouth.

The formwork erection specification is:1. The sweeping rod is not more than 20 cm from the ground, and it is set vertically and horizontally.

2. The scissor brace is set every 4 vertical rods, the angle is between 45-65 degrees and should not be less than 6 meters, and the horizontal scissor brace is set every 2 steps.

3. The spacing of the vertical rods: generally meters, the high span is meters, and the spacing of horizontal rods does not exceed meters per step.

Template type. 1. Disassemble and assemble mold stove or plate.

One is a general disassembly template, that is, a ready-made template; The other is the shaping template (wood shaping template and steel shaping formwork), which is a variety of different specifications of formwork plates produced by the factory, which are installed by fixtures and support systems.

2. Lifting template.

Often referred to as a sliding formwork, this type of formwork can be moved vertically upwards at intervals through the system.

3. Fixed template.

This kind of formwork has soil fetal film, brick fetal film and the use of concrete components as formwork brothers.

4. Miscellaneous. There are flat formwork (the formwork can move along the horizontal direction at intervals), concrete formwork (after the concrete is poured, the formwork becomes the surface layer of concrete) and the flip demoulding formwork.

The acceptance specifications and standards of formwork support are as follows:

1. Technical requirements for poles.

It is erected strictly according to the design dimensions, and the maximum step distance between the horizontal bars is 1500 mm. After each step of the formwork is completed, the step distance of the horizontal rod, the longitudinal and transverse distance of the vertical rod, the vertical deviation of the vertical rod and the horizontal deviation of the horizontal rod should be corrected in time. The vertical deviation of the control pole should not be greater than h 500 and should not be greater than 50mm.

2. Technical requirements for crossbars.

First, pop up the axis and beam position line on the floor slab and copy out the horizontal control elevation line on the erected support frame, and when the free end exceeds 500, a small crossbar needs to be added.

3. Technical requirements for diagonal bracing erection.

The diagonal brace must be erected synchronously with the frame body, and the relevant requirements of the "Safety Technical Code for Fastener Steel Pipe Scaffolding in Building Construction" (JGJ130-2011) must be met when the buckle Yandan piece steel pipe structure fittings are used as reinforcements and diagonal braces.

Safety management during formwork construction

1. The construction unit shall prepare a special plan before the construction of the sub-project with greater risk. Concrete formwork support engineering: erection height of 5m and above; erection span of 10m and above; The total construction load is 10kn m2 or more; Concentrated line load 15kn m2 and above; The height is greater than the width of the supporting horizontal projection and is relatively independent and has no contact components.

2. For sub-projects with greater risk than a certain scale, the construction unit shall organize experts to demonstrate the special plan. Concrete formwork support project: erection height of 8m and above; The erection span is 18m and above, and the total construction load is 15kn m2 and above; Concentrated line load 20kn m2 and above.

The longitudinal vertical scissor brace is arranged along the longitudinal full height and full length of the bracket on the vertical side close to the vertical rod; The transverse vertical scissor brace is set along the full height and length of the bracket along the vertical straight surface close to the vertical rod; Horizontal scissor braceIt is set in full plane along the horizontal plane close to the horizontal rod.

The extension length of the adjustable jacking should not exceed 200mm. Unless otherwise specified in the design drawings, all vertical support columns shall be guaranteed to be vertical. The gap between the outer diameter of the screw rod and the inner diameter of the steel pipe shall not be greater than 3mm, and the upper and lower divisions should be ensured during installation, and when the support of the bracket is the ground, the site should be flat, the drainage should be smooth, and the ground should not subside.

Precautions for the erection of formwork support and blindness

In the construction of concrete floor slabs, the load center transfer is the center, and the center of the upright rod is stressed and the center is transmitted to minimize eccentricity.

The focus point of the pole should be solid and flat, and the steel base should be preferred, such as the scaffold board.

or wood, the size of the base should be large and not small, long and not short, and should be prevented from soaking; The pole should be supported straight and firmly.

In order to have the necessary structural enhancement measures, it is advisable to add structural columns in the structural design according to the situation of the empty body with sections such as tall space and load.

The practice of tectonic zones and tectonic layers to ensure structural solidity.