High-altitude dismantling method for concrete chimney

Abstract

The invention relates to the technical field of chimney dismantling construction, in particular to a concrete chimney high-altitude dismantling method which comprises the steps that a plurality of anchoring parts are fixed to a chimney according to preset positions; a plurality of slideways are arranged in the circumferential direction of the chimney, and a triangular support is installed on the uppermost slideway steel pipe; an operation platform is mounted on the triangular support; wall dismantling seams are chiseled in the operation platform in the circumferential direction of the chimney every 3-5 m, force towards the interior of the chimney is applied to concrete slabs between the wall dismantling seams, the connecting positions of the bottoms of the concrete slabs and the lower-layer chimney are removed, and the concrete slabs fall into the chimney; the operation platform is moved towards the next layer, dismantling operation is carried out, and the operation is repeated until dismantling operation is completely completed; the annular aerial work platform is innovatively introduced, workers carry out dismantling operation layer by layer from top to bottom on the platform and are not limited by adjacent buildings, and meanwhile flying stones and large-area flying dust are effectively avoided; and the structure integrity of the lower part of the chimney can be ensured, and accurate local dismantling is realized.

Description

Technical Field

[0001] The invention relates to the technical field of chimney demolition construction, in particular to a method for high-altitude demolition of a concrete chimney. Background Art

[0002] In metallurgical construction projects, the demolition of concrete chimneys has traditionally relied on directional blasting technology, but this method strictly requires that the surrounding environment be open, the site space must at least match the height of the chimney, and the width on both sides of the collapse centerline must be more than three times the outer diameter of the bottom of the chimney or water tower; before blasting, the site must be carefully prepared and comprehensive safety protection measures must be implemented to prevent potential hazards such as flying rocks; therefore, the blasting demolition method in the existing technology is not only difficult to ensure the integrity of the overall structure of the chimney, and cannot achieve partial demolition, but is also accompanied by high risks and high costs; therefore, it is necessary to develop a concrete chimney demolition method that can achieve partial demolition, has low danger, has little limitation on the surrounding site, and will not affect the surrounding environment. Summary of the invention

[0003] In view of the deficiencies in the prior art, the object of the present invention is to provide a method for high-altitude demolition of a concrete chimney which can achieve partial demolition, has low danger and has little limitation on the surrounding site.

[0004] The technical solution adopted by the present invention to solve its technical problem is: A method for high-altitude demolition of a concrete chimney, the specific steps are as follows: S1, Anchor installation: The personnel first install a hanging basket on the top of the concrete chimney, then hang a vertical line on the basket to the outer wall of the chimney, draw the pre-installation position of the anchor from bottom to top, and fix several anchors on the chimney according to the preset position; S2, platform moving slideway erection: several slideways are arranged along the chimney circumferentially, and the length direction thereof is arranged along the height direction of the chimney. When installing the slideways, they are erected layer by layer from bottom to top. First, pads are placed on the ground, and the first layer of slideways is placed on the pads. Then, pipe clamps are used to clamp the slideways to the corresponding anchors. The second layer and above slideways are first connected and fixed to the lower layer of slideways, and then pipe clamps are used to clamp the corresponding anchors. A ladder is also installed on the outer wall of the chimney from bottom to top. The ladder is arranged along the height direction of the chimney and is fixed to the outer wall of the chimney through anchors and pipe clamps. S3, installation of triangular support: The triangular support is installed on the uppermost slideway, and the upper and lower ends are clamped with pipe clamps; S4, installation of operating platform: install the operating platform on the triangular support, and set a handrail on the operating platform; the operating platform is set in a ring shape, and the size is adapted to the diameter of the chimney; S5, wall chiseling: personnel stand on the operating platform and chisel a wall demolition joint every 3-5m along the chimney circumference. The wall demolition joint is set along the height of the chimney. The chiseling is done from top to bottom until it is 150-300mm away from the operating platform. Force is applied to the inside of the chimney on the concrete slab between the wall demolition joints to remove the connection between the bottom of the concrete slab and the lower chimney, so that the concrete slab falls into the chimney until all the concrete slabs between the wall demolition joints on the upper side of the operating platform are removed. S6, moving the operating platform: hang the electric hoist symmetrically on the upper edge of the chimney, connect the hook of the electric hoist with the operating platform, and lift the operating platform through the electric hoist; then hang a hanging basket downward from the operating platform, and the personnel stand in the hanging basket, remove the triangular support and move it downward, and fix it on the next section of the slideway; then use the electric hoist to slowly lower the platform onto the triangular support to carry out the demolition work of the next section of the chimney side wall; S7: Repeat S5 and S6 until all the chimneys to be demolished are demolished.

[0005] Preferably, a further technical solution of the present invention is: Preferably, the anchor comprises a support rod, each end of the support rod is provided with a connecting plate, the connecting plate is arranged perpendicular to the support rod, an expansion bolt is arranged perpendicular to the connecting plate on one connecting plate, and a U-shaped pipe clamp is arranged on the other connecting plate for connecting the slide; in step S1, when drawing the pre-installation position of the anchor from bottom to top on the outer wall of the chimney, it is necessary to draw the expansion bolt installation position of each anchor, and when installing the anchor, it is necessary to drill holes on the drawn expansion bolt installation positions, and then install the expansion bolts through the drilled holes, and tighten the gasket nuts to fix the anchors.

[0006] Preferably, the slide is made of several sections of steel pipes that are plugged into each other. A sleeve that matches the size of the steel pipe is provided at one end of the steel pipe to facilitate the plugging of the several sections of steel pipes into each other. The slide is connected and fixed to the anchor by a U-shaped pipe clamp.

[0007] Preferably, the triangular support includes vertical poles, horizontal poles and diagonal poles, and the vertical poles, horizontal poles and diagonal poles are all made of channel steel. The groove surface of the channel steel of the vertical pole is buckled on the slideway steel pipe. A pipe clamp is respectively provided at the upper and lower ends of the vertical pole, and is fixed to the slideway steel pipe through the pipe clamp.

[0008] Preferably, the operating platform comprises a plurality of platform units connected in a ring shape, each platform unit comprises a support frame and a platform plate arranged on the support frame, the platform plate is an arc-shaped structure, one end is a large head end, and the other end is a small head end, and the large head end is provided with a slot for socketing the small head end, and the platform plates of adjacent platform units are socket-connected through the small head end and the large head end with the slot.

[0009] Preferably, a plurality of pin holes are provided on both sides of the large end and the small end of the platform plate. After the small end of the platform plate is inserted into the large end of the adjacent platform plate, the pin shaft is inserted into the pin holes of the two platform plates to fix the two adjacent platform plates.

[0010] Preferably, a plug rod is welded every 1m on the outer ring side of each platform plate to receive the railing.

[0011] Preferably, each platform plate is provided with a flip-up manhole.

[0012] Compared with the prior art, the present invention adopting the above technical solution has the following outstanding features: The present invention innovatively introduces a circular aerial work platform, on which workers carry out demolition work layer by layer from top to bottom, without being restricted by adjacent buildings, significantly reducing the demand for ground space, while effectively avoiding the generation of flying rocks and large-scale dust; more importantly, it can ensure the structural integrity of the lower part of the chimney and achieve precise local demolition.

[0013] The starting point of the patent for this invention focuses on the demolition of concrete chimneys, especially for outdoor high-altitude work scenes. It clearly stipulates the demolition order from top to bottom and is applicable to the specific working environment of high-altitude partial chimney demolition. In addition, the application scope of this patent has been widely expanded to cover the full range of treatment of tall buildings such as water towers and concrete chimneys, including but not limited to top-down demolition, rust removal, spraying, painting and surface decoration. The uniqueness of this method is that its working surface can not only be flexibly set on the outside of the chimney, but also adjusted to the inside of the chimney according to actual needs, realizing all-round and multi-angle efficient operations.

[0014] A method of demolishing chimneys with a slide rail platform involves workers dismantling the chimneys in sections on a circular operating platform and using an electric hoist to quickly move the platform. This method effectively overcomes the difficulties and widespread impacts of chimney demolition, replaces blasting operations, reduces dust pollution, reduces construction costs, and meets the strategic requirements of green and sustainable development. In addition, this operation method allows parallel construction with adjacent buildings, ensuring construction safety and progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a concrete chimney during high-altitude demolition in an embodiment of the present invention; Figure 2 is a schematic diagram of the structure of a mobile operating platform in an embodiment of the present invention; Figure 3 2 is a schematic diagram of the structure of the present invention when chiseling and removing the wall seam; Figure 4 is a schematic structural diagram of an anchor member in an embodiment of the present invention; Figure 5 It is a structural schematic diagram of a platform board connected to a platform board in an embodiment of the present invention; Figure 6 is another structural schematic diagram of a platform board connected to another platform board in an embodiment of the present invention; Figure 7 Schematic diagram of the structure of the ladder in the embodiment of the present invention.

[0016] Explanation of the reference numerals in the accompanying drawings: 1. Chimney; 2. Operating platform; 201. Platform board; 2011. Big end; 2012. Small end; 3. Triangular support installation; 4. Slide; 5. Anchor; 501. Support rod; 502. Connecting plate; 503. Expansion bolt; 504. U-shaped pipe clamp; 6. Handrail; 7. Electric hoist; 8. Wire rope; 9. Wall demolition; 10. Flip manhole; 11. Pin; 12. Ladder. DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with specific embodiments, the purpose of which is only to provide a better understanding of the content of the present invention. Therefore, the examples given do not limit the protection scope of the present invention.

[0018] like Figures 1 to 7 As shown, this embodiment provides a method for high-altitude demolition of a concrete chimney, and the specific steps are as follows: S1, installation of anchors 5: personnel first install a hanging basket on the top of the concrete chimney 1, then hang a vertical line on the hanging basket to the outer wall of the chimney 1, draw the pre-installation position of the anchors 5 from bottom to top, and then fix several anchors 5 on the chimney 1 according to the preset positions.

[0019] Specifically, Figure 4 As shown, the anchor 5 includes a support rod 501, and a connecting plate 502 is respectively arranged at both ends of the support rod 501, and the connecting plate 502 is arranged perpendicular to the support rod 501. An expansion bolt 503 is arranged on one connecting plate 502 perpendicular to the connecting plate 502, and a U-shaped pipe clamp 504 is arranged on the other connecting plate 502 for connecting the slide 4; in step S1, when drawing the pre-installation position of the anchor 5, it is necessary to draw the expansion bolt 503 installation position of each anchor 5, and when installing the anchor 5, it is necessary to drill holes on the drawn expansion bolt 503 installation positions, and then install the expansion bolts 503 through the drilled holes, and tighten the gasket nuts to fix the anchor 5.

[0020] S2, erection of platform moving slideway 4: several slideways 4 are arranged along the chimney 1 in a circumferential direction, and the length direction thereof is arranged along the height direction of the chimney 1. When installing the slideways 4, they are erected layer by layer from bottom to top. First, a cushion block is placed on the ground, and the first layer of slideways 4 is placed on the cushion block. Then, the slideways 4 are clamped on the corresponding anchors 5 using pipe clamps. The second layer and above slideways 4 are first connected and fixed to the lower layer of slideways 4, and then clamped with the corresponding anchors 5 using pipe clamps. A ladder 12 is also installed on the outer wall of the chimney 1 from bottom to top. The ladder 12 is arranged along the height direction of the chimney 1, and the ladder 12 is fixed to the outer wall of the chimney 1 by anchors 5 and pipe clamps.

[0021] The slideway 4 is made of several sections of steel pipes plugged into each other, with a length of 2m. A sleeve matching the size of the steel pipe is provided at one end of the steel pipe to facilitate the plugging of several sections of steel pipes into each other. The steel pipe of the slideway 4 is connected and fixed to the anchor 5 through a U-shaped pipe clamp 504. Specifically, the sleeve is a short pipe with a larger diameter than the welding diameter of the end of the steel pipe, which is used for the socket connection between the steel pipes.

[0022] S3, triangular support installation 3: the triangular support is installed 3 to the uppermost slide 4, and the upper and lower ends are clamped with pipe clamps; the triangular support includes a vertical pole, a horizontal pole and an oblique pole, and the vertical pole, the horizontal pole and the oblique pole are all made of channel steel, and the channel steel groove surface of the vertical pole is buckled on the steel pipe of the slide 4, so that when the subsequent operating platform 2 is shifted, the vertical pole moves along the steel pipe of the slide 4; a pipe clamp is set at each of the upper and lower ends of the vertical pole, and is fixed to the steel pipe of the slide 4 through the pipe clamp; the horizontal pole and the oblique pole are welded to one side of the channel steel plane of the vertical pole to ensure that the welding is firm.

[0023] S4, installation of the operating platform 2: the operating platform 2 is installed on the triangular support, and a railing 6 is provided on the operating platform 2; the operating platform 2 is arranged in a ring shape, and the size is adapted to the diameter of the chimney 1; the railing 6 is made in a standard style, and a skirting board is welded at the bottom.

[0024] like Figure 5 , Figure 6 As shown, the operating platform 2 is formed by a number of platform units connected in a circular shape, each platform unit includes a support frame and a platform plate 201 arranged on the support frame, the platform plate 201 is an arc structure, one end is a large head end 2011, and the other end is a small head end 2012, the large head end 2011 is provided with a slot for socketing the small head end 2012, and the platform plates 201 of adjacent platform units are connected by the small head end 2012 and the large head end 2011 with the slot; after the circular arrangement, the ends are connected to form a complete circular construction platform; wherein, the support frame is made of channel steel welding, and the platform plate 201 is made of patterned plate.

[0025] A plurality of pin holes are arranged on both sides of the big end 2011 and the small end 2012 of the platform plate 201. In this embodiment, three pin holes are arranged at intervals on both sides of the big end 2011 and the small end 2012. After the small end 2012 of the platform plate 201 is inserted into the big end 2011 of the adjacent platform plate 201, the pin shaft 11 is inserted into the pin holes of the two platform plates 201 to fix the two adjacent platform plates 201; by adjusting the length of the small end 2012 inserted into the big end 2011 slot between the adjacent platform plates 201, the diameter of the inner ring of the annular construction platform after the annular arrangement can be adjusted, so as to be applicable to chimneys 1 of different diameters, thereby improving the applicability and facilitating the turnover of the platform plate 201.

[0026] A plug is welded every 1m on the outer ring side of each platform plate 201 to receive the railing 6.

[0027] S5, wall chiseling: the personnel stand on the operating platform 2, and then chisel a wall demolition seam 9 at intervals of 3-5m along the chimney 1. The wall demolition seam 9 is arranged along the height of the chimney 1. The chiseling is performed from top to bottom until it is 150-300mm away from the operating platform 2; a force is applied to the inside of the chimney 1 on the concrete slab between the wall demolition seams 9, and the connection position between the bottom of the concrete slab and the lower chimney 1 is removed, so that the concrete slab falls into the inside of the chimney 1, until all the concrete slabs between the wall demolition seams 9 on the upper side of the operating platform 2 are removed; S6, moving the operating platform 2: symmetrically hang the electric hoist 7 on the upper edge of the chimney 1 (that is, the connection position between the bottom of the concrete slab and the lower chimney 1 in step S5), use the hook and wire rope 8 to hook on the operating platform 2, and lift the operating platform 2 through the electric hoist 7; then hang a hanging basket downward on the operating platform 2, and the personnel stand in the hanging basket, remove the triangular support and move it down 2 meters, and fix it on the next section of the slide 4, wherein the triangular support moves down along the slide 4; then, through the electric hoist 7, slowly lower the platform to the triangular support, and carry out the demolition work of the side wall of the next section of the chimney 1; wherein, in order to facilitate the hanging of the hanging basket, each platform plate 201 is provided with a flip manhole 10.

[0028] In this embodiment, when the operating platform 2 is moved, four electric hoists 7 are used, and the four electric hoists 7 are symmetrically hung on the upper edge of the chimney 1 to lift the operating platform 2.

[0029] S7: Repeat S5 and S6 until all the chimneys 1 to be demolished are demolished.

[0030] The present invention innovatively introduces a circular aerial work platform to realize a circular wall-type demolition operation. Workers carry out demolition operations layer by layer from top to bottom on this platform without being restricted by adjacent buildings, which significantly reduces the demand for ground site space and effectively avoids the generation of flying rocks and large-scale dust. More importantly, it can ensure the structural integrity of the lower part of the chimney 1 and realize precise partial demolition.

[0031] The starting point of the patent of this invention focuses on the demolition of concrete chimney 1, especially for outdoor high-altitude work scenes, clearly stipulates the demolition order from top to bottom, and is applicable to the specific working environment of the demolition of the high-altitude chimney 1. In addition, the application scope of this patent has been widely expanded, covering the full range of treatment of tall buildings such as water towers and concrete chimneys, including but not limited to top-down demolition, rust removal, spraying, painting and surface decoration. The uniqueness of this method is that its working surface can not only be flexibly set on the outside of the chimney 1, but also can be adjusted to the inside of the chimney 1 according to actual needs, so as to achieve all-round and multi-angle efficient operations.

[0032] A method for demolishing a chimney 1 using a slide rail platform involves workers demolishing the chimney 1 in sections on a ring-shaped operating platform 2, and using an electric hoist 7 to quickly move the platform. The method effectively overcomes the difficulties and widespread impacts of the chimney 1 demolition process, replaces blasting operations, reduces dust pollution, reduces construction costs, and meets the strategic requirements of green and sustainable development. In addition, the operation method allows parallel construction with adjacent buildings, ensuring construction safety and progress.

[0033] The above description is only the preferred embodiment of the present invention, and does not limit the scope of rights of the present invention. All equivalent changes made by using the contents of the present invention specification and its drawings are included in the scope of rights of the present invention.

Claims

1. A method for dismantling a concrete chimney at high altitude, characterized in that: The specific steps are as follows: S1, Anchor installation: The personnel first install a hanging basket on the top of the concrete chimney, then hang a vertical line on the basket to the outer wall of the chimney, draw the pre-installation position of the anchor from bottom to top, and fix several anchors on the chimney according to the preset position; S2, platform moving slideway erection: several slideways are arranged along the chimney circumferentially, and the length direction thereof is arranged along the height direction of the chimney. When installing the slideways, they are erected layer by layer from bottom to top. First, pads are placed on the ground, and the first layer of slideways is placed on the pads. Then, pipe clamps are used to clamp the slideways to the corresponding anchors. The second layer and above slideways are first connected and fixed to the lower layer of slideways, and then pipe clamps are used to clamp the corresponding anchors. A ladder is also installed on the outer wall of the chimney from bottom to top. The ladder is arranged along the height direction of the chimney and is fixed to the outer wall of the chimney through anchors and pipe clamps. S3, installation of triangular support: install the triangular support on the uppermost slideway and clamp it with pipe clamps at the upper and lower ends; S4, installation of operating platform: install the operating platform on the triangular support, and set a handrail on the operating platform; the operating platform is set in a ring shape, and the size is adapted to the diameter of the chimney; S5, wall chiseling: personnel stand on the operating platform and chisel a wall demolition joint every 3-5m along the chimney circumference. The wall demolition joint is set along the height of the chimney. The chiseling is done from top to bottom until it is 150-300mm away from the operating platform. Force is applied to the inside of the chimney on the concrete slab between the wall demolition joints to remove the connection between the bottom of the concrete slab and the lower chimney, so that the concrete slab falls into the chimney until all the concrete slabs between the wall demolition joints on the upper side of the operating platform are removed. S6, moving the operating platform: hang the electric hoist symmetrically on the upper edge of the chimney, connect the hook of the electric hoist with the operating platform, and lift the operating platform through the electric hoist; then hang a hanging basket downward from the operating platform, and the personnel stand in the hanging basket, remove the triangular support and move it downward, and fix it on the next section of the slideway; then use the electric hoist to slowly lower the platform onto the triangular support to carry out the demolition work of the next section of the chimney side wall; S7: Repeat S5 and S6 until all the chimneys to be demolished are demolished.

2. The method for dismantling a concrete chimney at high altitude according to claim 1, characterized in that: The anchor comprises a support rod, each end of which is provided with a connecting plate, the connecting plate being arranged perpendicular to the support rod, an expansion bolt being arranged perpendicular to the connecting plate on one connecting plate, and a U-shaped pipe clamp being arranged on the other connecting plate for connecting the slideway; in step S1, when drawing the pre-installation position of the anchor from bottom to top on the outer wall of the chimney, it is necessary to draw the expansion bolt installation position of each anchor, and when installing the anchor, it is necessary to drill holes on the drawn expansion bolt installation positions, and then install the expansion bolts through the drilled holes, and tighten the gasket nuts to fix the anchors.

3. The method for dismantling a concrete chimney at high altitude according to claim 2, characterized in that: The slide is made of several sections of steel pipes that are plugged into each other. A sleeve that matches the size of the steel pipe is provided at one end of the steel pipe to facilitate the plugging of several sections of steel pipes into each other. The slide is connected and fixed with an anchor by a U-shaped pipe clamp.

4. The method for dismantling a concrete chimney at high altitude according to claim 3, characterized in that: The triangular support includes vertical poles, horizontal poles and diagonal poles. The vertical poles, horizontal poles and diagonal poles are all made of channel steel. The groove surface of the channel steel of the vertical pole is buckled on the slideway steel pipe. A pipe clamp is set at the upper and lower ends of the vertical pole, and fixed to the slideway steel pipe through the pipe clamp.

5. The method for dismantling a concrete chimney at high altitude according to claim 1, characterized in that: The operating platform is composed of several platform units connected in a ring shape. Each platform unit includes a support frame and a platform plate arranged on the support frame. The platform plate is an arc-shaped structure, one end of which is a large head end and the other end is a small head end. The large head end is provided with a slot for socketing the small head end. The platform plates of adjacent platform units are socket-connected through the small head end and the large head end with the slot.

6. The method for dismantling a concrete chimney at high altitude according to claim 5, characterized in that: A plurality of pin holes are arranged on both sides of the large end and the small end of the platform plate. After the small end of the platform plate is inserted into the large end of the adjacent platform plate, the pin shaft is inserted into the pin holes of the two platform plates to fix the two adjacent platform plates.

7. The method for dismantling a concrete chimney at high altitude according to claim 5, characterized in that: A plug rod is welded every 1m on the outer ring side of each platform plate to accommodate the railing.

8. The method for dismantling a concrete chimney at high altitude according to claim 5, characterized in that: Each platform plate is provided with a flip manhole.

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