CN111173312B - Method for heating-cooling demolition of high-rise brick structure - Google Patents
Method for heating-cooling demolition of high-rise brick structure Download PDFInfo
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- CN111173312B CN111173312B CN201911411979.0A CN201911411979A CN111173312B CN 111173312 B CN111173312 B CN 111173312B CN 201911411979 A CN201911411979 A CN 201911411979A CN 111173312 B CN111173312 B CN 111173312B
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Abstract
The invention provides a heating-cooling demolition method for a high-rise brick structure, which comprises the steps of measuring the height H of the high-rise brick structure and the farthest distance D from the outer side wall of the high-rise brick structure to an adjacent building, and calculating whether the top of the high-rise brick structure needs to be locally demolished or not; hammering wood ridges into the bottom of the high-rise brick structure, and locally dismantling bricks; and (3) carrying out local heating on the towering brick structure: igniting wood ridges on the outer side of the high-rise brick structure; local cooling of the high-rise brick structure: after the wooden ridges are burnt out, holes appear at the wooden ridges at the bottom of the high-rise brick structure, and the high-rise brick structure is integrally poured towards one side of the holes; and (5) extinguishing local residual fire, dismantling the dumped building rubbish, completing dismantling the high-rise building, and recycling bricks. The method is a safe and efficient dismantling method, and the local holes of the towering brick structure are formed by heating and cooling the towering brick structure and burning the wood ridges, and the towering brick structure is wholly toppled by using the dead weight of the towering brick structure to realize the dismantling of the towering brick structure.
Description
Technical Field
The invention belongs to the field of civil engineering, and particularly relates to a method for heating-cooling demolition of a towering brick structure.
Background
The urbanization construction process of China is rapidly developed, the number of the current towns is nearly 8 hundred million, and the towns are densely built and populated. With the construction of a large number of high-rise super high-rise buildings and modern infrastructures, a lot of old high-rise brick structures in the past must be dismantled. The area of the buildings and structures dismantled every year in China is more than 4 hundred million square meters. The proportion of the high-rise brick structures in the buildings and structures to be dismantled is not low. Especially, the attention of the modern society on natural protection and the arousal of human health consciousness, in order to realize the sustainable development of the society and reduce carbon emission, a plurality of old high-pollution structures such as a chimney, a water tower, a cooling tower and the like which are built in the past are dismantled. However, such high-rise structures are mostly built in dense urban residential areas, the dismantling of the high-rise structures in the urban dense building areas has a great safety risk, and once a safety accident occurs in the dismantling process, the influence is severe and the loss is heavy.
Conventional dismantling means at the present stage of China mainly comprise mechanical dismantling, blasting dismantling, manual dismantling and the like, and if mechanical dismantling is adopted, the problem that large-scale equipment is difficult to enter a field exists; if blasting demolition is adopted, the lateral collapse of the high-rise brick construction easily crushes nearby buildings, dust and noise pollution exists, and adverse effects are caused to surrounding buildings and human living environments; if manual demolition is adopted, the problems that demolition speed is low, demolished building rubbish is difficult to transport vertically, and safety in the demolition process is difficult to guarantee exist. Therefore, it is necessary to develop a new demolition method for high-rise brick structures to solve the above problems.
Disclosure of Invention
In view of the above, the invention aims to provide a method for demolishing a towering brick structure by heating and cooling, so as to solve the problems of low safety, low overall technical level, low demolition efficiency, large noise and dust and the like of the existing method for demolishing the towering brick structure.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for heating-cooling demolition of a towering brick structure comprises the following steps:
s1: measuring the height H of the high-rise brick structure and the farthest distance D from the outer side wall of the high-rise brick structure to an adjacent building, and calculating whether the top of the high-rise brick structure needs to be locally dismantled or not;
s2: hammering wood ridges into the bottom of the high-rise brick structure, and locally dismantling bricks;
s21: determining the range of partially dismantling bricks at the bottom of the high-rise brick structure;
s22: hammering wood ridges in a range of locally removing bricks at the bottom of the high-rise brick structure, and removing the bricks one by one, wherein the wood ridges are arranged in two layers along the height direction of the high-rise brick structure, each layer of wood ridges is continuously arranged along the outer side wall of the high-rise brick structure, and each layer of wood ridges is arranged along the outer side wall of the high-rise brick structure, exceeds 1/2 of the circumferential area of the high-rise brick structure at the layer and is less than 2/3 of the circumferential area of the high-rise brick structure at the layer;
s3: and (3) carrying out local heating on the towering brick structure: igniting the wooden ridges hammered into the high-rise brick structure at the outer side of the high-rise brick structure, and then ensuring that personnel and equipment are removed from the site;
s4: local cooling of the high-rise brick structure: after wood ridges of the towering brick structure are burned for about 30-60min, open fire is gradually weakened, the towering brick structure is locally cooled, holes are formed in the log ridges at the bottom of the towering brick structure after the wood ridges are burned out, and the towering brick structure is integrally poured towards one side of the holes;
s5: and (5) extinguishing local fire residues, removing the dumped construction waste when the high-rise brick structure is cooled to normal temperature, completing the removal of the high-rise structure, and recovering bricks.
Further, in S1, when H < D, the top of the towering brick structure is not partially dismantled;
and when H is larger than or equal to D, partially dismantling the top of the towering brick structure, and ensuring that the height H1< D of the partially dismantled towering brick structure.
Further, in S1, the specific step of partially dismantling the top of the towering brick structure is as follows:
s11: the personnel with dismantling technology and ability put through the safety rope and fix the suspension position of the safety rope, climb to the top of the high-rise brick structure, and manually dismantle the high-rise brick structure from top to bottom;
s12: the vertical transportation work of the construction waste is dismantled, a profile steel support parallel to the ground plane is designed at the top of the high-rise building, a directional pulley is suspended and arranged by taking the profile steel support as a fixed point, the hanging basket is lifted through the directional pulley, the construction waste is loaded into the hanging basket, the hanging basket is transported to the ground from a high place, and the height of the high-rise brick building is dismantled from top to bottom and is 1.2 (H-D);
s13: after the top part of the high-rise structure is partially dismantled, the hanging basket, the pulley and the section steel support are disassembled, and personnel are withdrawn from the high position to the ground.
Further, in S21, determining a range of bricks partially removed from the bottom of the towering brick structure, specifically: selecting the initial position of the partially dismantled bricks within the height range of about 1-1.5m from the bottom of the high-rise brick structure, and selecting the height range of 3-4 times of the thickness of the bricks as the partially dismantled bricks.
Further, in S22, selecting a square wood ridge with a cross section of 60mm x 120mm and a length of 2-3 times of the wall thickness of the high-rise brick structure, facing and tightly attaching the square wood ridge to a brick on the outer side wall of the high-rise brick structure, hammering one end of the square wood ridge far away from the outer side wall of the high-rise brick structure, hammering the square wood ridge into the high-rise brick structure, removing the brick at the position, repeating the above brick removing process along the outer side wall of the high-rise brick structure until the square wood ridge is covered with 1/2-2/3 of the circumferential area of the high-rise brick structure at the corresponding layer, and completing the construction of two layers of square wood ridges.
Further, in S22, the square timber ridges are manually hammered into the towering brick structure until the thickness of the towering brick structure is penetrated, and the length of the square timber ridges extending into the towering brick structure is 100mm from the inner side wall of the towering brick structure to the inner side.
Further, in S22, the pitch of the two layers of square wooden ridges arranged along the height direction of the towering brick structure is 60 to 120 mm.
Further, the cross section of the towering brick structure is circular or rectangular.
Compared with the prior art, the method for heating-cooling demolition of the towering brick structure has the following advantages:
(1) according to the method for dismantling the high-rise brick structure, the high-rise brick structure is heated and cooled, the wood ridges are combusted to form local holes of the high-rise brick structure, the high-rise brick structure is wholly dumped by utilizing the dead weight of the high-rise brick structure, the dismantling of the high-rise brick structure is realized, the high-altitude operation is basically avoided, no dust pollution is caused in the dismantling process, and the method is a safe and efficient dismantling method.
(2) According to the method for dismantling the towering brick structure, the highest temperature of the bricks does not exceed 500 ℃, the mechanical properties of the bricks can be maintained, the bricks can be recycled, and the method is a green dismantling method and is beneficial to sustainable development of civil engineering.
(3) The method can be applied to the demolition of the high-rise brick structures in the urban dense areas and can also be applied to the demolition of the high-rise brick structures in the open fields.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a flowchart of a construction method for heating-cooling demolition of a high-rise brick structure according to an embodiment of the invention;
FIG. 2 is a schematic view of a partial annular plane defined by the outer wall and the inner wall of the high-rise brick structure to be dismantled;
fig. 3 is a schematic plan view of a stupefied towering brick structure.
Description of reference numerals:
1-area of a plane circular ring of the high-rise brick structure, 2-area needing to be dismantled, and 3-wood ridge.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The method can be used for the circular-section high-rise brick structures and the rectangular-section high-rise brick structures, and the heating-cooling dismantling method is the same.
The present invention will be described in detail below with reference to the accompanying drawings by taking a circular cross-section high-rise brick structure as an example.
As shown in fig. 1 to 3, the method for removing the high-rise brick structure by heating and cooling comprises the following steps:
s1: measuring the height H of the high-rise brick structure and the farthest distance D from the outer side wall of the high-rise brick structure to an adjacent building, and calculating whether the top of the high-rise brick structure needs to be locally dismantled or not;
when H < D, the top of the towering brick structure is not locally dismantled;
when H is larger than or equal to D, locally dismantling the top of the towering brick structure, and ensuring that the height H1< D of the towering brick structure after local dismantling is higher than D;
the method comprises the following specific steps of partially dismantling the top of the towering brick structure:
s11: the personnel with dismantling technology and ability put through the safety rope and fix the suspension position of the safety rope, climb to the top of the high-rise brick structure, and manually dismantle the high-rise brick structure from top to bottom;
s12: vertical transportation work of construction waste is needed in the dismantling process, a profile steel support parallel to the ground plane is designed at the top of the high-rise building, the profile steel support is used as a fixed point, a directional pulley is suspended and arranged, a hanging basket is lifted through the directional pulley, the construction waste is loaded into the hanging basket, then the hanging basket is transported to the ground from a high position, and the height of the high-rise brick building is dismantled from top to bottom and is 1.2 (H-D);
s13: after the top part of the high-rise structure is partially dismantled, a hanging basket, a pulley and a profile steel support are disassembled, and personnel are withdrawn from a high place to the ground;
s2: hammering wood ridges into the bottom of the high-rise brick structure, and locally dismantling bricks;
s21: determining the range of partially dismantling bricks at the bottom of the high-rise brick structure; the method specifically comprises the following steps: selecting the initial position of the partially dismantled bricks within the height range of about 1.2m from the bottom of the high-rise brick structure, and selecting the height range of 3-4 times of the thickness of the bricks as the height range of the partially dismantled bricks, namely 180 mm and 240 mm;
s22: hammering wood ridges in a range of locally removing bricks at the bottom of the high-rise brick structure, removing the bricks one by one, wherein the wood ridges are arranged in two layers along the height direction of the high-rise brick structure, the distance between the two layers of wood ridges arranged along the height direction of the high-rise brick structure is 60-120mm, each layer of wood ridges is continuously arranged along the outer side wall of the high-rise brick structure, and each layer of wood ridges is arranged along the outer side wall of the high-rise brick structure, is 1/2 which exceeds the circumferential area of the high-rise brick structure at the layer and is 2/3 which is smaller than the circumferential area of the high-rise brick structure at the layer; the method specifically comprises the following steps: selecting square wood ridges with the cross section of 60mm x 120mm and the length of 2-3 times of the wall thickness of the high-rise brick structure, constructing two layers of square wood ridges, facing and tightly attaching the square wood ridges to bricks on the outer side wall of the high-rise brick structure, hammering one end of each square wood ridge far away from the outer side wall of the high-rise brick structure, hammering the square wood ridges into the high-rise brick structure, dismantling the bricks at the position, repeating the brick dismantling process along the outer side wall of the high-rise brick structure until the square wood ridges are covered with 1/2-2/3 of the circumferential area of the high-rise brick structure at the corresponding layer, and completing construction of the two layers of square wood ridges;
because the high-rise brick structure is built by mortar, the shearing strength of the mortar is generally less than 0.3MPa, the square timber ridges can be manually hammered into the high-rise brick structure until the wall thickness of the high-rise brick structure is penetrated, and the length of the square timber ridges extending into the high-rise brick structure is 100mm from the inner side wall of the high-rise brick structure to the inner side;
s3: and (3) carrying out local heating on the towering brick structure: igniting the wooden ridges hammered into the high-rise brick structure at the outer side of the high-rise brick structure, and then ensuring that personnel and equipment are removed from the site; in the combustion process of the square wood ridges, the local temperature of the fire-affected part of the towering brick structure is generally not more than 500 ℃ due to the limited number of the square wood ridges;
s4: local cooling of the high-rise brick structure: after the wood ridges of the towering brick structure are burnt for about 30-60min, open fire is gradually weakened, the wood ridges of the towering brick structure are close to being burnt out, the towering brick structure is locally cooled, holes are formed in the wood ridges at the bottom of the towering brick structure after the wood ridges are burnt out, the dead weight of the towering brick structure at the upper part cannot be supported by the rest area of the towering brick structure, the towering brick structure is integrally poured towards one side of the holes, and the towering brick structure is separated from bricks in the pouring process, so that the subsequent dismantling work is facilitated;
s5: and (3) extinguishing local fire residues, removing the dumped construction waste when the high-rise brick structure is cooled to normal temperature, carrying out construction waste transportation work on the ground, completing the removal of the high-rise structure, and recovering bricks.
The invention has the characteristics of controllable dumping direction, low dismantling cost, high efficiency, strong safety, convenient construction and wide application range.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A method for heating-cooling demolition of a towering brick structure is characterized by comprising the following steps: the method comprises the following steps:
s1: measuring the height H of the high-rise brick structure and the farthest distance D from the outer side wall of the high-rise brick structure to an adjacent building, and calculating whether the top of the high-rise brick structure needs to be locally dismantled or not;
s2: hammering wood ridges into the bottom of the high-rise brick structure, and locally dismantling bricks;
s21: determining the range of partially dismantling bricks at the bottom of the high-rise brick structure;
s22: hammering wood ridges in a range of locally removing bricks at the bottom of the high-rise brick structure, and removing the bricks one by one, wherein the wood ridges are arranged in two layers along the height direction of the high-rise brick structure, each layer of wood ridges is continuously arranged along the outer side wall of the high-rise brick structure, and each layer of wood ridges is arranged along the outer side wall of the high-rise brick structure, exceeds 1/2 of the circumferential area of the high-rise brick structure at the layer and is less than 2/3 of the circumferential area of the high-rise brick structure at the layer;
s3: and (3) carrying out local heating on the towering brick structure: igniting the wooden ridges hammered into the high-rise brick structure at the outer side of the high-rise brick structure, and then ensuring that personnel and equipment are removed from the site;
s4: local cooling of the high-rise brick structure: after wood ridges of the towering brick structure are burned for 30-60min, open fire is gradually weakened, the towering brick structure is locally cooled, holes are formed in the log ridges at the bottom of the towering brick structure after the wood ridges are burned out, and the towering brick structure is integrally poured towards one side of the holes;
s5: and (5) extinguishing local fire residues, removing the dumped construction waste when the high-rise brick structure is cooled to normal temperature, completing the removal of the high-rise structure, and recovering bricks.
2. The method for heating-cooling demolition of a high-rise brick structure according to claim 1, wherein: in the step S1, when H < D, the top of the towering brick structure is not partially dismantled;
and when H is larger than or equal to D, partially dismantling the top of the towering brick structure, and ensuring that the height H1< D of the partially dismantled towering brick structure.
3. The method for heating-cooling demolition of a high-rise brick structure according to claim 2, wherein: in S1, the specific steps of partially dismantling the top of the towering brick structure are as follows:
s11: the personnel with dismantling technology and ability put through the safety rope and fix the suspension position of the safety rope, climb to the top of the high-rise brick structure, and manually dismantle the high-rise brick structure from top to bottom;
s12: the vertical transportation work of the construction waste is dismantled, a profile steel support parallel to the ground plane is designed at the top of the high-rise building, a directional pulley is suspended and arranged by taking the profile steel support as a fixed point, the hanging basket is lifted through the directional pulley, the construction waste is loaded into the hanging basket, the hanging basket is transported to the ground from a high place, and the height of the high-rise brick building is dismantled from top to bottom and is 1.2 (H-D);
s13: after the top part of the high-rise structure is partially dismantled, the hanging basket, the pulley and the section steel support are disassembled, and personnel are withdrawn from the high position to the ground.
4. The method for heating-cooling demolition of a high-rise brick structure according to claim 1, wherein: in S21, determining the range of bricks partially removed from the bottom of the towering brick structure, specifically: selecting the initial position of the partially dismantled brick within the height range of 1-1.5m from the bottom of the high-rise brick structure, and selecting the height range of 3-4 times of the thickness of the brick as the partially dismantled brick.
5. The method for heating-cooling demolition of a high-rise brick structure according to claim 4, wherein: in S22, selecting a wood ridge with a cross section of 60mm x 120mm and a length of 2-3 times of the wall thickness of the high-rise brick structure, facing and tightly attaching the wood ridge to a brick of the outer side wall of the high-rise brick structure, hammering one end of the wood ridge far away from the outer side wall of the high-rise brick structure, hammering the wood ridge into the high-rise brick structure, dismantling the brick at the position, repeating the brick dismantling process along the outer side wall of the high-rise brick structure until the wood ridge is covered with 1/2-2/3 of the circumferential area of the high-rise brick structure at the corresponding layer, and completing the construction of two layers of wood ridges.
6. The method for heating-cooling demolition of a high-rise brick structure according to claim 4, wherein: at S22, the wooden ridges are manually hammered into the towering brick structure until the wooden ridges penetrate the thickness of the towering brick structure, and the length of the wooden ridges extending into the towering brick structure is 100mm from the inner side wall of the towering brick structure to the inner side.
7. The method for heating-cooling demolition of a high-rise brick structure according to claim 4, wherein: in S22, the pitch of the two wood ridges arranged along the height direction of the towering brick structure is 60-120 mm.
8. The method for heating-cooling demolition of a high-rise brick structure according to claim 1, wherein: the cross section of the towering brick structure is round or rectangular.
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| CN111927144A (en) * | 2020-07-13 | 2020-11-13 | 陕西省建筑科学研究院有限公司 | Simple method for manually dismantling brick chimney |
| CN112324183A (en) * | 2020-10-23 | 2021-02-05 | 陕西省建筑科学研究院有限公司 | Method for dismantling masonry silo |
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