A method for removing I-beams of hanging flower baskets on exterior walls

Abstract

The method for dismantling the hanging flower basket I-beam on the external wall of the present invention relates to the technical field of building construction. The present invention dismantles the scaffolding and retains the first step scaffolding body; uses the first step scaffolding body as the construction work surface to dismantle the upper pull rod, passes a rope through the ear plate hole of the flower basket I-beam and firmly knots it, fixes the other rope loop to the anchor end of the flower basket I-beam, introduces the lifting ends of the two ropes into the room, and dismantles the first step scaffolding body; then hangs the lifting ends of the two ropes on the hook indoors, and removes the fastening nut of the flower basket I-beam on one side indoors; withdraws the fastening bolt of the flower basket I-beam, and lifts the flower basket I-beam from the external wall by the hook. The present invention can dismantle the flower basket I-beam in the air by the suspension method indoors, so that there is no need to leave a lower layer of scaffolding to provide a work surface for dismantling the upper layer of scaffolding and the flower basket I-beam.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a method for removing an I-beam of a suspended flower basket on an external wall. Background Art

[0002] Cantilever scaffolding is a cantilever structure that extends outward from the edge of the building structure to support the external scaffolding, transferring all or part of the scaffolding load to the building structure. The cantilever support structure of the cantilever scaffolding must have sufficient strength, stability and rigidity, and be able to transfer the scaffolding load to the building structure.

[0003] At present, the number of projects in the construction industry that use flower basket I-beams as cantilever support structures for floor cantilever scaffolding is gradually increasing. Compared with traditional floor slab anchor I-beams, flower basket I-beams have the advantages of short length, standardization, and quick assembly and disassembly. However, the final dismantling process of flower basket I-beams has the defects of extending the construction period and greater safety hazards, as follows:

[0004] First of all, many projects now dismantle scaffolding and flower basket I-beams, usually using the principle of "top-down, first erect and then dismantle". The disadvantage of this method is that the next layer of scaffolding only provides a working surface for the dismantling of the upper layer of scaffolding and flower basket I-beams, and it needs to be retained until the upper layer of scaffolding and flower basket I-beams are dismantled before the scaffolding can be dismantled. This not only prolongs the steel pipe material rental period and increases material costs, but also the retention of the next layer of scaffolding occupies the overall site, making it impossible to carry out the overall ground engineering construction, prolonging the insertion node of the next process, and indirectly prolonging the construction period.

[0005] Secondly, when the dismantling workers stand on the next scaffolding to dismantle the upper scaffolding and the flower basket I-beams, the dismantling operation is often the focus of safety management because of the safety hazards such as falling objects from high altitude and working on the edge. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a method for dismantling the suspended flower basket I-beam on the exterior wall. The dismantling personnel can dismantle the flower basket I-beam in the air by a suspension method indoors, thereby eliminating the need to leave a lower layer of scaffolding to provide a working surface for dismantling the upper layer of scaffolding and the flower basket I-beam.

[0007] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0008] A method for removing an I-beam of an external wall suspended flower basket comprises the following steps:

[0009] S1. Remove the scaffolding on the flower basket I-beam and keep the first step scaffolding body;

[0010] S2. Remove the upper tie rod tied to the ear hole of the turnbuckle I-beam;

[0011] S3. Pass a rope through the ear plate hole of the flower basket I-beam and tie a knot firmly, and fix the other rope loop to the anchor end of the flower basket I-beam, and then introduce the lifting ends of the two ropes into the room;

[0012] S4, dismantle the first step scaffolding;

[0013] S5. Move the hook of the lifting device to the outdoor area near the lifting ends of the two ropes, and have the indoor personnel hang the lifting ends of the two ropes onto the hook, and remove the fastening nuts of the I-beam on the indoor side;

[0014] S6. Remove the fastening bolts of the flower basket I-beam and use the hook to lift the flower basket I-beam away from the outer wall.

[0015] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0016] 1. Safer than traditional I-beam removal: When the outer frame steel pipes and fasteners of the first step scaffolding body are removed and only the flower basket I-beam is left, the demolition personnel can use the suspension method to remove the I-beam in mid-air without standing outdoors. During the removal process of the flower basket I-beam, the workers complete the process of hanging the hook and removing the fastening nuts of the flower basket I-beam indoors, and no outdoor work is performed, thus ensuring the safety protection rate.

[0017] 2. The removal of I-beams is faster and more convenient: the I-beam body of the flower basket is tied with an extended rope, and the lifting and hoisting of the external wall flower basket I-beam is completed through the lifting device. 2-3 flower basket I-beams can be removed at the same time, which is faster than the original method.

[0018] 3. Compared with the traditional process of dismantling scaffolding and flower basket I-beams, which requires retaining the next layer of scaffolding as a tread surface for workers to facilitate the dismantling of the upper layer of scaffolding, this method does not need to retain the next layer of scaffolding. The scaffolding and flower basket I-beams can be dismantled in the air while the upper layer of the frame is suspended. This can shorten the retention period of the next layer of scaffolding, improve material turnover efficiency, and reduce the rental cost of turnover materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic flow chart of a method for removing an I-beam of an external wall suspended flower basket according to the present invention;

[0021] Figure 2 It is a schematic diagram of on-site construction of a method for dismantling an I-beam of a suspended flower basket on an exterior wall according to the present invention.

[0022] The numbers in the figure are: 1. First step scaffolding body; 2. Flower basket I-beam; 21. Ear plate hole; 3. Upper pull rod; 4. Traction rope; 5. Balance rope; 6. Fastening bolt; 7. Hook. DETAILED DESCRIPTION

[0023] The present invention will be described in detail below with reference to the exemplary embodiments in the accompanying drawings. However, it should be understood that the present invention can be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. These embodiments are provided herein to make the disclosure of the present invention more complete and to fully convey the concept of the present invention to those skilled in the art.

[0024] Please refer to Figure 1 and Figure 2 In one embodiment of a method for removing an external wall suspended flower basket I-beam provided by the present invention, the method comprises the following steps:

[0025] S1. Before dismantling the flower basket I-beam 2, first dismantle the scaffolding on the flower basket I-beam 2 to reduce the load on the flower basket I-beam 2 and improve construction safety; when dismantling the scaffolding, retain the first step scaffolding body 1 in the scaffolding as the construction working surface of S2, S3 and S4.

[0026] S2, remove the upper tie rod 3 tied to the ear plate hole 21 of the basket I-beam 2; because the tie point of the traction rope 4 of S3 is located at the ear plate hole 21, and the ear plate hole 21 as the tie point of the upper tie rod 3 conflicts with the tie point of the traction rope 4, it is necessary to remove the upper tie rod 3 first. It should be clear that after the upper tie rod 3 is removed, the basket I-beam 2 can support the load of the two-step scaffolding body without unloading the upper tie rod 3.

[0027] S3. Pass one rope as a traction rope 4 through the ear plate hole 21 of the flower basket I-beam 2 and tie a knot firmly, and use another rope as a balance rope 5 to fix it on the anchor end of the flower basket I-beam 2. The function of the balance rope 5 is to ensure that the I-beam is in a two-point balanced lifting state during the lifting and hoisting process. The above two ropes can be made of nylon chemical fiber rope with a diameter of 20 mm. After the two ropes are tied, the lifting ends of the two ropes are introduced into the room.

[0028] S4. External frame personnel dismantle the first scaffolding body 1, remove the steel pipe materials removed from the flower basket I-beam 2, and ensure that there are no obstacles when the flower basket I-beam 2 is suspended and pulled out. Before dismantling the first scaffolding body 1, the rope tensioning degree can be inspected and accepted to ensure that the rope is in an effective traction state.

[0029] S5. Move the hook 7 of the lifting device to the outdoor area near the lifting ends of the two ropes, and have the indoor personnel hang the lifting ends of the two ropes on the hook 7. During actual operation, the rod can be used to extend the hanging distance of the two ropes according to the specific conditions on site to avoid outdoor operations and improve safety. After the hanging is completed, remove the fastening nut of the I-beam on the indoor side.

[0030] S6. Remove the fastening bolts 6 of the flower basket I-beam 2, and lift the flower basket I-beam 2 away from the outer wall by the tower crane hook 7. The tower crane commander should command the hook 7 to rise and straighten the two lifting ropes before the fastening bolts 6 of the flower basket I-beam 2 are completely removed from the wall, to prevent the ropes from shaking greatly when the I-beam is removed in a loose state.

[0031] Among them, considering that the ropes are prone to relaxation and fatigue after being placed for a long time, it is best to complete the lifting of the flower basket I-beam 2 within 1-2 days after the lifting ends of the two ropes in S3 are introduced into the room.

[0032] In addition, in S3, the lifting ends of the ropes corresponding to each flower basket I-beam 2 can be numbered in sequence to prevent confusion when lifting multiple flower basket I-beams 2 at the same time.

[0033] In addition, it is preferred that the lifting ends of the two ropes are introduced into the indoor bay window or balcony position in S3, so that the tower crane hook 7 is convenient to approach, and it is also easier for indoor personnel to hang the lifting ends of the two ropes on the hook 7.

[0034] In addition, considering that it is difficult for the hook 7 to approach the gable wall, a certain length should be reserved after the two ropes corresponding to the flower basket I-beam 2 at the gable position are introduced into the room so that workers can hang the ropes on the hook 7 indoors.

[0035] The method of removing the hanging flower basket I-beam of the exterior wall has obvious economic benefits in practical application. Taking the general contracting of the shantytown reconstruction project in Longzhou County as an example, the use of the suspension method to remove the external frame plus the flower basket I-beam construction method greatly reduces the cost of safety measures and labor costs during the removal process, and saves 211,380 yuan compared with the cost of traditional demolition operations. See the following table (cost table of each cantilever layer) for details:

[0036]

[0037] It can be concluded that the general contractor of the Longzhou County Shantytown Reconstruction Project has a total of 3 cantilevered floors in one high-rise residential building, and there are 13 buildings in Block B with a total of 39 cantilevered floors, saving costs: 12010*39-6590*39=211380 yuan.

[0038] The method of removing the I-beam of the hanging flower basket on the exterior wall of the present invention has also been applied to multiple construction projects in Guangxi:

[0039] 1. The general contractor of the Longzhou County Shantytown Reconstruction Project, which was constructed by Guangxi Construction Engineering Group Construction Engineering General Contracting Co., Ltd., is Longzhou County Construction Investment Co., Ltd. The project is located in Longzhou County, Chongzuo City, Guangxi, with a total construction area of ​​about 731,235.05 square meters, including 520,061.63 square meters of high-rise residential buildings, 34,131.57 square meters of street shops, 13,380.93 square meters of shopping malls, 29,406.27 square meters of low-rise residential buildings, 1,953.59 square meters of neighborhood committee and property management rooms, 4,014.46 square meters of kindergartens (12 classes), and 122,663.92 square meters of underground garages. This project adopted this method to dismantle the cantilevered flower basket I-beams on the floor. The construction is convenient and fast, and the personnel can complete the lifting and dismantling operations indoors. At present, this method has been used to successfully complete the dismantling of the scaffolding cantilevered flower baskets on 25 high-rise residential buildings on site. The use is good, indicating that the application of this method has certain practical value and has achieved good economic and social benefits.

[0040] 2. The Zhuang Jinxiu Capital Qingnanfu Cultural Tourism and Commercial City, constructed by Guangxi Construction Engineering Group Construction Engineering General Contracting Co., Ltd., has 1#, 2#, 5#, 6#, 8#, 9#, 10#, 11# buildings and basements, covering a total area of ​​7586.2 square meters and a total construction area of ​​134449.45 square meters. Buildings 5#, 6#, 9#, 10#, and 11# have 1 underground floor and 33 floors above ground; Buildings 1# and 2# have 0 underground floors and 6 floors above ground; Building 8# has 0 underground floors and 4 floors above ground. The project adopts the method of removing the I-beams of the suspended flower baskets on the exterior wall provided by the present invention to remove the I-beams of the suspended flower baskets on the floors on site. The construction is convenient and quick, and personnel can complete the lifting and removal operations indoors. At present, the method has been used to successfully complete the removal of the I-beams on the scaffolding suspended flower baskets of 5 buildings on site, and the use is good, indicating that the application of this method has certain practical value and has achieved good economic and social benefits.

[0041] 3. The Orchid Garden Demonstration Community in the Yachang Nature Reserve, constructed by Guangxi Guanghui Construction Investment Group Co., Ltd., is located in Leye County, Baise City. It has three residential buildings, one underground floor, 32 floors above ground in Building 1#, a building height of 98.370m, a building area of ​​529.08㎡, and a building area of ​​15748.57㎡. Buildings 2# and 3# have 18 floors above ground, a building height of 53.970m, a building area of ​​522.92㎡, and a building area of ​​9847.02㎡. The building used the rope traction demolition method to demolish the cantilevered flower basket I-beams on the floor. The rope traction demolition of the cantilevered flower basket I-beams is effective and feasible. At present, this method has been used to successfully complete the demolition of the cantilevered flower basket I-beams on the scaffolding on site. The use is good and there are no safety hazards during the demolition process. It shows that the application of this method has certain practical value and has achieved good economic and social benefits.

[0042] It should be understood that all the above embodiments are illustrative rather than restrictive, and various modifications or variations made by those skilled in the art to the specific embodiments described above under the concept of the present invention should be within the protection scope of the present invention.

Claims

1. A method for removing an I-beam hanging from an exterior wall, characterized in that: The following steps are involved: S1, dismantle the scaffolding on the flower basket I-beam (2), and retain the first step scaffolding body (1); S2, removing the upper tie rod (3) tied to the ear plate hole (21) of the turnbuckle I-beam (2); S3, pass a rope through the ear plate hole (21) of the flower basket I-beam (2) and tie a knot firmly, and fix the other rope loop to the anchor end of the flower basket I-beam (2), and then introduce the lifting ends of the two ropes into the room; S4, dismantling the first scaffolding body (1); S5, move the hook (7) of the lifting device to the outdoor area near the lifting ends of the two ropes, and have the indoor personnel hang the lifting ends of the two ropes onto the hook (7), and remove the fastening nut of the basket I-beam (2) on the indoor side; S6. Remove the fastening bolts (6) of the flower basket I-beam (2), and lift the flower basket I-beam (2) away from the outer wall by the lifting hook (7); before the fastening bolts (6) of the flower basket I-beam (2) are completely removed from the wall, the lifting hook (7) rises to straighten the two ropes.

2. A method for removing an external wall hanging flower basket I-beam as claimed in claim 1, characterized in that: The lifting ends of the ropes corresponding to the plurality of flower basket I-beams (2) in S3 are numbered in sequence.

3. A method for removing an external wall hanging flower basket I-beam as claimed in claim 1, characterized in that: In S3, the lifting ends of the two ropes are introduced into the indoor bay window or balcony position.

4. A method for removing an external wall hanging flower basket I-beam as claimed in claim 1, characterized in that: The lifting of the flower basket I-beam (2) is completed within 1-2 days after the lifting ends of the two ropes in S3 are introduced into the room.

5. A method for removing an external wall hanging flower basket I-beam as claimed in claim 1, characterized in that: After the first step of dismantling the scaffolding body (1) in S4, the steel pipe material removed from the flower basket I-beam (2) is removed.

6. A method for removing an external wall hanging flower basket I-beam as claimed in claim 1, characterized in that: In S5, a rod is used to extend the hanging distance of the two ropes.

7. A method for removing an external wall hanging basket I-beam as claimed in claim 1, characterized in that: The two ropes are made of nylon chemical fiber rope with a diameter of 20mm.

8. A method for removing an external wall hanging flower basket I-beam as claimed in claim 1, characterized in that: The two ropes corresponding to the basket I-beam (2) at the gable position are introduced into the room with a reserved length.

9. A method for removing an external wall hanging flower basket I-beam as claimed in claim 1, characterized in that: The lifting device corresponding to the lifting hook (7) is a tower crane.

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