Method for high-altitude demolition of a concrete chimney

Abstract

The present application relates to chimney demolition construction technical field, specifically said is a kind of concrete chimney high-altitude demolition method, including, several anchoring members are fixed in chimney according to preset position;Slide is arranged in several slide along chimney circumferentially, and triangular support is installed on the uppermost layer slide pipe;Triangular support is installed on operating platform;In operating platform, every interval 3-5m along chimney circumferentially chisels a wall joint, force is applied to chimney in the concrete slab between wall joint, and the position of concrete slab bottom and lower chimney connection is removed, so that concrete slab falls to chimney interior;Operating platform is moved to next layer, and demolition operation is carried out, and repeat until demolition operation is all completed;The present application innovatively introduces annular high-altitude operation platform, worker is from top to bottom layer by layer on the platform and carries out demolition operation, is not restricted by adjacent building, while effectively avoiding the generation of flying stone and large area dust raising;It can also ensure the structure integrity of chimney lower part, realizes accurate local demolition.

Description

TECHNICAL FIELD

[0001] The present application relates to the chimney demolition construction technical field, specifically to a concrete chimney high-altitude demolition method. BACKGROUND

[0002] In metallurgical construction engineering, the demolition of concrete chimneys traditionally relies on directional blasting technology, but this method requires a wide open surrounding environment, and the site space needs to match at least the height of the chimney, and the width on both sides of the collapse center line needs to reach more than three times the outer diameter of the chimney or water tower bottom; before blasting, the site needs to be carefully prepared and comprehensive safety protection measures need to be implemented to prevent potential hazards such as flying stones; therefore, the existing blasting demolition method is not only difficult to ensure the overall structural integrity of the chimney and cannot achieve local demolition, but also has high risk and high cost; therefore, it is necessary to develop a concrete chimney demolition method that can achieve local demolition, has low risk, and has small limitations on the surrounding site. SUMMARY

[0003] In view of the deficiencies of the prior art, the purpose of the present application is to provide a concrete chimney high-altitude demolition method that can achieve local demolition, has low risk, and has small limitations on the surrounding site.

[0004] The technical solution adopted by the present application to solve its technical problems is:

[0005] A concrete chimney high-altitude demolition method, the specific steps are as follows:

[0006] S1, anchor installation: personnel first install a basket at the top of the concrete chimney, then hang a plumb line on the outer wall of the chimney in the basket, draw the pre-installation position of the anchor from bottom to top, and fix a plurality of anchors on the chimney according to the pre-set position;

[0007] S2, platform moving slide erection: a plurality of slides are arranged along the circumference of the chimney, and the long direction is arranged along the height of the chimney; the slides are installed layer by layer from bottom to top; first, place the cushion on the ground, then place the first layer of slide on the cushion, then use the pipe clamp to clamp the slide on the corresponding anchor, and then use the pipe clamp to clamp the second layer and above slides on the corresponding anchor; a ladder is also installed on the outer wall of the chimney from bottom to top, the ladder is arranged along the height of the chimney, and the ladder is fixed to the outer wall of the chimney through the anchor and the pipe clamp;

[0008] S3, triangular support installation: the triangular support is installed on the uppermost layer of slide, and the pipe clamp is used to clamp the upper and lower ends;

[0009] S4, operation platform installation: install an operation platform on the triangular support, and the operation platform is provided with a railing; the operation platform is arranged in a ring shape, and the size is matched with the diameter of the chimney;

[0010] S5, wall body chiseling: personnel stand on the operation platform, then chisel a wall removal seam every 3-5m along the circumference of the chimney, the wall removal seam is arranged along the chimney height, chiseling from top to bottom, stop 150-300mm away from the operation platform; exert force on the concrete slab between the wall removal seam and the wall removal seam to the inside of the chimney, remove the bottom of the concrete slab and the connection position of the lower chimney, so that the concrete slab falls into the inside of the chimney, until the concrete slab between the upper wall removal seam and the wall removal seam on the operation platform is removed;

[0011] S6, operation platform moving: the electric hoist is symmetrically hung on the chimney upper side, the hook of the electric hoist is connected with the operation platform, the operation platform is lifted by the electric hoist; then the basket is hung downward on the operation platform, the personnel stand in the basket, the triangular support is removed and moved downward, and is fixed on the next section of the slide; then the platform is slowly lowered to the triangular support by the electric hoist, and the next section of the chimney side wall is removed.

[0012] S7: repeat S5 and S6 until all the chimney to be removed is removed.

[0013] As preferred, the further technical scheme of the present application is:

[0014] Preferably, the anchor includes a support rod, each end of the support rod is provided with a connecting plate, the connecting plate is perpendicular to the support rod, an expansion bolt is arranged on one connecting plate perpendicular to the connecting plate, and a U-shaped pipe clamp is arranged on the other connecting plate to connect the slide; in step S1, when the pre-installation position of the anchor on the outer wall of the chimney is drawn from bottom to top, the expansion bolt installation position of each anchor needs to be drawn, and when the anchor is installed, a hole is drilled on the drawn expansion bolt installation position, then the expansion bolt is installed through the drilled hole, and the anchor is fixed by tightening the gasket nut.

[0015] Preferably, the slide is made of a plurality of steel pipes inserted into each other, one end of the steel pipe is provided with a sleeve matched with the size of the steel pipe, so as to facilitate the insertion of the plurality of steel pipes into each other, and the slide is connected and fixed with the anchor through the U-shaped pipe clamp.

[0016] Preferably, the triangular support includes a vertical rod, a horizontal rod and an inclined rod, the vertical rod, the horizontal rod and the inclined rod are all made of channel steel, the channel steel groove of the vertical rod is buckled on the slide steel pipe, and a pipe clamp is arranged at each of the upper and lower ends of the vertical rod and fixed on the slide steel pipe through the pipe clamp.

[0017] Preferably, the operation platform includes a plurality of 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 in an arc shape, one end is a large end, and the other end is a small end, the large end is provided with a slot for receiving the small end, and the platform plates of adjacent platform units are connected through the small end and the large end with the slot.

[0018] Preferably, the large end and the small end of the platform plate are provided with a plurality of pin holes, and the small end of the platform plate is inserted into the large end of the adjacent platform plate, and then the pin shaft is inserted into the pin holes of the two platform plates to fix the two adjacent platform plates.

[0019] Preferably, an insertion rod is welded every 1m on the outer ring side of each platform plate to support the rail.

[0020] Preferably, a flip manhole is arranged on each platform plate.

[0021] The technical scheme of the present application has the following prominent features compared with the prior art:

[0022] The present application innovatively introduces a ring-shaped aerial work platform, and workers perform the demolition work layer by layer from top to bottom on the platform, which is not restricted by adjacent buildings, significantly reduces the demand for ground space, effectively avoids the generation of flying stones and large-area dust, and more importantly, ensures the structural integrity of the lower part of the chimney and realizes precise local demolition.

[0023] The present application focuses on the demolition of concrete chimneys, especially for outdoor aerial work scenes, and clearly specifies the top-down demolition sequence, which is applicable to the specific working environment of high-altitude chimney demolition. In addition, the application scope of the present patent is widely expanded to cover the comprehensive treatment of high-rise buildings such as water towers and concrete chimneys, including but not limited to top-down demolition, rust removal, spraying, painting, and surface decoration. The unique feature of this method is that the working surface can be flexibly set on the outside of the chimney, and can also be adjusted to the inside of the chimney according to actual needs, achieving efficient work in all directions and at multiple angles.

[0024] A method for demolishing a chimney using a sliding rail platform involves workers performing segmented demolition of the chimney on a ring-shaped operation platform, and using an electric hoist to achieve rapid movement of the platform. This method effectively overcomes the difficulties and widespread impact 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 work method allows parallel construction with adjacent buildings, ensuring construction safety and progress. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the overall structure schematic diagram of the concrete chimney aerial demolition in the embodiment of the present application;

[0026] Figure 2 is the structure schematic diagram of the moving operation platform in the embodiment of the present application;

[0027] Figure 3 is the structure schematic diagram of the chiseling and demolishing wall joints in the embodiment of the present application;

[0028] Figure 4 This is a schematic diagram of the structure of the anchor in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of a structure when platform boards are connected in an embodiment of the present invention;

[0030] Figure 6 This is another structural schematic diagram of the connection between platform boards in an embodiment of the present invention;

[0031] Figure 7 This is a schematic diagram of the ladder structure in an embodiment of the present invention.

[0032] Explanation of reference numerals in the attached drawings: 1. Chimney; 2. Operating platform; 201. Platform plate; 2011. Large end; 2012. Small end; 3. Triangular support installation; 4. Slide rail; 5. Anchor; 501. Support rod; 502. Connecting plate; 503. Expansion bolt; 504. U-shaped pipe clamp; 6. Railing; 7. Electric hoist; 8. Wire rope; 9. Wall demolition joint; 10. Flip-top manhole; 11. Pin; 12. Ladder. Detailed Implementation

[0033] The present invention will be further illustrated below with reference to specific embodiments. The purpose of this illustration is solely to provide a better understanding of the invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0034] like Figures 1 to 7 As shown in the figure, this embodiment provides a method for high-altitude demolition of a concrete chimney, and the specific steps are as follows:

[0035] S1, Anchor 5 installation: Personnel first install a suspended basket on the top of the concrete chimney 1, then hang a plumb line on the suspended basket to the outer wall of the chimney 1, and draw the pre-installation position of the anchor 5 from bottom to top. Then, fix several anchors 5 to the chimney 1 according to the preset position.

[0036] Specifically, such as Figure 4 As shown, the anchor 5 includes a support rod 501, with a connecting plate 502 at each end of the support rod 501. The connecting plate 502 is perpendicular to the support rod 501. An expansion bolt 503 is provided perpendicularly to one connecting plate 502, and a U-shaped pipe clamp 504 is provided on the other connecting plate 502 for connecting the slide rail 4. In step S1, when drawing the pre-installation position of the anchor 5, it is necessary to draw the installation position of the expansion bolt 503 for each anchor 5. When installing the anchor 5, holes need to be drilled at the drawn installation positions of the expansion bolt 503, and then the expansion bolt 503 is installed through the drilled holes. The washer nut is then tightened to fix the anchor 5.

[0037] S2, Platform moving slide 4 construction: Several slides 4 are set around the chimney 1 in a circumferential direction, and their length is set along the height of the chimney 1. When installing the slides 4, they are set up layer by layer from bottom to top. First, pad blocks are placed on the ground, the first layer of slides 4 is placed on the pad blocks, and then pipe clamps are used to fix the slides 4 to the corresponding anchors 5. The second and above slides 4 are first connected and fixed to the lower slides 4, and then pipe clamps are used to tighten them to the corresponding anchors 5. On the outer wall of the chimney 1, ladders 12 are also installed from bottom to top. The ladders 12 are set along the height of the chimney 1 and are fixed to the outer wall of the chimney 1 by anchors 5 and pipe clamps.

[0038] The slide rail 4 is made of several interlocking steel pipe sections, each 2m long. One end of each steel pipe has a sleeve of the same size to facilitate the interlocking of the pipe sections. The steel pipes of slide rail 4 are connected and fixed to anchors 5 via U-shaped pipe clamps 504. Specifically, the sleeve is a short pipe with a diameter one size larger than the welded end of the steel pipe, used for the socket connection between the steel pipe sections.

[0039] S3, Triangular Support Installation 3: The triangular support 3 is installed on the uppermost slide rail 4, and the upper and lower ends are secured with pipe clamps; the triangular support includes an upright, a horizontal bar, and a diagonal bar, all of which are made of channel steel. The grooved surface of the channel steel of the upright is fastened to the steel pipe of the slide rail 4 so that the upright can move along the steel pipe of the slide rail 4 when the operating platform 2 is moved later; a pipe clamp is installed at each of the upper and lower ends of the upright, and the upright is fixed to the steel pipe of the slide rail 4 by the pipe clamp; the horizontal bar and the diagonal bar are welded to one side of the channel steel plane of the upright to ensure a firm weld.

[0040] S4, Installation of operating platform 2: Install operating platform 2 on the triangular support. The operating platform 2 is equipped with railing 6. The operating platform 2 is arranged in a ring shape and its size is adapted to the diameter of chimney 1. The railing 6 is made in a standard style and has a kick plate welded to the bottom.

[0041] like Figure 5 , Figure 6 As shown, the operating platform 2 is composed of several platform units connected in a ring shape. Each platform unit includes a support frame and a platform plate 201 mounted on the support frame. The platform plate 201 has an arc-shaped structure, with one end being a large end 2011 and the other end being a small end 2012. The large end 2011 is provided with a slot for receiving the small end 2012. The platform plates 201 of adjacent platform units are connected by the small end 2012 and the large end 2011 with the slot. After being arranged in a ring, they are connected end to end to form a complete ring construction platform. The support frame is made of welded channel steel, and the platform plate 201 is made of checkered plate.

[0042] Both sides of the large end 2011 and the small end 2012 of the platform plate 201 are provided with several pin holes. In this embodiment, three pin holes are provided at intervals on each side of the large end 2011 and the small end 2012. After the small end 2012 of the platform plate 201 is inserted into the large end 2011 of the adjacent platform plate 201, the pin shaft 11 is then 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 slot of the large end 2011 between adjacent platform plates 201, the diameter of the inner ring of the annular construction platform after the annular arrangement can be adjusted, thus making it suitable for chimneys 1 of different diameters, improving applicability, and facilitating the reuse of the platform plate 201.

[0043] Every 1m along the outer ring side of each platform slab 201, a support rod is welded to support the railing 6.

[0044] S5, Wall Removal: Personnel stand on the operating platform 2 and then chisel a wall removal joint 9 every 3-5m along the circumference of the chimney 1. The wall removal joint 9 is set along the height of the chimney 1. Chisel from top to bottom until it stops 150-300mm away from the operating platform 2. Apply force into the interior of the chimney 1 to the concrete slab between the wall removal joints 9 and 9, remove the bottom of the concrete slab from the connection position with the lower chimney 1, so that the concrete slab falls into the interior of the chimney 1, until all the concrete slabs between the wall removal joints 9 and 9 on the upper side of the operating platform 2 are removed.

[0045] S6, Moving the operating platform 2: The electric hoist 7 is symmetrically suspended 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), and hooked onto the operating platform 2 using hooks and wire ropes 8. The operating platform 2 is then lifted by the electric hoist 7. Then, a suspended basket is suspended downwards from the operating platform 2, and personnel stand inside the basket. The triangular support is removed and lowered by 2 meters, and fixed on the next section of the slide rail 4. The triangular support moves down along the slide rail 4 as it moves downwards. Then, the platform is slowly lowered onto the triangular support by the electric hoist 7 to carry out the demolition work of the next section of the chimney 1 side wall. To facilitate the suspension of the basket, each platform plate 201 is provided with a flip-up manhole 10.

[0046] In this embodiment, when the operating platform 2 moves, four electric hoists are used to symmetrically suspend the four electric hoists on the upper edge of the chimney 1, so that the operating platform 2 is lifted.

[0047] S7: Repeat S5 and S6 until all parts of the chimney to be demolished are removed.

[0048] This invention innovatively introduces a circular aerial work platform, enabling circular wall-mounted demolition operations. Workers can carry out demolition work layer by layer from top to bottom on this platform, without being restricted by adjacent buildings, significantly reducing the need for ground space, and 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 1, enabling precise local demolition.

[0049] This invention focuses on the demolition of concrete chimneys 1, particularly for outdoor high-altitude operations. It clearly defines the top-to-bottom demolition sequence and is applicable to the specific working environment of demolishing high-altitude sections of chimneys 1. Furthermore, the application scope of this patent is broadly expanded, covering the comprehensive treatment of tall structures such as cooling towers and concrete chimneys, including but not limited to top-to-bottom demolition, rust removal, spraying, painting, and surface decoration. The unique feature of this method is that its working surface can be flexibly set not only on the outside of chimney 1 but also adjusted to the inside of chimney 1 according to actual needs, achieving efficient operation from all directions and multiple angles.

[0050] A method for dismantling a chimney 1 using a sliding rail platform involves workers dismantling the chimney 1 in sections on a circular operating platform 2, and using an electric hoist 7 to achieve rapid platform movement. This method effectively overcomes the difficulties and widespread impacts of chimney 1 dismantling, replaces blasting operations, reduces dust pollution, lowers construction costs, and aligns with the strategic requirements of green and sustainable development. Furthermore, this method allows for parallel construction with adjacent buildings, ensuring construction safety and progress.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the invention. All equivalent changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. A method for high-altitude demolition of a concrete chimney, characterized in that, The specific steps are as follows: S1, Anchor installation: Personnel first install a basket on the top of the concrete chimney, then hang a plumb 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. The anchor includes a support rod, with a connecting plate at each end of the support rod. The connecting plate is perpendicular to the support rod. An expansion bolt is installed perpendicular to the connecting plate on one connecting plate, and a U-shaped pipe clamp is installed on the other connecting plate for connecting the slide rail. In step S1, when drawing the pre-installation position of the anchor on the outer wall of the chimney from bottom to top, it is necessary to draw the installation position of the expansion bolt for each anchor. When installing the anchor, holes need to be drilled at the drawn expansion bolt installation positions, and then the expansion bolts are installed through the drilled holes. The washer nuts are tightened to fix the anchor. S2, Platform moving slide construction: Several slides are set along the circumference of the chimney, and their length is set along the height of the chimney. The slides are installed layer by layer from bottom to top. First, pad blocks are placed on the ground, the first layer of slides is placed on the pad blocks, and then pipe clamps are used to fix the slides to the corresponding anchors. The second and above slides are first connected and fixed to the lower slides, and then pipe clamps are used to tighten them to the corresponding anchors. On the outer wall of the chimney, ladders are also installed from bottom to top. The ladders are set along the height of the chimney and are fixed to the outer wall of the chimney by anchors and pipe clamps. The slide is made of several sections of steel pipes that are inserted into each other. One end of the steel pipe is equipped with a sleeve that matches the size of the steel pipe so that the sections of steel pipes can be inserted into each other. The slide is connected and fixed to the anchor by U-shaped pipe clamps. S3, Triangular support installation: Install the triangular support onto the top slide rail and secure it with pipe clamps at both ends; S4, Operating platform installation: The operating platform is installed on the triangular support, and the operating platform is equipped with railings; the operating platform is arranged in a ring shape and its size is adapted to the diameter of the chimney. S5, Wall Removal: Personnel stand on the operating platform and then chisel a wall removal joint every 3-5m along the chimney's circumference. The wall removal joints are set along the height of the chimney. Chisel from top to bottom until it is 150-300mm away from the operating platform. Apply force into the chimney on the concrete slab between the wall removal joints and remove the bottom of the concrete slab from the connection between it and the lower chimney layer, causing the concrete slab to fall into the chimney until all the concrete slabs between the wall removal joints on the upper side of the operating platform are removed. S6, Moving the operating platform: symmetrically suspend the electric hoists on the upper edge of the chimney, connect the hooks of the electric hoists to the operating platform, and lift the operating platform using the electric hoists; then suspend the basket downwards from the operating platform, with personnel standing inside the basket, remove the triangular support and move it down, fixing it to the next section of the slide; then, using the electric hoist, slowly lower the platform onto the triangular support to carry out the demolition work of the next section of the chimney sidewall; S7: Repeat S5 and S6 until all parts of the chimney to be demolished are removed.

2. The method for high-altitude demolition of a concrete chimney according to claim 1, characterized in that: The triangular support includes an upright, a horizontal bar, and a diagonal bar. The upright, horizontal bar, and diagonal bar are all made of channel steel. The grooved surface of the channel steel of the upright is fastened to the slide rail steel pipe. A pipe clamp is installed at each of the upper and lower ends of the upright, and the upright is fixed to the slide rail steel pipe by the pipe clamp.

3. The method for high-altitude demolition of a concrete chimney according to claim 1, characterized in that: The operating platform consists of several platform units connected in a ring shape. Each platform unit includes a support frame and a platform plate mounted on the support frame. The platform plate has an arc-shaped structure with a large end and a small end. The large end has a slot for receiving the small end. The platform plates of adjacent platform units are connected by the small end and the large end with the slot.

4. The method for high-altitude demolition of a concrete chimney according to claim 3, characterized in that: Several 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 then inserted into the pin holes of the two platform plates to fix the two adjacent platform plates.

5. The method for high-altitude demolition of a concrete chimney according to claim 4, characterized in that: Every 1m along the outer ring of each platform panel, a support rod is welded to support the railing.

6. The method for high-altitude demolition of a concrete chimney according to claim 3, characterized in that: Each platform has a flip-top manhole.

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