Scaffolding construction plan

1. Scaffolding project erection and dismantling plan

(1) Construction requirements

1. In the construction phase of the structure, a single-row outer rack of fastener steel pipes is used.

2. In the decoration stage, a single-row outer rack of fastener steel pipes is used.

3. Before construction, organize safety personnel and scaffolders to carefully review the drawings, be familiar with the drawings, master the construction requirements of the project for scaffolding, and formulate detailed targeted and operable technical explanations according to the actual situation of the project structure. The key units shall make an on-site confession and determine the construction method on the spot. At the same time, the construction team put forward project quality requirements and project schedule requirements.

4. Provide a special material storage space for the construction team that puts up a rack.

5. Due to the small size of the construction site, carefully calculate the number of materials (such as rack pipes, dense mesh nets, safety nets, color striped cloth, etc.) required for each section of the shelf, and enter the site as needed. Try to ensure that there are fewer shelf materials on site. Those that meet the requirements will be temporarily stacked in a dedicated warehouse and padded with wooden squares.

6. After the rack tubes and other materials enter the site, the quality will be carefully checked on site, and the materials that do not meet the requirements will be returned immediately.

7. The inner scaffold adopts a bowl-buckle scaffold which is flexible in disassembly and assembly.

8. Before scaffolding is constructed, a detailed construction plan shall be prepared and submitted to relevant departments for approval before construction can be carried out.

(2) The design and construction method of the outer shelf

1. Construction method of single-row outer scaffolding of steel pipe for structural and exterior decoration fasteners

1) Basic structure

The scaffolding of this project is a single-row steel pipe scaffold with fasteners for structural construction and exterior decoration construction, and it is in accordance with the JGJ130-2001 construction and construction fastener steel scaffolding safety technical code. The designed step distance is 1.5m. In order to cooperate with the construction of the main structure wall group, large crossbars can be added according to the actual height of the working layer; during the construction stage of the structure, the gable and other parts of the load should be reinforced as follows: Layer by notoginseng lime soil Backfill and ram, place a full-length 50-thick scaffold board on the pole as a backing board.

2) Installation method

The scaffolding must be erected in line with the construction schedule at one time and the erection height shall not exceed two steps above the adjacent connecting wall. After each step of scaffolding, the step distance, longitudinal distance, verticality of the cross bar and the vertical pole should be corrected according to the regulations.

(1) The bottom of the scaffold must be pulled through, and the position of the pole must be found according to the requirements. The foundation shall be tamped and stabilized with 3:7 lime soil. The length of the upper bunk shall not be less than two spans and the thickness shall not be less than 5cm thick wooden boards. Drainage ditch shall be set on the outside of the scaffold. , Maintain good drainage performance. The scaffolding must be equipped with vertical and horizontal sweeping rods. The vertical sweeping rod should be fixed on the vertical pole with right-angle fasteners at a distance of no more than 200mm from the base epithelium. The horizontal sweeping rod should be fixed on the vertical pole immediately below the vertical sweeping rod with right-angle fasteners. When the foundation of the vertical pole is not at the same height, the vertical sweeping pole at the high place must be extended to the low place by two spans and fixed with the vertical pole, and the height difference is not more than 1m. The shelf plane is arranged along the outline of the building.

(2) It is strictly forbidden to mix steel pipes with an outer diameter of 48mm and 51mm for vertical poles. The distance between the inner rod and the outer wall is 50cm, and the outer rod is 1.7~2.0m from the outer wall. The joints of the vertical poles should be staggered and arranged in different steps. When starting to erect the poles, a throwing support should be set every 6 spans until the connecting wall is installed and stabilized before it can be removed according to the situation. The top of the pole is 1m above the parapet wall and 1.5m above the cornice epithelium.

(3) The frame and the structure are connected by rigid connection, the horizontal distance is not more than 6m, and the vertical distance is not more than 4m. Set up from the first vertical horizontal rod on the bottom layer, and each layer is equipped with a pull connection. Connecting wall rods or tie bars should be set horizontally, and diagonal connections are strictly prohibited. The scissor support is 10 steps per dozen, 5 steps per rotation, and there must be poles at the intersection. The number of scissor supports in each group is singular, and no even numbers are allowed.

(4) The large crossbar, that is, the longitudinal horizontal rod, is set on the inner side of the vertical rod, and is fastened with the vertical rod with cross fasteners, and shall not be omitted. The joint positions of the upper and lower horizontal rods should be staggered and arranged in different vertical distances, which are not synchronized or The distance between two adjacent joints of different spans in the horizontal direction is not less than 500mm, and the distance from the center of each joint to the nearest main node is not more than 1/3 of the longitudinal distance. This project uses wooden scaffold boards, and vertical horizontal rods are used as supports for horizontal horizontal rods. The horizontal deviation of the same row of large crossbars shall not be more than one thousandth of the total length after the crossbars are connected.

(5) The small cross bar, that is, the horizontal horizontal bar, should be arranged close to the vertical bar, and it should be fastened with right-angle fasteners and it is strictly forbidden to remove it. The center distance of the two right-angle fasteners at the main node should not be greater than 150mm, the outer elongation of the end against the wall should not be greater than 500 mm, and the distance to the decorative surface of the wall should not be greater than 100 mm.

(6) Scaffolding board: it must be laid flat and tightly, and it must be 120~150 mm away from the wall without flying board. The scaffold probe should be fixed on the support rod with 3.2 mm galvanized lead wire. The scaffold boards at the corners and at the entrance of the ramp platform should be reliably connected with the horizontal horizontal rods to prevent sliding. Two guardrails and toe boards must be installed on the work floor where the scaffolding boards are laid. The upper railing height is 1.2 m, the middle railing is set in the middle, and the toe board height is 180 mm.

(7) Safety net: a dense mesh safety net must be used to close the inside of the outer shelf. The safety nets must be firmly connected up and down and fixed to the frame. The vertical net is three-dimensionally closed from the bottom sweeping rod to the top of the shelf. A horizontal safety net is placed between the double rows of shelves and the lower layer of the scaffold on the work floor.

(8) Protective shed: Fix entrances and exits according to the construction personnel's access to the building, non-entrances are closed, the roof of the protective shed is covered with 50 mm thick scaffolding, the total length of the passage is not less than 6 m, landing on both sides, and closed with dense mesh nets.

2. Demolition requirements

1) The preparatory work before demolition should meet the following requirements:

Comprehensively check whether the fastener connections, wall fittings, and support systems of the scaffold meet the structural requirements, and improve the program removal sequence and measures based on the inspection results. They can only be implemented after the approval of the company's competent department. The person in charge of the project department should conduct the removal. Safety technology Confession, debris on the scaffold and ground obstacles should be removed.

2) When removing the scaffold, the following requirements should be met:

The dismantling operation must be carried out from top to bottom, and simultaneous operation up and down is strictly prohibited; the connecting wall parts must be dismantled layer by layer. It is strictly forbidden to dismantle the whole layer or several layers of the connecting wall parts before dismantling the scaffolding. If the height difference is greater than 2 steps, additional wall elements should be added for reinforcement; when the scaffolding is removed to the height of the last long pole (about 6.5 m), temporary throwing and reinforcement should be erected at the appropriate position before removing the wall elements.

3. The following requirements should be met when unloading:

It is strictly forbidden to throw all components and parts to the ground. The components and parts transported to the ground should be inspected, repaired and maintained in time, and placed neatly at any time according to the variety and specifications.