CN112127697B - Dismantling method of reinforced concrete chimney - Google Patents
Dismantling method of reinforced concrete chimney Download PDFInfo
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- CN112127697B CN112127697B CN202011028929.7A CN202011028929A CN112127697B CN 112127697 B CN112127697 B CN 112127697B CN 202011028929 A CN202011028929 A CN 202011028929A CN 112127697 B CN112127697 B CN 112127697B
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- chimney
- wall
- dismantling
- reinforced concrete
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/28—Chimney stacks, e.g. free-standing, or similar ducts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/08—Wrecking of buildings
- E04G2023/087—Wrecking of buildings of chimneys, smoke stacks or the like
Abstract
The invention discloses a method for dismantling a reinforced concrete chimney, which is characterized in that an annular operating platform is arranged on the outer side surface of the wall of the chimney to be dismantled, the wall of the chimney on the upper part of the operating platform is divided into unit dismantling blocks along the vertical direction, slot grooves are respectively cut in the vertical direction and the horizontal direction of the unit dismantling blocks, reinforcing steel bars at the slot grooves are cut off, the unit dismantling blocks are pushed into the wall of the chimney, the operating platform moves downwards along with the dismantling, and the operation is repeated until the residual height of the chimney can be directly dismantled. The method for dismantling the reinforced concrete chimney provided by the invention has the advantages that the chimney wall is divided into blocks from top to bottom, the blocks are respectively unloaded into the chimney wall, then concrete slag and other construction wastes are cleaned from the flue, the interference and influence on the surrounding environment are reduced, and the construction difficulty of dismantling the towering reinforced concrete chimney is solved under the conditions that the construction site is narrow, surrounding buildings are dense and the dismantling cannot be carried out.
Description
Technical Field
The invention relates to the technical field of chimney demolition, in particular to a method for demolishing a reinforced concrete chimney.
Background
The chimney mainly has the functions of drawing fire and smoke, exhausting smoke and improving combustion conditions. The chimney effect is the result of the combined action of the hot pressure formed by the indoor and outdoor temperature difference and the outdoor air pressure, usually the former is the main one, and the hot pressure value is in direct proportion to the air density difference generated by the indoor and outdoor temperature difference and the height difference of the air inlet and outlet. The chimney is generally divided into a brick chimney, a reinforced concrete chimney and a steel chimney.
When the reinforced concrete chimney is dismantled, the reinforced concrete chimney is generally dismantled by adopting an integral laying method, but the construction difficulty is caused to the dismantling work of the reinforced concrete chimney because the chimney cannot be integrally laid due to the limitation of narrow site and the condition that peripheral buildings cannot be dismantled in advance.
Therefore, how to change the current situation that the whole reinforced concrete chimney is difficult to be laid down and dismantled under the conditions that the site is limited and the surrounding buildings are dense in the prior art becomes a problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention aims to provide a method for dismantling a reinforced concrete chimney, which aims to solve the problems in the prior art and ensure that the reinforced concrete chimney can be smoothly dismantled under the conditions of limited site and dense surrounding buildings.
In order to achieve the purpose, the invention provides the following scheme: the invention provides a method for dismantling a reinforced concrete chimney, which comprises the following steps:
step one, arranging an annular operating platform on the outer side surface of the chimney wall to be dismantled, wherein the operating platform is detachably connected with the chimney wall;
secondly, dividing a chimney barrel wall at the upper part of the operation platform into unit disassembling blocks along the vertical direction;
thirdly, cutting a slot penetrating through the wall of the chimney on a vertical dividing line of the wall of the chimney;
cutting off the steel bars in the horizontal direction in the chimney wall at the cut slot which vertically penetrates through the chimney wall;
step five, cutting a slot along the horizontal direction at the outer side of the chimney cylinder wall at the bottom of the divided unit disassembly block, wherein the depth of the slot is smaller than the thickness of the chimney cylinder wall;
sixthly, cutting off the steel bars in the vertical direction in the chimney wall at the seam groove penetrating through the chimney wall in the horizontal direction;
step seven, ejecting the unit disassembly block into the wall of the chimney;
step eight, cleaning concrete slag through a flue;
and step nine, the operation platform moves downwards along with the dismantling, the operations from the step two to the step eight are repeated until the residual height of the chimney can be directly dismantled, the residual part and the foundation of the chimney are dismantled, and the ground is cleaned and leveled.
Preferably, in the third step, the width of the slot drilled in the vertical direction and penetrating through the wall of the chimney is 200-300 mm.
Preferably, in the fifth step, the width of the slot cut on the outer side of the chimney wall along the horizontal direction is 200-300 mm.
Preferably, in the fifth step, the depth of the slot cut on the outer side of the chimney wall in the horizontal direction is half of the thickness of the chimney wall.
Preferably, in the ninth step, the height of each descending of the operation platform is 1-1.2 m.
Preferably, in the ninth step, when the residual part of the chimney is 6m or the operating platform is lowered to be 1.5m away from the ground, the residual part of the chimney and the foundation are detached by using a hook machine with a cannon head, and the field is cleaned.
Preferably, in the third step and the fifth step, a pneumatic pick is used for cutting a slot; and step four and step six, burning off the reinforcing steel bars in the wall of the chimney by using an acetylene oxygen welding gun.
Preferably, in the seventh step, the unit disassembling block is jacked into the wall of the chimney barrel by using a jack.
Compared with the prior art, the invention has the following technical effects: the invention relates to a method for dismantling a reinforced concrete chimney, which is characterized in that an annular operating platform is arranged on the outer side surface of the chimney wall to be dismantled, the chimney wall at the upper part of the operating platform is divided into unit dismantling blocks along the vertical direction, slot grooves are respectively cut in the vertical direction and the horizontal direction of the unit dismantling blocks, reinforcing steel bars at the slot grooves are cut off, the unit dismantling blocks are pushed into the chimney wall, the operating platform moves downwards along with the dismantling, and the operation is repeated until the residual height of the chimney can be directly dismantled. The method for dismantling the reinforced concrete chimney provided by the invention has the advantages that the chimney wall is divided into blocks from top to bottom, the blocks are respectively unloaded into the chimney wall, then concrete slag and other construction wastes are cleaned from the flue, the interference and influence on the surrounding environment are reduced, and the construction difficulty of dismantling the towering reinforced concrete chimney is solved under the conditions that the construction site is narrow, surrounding buildings are dense and the dismantling cannot be carried out.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a flow chart of a method for dismantling a reinforced concrete chimney according to the present invention;
FIG. 2 is a schematic view of the direction of a front view when a chimney is dismantled by the method for dismantling a reinforced concrete chimney according to the present invention;
FIG. 3 is a schematic view in a top view illustrating a chimney disassembled by the method for disassembling a reinforced concrete chimney according to the present invention;
wherein, 1 is the operation platform, 2 is the unit dismantlement piece, 3 is the slot, and 4 is the chimney section of thick bamboo wall.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a method for dismantling a reinforced concrete chimney, which aims to solve the problems in the prior art and ensure that the reinforced concrete chimney can be smoothly dismantled under the conditions of limited site and dense surrounding buildings.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 1 to 3, fig. 1 is a flowchart illustrating a method for dismantling a reinforced concrete chimney according to the present invention, fig. 2 is a schematic view illustrating a front view direction of dismantling the chimney by using the method for dismantling a reinforced concrete chimney according to the present invention, and fig. 3 is a schematic view illustrating a top view direction of dismantling the chimney by using the method for dismantling a reinforced concrete chimney according to the present invention.
The invention provides a method for dismantling a reinforced concrete chimney, which comprises the following steps:
step one, an annular operating platform 1 is arranged on the outer side face of a chimney wall 4 to be dismantled, and the operating platform 1 is detachably connected with the chimney wall 4, so that the operating platform 1 can conveniently descend along with the dismantling process.
And step two, dividing the chimney barrel wall 4 at the upper part of the operating platform 1 into unit disassembling blocks 2 along the vertical direction.
And step three, cutting a slot 3 penetrating through the chimney wall 4 on a vertical dividing line of the chimney wall 4.
And step four, cutting off the steel bars in the horizontal direction in the chimney wall 4 at the slotted groove 3 which vertically penetrates through the chimney wall 4.
And fifthly, cutting a slot 3 along the horizontal direction at the outer side of the chimney barrel wall 4 at the bottom of the divided unit disassembly block 2, wherein the depth of the slot 3 is smaller than the thickness of the chimney barrel wall 4.
And step six, cutting off the steel bars in the vertical direction in the chimney wall 4 at the position of the slot 3 penetrating through the chimney wall 4 in the horizontal direction of the cutting.
And step seven, ejecting the unit disassembly block 2 into the chimney barrel wall 4.
And step eight, cleaning concrete slag through a flue.
And step nine, the operation platform 1 moves downwards along with the dismantling, the operations from the step two to the step eight are repeated until the residual height of the chimney can be directly dismantled, the residual part and the foundation of the chimney are dismantled, and the field is cleaned and leveled.
The invention relates to a method for dismantling a reinforced concrete chimney, which is characterized in that an annular operating platform 1 is arranged on the outer side surface of a chimney wall 4 to be dismantled, the chimney wall 4 at the upper part of the operating platform 1 is divided into unit dismantling blocks 2 along the vertical direction, slot 3 is respectively cut in the vertical direction and the horizontal direction of the unit dismantling blocks 2, steel bars at the slot 3 are cut off, the unit dismantling blocks 2 are pushed into the chimney wall 4, the operating platform 1 moves downwards along with the dismantling, and the operation is repeated until the residual height of the chimney can be directly dismantled. According to the method for dismantling the reinforced concrete chimney, the chimney wall 4 is divided into the blocks from top to bottom, the blocks are respectively unloaded into the chimney wall 4, then concrete slag and other construction waste are cleaned from the flue, interference and influence on the surrounding environment are reduced, and the construction problem of dismantling the towering reinforced concrete chimney is solved under the conditions that the construction site is narrow, surrounding buildings are dense and the chimney cannot be dismantled.
It should be noted that, the chimney wall 4 is divided into the unit disassembly blocks 2 along the vertical direction, the division of the unit disassembly blocks 2 is determined according to the diameters and circumferences of the chimney walls 4 with different heights, the diameter, the slope and the circumference of the upper chimney wall 4 are small, and the height and the width of the unit disassembly blocks 2 are divided into smaller parts; the lower cylinder wall has large diameter, large slope and large circumference, which can be properly large, so that the unit disassembly block 2 can be poured into the chimney without being clamped, and certain construction efficiency is ensured.
In the present embodiment, in the third step and the fifth step, the width of the slot 3 drilled in the vertical direction and penetrating through the chimney wall 4 is 200-300 mm; similarly, the width of the slot 3 cut on the outer side of the chimney wall 4 along the horizontal direction is 200-300mm, so that the construction difficulty is reduced.
In step five, in order to ensure that the unit detachment block 2 can be smoothly pushed into the chimney wall 4, the depth of the slit 3 cut in the horizontal direction outside the chimney wall 4 is half the thickness of the chimney wall 4.
Specifically, in the ninth step, the descending height of the operation platform 1 is 1-1.2m each time, and the descending height is determined according to the actual situation in the specific construction process.
And step nine, when the residual part of the chimney is 6m or the operating platform 1 is lowered to be 1.5m away from the ground, detaching the residual part of the chimney and the foundation by using a hook machine with a gun head, and cleaning and leveling the field.
More specifically, in the third step and the fifth step, the air pick is used for cutting the slot 3, so that the operation is convenient. In the fourth step and the sixth step, the reinforcing steel bars in the chimney wall 4 are blown by using an acetylene oxygen welding gun, and preparation is made for pouring the unit disassembly block 2 into the chimney wall 4.
In the present embodiment, in the seventh step, the unit detaching block 2 is pushed into the chimney wall 4 at the slot 3 at the bottom of the unit detaching block 2 along the horizontal direction of the chimney outer wall by using a jack.
The invention relates to a method for dismantling a reinforced concrete chimney, which is characterized in that an annular operating platform 1 is arranged on the outer side surface of a chimney wall 4 to be dismantled, the chimney wall 4 is divided into blocks from top to bottom and is respectively unloaded into the chimney wall 4, and then concrete slag and other construction wastes are cleaned from a flue, so that the interference and influence on the surrounding environment are reduced, the construction problem of dismantling the high-rise reinforced concrete chimney is solved under the conditions that the construction site is narrow, surrounding buildings are dense and can not be dismantled, the dismantling method has strong operability, the interference on the surrounding environment is small, and the construction safety is guaranteed.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (7)
1. A method for dismantling a reinforced concrete chimney is characterized by comprising the following steps:
step one, arranging an annular operating platform on the outer side surface of the chimney wall to be dismantled, wherein the operating platform is detachably connected with the chimney wall;
secondly, dividing a chimney barrel wall at the upper part of the operation platform into unit disassembling blocks along the vertical direction;
thirdly, cutting a slot penetrating through the wall of the chimney on a vertical dividing line of the wall of the chimney;
cutting off the steel bars in the horizontal direction in the chimney wall at the cut slot which vertically penetrates through the chimney wall;
step five, cutting a slot along the horizontal direction at the outer side of the chimney cylinder wall at the bottom of the divided unit disassembly block, wherein the depth of the slot is smaller than the thickness of the chimney cylinder wall; the depth of a slot cut on the outer side of the chimney wall along the horizontal direction is half of the thickness of the chimney wall;
sixthly, cutting off the steel bars in the vertical direction in the chimney wall at the seam groove penetrating through the chimney wall in the horizontal direction;
step seven, ejecting the unit disassembly block into the wall of the chimney;
step eight, cleaning concrete slag through a flue;
and step nine, the operation platform moves downwards along with the dismantling, the operations from the step two to the step eight are repeated until the residual height of the chimney can be directly dismantled, the residual part and the foundation of the chimney are dismantled, and the ground is cleaned and leveled.
2. The demolition method of a reinforced concrete chimney according to claim 1, characterized in that: in the third step, the width of the slot which is cut in the vertical direction and penetrates through the wall of the chimney barrel is 200-300 mm.
3. The demolition method of a reinforced concrete chimney according to claim 1, characterized in that: in the fifth step, the width of the slot cut on the outer side of the chimney wall along the horizontal direction is 200-300 mm.
4. The demolition method of a reinforced concrete chimney according to claim 1, characterized in that: in the ninth step, the height of each descending of the operation platform is 1-1.2 m.
5. The demolition method of a reinforced concrete chimney according to claim 1, characterized in that: and step nine, when the residual part of the chimney is 6m or the operating platform is lowered to be 1.5m away from the ground, detaching the residual part of the chimney and the foundation by using a hook machine with a gun head, and cleaning the field.
6. The demolition method of a reinforced concrete chimney according to claim 1, characterized in that: in the third step and the fifth step, a pneumatic pick is used for cutting a slot; and step four and step six, burning off the reinforcing steel bars in the wall of the chimney by using an acetylene oxygen welding gun.
7. The demolition method of a reinforced concrete chimney according to claim 1, characterized in that: and step seven, jacking the unit disassembly block into the wall of the chimney cylinder by using a jack.
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| CN202011028929.7A CN112127697B (en) | 2020-09-27 | 2020-09-27 | Dismantling method of reinforced concrete chimney |
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| CN202011028929.7A CN112127697B (en) | 2020-09-27 | 2020-09-27 | Dismantling method of reinforced concrete chimney |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114278113A (en) * | 2021-12-29 | 2022-04-05 | 北京首钢建设集团有限公司 | Construction method for dismantling reinforced concrete chimney in complex environment |
| CN115523813B (en) * | 2022-10-10 | 2023-06-16 | 武汉爆破有限公司 | Chimney in-situ collapse blasting demolition method combining horizontal and vertical cuts |
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