CN105926917B - Steel structure cornices exterior trim surface construction suspension platform and its building method and method for dismounting - Google Patents

Abstract

The invention discloses a suspension platform for the construction of the outer decoration surface of a steel structure overhanging eaves and a construction method and a dismantling method thereof. The ends are fixed with suspenders and cornices. The construction method of the suspended platform includes the production of the unit section, the production and connection of the upper cantilever, the suspension of the construction panel and the setting of the protective surface. The dismantling method of the suspended platform follows the principle of building first and dismantling later, so that the construction panel is dismantled at the end of the dismantling, which ensures the safety of the construction personnel during the dismantling process, and at the same time, the dismantling process is safe and fast. The suspension platform of the present invention can be directly suspended under the overhanging eaves, thereby facilitating the construction under the overhanging eaves. More bolts are used at the joints, which facilitates the recycling and use of materials and improves the construction speed of the suspension platform. The construction method of the present invention enables the suspension platform to be constructed quickly, and the constructed suspension platform is safe.

Description

Suspension platform for the construction of steel structure overhanging eaves exterior surface and its construction method and dismantling method

technical field

The invention belongs to the field of construction of steel structure overhanging eaves exterior decoration, and in particular relates to a suspension platform for construction of steel structure overhanging eaves exterior decoration and its construction method and dismantling method.

Background technique

Overhanging eaves outside a building is a common building structure, and the common building overhanging eaves construction methods are: scaffolding and hanging baskets.

For scaffolding: When the length of the external overhanging eaves of the building exceeds 1.5 meters and the height of the overhanging eaves exceeds 50 meters, because the distance between the overhanging walls is too large and the height of the overhanging eaves is high, it is safe to use scaffolding for the construction of the exterior overhanging eaves. It is relatively low and cannot meet the requirements of safe operation.

For the hanging basket: when the hanging basket is in use, the load and pulling force of the steel structure of the overhanging eaves are relatively large, and the damage to the steel structure of the overhanging eaves is also relatively large, and the safety is low.

Therefore, for the overhanging eaves with a building height of more than 50 meters, it is an urgent problem to be solved what kind of operating platform to use to meet the safety during the construction process and ensure the safety of high-altitude operations.

Contents of the invention

The present invention aims to provide a suspension platform for the construction of steel structure overhanging eaves with safe use effect and its construction method and dismantling method.

In order to solve the above technical problems, the present invention provides the following technical solutions: a suspension platform for the construction of the exterior surface of the steel structure overhanging eaves, including a construction panel, a boom and a protective surface connecting the construction panel and the overhanging eaves;

The construction panel is fixed under the overhanging eaves through suspenders;

The construction panel includes at least one unit section, each unit section is connected and distributed along the width direction of the overhanging eaves; the unit section is in the shape of a line or L-shaped, and the length of the line-shaped unit section is 2900~3100mm; the length of the L-shaped unit section is less than 1500mm;

The unit section is composed of at least one truss. The length of the truss is 400~600mm longer than the length of the overhanging eaves. The trusses are arranged along the length of the overhanging eaves; The trusses share one truss;

The protective surface is located at the edge of the construction panel and is arranged around the circumference of the construction panel. The protective surface includes a steel wire mesh and a dense mesh vertical mesh located inside the steel mesh; the steel wire mesh includes protective steel wire ropes.

There is a skirting board on the end face of the truss, and the height of the skirting board is 150~200mm.

The cross bars are 60×40×4 hot-dip galvanized square tubes; adjacent cross bars along the width direction of the overhanging eaves are arranged staggered, and the distance between adjacent cross bars along the length direction of the overhanging eaves is ≤1220mm.

Corresponding to each truss on the overhanging eaves, an upper cantilever is fixed, the upper cantilever is set along the length direction of the overhanging eaves, the length of the upper cantilever is ≤ 3500mm, and the length of the overhanging eaves cantilevered by the upper cantilever is 450~550mm.

The number of suspenders set on each truss is two, which are the outer suspenders located at the outer end of the truss and the inner suspenders located at the inner end of the truss;

The two ends of the outer boom and the inner boom are respectively welded with two connecting plates, the overlapping length of the connecting plate and the outer boom and the inner boom is ≥150mm, and the connecting plates at both ends of the outer boom are respectively connected with the upper cantilever and the lower chord of the truss Connected by bolts; the connecting plates at both ends of the inner suspender are respectively connected to the overhanging eaves and the lower chord of the truss by bolts;

The adjacent outer suspenders and the adjacent inner suspenders on the end face of the construction panel are connected by 3 horizontal bars, and the adjacent outer suspenders and inner suspenders on the side of the construction panel are also connected by 3 horizontal bars;

The distances between the three horizontal bars and the surface of the truss are 500~700mm, 1100~1300mm and 1700~1900mm respectively.

The middle part of each truss is fixedly connected with the upper cantilever by a steel wire rope.

There is one external fixing device on the outer end of the overhanging eaves; two internal fixing devices are installed on the overhanging eaves at a distance of 2900~3100mm from the outer end of the overhanging eaves, and the upper cantilever is connected to the overhanging eaves through the external fixing device and the internal fixing device;

The external fixing device and the internal fixing device are two channel steels fixedly connected with the overhanging eaves, and the upper cantilever is sandwiched between the two channel steels and fixed by bolts.

The lower part of the overhanging eaves is provided with an inner safety rope base and an outer safety rope base corresponding to each truss;

The vertical distance between the inner safety rope base and the outer end of the truss is 3900~4100mm; the vertical distance between the outer safety rope base and the outer end of the truss is 1400~1600mm;

Both the inner safety rope base and the outer safety rope base are threaded with safety ropes arranged along the width direction of the overhanging eaves.

The method for building the suspended platform for the construction of the above-mentioned steel structure overhanging eaves exterior surface comprises the following steps:

a. Making unit sections;

First, prepare at least one truss according to the length of the overhanging eaves. The length of the truss is 400~600mm longer than the length of the overhanging eaves. The lower chord of the truss is a 120×60×4 hot-dip galvanized square tube, and the upper chord and web are both selected. 60×40×4 hot-dip galvanized square tube, the upper chord, the lower chord and the web are welded;

Then, according to the width of the overhanging eaves, the prepared trusses are connected together. Two adjacent trusses share one truss, and the connected trusses form a unit section; The width of the font-shaped unit section is 2900~3100mm; the width of the L-shaped unit section is 1400~1600mm;

b. Make the upper cantilever and connect the upper cantilever with the overhanging eaves;

First, select a hot-dip galvanized square tube with a model size of 120×60×4 and a length of ≤3500mm to prepare an upper cantilever, and the number of the upper cantilever is equal to the number of trusses;

Then, set up an external fixing device corresponding to each truss on the outer end of the overhanging eaves with the upper cantilever, and set two internal fixing devices on the overhanging eaves corresponding to each truss at a distance of 2900~3100mm from the end of the overhanging eaves;

Among them, the external fixing device and the internal fixing device are two channel steels fixedly connected with the overhanging eaves. The upper cantilever is clamped between the two channel steels of the external fixing device and the internal fixing device, and the upper cantilever and the channel steel are fixed by bolts. Together, realize the connection between the upper cantilever and the overhanging eaves; ensure that there is an upper cantilever above each truss;

c. Construction panel suspension:

First of all, prepare the boom, intercept the 120×60×4 hot-dip galvanized square tube with a length of ≤3000mm, and use it as the boom. The boom is divided into an outer boom and an inner boom;

Then, at both ends of the suspender, weld two 300mm-long 10# channel steel connecting plates respectively. When welding, ensure that the length of the overlapping part of the connecting plate and the suspender is not less than 150mm;

Subsequently, the connecting plates at both ends of the outer boom are respectively connected with the outer ends of the upper cantilever and the truss by bolts; the connecting plates at both ends of the inner boom are respectively connected with the inner ends of the eaves and the truss by bolts; , to ensure that both the outer boom and the inner boom are in a vertical state. When the outer boom and the inner boom are connected to the truss, the lower chord of the truss must be connected;

d. Set the protective surface at the edge of the unit section:

Firstly, connect the middle part of each truss to the overhanging eaves with a steel wire rope, and the steel wire rope is in a tensioned state;

Then, the adjacent outer suspenders and adjacent inner suspenders on the end face of the construction panel are connected by three horizontal bars, and the inner suspenders and outer suspenders on the side of the construction panel are also connected by three horizontal bars. ;

The distances between the three horizontal bars and the surface of the truss are 500~700mm, 1100~1300mm and 1700~1900mm respectively; among them, the horizontal bars are made of 60×40×4 hot-dip galvanized steel square tubes;

Subsequently, a steel wire mesh is set at the edge of the construction panel; the steel wire mesh includes protective steel wire ropes, and the protective steel wire ropes located on the end face of the construction panel are diagonally tied on the outer suspenders of the unit sections, and a diagonal tie is made every two unit sections Knot; the protective wire rope located on the side of the construction panel is tied diagonally between the outer and inner suspenders;

Finally, a dense mesh vertical net is set between the horizontal bar and the steel wire mesh, and the dense mesh vertical mesh is fixed on the steel wire mesh;

e. Set wooden skirting boards on the end of the truss, and the height of the skirting boards is 150~200mm;

f. Set a safety rope base at the lower part of the overhanging eaves, and pass the safety rope through the safety rope base;

Firstly, an outer safety rope base and an inner safety rope base are correspondingly set above each truss;

The vertical distance between the inner safety rope base and the outer end of the truss is 3900~4100mm; the vertical distance between the outer safety rope base and the outer end of the truss is 1400~1600mm;

Then, the inner safety rope base and the outer safety rope base are respectively threaded with safety ropes arranged along the width direction of the overhanging eaves;

g. The springboard made of bamboo plywood is fully paved on the upper part of the truss, and 8# galvanized iron wire is used to fix the springboard and truss.

A method for removing the suspended platform for the construction of the exterior surface of the above-mentioned steel structure overhanging eaves, comprising the following steps:

(1) Remove the springboard on the truss; remove the 8# galvanized iron wire, and then remove the springboard from the truss;

(2) Remove the safety rope; remove the safety rope from the inner safety rope base and the outer safety rope base;

(3) Remove the skirting board;

(4) Remove the protective wire rope;

(5) Remove the horizontal bar; remove the bolts connecting the horizontal bar and the outer boom to realize the removal of the horizontal bar;

(6) Remove the wire rope between the construction panel and the overhanging eaves; remove the turnbuckle bolts to separate the wire rope from the truss;

(7) Remove the construction panel from the boom;

Remove the bolts between the truss and the boom. When separating the truss from the outer boom and the inner boom, first separate the truss from the outer boom, and then separate the truss from the inner boom;

(8) Remove the boom from the upper cantilever and overhanging eaves;

(9) Remove the upper cantilever; loosen the bolts between the two channel steels, and then remove the upper cantilever.

Through the above technical scheme, the beneficial effects of the present invention are:

1. The two ends of the construction panel are fixed by suspenders and overhanging eaves, which facilitates the safety of the construction panel. The construction panel can be processed in advance, and then hoisted to realize suspension, which is convenient and fast; the protective surface is set so that the circumference of the construction panel is surrounded , to ensure the safety of the personnel on the construction panel; the construction panel is made in unit sections, which is convenient for hoisting.

2. The set skirting board protects the personnel on the construction panel to prevent personnel from accidentally falling off the construction panel.

3. Adjacent crossbars along the width direction of the overhanging eaves are staggered; the distance between adjacent crossbars along the length direction of the overhanging eaves is ≤ 1220mm, thereby improving the strength of the entire construction panel.

4. Corresponding to each truss on the overhanging eaves, an upper cantilever arranged along the length direction of the overhanging eaves is fixed. The set upper cantilever shares the force of the overhanging eaves and reduces the damage to the overhanging eaves.

5. The outer suspender and inner suspender are set to ensure the balance during the suspension of the construction panel. The suspender is connected to the construction panel and the cornice through the connecting plate and bolts. It is easy to use, fast to build, and convenient to disassemble and reuse materials. .

6. The set wire rope shares the force of the boom and improves the safety of the suspended platform.

7. The overhanging eaves are connected to the upper cantilever through the external fixing device and the internal fixing device. The connection is fast and the damage to the overhanging eaves is small. The channel steel and bolts provided make the connection between the two relatively stable.

8. The set inner safety rope base and outer safety rope base facilitate the setting of the safety rope, and the set safety rope can be used directly when using the suspended platform to ensure the safety of the user.

9. The construction method of the suspension platform for the construction of the exterior surface of the steel structure overhanging eaves disclosed by the present invention has compact steps, which can greatly improve the construction speed, and at the same time, the suspension platform constructed by this method has high safety.

10. The method for dismantling the suspended platform for the construction of the outer surface of the steel structure overhanging eaves disclosed by the present invention can greatly improve the dismantling speed, and at the same time, the construction panel will not have a large movement during the dismantling process, and the dismantling process is relatively safe.

Description of drawings

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

Fig. 2 is a schematic diagram of the internal structure of Fig. 1;

Fig. 3 is a schematic diagram of the protective surface structure;

Figure 4 is a schematic diagram of the installation structure of the upper cantilever;

Fig. 5 is the suspension platform construction method of the present invention;

Fig. 6 shows the method for removing the suspended platform of the present invention.

detailed description

The suspended platform for the construction of the exterior surface of the overhanging eaves of the steel structure includes a construction panel located under the overhanging eaves 1. The construction panel includes at least one unit section, each unit section is arranged along the width direction of the overhanging eaves, and all unit sections are arranged along the width of the overhanging eaves. direction distribution, and at the same time, adjacent unit sections are fixed together to form a skeleton under the overhanging eaves 1, the length of the skeleton is the width of the overhanging eaves 1, and the width of the skeleton is the length of the overhanging eaves 1.

The unit section is in a straight or L shape according to the shape of the overhanging eaves, wherein the L-shaped unit section is set at the corner of the overhanging eaves, so as to realize the construction under the corner of the overhanging eaves. In order to ensure the convenience of use, the length of the inline unit section is 2900~3100mm, preferably 3000mm; the bidirectional length of the L-shaped unit section does not exceed 1500mm, so as to ensure the length of the unit section, and it is convenient to carry out the unit section during use. connection use.

The unit section is composed of at least one truss, and adjacent trusses share one truss; each truss is arranged along the length direction of the overhanging eaves 1, and each truss is distributed along the width direction of the overhanging eaves 1. The length of the truss is 400-600mm longer than the length of the overhanging eaves 1, preferably 500mm, so as to ensure the construction under the overhanging eaves 1.

The truss includes upper chord 18, lower chord 20 and web 19, the lower chord 20 is made of 120×60×4 hot-dip galvanized square tube, and the upper chord 18 and web 19 are all made of 60×40×4 hot-dip galvanized square tube , the upper chord, lower chord and web are welded to form a truss. Every frame of the truss is connected by a cross bar 17, and the material of the cross bar 17 is a hot-dip galvanized square tube of 60×40×4, and each cross bar 17 and the truss are connected by bolts. The cross bars 17 are arranged along the width direction of the overhanging eaves 1, and each cross bar 17 on the same truss is distributed along the length direction of the overhanging eaves 1; wherein along the length direction of the overhanging eaves 1, the distance between adjacent cross bars 17 is ≤1220mm, thus ensuring Safe to use. The crossbars 17 on two adjacent trusses are staggered, that is, along the width direction of the overhanging eaves, the crossbars 17 on two adjacent trusses are not on the same straight line, thereby improving the strength of the construction panel and ensuring the safety of use . The springboard 12 is fully paved on the crossbar 17. The springboard 12 is made of bamboo plywood. When connecting the springboard 12 and the crossbar 17, 8 ^# galvanized iron wire can be used. The springboard 12 makes the upper part of the truss a walkable plane. , convenient for construction workers to use.

A skirting board 11 is arranged on the outer end of the truss. The height of the skirting board 11 is 150-200 mm, preferably 180 mm. The skirting board 11 provided can protect the construction panel, ensure the safety of the user, and improve the vertical direction of the construction panel at the same time. on the force strength.

In this embodiment, the definition of outside and inside is as follows: along the length direction of the overhanging eaves, the one close to the building is called inside, and the one far away is called outside.

An upper cantilever 2 is arranged above the truss, and the upper cantilever 2 is fixedly connected with the overhanging eaves 1; at the same time, the upper cantilever 2 is arranged along the length direction of the overhanging eaves 1, and the length of the upper cantilever 2 is ≤ 3500mm, and the upper cantilever overhangs the overhanging eaves The length is 450~550mm, preferably 500mm. In order to facilitate the suspension of the trusses, an upper cantilever 2 is correspondingly arranged above each truss, and each upper cantilever 2 is distributed along the width direction of the overhanging eaves 1 . In order to realize the connection between the upper cantilever 2 and the overhanging eaves 1, an external fixing device 4 is provided at the outer end of the overhanging eaves 1, and two inner fixing devices 4 are arranged on the overhanging eaves 1 at a distance of 2900-3100 mm from the outer end of the overhanging eaves 1, preferably 3000 mm. The fixing device 3 and the upper cantilever 2 are connected with the overhanging eaves 1 through the outer fixing device 4 and the inner fixing device 3 . The external fixing device and the internal fixing device both include two channel steels 23 fixedly connected to the cornice 1, the transverse distance between the two channel steels 23 is equal to the width of the upper cantilever 2, and the upper cantilever 2 is clamped on the outer fixing device And between the two channel steels of the internal fixture, and fixed by bolts. The disassembly of the upper cantilever 2 is facilitated by the channel steel 23; at the same time, an external fixing device and an internal fixing device are arranged on an upper cantilever 2 at the same time, which can make the connection between the upper cantilever 2 and the overhanging eaves 1 more stable.

There are suspenders connected between the truss and the upper cantilever 2, wherein the number of suspenders set on each truss is 2, which are respectively the outer suspender 5 located at the outer end of the truss and the inner suspender 6 located at the inner end of the truss .

The two ends of the outer boom 5 and the inner boom 6 are respectively welded with two connection plates 16, wherein the connection mode between the connection plate 16 and the outer boom and the inner boom is welding; the connection plate 16 is a 10 ^# groove with a length of 300mm Steel; the overlapping length of the connecting plate 16 and the outer suspender 5 and the inner suspender 6 is ≥150mm.

The connecting plates 16 at both ends of the outer boom 5 are respectively connected with the upper boom 2 and the lower chord 20 by bolts. The connecting plates 16 at both ends of the inner suspender 6 are respectively connected with the cornice 1 and the lower chord 20 by bolts, wherein the bolts are M12 stainless steel bolts. Here, two connecting plates are respectively provided at the two ends of the outer boom and the inner boom, thereby dispersing the force during connection, making the booms more stable during connection, and improving the safety of the suspension platform.

In order to reduce the force on the suspender, a steel wire rope 10 of Ф12 is connected to the middle of each truss. The way in which the steel wire rope is connected to the truss and the overhanging eaves is as follows: both ends of the steel wire rope 10 are wound around turnbuckle bolts 22, and the turnbuckle bolts 22 at both ends of the steel wire rope 10 are respectively fixed to the overhanging eaves and the lower chord; Three steel wire rope clamps 21 are arranged respectively, and the fixing of the steel wire rope 10 and the turnbuckle 22 is realized through the steel wire rope clamps 21 . Here, turnbuckle bolts 22 are selected to realize the connection between the steel wire rope and the overhanging eaves, so that the user can tighten the steel wire rope 10 as required, which is convenient to use.

Corresponding every truss is provided with inner safety rope base 8 and outer safety rope base 9 above the truss. The inner safety rope base 8 and the outer safety rope base 9 are fixed on the bottom of the overhanging eaves 1 . Wherein, the vertical distance between the inner safety rope base 8 and the outer end of the truss is 3900-4100 mm, preferably 4000 mm. The vertical distance between the outer safety rope base 9 and the outer end of the truss is 1400-1600 mm, preferably 1500 mm. A safety rope 9 is threaded on each inner safety rope base 8, and the safety rope 9 is arranged along the width direction of the overhanging eaves. Also wear the safety rope 9 that is provided with along the cornice width direction at each outer safety rope base. The safety rope 9 can be used directly when construction personnel are constructing, and then plays the effect of guaranteeing the user's safety.

In order to ensure the safety of use, a protective surface is provided around the edge of the construction panel, and the protective surface is connected between the overhanging eaves and the construction panel. The provided protective surface can surround the construction panel in a circumferential direction to ensure safe use.

The protective surface includes a horizontal cross bar 13, which is located at the end face of the construction panel. The adjacent outer suspenders are connected by three horizontal cross bars 13, and the adjacent inner suspenders are also connected by three horizontal cross bars. The adjacent outer suspenders and inner suspenders on the side of the construction panel are also connected by three horizontal bars 13 . The horizontal bar 13 is made of a 60×40×4 hot-dip galvanized steel square tube, and is connected with the suspender with M12 bolts. The distances between the three horizontal bars 13 and the surface of the truss are 500-700mm, 1100-1300mm and 1700-1900mm respectively, so as to provide vertical support for the protective surface.

Wherein, the end face and the side of the construction panel are the edges of the construction panel, the end face is located at the edge of the construction panel along the length direction of the overhanging eaves; the side is located at the edge of the construction panel along the width direction of the overhanging eaves.

The horizontal bar 13 outside is provided with dense mesh vertical net 15, and dense mesh vertical net 15 is a commercially available product.

A steel wire mesh is arranged on the outer side of the dense mesh vertical net 15, and the steel wire mesh includes a protective wire rope 14 diagonally tied between two adjacent suspenders. For the protective steel wire rope 14 located on the end face of the construction panel, it is set every two unit sections, thereby saving materials; for the protective steel wire rope 14 located on the side of the construction panel, its diagonal tie is arranged on the outer suspender and the inner suspender between the poles.

The suspension platform of the present invention can be directly suspended under the overhanging eaves, thereby facilitating the construction under the overhanging eaves. When the suspension platform is built, more bolts are used, which facilitates the recycling and use of materials, and the construction panels are directly suspended by suspenders. Below the overhanging eaves, the construction speed of the suspended platform is improved, and the protective surface provided ensures the safety of users when using the suspended platform.

The present invention also discloses a method for building the suspended platform for the construction of the exterior surface of the steel structure overhanging eaves, which includes the following steps:

1. Create a unit section;

The method of making a unit section is:

First, prepare at least one truss according to the length of the overhang 1. The length of the truss is 400~600mm longer than the length of the overhang, preferably 500mm; when preparing the truss, the bottom chord of the truss is 120×60×4 hot-dip galvanized Square tubes, top chords and webs are made of 60×40×4 hot-dip galvanized square tubes, and the trusses are prepared by welding the top chords, bottom chords and webs;

Then, according to the width of the overhanging eaves 1, the prepared trusses are connected together, two adjacent trusses share one truss, and the connected trusses form a unit section; according to the shape of the overhanging eaves, the unit section is in a straight or L shape, The length of the inline unit section is 2900~3100mm, preferably 3000mm; the bidirectional length of the L-shaped unit section does not exceed 1500mm, and the hoisting and installation of each unit section is facilitated by limiting the length of the unit section. For the number of unit sections, it is necessary to ensure that the sum of the lengths of each unit section is at least equal to the width of the overhanging eaves, so that the unit sections can form a suspended platform skeleton under the overhanging eaves.

2. Make the upper cantilever and connect the manufactured upper cantilever with the overhanging eaves;

First, select a hot-dip galvanized square tube with a length of ≤3500mm and a model of 120×60×4 to prepare the upper cantilever; for the number of the prepared upper cantilever, ensure that there is an upper cantilever above each truss; the upper cantilever 2 cantilever Pick out the outer end of the overhanging eaves 1 by 500mm, so as to avoid the suspension of the construction panel being affected by the insufficient length of the upper cantilever.

Then, an external fixing device is provided corresponding to each truss at the outer end of the overhanging eaves 1, and two internal fixing devices are arranged corresponding to each truss at a distance of 2900 to 3100 mm from the outer end of the overhanging eaves, preferably 3000 mm. The external fixing device and the internal fixing device are two channel steels 23 fixedly connected with the overhanging eaves 1, the transverse distance between the two channel steels 23 is equal to the width of the upper cantilever 2, and the upper cantilever 2 is clamped on the outer fixing device Between the two channel steels 23 of the internal fixing device, the connection between the upper cantilever 2 and the cornice 1 is realized. The set upper cantilever facilitates the suspension of the construction panel. Compared with only connecting the construction panel and the overhang 1, the set upper cantilever can disperse the pressure on the overhang 1, thereby ensuring safe use.

3. Construction panel suspension:

Firstly, the suspender is prepared, and the interception length is less than or equal to 3000mm, and the hot-dip galvanized square tube with a model size of 120×60×4 is used as the suspender. The suspender is divided into an outer suspender and an inner suspender.

Then, at the two ends of the suspender, welding two sections of length is 300mm respectively, and the model is the connection plate 16 of 10 ^# channel steel; When welding, the length of the overlapping part of the connection plate 16 and the suspension rod will be guaranteed to be not less than 150mm, so that Ensure that the connecting plate and the boom are connected firmly.

Finally, connect the connecting plates 16 at both ends of the outer suspender 5 with the upper cantilever 2 and the outer ends of the truss; connect the connecting plates 16 at both ends of the inner suspender 6 with the cornice 1 and the inner end of the truss. When connecting, it is necessary to ensure that the outer boom 5 and the inner boom 6 are kept vertical, and when the outer boom 5 and the inner boom 6 are connected to the truss, the lower chord of the truss must be connected.

4. Set the protective surface at the edge of the unit section:

First, connect the middle part of each truss with the overhanging eaves 1 through steel wire ropes 10;

In order to realize the connection of the overhanging eaves and the trusses, turnbuckle bolts are arranged on the overhanging eaves and the trusses, and the steel wire ropes are passed through the turnbuckle bolts and fixed by the steel wire rope clamps 21 . After the wire rope is connected, the wire rope 10 is tightened by the turnbuckle bolt 22, so that the wire rope 10 is in a tensioned state, so that the wire rope 10 bears the tension, shares the force of the suspension rod, and improves the safety of the suspension platform.

Then, at the end face of the construction panel, the adjacent outer suspenders and the adjacent inner suspenders are connected by three horizontal crossbars 13, wherein the connection mode between the horizontal crossbars 13 and the suspenders is: bolt connection, so that It is convenient to disassemble; at the same time, at the side of the construction panel, the inner suspender and the outer suspender are also connected by three horizontal cross bars.

The distances between the three horizontal bars and the surface of the truss are 500~700mm, 1100~1300mm and 1700~1900mm respectively, so that the horizontal bars can fully provide vertical support for the protective surface.

The horizontal bar is made of 60×40×4 hot-dip galvanized steel square tube, and its length is the distance between two outer hangers.

Wherein, the end face and the side of the construction panel are the edges of the construction panel, the end face is located at the edge of the construction panel along the length direction of the overhanging eaves; the side is located at the edge of the construction panel along the width direction of the overhanging eaves.

Subsequently, a steel wire mesh is set on the outside of the horizontal bar, and the steel wire mesh includes a protective steel wire rope, and the protective steel wire rope at the end face of the construction panel is then diagonally tied between two adjacent outer suspenders or two adjacent inner suspenders, And a diagonal tie is made every two unit sections to reduce costs; the protective steel wire rope on the side of the construction panel is diagonally tied between the outer suspender and the inner suspender.

Finally, a dense mesh vertical net 15 is set between the horizontal bar and the steel wire mesh, and the dense mesh vertical mesh 15 is bound on the steel wire mesh with iron wires.

5. Set wooden skirting boards at the outer end of the truss. The height of the skirting boards is 150~200mm, preferably 180mm, so as to ensure safe use.

6. Set a safety rope base at the lower part of the overhanging eaves, and put the safety rope through the safety rope base;

First, set the outer safety rope base and the inner safety rope base at the lower part of the eaves corresponding to each truss; the vertical distance between the inner safety rope base and the outer end of the truss is 3900~4100mm, preferably 4000mm; the distance between the outer safety rope base and the outer end of the truss The vertical distance between the ends is 1400-1600mm, preferably 1500mm.

Then, the inner safety rope base and the outer safety rope base are all passed through the safety rope 9 arranged along the width direction of the overhanging eaves, and the safety rope 9 provided can facilitate the use of construction personnel.

7. The springboard made of bamboo plywood is fully paved on the upper part of the truss, and 8 ^# galvanized iron wire is used to fix the springboard and truss. By paving the springboard 12 on the upper part of the truss, a flat construction plane is formed on the upper part of the truss, and construction personnel can place the scaffold on the construction panel for construction according to the height requirement, which is relatively safe to use.

The method for building the suspension platform for the construction of the exterior surface of the steel structure overhanging eaves according to the present invention has a compact process flow, and the connection speed is accelerated through the bolt connection, and at the same time, the material can be reused. The suspension platform built by this method is convenient, safe and suitable for use. It is suitable for the construction under the overhanging eaves of taller buildings.

The present invention also discloses a method for dismantling the suspension platform used for the construction of the exterior decoration surface of the above-mentioned steel structure overhanging eaves, which includes the following steps:

1. Remove the springboard on the truss, the method is: first, remove the 8 ^# galvanized iron wire connecting the springboard and the truss, and then remove the springboard from the truss;

2. Remove the safety rope, the method is: remove the safety rope from the inner safety rope base and the outer safety rope base;

3. Remove the skirting board, just remove the skirting board at the outer end of the truss.

4. Remove dense mesh vertical net and protective wire rope in sequence.

5. Remove the horizontal bar;

The bolts connecting the horizontal cross bar 13 and the suspension rod are removed to realize the removal of the horizontal cross bar 13 .

6. Remove the wire rope 10 between the truss and the overhanging eaves 1;

Remove the turnbuckle to separate the wire rope from the truss.

7. Remove the truss from the suspender and remove the bolts between the truss and the suspender. The sequence of separating the truss from the outer suspender and the inner suspender is as follows: first, separate the truss from the outer suspender; then, separate the truss from the outer suspender The inner suspenders are separated, which can avoid the large movement of the truss during the dismantling process and ensure the safety of the dismantling process.

8. Remove the suspender from the upper cantilever and overhanging eaves;

Remove the bolts connecting the connecting plate to the upper cantilever and the overhang, thereby removing the suspender from the overhang and overhang;

9. Remove the upper cantilever and loosen the bolts between the two channel steels so that the upper cantilever can be removed.

The method for removing the suspended platform for the construction of the outer decoration surface of the steel structure overhanging eaves described in the present invention has compact steps, a safe removal process, high removal efficiency, and no damage to the building where the steel structure overhanging eaves are located, ensuring that the building safety.

Claims (3)

1. The suspended platform for the construction of the outer surface of the steel structure overhanging eaves, which is characterized in that it includes a construction panel, a suspender and a protective surface connected between the construction panel and the overhanging eaves; The construction panel is fixed under the overhanging eaves through suspenders; The construction panel includes at least one unit section, each unit section is connected and distributed along the width direction of the overhanging eaves; the unit section is in the shape of a line or L-shaped, and the length of the line-shaped unit section is 2900~3100mm; the length of the L-shaped unit section is less than 1500mm; The unit section is composed of at least one truss. The length of the truss is 400~600mm longer than the length of the overhanging eaves. The trusses are arranged along the length of the overhanging eaves; The trusses share one truss; The protective surface is located at the edge of the construction panel and is arranged around the circumference of the construction panel. The protective surface includes a steel wire mesh and a dense vertical mesh located inside the steel mesh; the steel mesh includes a protective wire rope; There is a skirting board on the outer end of the truss, and the height of the skirting board is 150~200mm; The crossbar is a 60×40×4 hot-dip galvanized square tube; the adjacent crossbars along the width direction of the overhanging eaves are arranged staggered, and the distance between adjacent crossbars along the length direction of the overhanging eaves is ≤1220mm; Corresponding to each truss on the overhanging eaves, an upper cantilever is fixed, the upper cantilever is set along the length direction of the overhanging eaves, the length of the upper cantilever is ≤ 3500mm, and the length of the overhanging eaves cantilevered by the upper cantilever is 450~550mm; Two suspenders are arranged on each truss, and the two suspenders are respectively the outer suspender located at the outer end of the truss and the inner suspender located at the inner end of the truss; The two ends of the outer boom and the inner boom are respectively welded with two connecting plates, the overlapping length of the connecting plate and the outer boom and the inner boom is ≥150mm, and the connecting plates at both ends of the outer boom are respectively connected with the upper cantilever and the lower chord of the truss Connected by bolts; the connecting plates at both ends of the inner suspender are respectively connected to the overhanging eaves and the lower chord of the truss by bolts; The adjacent outer suspenders and the adjacent inner suspenders on the end face of the construction panel are connected by 3 horizontal bars, and the adjacent outer suspenders and inner suspenders on the side of the construction panel are also connected by 3 horizontal bars; The distances between the three horizontal bars and the surface of the truss are 500~700mm, 1100~1300mm and 1700~1900mm respectively; The middle part of each truss is fixedly connected with the upper cantilever by a wire rope; There is one external fixing device on the outer end of the overhanging eaves; two internal fixing devices are installed on the overhanging eaves at a distance of 2900~3100mm from the outer end of the overhanging eaves, and the upper cantilever is connected to the overhanging eaves through the external fixing device and the internal fixing device; The external fixing device and the internal fixing device are two channel steels fixedly connected with the overhanging eaves, and the upper cantilever is sandwiched between the two channel steels and fixed by bolts; The lower part of the overhanging eaves is provided with an inner safety rope base and an outer safety rope base corresponding to each truss; The vertical distance between the inner safety rope base and the outer end of the truss is 3900~4100mm; the vertical distance between the outer safety rope base and the outer end of the truss is 1400~1600mm; Both the inner safety rope base and the outer safety rope base are threaded with safety ropes arranged along the width direction of the overhanging eaves. 2. A method for building a suspended platform according to claim 1, characterized in that: comprising the steps of: a. Making unit sections; First, prepare at least one truss according to the length of the overhanging eaves. The length of the truss is 400~600mm longer than the length of the overhanging eaves. The lower chord of the truss is a 120×60×4 hot-dip galvanized square tube, and the upper chord and web are both selected. 60×40×4 hot-dip galvanized square tube, welded by upper chord, lower chord and web; Then, according to the width of the overhanging eaves, the prepared trusses are connected together. Two adjacent trusses share one truss, and the connected trusses form a unit section; The width of the font-shaped unit section is 2900~3100mm; the width of the L-shaped unit section is 1400~1600mm; b. Make the upper cantilever and connect the upper cantilever with the overhanging eaves; First, select a hot-dip galvanized square tube with a model size of 120×60×4 and a length of ≤3500mm to prepare an upper cantilever, and the number of the upper cantilever is equal to the number of trusses; Then, set up an external fixing device corresponding to each truss on the outer end of the overhanging eaves with the upper cantilever, and set two internal fixing devices on the overhanging eaves corresponding to each truss at a distance of 2900~3100mm from the end of the overhanging eaves; Among them, the external fixing device and the internal fixing device are two channel steels fixedly connected with the overhanging eaves, and the upper cantilever is clamped between the two channel steels of the external fixing device and the internal fixing device, and the upper cantilever and the channel steel are fixed by bolts. Together, realize the connection between the upper cantilever and the overhanging eaves; ensure that there is an upper cantilever above each truss; c. Hanging construction panels: First of all, prepare the boom, intercept the 120×60×4 hot-dip galvanized square tube with a length of ≤3000mm, and use it as the boom. The boom is divided into an outer boom and an inner boom; Then, at both ends of the suspender, weld two 300mm-long 10 ^# channel steel connecting plates respectively, and ensure that the length of the overlapping part of the connecting plate and the suspender is not less than 150mm during welding; Subsequently, the connecting plates at both ends of the outer boom are respectively connected with the outer ends of the upper cantilever and the truss by bolts; the connecting plates at both ends of the inner boom are respectively connected with the inner ends of the eaves and the truss by bolts; , to ensure that both the outer boom and the inner boom are in a vertical state. When the outer boom and the inner boom are connected to the truss, the lower chord of the truss must be connected; d. Set the protective surface at the edge of the unit section: Firstly, connect the middle part of each truss to the overhanging eaves with a steel wire rope, and the steel wire rope is in a tensioned state; Then, the adjacent outer suspenders and adjacent inner suspenders on the end face of the construction panel are connected by three horizontal bars, and the inner suspenders and outer suspenders on the side of the construction panel are also connected by three horizontal bars. ; The distances between the three horizontal bars and the surface of the truss are 500~700mm, 1100~1300mm and 1700~1900mm respectively; among them, the horizontal bars are made of 60×40×4 hot-dip galvanized steel square tubes; Subsequently, a steel wire mesh is set at the edge of the construction panel; the steel wire mesh includes protective steel wire ropes, and the protective steel wire ropes located on the end face of the construction panel are diagonally tied on the outer suspenders of the unit sections, and a diagonal tie is made every two unit sections Knot; the protective wire rope located on the side of the construction panel is tied diagonally between the outer and inner suspenders; Finally, a dense mesh vertical net is set between the horizontal bar and the steel wire mesh, and the dense mesh vertical mesh is fixed on the steel wire mesh; e. Set wooden skirting boards on the end of the truss, and the height of the skirting boards is 150~200mm; f. Set a safety rope base at the lower part of the overhanging eaves, and pass the safety rope through the safety rope base; Firstly, an outer safety rope base and an inner safety rope base are correspondingly set above each truss; The vertical distance between the inner safety rope base and the outer end of the truss is 3900~4100mm; the vertical distance between the outer safety rope base and the outer end of the truss is 1400~1600mm; Then, the inner safety rope base and the outer safety rope base are respectively threaded with safety ropes arranged along the width direction of the overhanging eaves; g. The springboard made of bamboo plywood is fully paved on the upper part of the truss, and 8 ^# galvanized iron wire is used to fix the springboard and truss. 3. A method for removing the suspended platform according to claim 1, characterized in that: comprising the steps of: Remove the springboard on the truss; remove the 8 ^# galvanized iron wire, and then remove the springboard from the truss; Remove the safety rope; remove the safety rope from the inner safety rope base and the outer safety rope base; remove skirting boards; Remove the protective wire rope; Remove the horizontal cross bar; remove the bolts connecting the horizontal cross bar and the outer suspender to realize the removal of the horizontal cross bar; Remove the wire rope between the construction panel and the cornice; remove the turnbuckle bolts to separate the wire rope from the truss; Remove construction panels from booms; Remove the bolts between the truss and the boom. When separating the truss from the outer boom and the inner boom, first separate the truss from the outer boom, and then separate the truss from the inner boom; Remove the boom from the upper cantilever and overhang; Remove the upper cantilever; loosen the bolts between the two channel steels, and then remove the upper cantilever.