Demolition of formwork for dormitory building project?

The following is the related content of template removal of dormitory building project brought by Zhong Da Consulting for your reference.

1, demoulding conditions

Strength conditions of reinforced concrete structures (determined by making test blocks with the same conditions)

Structural type The structural span is expressed as a percentage (%) of the standard value of design concrete strength.

Plate ≤250

& gt2,≤875

& gt8 100

Beams and arches ≤875

& gt8 100

Hanging wall component ≤275

& gt2 100

2. Matters needing attention in form removal

(1) Key points of formwork removal

1) Side formwork removal: Only when the strength of concrete is difficult to ensure that its surface and corners are not damaged by formwork removal can it be removed.

2) The removal of bottom formwork and winter construction formwork must comply with the relevant provisions of Code for Construction and Acceptance of Concrete Structure Engineering (GB50204-92). ZuoYeDui must apply for the approval of the engineering department before demolition.

3) Demolition follows the principles of first supporting and then dismantling, first dismantling and then dismantling, and first dismantling the non-bearing formwork and then dismantling the bearing part formwork; From top to bottom, first remove the horizontal support, and then remove the vertical support.

4) The formwork engineering operation organization shall follow the system of formwork support and formwork removal, which shall be implemented by the operation team. Its advantage is that when working in the same team, the formwork support will consider the convenience and safety of formwork removal. When ripping, people are familiar with the situation, and it is easy to find the key points of ripping, which is beneficial to the progress, safety and protection of templates and accessories.

3, beam slab formwork removal

(1) flow chart

Dismantle the horizontal tie rod and bracing of the bracket → dismantle the side formwork → lower the floor column → lower the formwork → dismantle the floor formwork in sections → dismantle the wooden keel and pillar → dismantle the beam bottom formwork and supporting system.

(2) Key points of demolition process:

[1 Remove some horizontal tie rods and scissors of the bracket for operation. Then dismantle the horizontal steel pipe and inclined support on the beam side formwork, and gently pry the beam side formwork away from the concrete surface.

[2] After lowering the top thread of the pillar, pry the keel under the template lightly to separate the keel from the template, or tap with a wooden hammer to remove the first piece and then remove it piece by piece. Never slam and pry with a steel bar or hammer. When each bamboo veneer is dismantled, it should be supported manually on the ground, or lowered to a certain height with jacking wires to support the dismantled formwork. It is forbidden for the template to land freely.

[3] The method of dismantling beam bottom formwork is roughly the same as that of floor formwork, but when dismantling beam bottom formwork with large span, the top wire of the column should be lowered from the middle of the span first, and then lowered to both ends one by one. When dismantling the formwork pillar at the bottom of the beam, it should also be operated from both ends of the span.

4. Dismantle the horizontal tie rod and bracing of the bracket, and then dismantle the connection angle template and beam side template between the beam and the floor, so that the adjacent two templates are disconnected.

5. After lowering the support screw of the top wing of the column, gently pry open the bamboo veneer with a steel drill or a wooden hammer, remove the first piece, and then remove it piece by piece. Every bamboo veneer is removed and manually transferred and placed on the ground.

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