CN111962912A - Integral hoisting and dismantling construction method for high-altitude frame column - Google Patents
Integral hoisting and dismantling construction method for high-altitude frame column Download PDFInfo
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- CN111962912A CN111962912A CN202010817151.1A CN202010817151A CN111962912A CN 111962912 A CN111962912 A CN 111962912A CN 202010817151 A CN202010817151 A CN 202010817151A CN 111962912 A CN111962912 A CN 111962912A
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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
Abstract
The invention relates to the technical field of constructional engineering demolition, in particular to a construction method for integrally hoisting and demolishing a high-altitude frame column, which comprises the following steps: firstly, checking and calculating the bearing capacity of the lifting ring; secondly, checking and calculating the pulling resistance bearing capacity of the longitudinal ribs of the frame column; checking and calculating the bearing capacity of the hoisting ring and the automobile lifting hook binding steel wire rope; fourthly, removing concrete at the top of the frame column; fifthly, welding a hanging ring; sixth, frame column bottom concrete is removed; seventhly, the crane is in place and is in trial hoisting for the first time; eighthly, binding the cable wind rope and the cutting frame column; and ninthly, carrying out the second trial hoisting and the hoisting of the frame column. Compared with the prior art, the method provides scientific theoretical data support, solves the key technical problems of design and construction for integral hoisting and dismantling of the high-altitude frame column, is safe in construction, convenient to operate and low in cost, meets the green construction requirements of high efficiency and environmental protection, and has great popularization and application values.
Description
Technical Field
The invention relates to a high-altitude frame column integral hoisting and dismantling construction method, belongs to the technical field of high-altitude existing frame column integral hoisting and dismantling design and construction intersection, and is suitable for high-altitude frame column integral hoisting and dismantling design and construction with the use function needing to be changed in a multi-layer frame structure.
Background
In recent years, the design of frame columns for roofs becomes a common design scheme, and the design scheme is popularized and applied to numerous projects. However, with the improvement of the building technology and living standard in China, the building using unit meets the requirements of new using functions, the second optimization adjustment of the modeling is carried out by the frequent committee professional company, and the dismantling of the roof frame column is the first time.
The traditional high-altitude frame column dismantling construction method is that a worker stands on a mobile operation scaffold, concrete is crushed by a pneumatic pick one by one, and after all concrete is crushed, a cutting machine is used for cutting off the frame column reinforcing steel bars one by one. The crushed concrete and the waste steel bars are manually conveyed to the ground from the high altitude through a truck crane and then conveyed to a garbage yard for treatment through a carrier loader. The traditional construction method has low construction efficiency and long working time at high altitude of workers, not only consumes a large amount of manpower, material resources and financial resources, but also generates a large amount of noise and environmental pollution, and has no general popularization and application value.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the integral hoisting and dismantling construction method for the high-altitude frame column fully ensures that the frame column is hoisted to the ground after being dismantled integrally, is efficient, safe and reliable in construction, low in cost, meets the requirement of green construction, and solves the key technical problem of integral hoisting and dismantling design and construction of the high-altitude frame column.
The invention discloses a construction method for integrally hoisting and dismantling a high-altitude frame column, which aims to solve the technical problem and comprises the following steps:
firstly, checking and calculating the bearing capacity of the lifting ring:
1.1, checking and calculating:
according to the specification of concrete structure design Standard 9.7.6 in combination with the practical engineering, the hoisting ring adopts longitudinal bars of the frame column to be dismantledThe steel bars with matched grades are manufactured, and the design value f of the tensile stress of the steel bars calculated according to 2 sections of each hanging ring is determined under the action of the dead weight standard value of the frame columnd；
1.2, checking and calculating the bearing capacity of the lifting ring:
1) the tension of a single lifting ring is calculated according to the following formula:
2) the minimum diameter of the hanging ring is calculated according to the following formula:
in the above formula: g is the weight of the frame column in kg; n is the number of the hoisting rings; g is gravity acceleration, and 10N/kg is taken; f. ofdDesign value of tensile stress of hoisting ring in N/mm2；
Fourthly, checking and calculating the anti-pulling bearing capacity of the longitudinal ribs of the frame column:
2.1, checking and calculating:
when the frame column is too high, the longitudinal bars of the frame column need to be connected and lengthened, and when the connection position of the steel bars is located at the position of the frame column 1/3, the connection position is the most unfavorable, so that 1/3 of the height of the frame column is selected as the effective bonding length of the lifting ring for connecting the longitudinal bars;
2.2, checking and calculating the anti-pulling bearing capacity of the longitudinal ribs of the frame column:
1) calculating the uplift bearing capacity of a single longitudinal rib of the frame column: fb＝Aft＝ahft
2) And (3) checking and calculating the uplift bearing capacity of all the longitudinal bars of the frame column connected with the hoisting ring: fb′＝2n
3) And (3) judging the result of checking and calculating the uplift bearing capacity of the longitudinal ribs of the frame column: fbWhen the tensile strength is greater than or equal to G multiplied by G, the pulling resistance bearing capacity of the longitudinal ribs of the frame column meets the requirement; fbWhen the tensile strength is less than G multiplied by G, the pulling resistance bearing capacity of the longitudinal ribs of the frame column can not meet the requirement;
in the above formula: effective contact area of A-frame column longitudinal bar and concrete in unit mm2(ii) a a, the circumference of a single longitudinal rib connected with a hanging ring is in unit mm; h, the effective bonding length of a single longitudinal rib connected with the hanging ring is unit mm; f. oftDesign value of axial tensile strength of concrete in N/mm2；
Fifthly, checking and calculating the bearing capacity of the hoisting ring and the automobile lifting hook binding steel wire rope:
3.1, counting the weight of all frame columns to be dismantled, and then determining the maximum axial force F to be borne by the steel wire ropes；
3.2 according to the breaking tension of the steel wire rope not less than the maximum axial force FsSelecting a steel wire rope with a proper specification according to the standard of general purpose steel wire ropes on the principle of multiplying the safety factor;
fourthly, removing concrete at the top of the frame column:
1) erecting a movable scaffold, and paving a steel backing plate at the bottom of the scaffold body;
2) chiseling off concrete at the top of the frame column by using an air pick to expose the stirrups and the longitudinal bars;
fifthly, welding a hanging ring:
1) the hoisting ring and the corresponding longitudinal bar axis of the frame column are welded firmly by gas shielded welding, and the welding seam meets the requirement of a secondary welding seam;
2) after welding, detecting at least 3 welded junctions by adopting ultrasonic flaw detection, and performing next construction after meeting the requirement of a second-level weld joint;
sixth, frame column bottom concrete is eliminated:
concrete around the bottom of the frame column is removed by adopting an air pick, and the longitudinal bars are completely exposed, so that the requirement of cutting the reinforcing steel bars is met;
eighthly, positioning a crane and carrying out first trial hoisting:
7.1, placing a crane in place:
1) determining the type and the operation position of the crane according to the field condition and the calculation result, and drawing a plane layout diagram of the truck crane field;
2) accurately positioning the truck crane according to a truck crane plane layout drawing, keeping the distance between the truck crane head and a building or an existing tower crane, and meeting the requirement of the truck crane turning radius;
7.2, first trial hoisting:
1) connecting a lifting ring and an automobile crane lifting hook by using a steel wire rope determined by checking calculation, and firmly hanging the steel wire rope on the lifting hook;
2) the first trial hoisting is carried out, so that the hoisting ring is stretched to a stressed state;
eighthly, binding the cable wind rope and cutting the frame column:
8.1, binding a cable wind rope:
binding a cable rope on four sides of the frame column respectively to prevent the frame column from rotating after being lifted;
8.2, cutting the frame column:
1) when the truck crane and the hoisting ring are in a tensile stress state, all longitudinal bars at the bottom of the frame column are cut off;
2) after 4 cables of the wind ropes bound at the bottom of the frame column in advance are tensioned, core concrete in a steel bar cutting area at the bottom of the frame column is removed by a pneumatic pick, so that the frame column is in a hoisting state;
ninthly, trial hoisting for the second time and hoisting of the frame column:
9.1, second test hoisting:
carrying out secondary trial hoisting on the cut frame column, and carrying out formal hoisting after safety is ensured;
9.2, frame column hoisting:
1) in the process of hoisting the frame column, hoisting commanders unify whistle commands and control cable wind ropes on four sides to prevent the distortion stress of the hoisting ring caused by the rotation of the frame column during hoisting;
2) in the frame column hoisting process, personnel movement is strictly prohibited under the automobile hoisting arm.
And in the first step, the hoisting ring is made of steel bars matched with the grade of the longitudinal bars of the frame column to be dismantled.
And in the third step, the safety coefficient of the steel wire rope is 4-8.
The thickness of a steel backing plate paved at the bottom of the movable scaffold in the fourth step is 15-20 mm; the height of the concrete on the top of the frame column chiseled by the pneumatic pick is 100 mm-150 mm.
And in the seventh step, the distance between the head of the truck crane and the building or the existing tower crane is more than or equal to 3 m.
And in the seventh step, the steel wire rope is wound for 2 circles around the hanging ring and is firmly hung on the automobile crane hook.
And step seven, respectively binding a cable rope on four sides of the position about 1/5-1/6 at the bottom of the full height of the frame column.
And in the ninth step, the cut frame column is lifted to a height of 100-200 mm away from the floor, and is kept still for 4-8 min, so that formal hoisting is carried out after safety is ensured.
Compared with the prior art, the invention has the following beneficial effects:
1) providing a scientific calculation model and a design and construction method for the integral hoisting and dismantling engineering of the high-altitude frame column;
2) the construction method of integral hoisting and dismantling is creatively adopted, so that the problems of low construction efficiency, high construction cost, noise and environmental pollution caused by the traditional technology are effectively solved;
3) the lifting ring is made of steel bars matched with the grade of longitudinal bars of the frame column to be dismantled, and the lifting ring is in butt welding connection with the axis of the corresponding longitudinal bar of the frame column, so that the safety and reliability of hoisting are fully guaranteed;
4) binding a cable rope on four sides of the frame column respectively to prevent the frame column from rotating after being lifted;
5) after 4 cables of the wind ropes bound at the bottom of the frame column in advance are tensioned, core concrete in a steel bar cutting area at the bottom of the frame column is removed by a pneumatic pick, so that the frame column is in a hoisting state;
6) carrying out test hoisting twice, and carrying out formal hoisting after safety is ensured;
7) the steel wire rope winds 2 circles around the hanging ring, and the safety factor is improved by 2 times.
The method is safe in construction, convenient and fast to operate and low in cost, solves the key technical problem of integral hoisting and dismantling design and construction of the high-altitude frame column, meets the green construction requirement of high efficiency and environmental protection, and has great popularization and application values.
Drawings
FIG. 1 is a perspective view of a flying ring of the present invention;
FIG. 2 is a schematic view of the connection between the lifting ring and the longitudinal ribs of the frame column according to the present invention;
FIG. 3 is an elevation view of the frame post concrete chiseling and hawser arrangement of the present invention;
FIG. 4 is a diagram showing the deformation effect of the hoisting ring in the invention;
FIG. 5 is a plan view of the present invention cable arrangement;
in the figure: 1. a hoisting ring; 2. welding seams; 3. longitudinal ribs; 4. a frame column; 5. frame column top concrete; 6. frame column bottom concrete; 7. a guy rope.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings:
as shown in fig. 1 to 5, the construction method for integrally hoisting and dismantling the high-altitude frame column comprises the following steps:
firstly, checking and calculating the bearing capacity of the lifting ring 1:
1.1, checking and calculating:
according to the specification of 'concrete structure design Specification' 9.7.6 and the combination of engineering practice, the hoisting ring 1 is made of steel bars matched with the grade 3 of longitudinal bars of a frame column to be dismantled, and under the action of the dead weight standard value of the frame column 4, the design value f of the tensile stress of the steel bars calculated according to 2 sections of each hoisting ring 1 is determinedd；
1.2, checking and calculating the bearing capacity of the lifting ring 1:
1) the tension of a single lifting ring 1 is calculated according to the following formula:
2) the minimum diameter of the hoisting ring 1 is calculated according to the following formula:
in the above formula: g is the weight of the frame column 4 in kg; n is the number of the lifting rings 1; g is gravity acceleration, and 10N/kg is taken; f. ofdDesign value of tensile stress of hoisting ring 1 in N/mm2；
Sixthly, checking and calculating the anti-pulling bearing capacity of the frame column longitudinal bar 3:
2.1, checking and calculating:
when the frame column 4 is too high, the frame column longitudinal bar 3 needs to be connected and lengthened, and when the connection position of the steel bars is located at the position of the frame column 1/3, the connection position is the most unfavorable, so 1/3 of the height of the frame column 4 is selected as the effective bonding length of the hanging ring 1 connected with the longitudinal bar 3;
2.2, checking and calculating the anti-pulling bearing capacity of the frame column longitudinal rib 3:
1) and (3) calculating the anti-pulling bearing capacity of a single longitudinal rib 3 of the frame column 4: fb＝Aft＝ahft
2) And (3) checking and calculating the uplift bearing capacity of all the frame column longitudinal ribs connected with the hoisting ring 1: fb′＝2n
3) And (3) judging the result of the anti-pulling bearing capacity checking calculation of the longitudinal ribs of the frame column: fbWhen the tensile strength is greater than or equal to G multiplied by G, the pulling resistance bearing capacity of the longitudinal ribs 3 of the frame column meets the requirement; f′When the tensile strength is less than G multiplied by G, the pulling resistance bearing capacity of the frame column longitudinal bar 3 can not meet the requirement;
in the above formula: effective contact area of A-frame column longitudinal bar 3 and concrete, unit mm2(ii) a a, 3 circumferences of single longitudinal ribs connected with a lifting ring 1 are in unit mm; h, the effective bonding length of a single longitudinal rib 3 connected with the hanging ring 1 is unit mm; f. oftDesign value of axial tensile strength of concrete in N/mm2；
Seventhly, checking and calculating the bearing capacity of the hoisting ring 1 and the automobile lifting hook binding steel wire rope:
3.1, counting the weight of all frame columns 4 to be dismantled, and then determining the maximum axial force F to be borne by the steel wire ropes；
3.2 according to the breaking tension of the steel wire rope not less than the maximum axial force FsSelecting a steel wire rope with a proper specification according to the standard of general purpose steel wire ropes on the principle of multiplying the safety factor;
fourthly, removing concrete 5 at the top of the frame column:
1) erecting a movable scaffold, and paving a steel backing plate at the bottom of the scaffold body;
2) chiseling off the concrete 5 at the top of the frame column by using an air pick to expose the stirrups and the longitudinal reinforcements 3;
fifthly, welding the suspension ring 1:
1) the shaft centers of the lifting ring 1 and the corresponding longitudinal bar 3 of the frame column 4 are butt-welded firmly by gas shielded welding, and the welding seam 2 meets the requirement of a secondary welding seam;
2) after welding, detecting at least 3 welded junctions by adopting ultrasonic flaw detection, and performing next construction after meeting the requirement of a second-level weld joint;
sixth, frame column bottom concrete 6 is eliminated:
the concrete 6 at the bottom of the frame column is removed by adopting an air pick, and the longitudinal ribs 3 are completely exposed, so that the requirement of cutting the longitudinal ribs 3 is met;
ninthly, positioning the crane and carrying out first trial hoisting:
7.1, placing a crane in place:
1) determining the type and the operation position of the crane according to the field condition and the calculation result, and drawing a plane layout diagram of the truck crane field;
2) accurately positioning the truck crane according to a truck crane plane layout drawing, keeping the distance between the truck crane head and a building or an existing tower crane, and meeting the requirement of the truck crane turning radius;
7.2, first trial hoisting:
1) connecting the hoisting ring 1 and an automobile crane hook by using a steel wire rope determined by checking calculation, and firmly hanging the steel wire rope on the hook;
2) the hoisting process comprises the following steps of 1, trial hoisting for the first time, and enabling the hoisting ring 1 to be stretched to a stressed state;
eighthly, binding the cable wind rope 7 and the cutting frame column 4:
8.1, binding cable rope 7:
the four sides of the frame column 4 are respectively bound with a guy rope 7 to prevent the frame column 4 from rotating after being lifted;
8.2, cutting the frame column 4:
1) when the truck crane and the hoisting ring 1 are in a stretching stress state, all longitudinal bars 3 at the bottom of the frame column 4 are cut off;
2) after 4 cable wind ropes 7 bound at the bottom of the frame column 4 in advance are tensioned, core concrete in a steel bar cutting area at the bottom of the frame column 4 is removed by a pneumatic pick, so that the frame column 4 is in a hoisting state;
ninthly, hoisting the test crane and the frame column 4 for the second time:
9.1, second test hoisting:
carrying out secondary trial hoisting on the cut frame column 4, and carrying out formal hoisting after safety is ensured;
9.2, hoisting the frame column 4:
1) in the hoisting process of the frame column 4, hoisting commanders unify whistle commands and control cable wind ropes 7 on four sides to prevent the distortion stress of the hoisting ring 1 caused by the rotation of the frame column 4 in hoisting;
2) in the hoisting process of the frame column 4, personnel movement is strictly prohibited under the automobile hoisting arm.
And in the first step, the hoisting ring is made of steel bars matched with the grade of the longitudinal bars of the frame column to be dismantled. And in the third step, the safety coefficient of the steel wire rope is 4-8. In the fourth step, the thickness of a steel backing plate paved at the bottom of the movable scaffold is 15-20 mm; the height of the concrete on the top of the frame column chiseled by the pneumatic pick is 100 mm-150 mm. And in the seventh step, the distance between the head of the truck crane and the building or the existing tower crane is more than or equal to 3 m. And seventhly, winding the steel wire rope for 2 circles around the hanging ring, and firmly hanging the steel wire rope on an automobile crane hook. And step seven, binding a cable rope on four sides of the position about 1/5-1/6 at the bottom of the full height of the frame column respectively. And step nine, lifting the cut frame column to a height of 100-200 mm from the floor, standing for 4-8 min, and carrying out formal lifting after safety is ensured.
Claims (10)
1. A construction method for integrally hoisting and dismantling a high-altitude frame column is characterized by comprising the following steps:
firstly, checking and calculating the bearing capacity of the lifting ring:
1.1, checking and calculating:
according to the specification of 'concrete structure design Specification' 9.7.6 and by combining engineering practice, the lifting rings are made of steel bars matched with the grades of longitudinal bars of a frame column to be dismantled, and under the action of the dead weight standard value of the frame column, the design value f of the tensile stress of the steel bars, calculated according to 2 sections, of each lifting ring is determinedd；
1.2, checking and calculating the bearing capacity of the lifting ring:
1) the tension of a single lifting ring is calculated according to the following formula:
2) the minimum diameter of the hanging ring is calculated according to the following formula:
in the above formula: g is the weight of the frame column in kg; n is the number of the hoisting rings; g-weightTaking the force acceleration of 10N/kg; f. ofdDesign value of tensile stress of hoisting ring in N/mm2；
II, checking and calculating the anti-pulling bearing capacity of the longitudinal ribs of the frame column:
2.1, checking and calculating:
when the frame column is too high, the longitudinal bars of the frame column need to be connected and lengthened, and when the connection position of the steel bars is located at the position of the frame column 1/3, the connection position is the most unfavorable, so that 1/3 of the height of the frame column is selected as the effective bonding length of the lifting ring for connecting the longitudinal bars;
2.2, checking and calculating the anti-pulling bearing capacity of the longitudinal ribs of the frame column:
1) calculating the uplift bearing capacity of a single longitudinal rib of the frame column: fb＝Aft＝ahft
2) And (3) checking and calculating the uplift bearing capacity of all the longitudinal bars of the frame column connected with the hoisting ring: fb′＝2n
3) And (3) judging the result of checking and calculating the uplift bearing capacity of the longitudinal ribs of the frame column: fbWhen the tensile strength is greater than or equal to G multiplied by G, the pulling resistance bearing capacity of the longitudinal ribs of the frame column meets the requirement; fbWhen the tensile strength is less than G multiplied by G, the pulling resistance bearing capacity of the longitudinal ribs of the frame column can not meet the requirement;
in the above formula: effective contact area of A-frame column longitudinal bar and concrete in unit mm2(ii) a a, the circumference of a single longitudinal rib connected with a hanging ring is in unit mm; h, the effective bonding length of a single longitudinal rib connected with the hanging ring is unit mm; f. oftDesign value of axial tensile strength of concrete in N/mm2；
Thirdly, checking and calculating the bearing capacity of the hoisting ring and the automobile lifting hook binding steel wire rope:
3.1, counting the weight of all frame columns to be dismantled, and then determining the maximum axial force F to be borne by the steel wire ropes；
3.2 according to the breaking tension of the steel wire rope not less than the maximum axial force FsSelecting a steel wire rope with a proper specification according to the standard of general purpose steel wire ropes on the principle of multiplying the safety factor;
fourthly, removing concrete at the top of the frame column:
1) erecting a movable scaffold, and paving a steel backing plate at the bottom of the scaffold body;
2) chiseling off concrete at the top of the frame column to expose the stirrups and the longitudinal bars;
fifthly, welding a hanging ring:
1) the hoisting ring and the corresponding longitudinal bar axis of the frame column are welded firmly by gas shielded welding, and the welding seam meets the requirement of a secondary welding seam;
2) after welding, detecting at least 3 craters by adopting ultrasonic flaw detection, and performing the next construction after meeting the requirements of a second-level weld joint;
sixth, frame column bottom concrete is eliminated:
removing concrete around the bottom of the frame column, and exposing all longitudinal bars to meet the requirement of cutting the steel bars;
seventhly, positioning the crane and carrying out first trial hoisting:
7.1, placing a crane in place:
1) determining the type and the operation position of the crane according to the field condition and the calculation result, and drawing a plane layout diagram of the truck crane field;
2) accurately positioning the truck crane according to a truck crane plane layout drawing, keeping the distance between the truck crane head and a building or an existing tower crane, and meeting the requirement of the truck crane turning radius;
7.2, first trial hoisting:
1) connecting a lifting ring and an automobile crane lifting hook by using a steel wire rope determined by checking calculation, and firmly hanging the steel wire rope on the lifting hook;
2) the first trial hoisting is carried out, so that the hoisting ring is stretched to a stressed state;
eighthly, binding the cable wind rope and cutting the frame column:
8.1, binding a cable wind rope:
binding a cable rope on four sides of the frame column respectively to prevent the frame column from rotating after being lifted;
8.2, cutting the frame column:
1) when the truck crane and the hoisting ring are in a tensile stress state, all longitudinal bars at the bottom of the frame column are cut off;
2) after 4 cables of the wind ropes bound at the bottom of the frame column in advance are tensioned, removing core concrete in a steel bar cutting area at the bottom of the frame column to enable the frame column to be in a hoisting state;
ninthly, trial hoisting for the second time and hoisting of the frame column:
9.1, second test hoisting:
carrying out secondary trial hoisting on the cut frame column, and carrying out formal hoisting after safety is ensured;
9.2, frame column hoisting:
1) in the process of hoisting the frame column, hoisting commanders unify whistle commands and control cable wind ropes on four sides to prevent the distortion stress of the hoisting ring caused by the rotation of the frame column during hoisting;
2) in the frame column hoisting process, personnel movement is strictly prohibited under the automobile hoisting arm.
2. The integral hoisting and dismantling construction method for the high-altitude frame column as claimed in claim 1, wherein in the first step, the hoisting ring is made of steel bars matched with the grade of longitudinal bars of the frame column to be dismantled.
3. The integral hoisting and dismantling construction method for the high-altitude frame column according to claim 1 is characterized in that the safety coefficient of the steel wire rope in the third step is 4-8.
4. The integral hoisting and dismantling construction method for the high-altitude frame column according to claim 1, wherein the thickness of the steel backing plate paved at the bottom of the movable scaffold in the fourth step is 15-20 mm; the height of the concrete on the top of the frame column chiseled by the pneumatic pick is 100 mm-150 mm.
5. The integral hoisting and dismantling construction method for the high-altitude frame column according to claim 1, wherein the distance between the head of the truck crane and a building or an existing tower crane in the seventh step is more than or equal to 3 m.
6. The high-altitude frame column integral hoisting dismantling construction method according to claim 1, wherein in the seventh step, the steel wire rope is wound around the hoisting ring for 2 circles and is firmly hung on a truck crane hook.
7. The integral hoisting and dismantling construction method for the high-altitude frame column as claimed in claim 1, wherein in the seventh step, a cable rope is respectively bound to four sides of the position of about 1/5-1/6 at the bottom of the full height of the frame column.
8. The integral hoisting and dismantling construction method for the high-altitude frame column according to claim 1, wherein in the ninth step, the cut frame column is lifted to a height of 100-200 mm from the floor, and is kept still for 4-8 min, and formal hoisting is performed after safety is ensured.
9. The integral hoisting and dismantling construction method for the high-altitude frame column according to claim 1, wherein concrete around the bottom of the frame column is removed in the sixth step.
10. The integral hoisting and dismantling construction method for the high-altitude frame column according to claim 1, wherein core concrete in a steel bar cutting area at the bottom of the frame column is removed in the eighth step.
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| JP2004044223A (en) * | 2002-07-11 | 2004-02-12 | Kajima Corp | Demolition and new construction work method using existing underground building frame |
| JP2012001902A (en) * | 2010-06-14 | 2012-01-05 | Ohbayashi Corp | Demolition method for building |
| CN103291085A (en) * | 2013-06-07 | 2013-09-11 | 陈春来 | Concrete static force cutting dismantling construction method |
| CN109025365A (en) * | 2018-07-30 | 2018-12-18 | 李树平 | A kind of dismounting system and method for skyscraper |
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2020
- 2020-08-14 CN CN202010817151.1A patent/CN111962912B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH668800A5 (en) * | 1985-12-17 | 1989-01-31 | Diaber Ag | Tall chimney demolition mechanism - has annular working platform, travelling on vertical rails on chimney outer wall and fitted with support columns |
| JP2004044223A (en) * | 2002-07-11 | 2004-02-12 | Kajima Corp | Demolition and new construction work method using existing underground building frame |
| JP2012001902A (en) * | 2010-06-14 | 2012-01-05 | Ohbayashi Corp | Demolition method for building |
| CN103291085A (en) * | 2013-06-07 | 2013-09-11 | 陈春来 | Concrete static force cutting dismantling construction method |
| CN109025365A (en) * | 2018-07-30 | 2018-12-18 | 李树平 | A kind of dismounting system and method for skyscraper |
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