CN102168484B - External hanging scaffold and application method thereof - Google Patents

Abstract

The invention discloses an external scaffolding and an application method thereof. The external scaffolding is a scaffold that is erected at one time and attached to a building, and uses a tower crane installed on the construction site as a lifting power equipment, including a vertical truss, an attachment device, a frame body, the frame body is connected with a vertical truss, the vertical truss is connected with an attachment device, and the attachment device is connected with a building, and the attachment device includes an anti-roll bar on the upper part of the vertical truss and a The load-bearing outriggers are equipped with automatic limit devices. The application method of the external scaffolding includes its installation, fixing, lifting and dismantling. The utility model has the advantages of simple structure, convenient use and excellent economic and social benefits.

Description

An external scaffolding and its application method

technical field

The invention relates to a scaffold for building construction, in particular to a scaffold used for protection during the construction phase of a building main body.

Background technique

In the past, most of the external wall materials of high-rise buildings in China used ceramic tiles. Recently, due to the frequent safety accidents of tiles falling off and causing injuries and damages, they were gradually replaced by paints. The best machine for paint application is a hanging basket. Therefore, in the construction stage of the exterior wall, the traditional scaffolding is also replaced by the hanging basket accordingly. But in the main construction stage, there was no dedicated scaffolding before. In the prior art, there is a kind of external scaffolding, which is set up in pieces along the building, once set up and formed, and attached to the building. When the building is raised by one floor, a tower crane is used as the lifting power to lift it up once. In order to meet the load-bearing requirements, a vertical truss is provided as the skeleton of the scaffold. Since it takes a period of time for the building to reach the strength that can bear a large load after the concrete is poured, it is advisable that the load-bearing fulcrum of this scaffold should be located at the lower part of the vertical truss. In order to prevent the scaffold from overturning, an anti-roll bar should also be provided on the upper part of the vertical truss. The load-bearing fulcrum and the anti-roll bar are usually connected with the building by using the wall-through screw rod or connected with the cantilever member arranged on the building floor or the door opening or the window opening. This kind of scaffolding has simple structure, low cost and good economic benefits. However, since the building structure usually has a closed shear wall structure, if this structure uses wall-through screws, personnel must stand on the scaffold to remove the wall-through screws when the scaffold is lifted. If the scaffold falls at this time, a safety accident will occur, so There are major safety hazards; and cantilever components generally have a large cross-section because they need to meet the strength requirements. If openings are opened in the shear wall, the building structure will be weakened, and there are also disadvantages. In addition, there are usually protruding or concave structural changes on the facade of the building. When the scaffold is lifted, its anti-roll bar or the force-bearing member as the load-bearing fulcrum will collide or interfere with it accidentally, resulting in damage. Therefore, the operation of this scaffold is not very convenient, and its adaptability needs to be improved.

Contents of the invention

The technical problem to be solved by the present invention is to provide a universality, no matter it is a side beam or a balcony or a shear wall structure and a structure with a protruding or recessed building facade, it can be easily installed, and the operation is simple, avoiding the occurrence of Add-on scaffolding for state interference or collisions.

The technical solution adopted by the present invention to solve the technical problem is: a kind of external scaffolding, which is a scaffolding that is erected at one time and attached to the building, and uses the tower crane installed on the construction site as the lifting power equipment, including vertical trusses, Attachment device, frame body, the frame body is connected with the vertical truss, the vertical truss is connected with the attachment device, the attachment device is connected with the building, and the attachment device includes an anti-roll bar on the upper part of the vertical truss and a The load-bearing leg towards the middle and lower part of the truss is characterized in that: the anti-roll bar is hinged on the vertical truss; the load-bearing leg is provided with an automatic limit device, and the automatic limit device makes the load-bearing support The legs are rotationally connected with the vertical truss in the lifted state, while the load-bearing legs are fixedly connected with the vertical truss in the attached state.

The advantage of adopting the above structure is: when the present invention is attached to a building, all self-weight and construction load are borne by the load-bearing legs at this moment, and the load-bearing legs are fixedly connected with the vertical truss so that the whole shelf is in a stable state; when the present invention lifts At this time, since the anti-roll bar is hinged on the vertical bar, and at this time the load-bearing leg is connected to the vertical truss in rotation, so the anti-roll bar or load-bearing leg can be turned to make it retract along the vertical truss, smoothly Realize vertical lifting without driving the trolley of the tower crane, and drive the invention to move away from the building to avoid the protruding structure on the upper floor, which saves time and greatly reduces the occurrence of safety accidents caused by being tied to the building probability. The frame body can be a commonly used steel pipe fastener scaffold, or a bowl-shaped scaffold or a scaffold composed of other shaped rods.

Further, an automatic limit device for load-bearing legs of the present invention is disclosed, which is characterized in that: the corresponding parts of the load-bearing legs and the vertical truss are respectively provided with upper/lower connecting ear plates, and the upper/lower connecting lugs The ear plate has the same center of rotation on the horizontal plane, and the automatic limiter includes the end face of the beam of the load-bearing leg and the stop block arranged on the ear plate of the vertical truss. When the vertical truss is in the state of being attached to the building When the truss is lifted by the tower crane, the stop block will bear against the end face of the beam of the load-bearing leg to prevent it from rotating; when the vertical truss is in the lifting state of the tower crane, the load-bearing leg will slide down along the axis of the rotation center under the action of its own weight and break away from the stop block .

This structure does not require special machining parts, has low cost, is easy to manufacture and process, and is the most simple and practical.

Further, in order to enhance the versatility of the present invention, the load-bearing legs are provided with movable connection plates supporting all loads and drag hooks connected with ground anchor rings arranged on buildings. In this way, when encountering a shear wall structure, the load-bearing outrigger can remove the movable connecting plate, insert the drag hook into the ground anchor ring anchored on the shear wall, and form a hinged connection to the building to meet the needs of the structure; When encountering edge beams or balcony beams or when it is inconvenient to use the drag hooks on the load-bearing legs to connect with the ground anchor rings on the building, the movable connecting plate can be used to support the building structure to meet the force requirements. Such a structure greatly enhances the versatility of various building structures, and has a simple structure, low cost, easy manufacturing and processing, and very convenient operation.

Further, in order to increase the safety of the present invention, the upper part of the vertical truss is also provided with an anti-fall device, and the anti-fall device includes a hoop connected with the vertical truss and a ground anchor ring arranged on the building. Attached pull hook. In this way, when the load-bearing leg fails due to an accident, the self-weight and construction load originally borne by the load-bearing leg can be borne by the anti-fall device instead; The effect of overturning has increased a heavy insurance for the present invention.

Another important purpose of the present invention is to provide the application method of above-mentioned external scaffolding.

To achieve this purpose, the present invention provides a technical solution: the application method of external scaffolding as claimed in claim 1, characterized in that: comprising the following steps:

1) Compile the construction plan, set up in sections along the periphery of the building, and divide it into multiple external scaffold units according to the lifting capacity of the construction tower crane on site, each unit includes two vertical trusses; draw the layout of the external scaffolding, adjacent Keep a safe lifting distance between the frame bodies, usually the distance is between 200mm and 400mm; determine the position and number of vertical trusses according to the floor plan;

2) Install the vertical truss, attachment device and frame body according to the position of the floor plan described in step 1), the frame body and the vertical truss are connected, and the adjacent external scaffolding units are flexibly connected through rods;

3) Embed ground anchor rings on the construction floor;

4) Connect the vertical truss or the frame to the building through the connecting wall rods;

5) As the building rises, it is connected with scaffolding rods to increase the height of the frame until it reaches the design height;

6) Connect the upper part of the two vertical trusses with the steel wire rope of the tower crane hook. After the steel wire rope is stressed, remove the movable connection rod between the wall rod and the adjacent external scaffold unit, start the tower crane hoisting mechanism, and remove the external protective frame. raise a floor;

7) After being lifted in place, connect the load-bearing outriggers and anti-roll bars in the attachment device to the building respectively;

8) Remove the wire rope of the external scaffolding that has been lifted in place, connect the adjacent external scaffolding units that have been lifted in place through rods, and install the wall connecting rods connected to the building to enhance the stability of the external scaffolding unit.

9) Bury ground anchor rings on the construction floor;

10) Repeat step 6) to step 9 until the construction of the main body of the building is completed, and the external scaffolding unit is lifted to the ground with a tower crane for demolition.

The application method of this kind of external scaffolding is very simple to operate, and is suitable for buildings of various structures. Workers construct in the building, the labor intensity is small, and the lifting efficiency is high. The installation and removal are carried out on the ground or the floor surface, which is safe and guaranteed.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the enlarged schematic diagram of I of Fig. 1;

Fig. 3 is the enlarged schematic diagram of II of Fig. 1;

Fig. 4 is a partial structural schematic diagram of the load-bearing leg of the present invention;

Figure 5 is an enlarged schematic view of A in Figure 4;

Fig. 6 is a partial enlarged schematic view of the load-bearing leg of the present invention located on a building edge beam or a balcony beam;

Fig. 7 is a partial enlarged schematic view of the anti-rolling bar and the anti-falling device of the present invention located at the building edge beam or balcony beam;

Fig. 8 is a partially enlarged schematic diagram of the vertical truss of the present invention located at the double cornice of the building;

Fig. 9 is a partial enlarged schematic view of the vertical truss of the present invention located at the shear wall of the building;

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Detailed ways

As shown in Figure 1, the frame composed of the large horizontal bar 1 and the vertical bar 2 is connected to the vertical truss 8 through fasteners, and its outer facade is laid with a dense mesh safety net 3, and the upper part of the frame body is passed through the fasteners by diagonal rods 4. The vertical trusses 8 are connected, and the ground anchor ring 5 is arranged on the facade of the building as a member connected with the building of the present invention. The horizontal safety net 6 is laid between the bottom of the frame body and the building, preventing objects from falling from a height to the bottom of the frame body. The present invention is set up in slices along the periphery of the building, and each slice is provided with two pieces of vertical trusses, and the vertical trusses are connected with cross bars 7 to form a stable scaffold structure. An ear plate is provided on the anti-roll bar member 9, and is connected with the ear plate on the vertical truss 8 through a pin shaft to form a horizontally rotatable hinge. Below the vertical truss 8, the inner row of uprights 15 are also connected by fasteners, and the inner row of uprights 15 and the uprights 2 are connected by fasteners to form a double row frame through the inner row of large crossbars 17 and the outer row of large crossbars 18 body, on which closed materials such as bamboo springboards 19 are laid to prevent objects from falling down from the scaffolding. In order to increase the stability, the oblique rods 16 are respectively connected to the inner and outer rack bodies through fasteners. The bottom connecting wall rod 20 is tied on the ground anchor ring provided on the building.

In FIG. 2 , one end of the turnbuckle 10 is hooked on the ground anchor ring 21 , and one end of the ground anchor ring 21 is anchored on the building. The other end of the turnbuckle 10 is hooked on the ring of the pull ring 11, and the other end of the pull ring 11 is connected to the vertical rod of the vertical truss 8 through a hoop.

In FIG. 3 , the hook 23 of the supporting leg 13 hooks into the ground anchor ring 21 . In FIG. 4 , lug plates are respectively provided on the load-bearing legs 13 and the vertical trusses 8 , which are respectively connected by pin shafts 24 and 25 . The axial extension lines of the pin shaft 24 and the pin shaft 25 coincide so that the bearing leg 13 can rotate around the vertical truss 8 . FIG. 5 shows a schematic structural diagram of the automatic limiter for the load-bearing leg 13 . In Fig. 5, a protruding partial stop block 26 is provided on the lug plate of the vertical truss 8, and the load-bearing leg 13 can slide up and down along the pin shaft 25. In the lifting state shown in Fig. 5 , the load-bearing leg 13 The end face 27 of the beam slides down under the action of its own weight to disengage the stop block 26. At this time, the load-bearing leg 13 can rotate around the vertical truss to avoid the protrusions on the upper floor, such as the upper cornice 34 shown in FIG. 8 . Thereby vertical lifting is achieved. When the present invention is in the attached state, the vertical truss 8 slides downward under the action of its own weight so that the stop block 26 is inserted into the side of the beam end face 27, leaving only a gap of about 0.2mm to 0.5mm between the two, so that the load bearing The angle of rotation of the support leg 13 is limited, and the existence of this gap allows the load-bearing leg 13 to slightly swing an angle relative to the vertical truss 8, so that the load-bearing leg 13 can adapt to the ground anchor ring shown in Figure 3 21 Deviations in embedding. What Fig. 6 provides is the fixing situation of load-bearing supporting leg 13 on building edge beam or balcony beam. In Fig. 6, the movable connecting plate 28 is connected on the load-bearing leg 13 by bolts 29, and the movable connecting plate 28 is supported on the building edge beam or the balcony beam. In Fig. 7, the anti-falling device 31 is connected to the vertical truss 8 through a hoop, and the other end is connected to the turnbuckle 30, and the turnbuckle 30 is hooked into the hole of the small head of the wedge-shaped steel wedge 32, and the steel wedge 32 penetrates into the anchor In the ground anchor ring 33 on the floor. The effect of turnbuckle 30 is to be convenient to adjust length, can install or remove conveniently. In Fig. 8 and Fig. 9, the situation where the vertical truss is located on the double cornice and the shear wall are respectively shown. In both cases, the articulation plate of the load-bearing leg 13 is removed, and its drag hook is inserted into the ground anchor ring 35 anchored on the building to fix it.

The following is an example to illustrate the application method of an external scaffolding of the present invention: it includes the following steps: 1) Compile the construction plan, set up in pieces along the periphery of the building, and divide it into multiple external scaffolding units according to the lifting capacity of the construction tower crane on site, each unit Including two vertical trusses; draw the floor plan of the external scaffolding, and keep a safe lifting distance between adjacent frames, usually the distance is between 200mm and 400mm; determine the position and location of the vertical truss according to the floor plan quantity;

2) Install the vertical truss, attachment device and frame body according to the position of the floor plan described in step 1), the frame body and the vertical truss are connected, and the adjacent external scaffolding units are flexibly connected through rods;

3) Embed ground anchor rings on the construction floor;

4) Connect the vertical truss or the frame to the building through the connecting wall rods;

5) As the building rises, it is connected with scaffolding rods to increase the height of the frame until it reaches the design height;

6) Connect the upper part of the two vertical trusses with the steel wire rope of the tower crane hook. After the steel wire rope is stressed, remove the movable connection rod between the wall rod and the adjacent external scaffold unit, start the tower crane hoisting mechanism, and remove the external protective frame. raise a floor;

7) After being lifted in place, connect the load-bearing outriggers and anti-roll bars in the attachment device to the building respectively;

8) Remove the wire rope of the external scaffolding that has been lifted in place, connect the adjacent external scaffolding units that have been lifted in place through rods, and install the wall connecting rods connected to the building to enhance the stability of the external scaffolding unit.

9) Bury ground anchor rings on the construction floor;

10) Repeat step 6) to step 9 until the construction of the main body of the building is completed, and the external scaffolding unit is lifted to the ground with a tower crane for demolition.

In particular, when some external scaffolding is directly erected on the floor or the ground and needs to be erected in the air, the installation platform of the external scaffolding can be erected as follows:

A After the floor steel bars are tied, the ground anchor rings are buried before concrete pouring. Note that the ground anchor rings should be worn under the bottom bars of the floor slabs, and tied with the floor steel bars with tie wires. The buried position of the ground anchor ring is about 1.5m away from the edge beam, and the distance is 1.8m - 2.0m;

B selects a steel pipe with a length of 2m --- 6m as the sweeping rod. The longitudinal sweep rods are inserted into the ground anchor rings and secured with wooden wedges. The longitudinal sweeping rods are connected end to end with butt fasteners, and the corners are connected with right-angle fasteners to form a whole. The pick pole penetrates under the longitudinal sweeping pole, and is connected with the vertical sweeping pole with right-angle fasteners. The distance beyond the building is not less than 1.8m, and the front end of the pick pole is leveled with wooden squares.

C select steel pipes of corresponding specifications as the large horizontal bar at the bottom of the external hanger, use two right-angle fasteners at both ends to connect with the pole, and fix the large cross bar on the pole.

D connects the diagonally braced steel pipe and the large cross bar with a fastener, and the other end of the diagonally braced steel pipe is supported on the floor surface of the next floor.

The above embodiments only illustrate the specific application of the present invention, and cannot be interpreted as limiting the protection scope of the present invention. As long as the technical scheme of the present invention is adopted, or only conventional changes or deformations that can be made by those of ordinary skill in the art, all Fall into the protection scope of the present invention.

Claims (4)

1. a kind of external scaffolding, it is once set up molding and is attached on the building, is the scaffolding that is installed in the tower crane of building construction site as lifting power equipment, comprises vertical truss, attachment device, frame body, described frame body and The vertical truss is connected, the vertical truss is connected with an attachment device, and the attachment device is connected with the building, and the attachment device includes an anti-roll bar located at the upper part of the vertical truss and a load-bearing leg located at the middle and lower part of the vertical truss. In that: the anti-roll bar is hinged on the vertical truss; the load-bearing leg is provided with an automatic limit device, and the automatic limit device makes the load-bearing leg rotatably connected with the vertical truss in the lifted state , while the load-bearing leg is fixedly connected to the vertical truss in the attached state, and the corresponding parts on the load-bearing leg and the vertical truss are respectively provided with upper/lower connecting lugs, and the upper/lower connecting lugs have a horizontal plane With the same center of rotation, the automatic limiter includes the end face of the beam of the load-bearing leg and the stop block arranged on the ear plate of the vertical truss. When the vertical truss is in the state of being attached to the building, the stop The block bears against the beam end face of the load-bearing leg to prevent it from rotating; when the vertical truss is in the lifting state of the tower crane, the load-bearing leg slides down the axis of the rotation center under its own weight and breaks away from the stop block. 2. The external scaffolding as claimed in claim 1, characterized in that: the load-bearing legs are provided with movable connecting plates supporting all loads and drag hooks connected with ground anchor rings arranged on buildings; The rod is provided with a groove/hook connected with the ground anchor ring provided on the building. 3. The external scaffolding as claimed in claim 1, characterized in that: said vertical truss is also provided with anti-falling device, said anti-falling device comprises a hoop connected with the vertical truss and connected to the building The pull hook connected to the ground anchor ring on the object. 4. The application method of external scaffolding as claimed in claim 1, characterized in that: comprising the following steps: 1) Compile the construction plan, set up in sections along the periphery of the building, and divide it into multiple external scaffold units according to the lifting capacity of the construction tower crane on site, each unit includes two vertical trusses; draw the layout of the external scaffolding, adjacent Keep a safe lifting distance between the frame bodies, usually the distance is between 200mm and 400mm; determine the position and number of vertical trusses according to the floor plan; 2) Install the vertical truss, attachment device and frame body according to the position of the floor plan described in step 1), the frame body and the vertical truss are connected, and the adjacent external scaffolding units are flexibly connected through rods; 3) Embed ground anchor rings on the construction floor; 4) Connect the vertical truss or the frame to the building through the connecting wall rods; 5) As the building rises, it is connected with scaffolding rods to increase the height of the frame until it reaches the design height; 6) Connect the upper part of the two vertical trusses with the steel wire rope of the tower crane hook. After the steel wire rope is stressed, remove the movable connection rod between the wall rod and the adjacent external scaffold unit, start the tower crane hoisting mechanism, and remove the external protective frame. raise a floor; 7) After being lifted in place, connect the load-bearing outriggers and anti-roll bars in the attachment device to the building respectively; 8) Remove the wire rope of the external scaffolding that has been lifted in place, and connect the adjacent external scaffolding units that have been lifted in place through rods, and install the wall connecting rods connected to the building to enhance the stability of the external scaffolding unit; 9) Bury ground anchor rings on the construction floor; 10) Repeat step 6) to step 9 until the construction of the main body of the building is completed, and the external scaffolding unit is lifted to the ground with a tower crane for demolition.

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