CN114278114A - Method for dismantling multi-layer continuous cantilever plate outside high-rise building - Google Patents
Method for dismantling multi-layer continuous cantilever plate outside high-rise building Download PDFInfo
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- CN114278114A CN114278114A CN202210121193.0A CN202210121193A CN114278114A CN 114278114 A CN114278114 A CN 114278114A CN 202210121193 A CN202210121193 A CN 202210121193A CN 114278114 A CN114278114 A CN 114278114A
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Abstract
The invention discloses a method for dismantling a multi-layer continuous cantilever slab outside a high-rise building, which adopts a high-rise building continuous reinforced concrete cantilever slab dismantling system consisting of a cutting machine, a hand-operated hoist and a rope belt to replace the traditional chiseling and removing, and the dismantled cantilever slab can be reused, saves energy and is environment-friendly. Adopt the concrete cutting machine to cut, through the fixed board of encorbelmenting of hand calabash and fag end, utilize the upper strata board of encorbelmenting as the stress point, unload the board monoblock of encorbelmenting and transport out of the court. The invention solves the problems of high construction difficulty and long construction period of the traditional chiseling and breaking of the external auxiliary structure of the building structure.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a method for dismantling a multi-layer continuous cantilever plate outside a high-rise building.
Background
Along with the development of modern society, the aesthetic level of people is continuously improved, the glass curtain wall has the decoration effect besides the original functions of safety, green energy conservation and the like, and can greatly improve the ornamental value and the artistic quality of buildings, so that the glass curtain wall is widely applied.
Need demolish at some building structure's outside additional construction and reform transform under the condition with the installation curtain, outside additional construction adopts traditional chisel to break, will produce the disturbance to main building structure, and the noise is big, and the dust is many, and the construction degree of difficulty is big, and construction operation danger coefficient is high, need cut the reinforcing bar of choosing the board in addition after breaking, breaks the position unevenness and need repair in addition, influences construction period greatly.
Disclosure of Invention
In order to overcome the defects in the prior art, the method for dismantling the multi-layer continuous cantilever plates outside the high-rise building is provided so as to solve the problems of high construction difficulty and long construction period of the traditional chiseling method for breaking the external auxiliary structure of the building structure.
In order to realize the aim, the method for dismantling the multi-layer continuous cantilever plate outside the high-rise building comprises the following steps:
a. measuring and paying off the cantilever plate to be dismantled to determine a cutting line;
b. installing a guide rail on a main body structure of a high-rise building, and installing a cutting machine on the guide rail, so that the cutting machine can cut along the cutting line;
c. the hand hoist is hung on the upper layer of the cantilever plate to be dismantled through a rope belt;
d. installing a hanging ring on the to-be-dismantled cantilever plate, connecting the hanging ring to the hand hoist through a sling, and adjusting the hand hoist to tension the sling;
e. the cutting machine is started to wet-cut the cantilever plate to be removed along the cutting line, and after the cantilever plate to be removed is separated from the main body structure, the cut cantilever plate to be removed is lowered to the ground through a manual hoist to serve as a sand basin, a well cover of a temporary water collecting well or a temporary road pavement slab of a construction site;
f. and (e) repeating the steps a to e to dismantle the multi-layer cantilever slabs of the high-rise building from bottom to top.
Further, when step c is implemented, in the outer fringe at the top of last layer board of encorbelmenting installs spacing crab-bolt, will again the middle part of fag end twine in last layer board of encorbelmenting makes the fag end set up in being close to of spacing crab-bolt one side of major structure is in order to avoid the fag end slippage last layer board of encorbelmenting.
Furthermore, rings are connected with the chemical anchor bolt, the operation is implanted to the chemical anchor bolt and is waited to demolish in the top of overhanging plate.
Furthermore, the number of the hanging rings is two, and the two hanging rings are arranged along the length direction of the board to be dismantled.
Further, the wet cutting is to spray water to a cutting blade of the cutting machine when the cutting machine cuts, so that dust generated by the cutting machine adheres to the sprayed water.
The method for dismantling the multi-layer continuous cantilever slabs outside the high-rise building has the advantages that a high-rise building continuous reinforced concrete cantilever slab dismantling system consisting of a cutting machine, a hand-operated hoist and a rope belt is adopted to replace traditional chiseling and breaking, and the dismantled cantilever slabs can be reused, are energy-saving and environment-friendly. Adopt the concrete cutting machine to cut, through the fixed board of encorbelmenting of hand calabash and fag end, utilize the upper strata board of encorbelmenting as the stress point, unload the board monoblock of encorbelmenting and transport out of the court. Through the dismantling method, the bearing capacity of the existing structure is fully utilized, the operation difficulty is reduced, the construction danger is reduced, the cutting surface is flat, the later-stage repair is not needed, the construction quality can be guaranteed, the implementation is convenient, the construction speed is high, no dust exists in the whole dismantling process, no pollution is caused to the outside, the method is green and environment-friendly, the disturbance to the main building structure is avoided, the cantilever plate unloaded can be used as a well cover of a sand basin and a temporary water collecting well or a temporary road pavement slab, and the cost is saved through secondary utilization.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:
fig. 1 is a schematic structural view of a multi-story continuous cantilever slab outside a high-rise building according to an embodiment of the present invention.
Fig. 2 is a schematic view of the installation position of the guide rail according to the embodiment of the present invention.
Fig. 3 is a schematic structural view of a cantilever plate on the upper floor outside a high-rise building according to an embodiment of the invention.
Fig. 4 is a front view of a cantilever board of an upper floor outside a high-rise building according to an embodiment of the present invention.
Fig. 5 is a top view of a previous layer of cantilever slabs outside a high-rise building according to an embodiment of the present invention.
Fig. 6 is a schematic structural view of a cantilever plate to be dismantled outside a high-rise building according to an embodiment of the present invention.
Fig. 7 is a front view of a cantilever board to be dismantled outside a high-rise building according to an embodiment of the present invention.
Fig. 8 is a plan view showing the arrangement of the cantilever plates of the same floor outside the high-rise building according to the embodiment of the present invention.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1 to 8, the present invention provides a method for removing a multi-story continuous cantilever slab from a high-rise building, comprising the steps of:
a. the pay-off is measured on the cantilever 1 to be removed to determine the cutting line.
In this embodiment, as shown in fig. 8, a cantilever plate is cast on the outer surface of the main structure of the high-rise building. The cantilever plate is of a reinforced concrete structure. The size of the cantilever plate is 2075mm (length) x 400mm (width) x 200mm (height), and the concrete strength grade is C30. And a plurality of cantilever plates on the same layer are arranged at intervals of 2075mm in the horizontal direction.
At the time of the dismantling construction, the dismantling order of the cantilever plates is determined. In the vertical direction, dismantling from bottom to top; in the horizontal direction, the disassembly is carried out in two groups as shown in fig. 8, mechanical equipment and personnel are put in place, and the entry acceptance of the mechanical equipment and accessories is made. The acceptance inspection is mainly used for inspecting the bearing capacity and the qualification of the hoisting rings, the suspension ropes (iron chains) and the rope belts, the mechanical performance of the hand-operated block or the hand-operated block, and the temporary electricity utilization and water application in place.
Then, a special measuring person puts out the control axis in the floor, and then a cutting positioning line, namely a cutting line A, is popped out and ejected at the junction of the cantilever plate and the main floor structure. The error of the positioning line is not more than 10mm, and the positioning line is popped up by using an ink fountain to ensure that the cutting position is accurate.
b. A guide rail 2 is installed on a main structure 8 of a high-rise building, and a cutting machine is installed on the guide rail 2, so that the cutting machine can cut along the cutting line.
And fixing the concrete cutting machine according to the position of the cutting line. Specifically, the guide rail is placed on a concrete beam surface of the main structure, and expansion bolts are driven at intervals of 400mm to fix the guide rail. The cutter is movably mounted on the guide rail. The guide rail is arranged along the length direction of the cutting line.
c. And hoisting the hand hoist 3 on the upper layer of the cantilever plate 1 to be dismantled through a rope belt 4.
The concrete cantilever plate to be dismantled on site has a single block size of 2075mm in length, 400mm in width and 200mm in height. The estimated total weight of the single cantilever plate is about 2.075 multiplied by 0.4 multiplied by 0.2 multiplied by 2500 which is 415kg, and a rope belt with the bearing capacity of 3t is selected to be fixed on the upper layer of the uncut cantilever plate for ensuring the construction safety. Referring to fig. 3 to 5, the contact position of the rope belt and the upper portion of the take-up plate is processed to prevent scraping, and an anchor bolt is arranged outside the rope belt to prevent outward sliding.
Specifically, install spacing crab-bolt 7 at the outer fringe at the top of the board of encorbelmenting of last layer, will again the middle part of fag end 4 twine in the board of encorbelmenting of last layer makes fag end 4 set up in being close to of spacing crab-bolt 7 one side of major structure 8 is in order to avoid fag end 4 slippage the board of encorbelmenting of last layer.
d. And installing a lifting ring 6 on the board to be dismantled 1, connecting the lifting ring 6 to the hand hoist 3 through a sling 5, and adjusting the hand hoist 3 to tension the sling 5.
The lifting ring 6 is connected with a chemical anchor bolt which is implanted into the top of the cantilever plate 1 to be dismantled in the operation. The number of the hanging rings 6 is two, and the two hanging rings 6 are arranged along the length direction of the cantilever plate 1 to be dismantled.
The weight of waiting to demolish concrete cantilever plate is calculated according to the size of encorbelmenting, sets up the rings that need implant (this rings should be regarded as the permanent rings that later stage apron used). The position of the hanging ring is 0.2L (L is the length of the board) away from the end part of the board to be hung along the long side direction (length direction) of the board to be hung, and is 0.5d (d is the width of the board to be hung) away from the end part of the board to be hung along the short side direction (width direction) of the board to be hung.
In this embodiment, the suspension cable is an iron chain, wherein the iron chain and the suspension ring are not directly connected, and need to be connected by a snap ring.
e. Open the cutting machine is followed the cutting line wet cutting wait to demolish board 1 of encorbelmenting with after 8 separation major structure, will cut down through hand block 3 wait to demolish board 1 of encorbelmenting and transfer to ground in order to be as the well lid or the interim road pavement board of grit chamber, the interim sump pit of job site.
And before the cantilever plate is dismantled and the cutting is started, checking whether the rear embedded lifting ring is firm and whether the sling is in a tensioned state again. After all work is confirmed, the cantilever plates to be removed are cut, the cantilever plates on the same layer are removed according to the removing sequence of the cantilever plates on the same layer shown in the figure 8, cutting is started from the diagonal positions at the same time, and the cantilever plates on the previous layer are used as stress points to prevent the cantilever plates from falling. The whole cutting process is wet operation, no dust pollution is caused, the surrounding construction environment is not polluted, and the method is green and environment-friendly.
Wet cutting is to spray water to a cutting blade of a cutting machine when the cutting machine cuts, so that dust generated from the cutting machine adheres to the sprayed water.
After the cantilever plate is cut, the cantilever plate component is lifted or lowered to the ground by using a hand hoist, the upper layer of cantilever plate is utilized as a stress point, the whole cantilever plate is unloaded and transported out of the field, and the cantilever plate is transported to a specified place to be stacked by matching with a pallet truck. And checking and accepting the cutting construction quality of the cantilever plate by a manager, and checking the flatness of a cutting surface.
The unloaded cantilever plate can be used as a well cover of a sand basin or a temporary water collecting well on a construction site or a temporary road pavement slab.
f. And (e) repeating the steps a to e to dismantle the multi-layer cantilever slabs of the high-rise building from bottom to top.
According to the method for dismantling the multi-layer continuous cantilever plate outside the high-rise building, a high-rise building continuous reinforced concrete cantilever plate dismantling system consisting of a cutting machine, a hand-operated hoist and a rope belt is adopted to replace traditional chiseling and removing, and the dismantled cantilever plate can be reused, is energy-saving and environment-friendly. Adopt the concrete cutting machine to cut, through the fixed board of encorbelmenting of hand calabash and fag end, utilize the upper strata board of encorbelmenting as the stress point, unload the board monoblock of encorbelmenting and transport out of the court. Through the dismantling method, the bearing capacity of the existing structure is fully utilized, the operation difficulty is reduced, the construction danger is reduced, the cutting surface is flat, the later-stage repair is not needed, the construction quality can be guaranteed, the implementation is convenient, the construction speed is high, no dust exists in the whole dismantling process, no pollution is caused to the outside, the method is green and environment-friendly, the disturbance to the main building structure is avoided, the cantilever plate unloaded can be used as a well cover of a sand basin and a temporary water collecting well or a temporary road pavement slab, and the cost is saved through secondary utilization.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (5)
1. A method for dismantling a multi-layer continuous cantilever plate outside a high-rise building is characterized by comprising the following steps:
a. measuring and paying off the cantilever plate to be dismantled to determine a cutting line;
b. installing a guide rail on a main body structure of a high-rise building, and installing a cutting machine on the guide rail, so that the cutting machine can cut along the cutting line;
c. the hand hoist is hung on the upper layer of the cantilever plate to be dismantled through a rope belt;
d. installing a hanging ring on the to-be-dismantled cantilever plate, connecting the hanging ring to the hand hoist through a sling, and adjusting the hand hoist to tension the sling;
e. the cutting machine is started to wet-cut the cantilever plate to be removed along the cutting line, and after the cantilever plate to be removed is separated from the main body structure, the cut cantilever plate to be removed is lowered to the ground through a manual hoist to serve as a sand basin, a well cover of a temporary water collecting well or a temporary road pavement slab of a construction site;
f. and (e) repeating the steps a to e to dismantle the multi-layer cantilever slabs of the high-rise building from bottom to top.
2. The method as claimed in claim 1, wherein in the step c, a limit anchor is installed at an outer edge of a top of the upper cantilever, and a middle portion of the rope is wound around the upper cantilever, so that the rope is disposed at a side of the limit anchor close to the main structure to prevent the rope from slipping off the upper cantilever.
3. The method for demolishing a multi-story continuous cantilever slab outside a high-rise building according to claim 1, wherein the hanging ring is connected with a chemical anchor bolt implanted in a top portion of the cantilever slab to be demolished.
4. The method for dismantling the multi-storey continuous cantilever slabs outside the high-rise building according to claim 2, wherein the number of the hanging rings is two, and the two hanging rings are arranged along the length direction of the cantilever slabs to be dismantled.
5. The method for demolishing a multi-story continuous cantilever panel outside a high-rise building according to claim 1, wherein the wet cutting is to spray water to a cutting blade of the cutter at the time of cutting by the cutter so that dust generated from the cutter adheres to the sprayed water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210121193.0A CN114278114A (en) | 2022-02-09 | 2022-02-09 | Method for dismantling multi-layer continuous cantilever plate outside high-rise building |
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| CN202210121193.0A CN114278114A (en) | 2022-02-09 | 2022-02-09 | Method for dismantling multi-layer continuous cantilever plate outside high-rise building |
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Cited By (1)
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| CN114922463A (en) * | 2022-05-27 | 2022-08-19 | 中建二局第三建筑工程有限公司 | Vibration-free cantilever plate block dismantling construction method |
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Cited By (2)
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| CN114922463A (en) * | 2022-05-27 | 2022-08-19 | 中建二局第三建筑工程有限公司 | Vibration-free cantilever plate block dismantling construction method |
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