CN112227814A - Method for dismantling straight-barrel type concrete tower body - Google Patents
Method for dismantling straight-barrel type concrete tower body Download PDFInfo
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- CN112227814A CN112227814A CN202011053745.6A CN202011053745A CN112227814A CN 112227814 A CN112227814 A CN 112227814A CN 202011053745 A CN202011053745 A CN 202011053745A CN 112227814 A CN112227814 A CN 112227814A
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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
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
- E04H12/348—Arrangements for demolition towers or the like
Abstract
The invention discloses a method for dismantling a straight-barrel type concrete tower body, which comprises the following steps of 1: vertically paying off from top to bottom until the paying off is in conical grounding; step 2: the tower body is dismantled in layers, and hoisting equipment is installed on each layer by drilling; and step 3: a group of scaffolds is installed on each layer of the tower body, the scaffolds are dismantled layer by layer, and the temporary scaffold on the layer is synchronously dismantled after the layer is dismantled, so that the straight cylindrical concrete tower body is gradually dismantled from top to bottom; and 4, step 4: dividing a concrete member of the concrete tower body into blocks, wherein each block of concrete is divided into blocks by 2-2.5 tons; and 5: conveying the cut concrete blocks to the bottom of the tower by using hoisting equipment; step 6: and intensively cleaning the concrete fragments scattered on each layer of scaffold, and transporting to the tower bottom. The method solves the problems that the demolition work of the existing concrete tower mostly adopts a blasting mode, and the blasting demolition mode causes serious environmental pollution.
Description
Technical Field
The invention relates to the technical field of concrete tower body dismantling, in particular to a method for dismantling a straight-tube type concrete tower body.
Background
Concrete is a general term for engineering composite materials in which aggregate is cemented into a whole by a cementing material. The term concrete generally refers to cement as the cementing material and sand and stone as the aggregate; the cement concrete, also called ordinary concrete, is widely used in civil engineering, and has the characteristics of rich raw materials, low price and simple production process, so that the dosage of the concrete is increased more and more. Meanwhile, the concrete also has the characteristics of high compressive strength, good durability, wide strength grade range and the like. The characteristics make the application range of the concrete tower quite wide, the concrete is also an important material in various civil engineering, namely shipbuilding industry, mechanical industry, ocean development, geothermal engineering and the like, the demolition engineering of the domestic concrete tower is visible, most of the demolition engineering adopts a blasting mode, and a non-blasting section-by-section demolition technological mode is rarely used, so that the development of a new demolition technology for reducing the construction cost and improving the engineering progress is necessary.
The existing concrete tower dismantling engineering mostly adopts a blasting mode, the blasting dismantling mode has serious pollution to the environment, and a non-blasting section-by-section dismantling process mode is rarely used, so that a straight-barrel type concrete tower dismantling method is provided.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
The invention also aims to provide a method for dismantling the straight-barrel type concrete tower body, which realizes the effect of dismantling the tower body section by section without blasting, and overcomes the problems that the existing concrete tower dismantling engineering mostly adopts a blasting mode, and the blasting dismantling mode has serious pollution to the environment.
In order to achieve the above objects and other objects, the present invention adopts the following technical solutions:
a method for dismantling a straight-barrel type concrete tower body comprises the following steps:
step 1: vertically paying off from top to bottom until the paying off is in conical grounding;
step 2: the tower body is dismantled in layers, and hoisting equipment is installed on each layer by drilling;
and step 3: a group of scaffolds is installed on each layer of the tower body, the scaffolds are dismantled layer by layer, and the temporary scaffold on the layer is synchronously dismantled after the layer is dismantled, so that the straight cylindrical concrete tower body is gradually dismantled from top to bottom;
and 4, step 4: dividing a concrete member of the concrete tower body into blocks, wherein each block of concrete is divided into blocks by 2-2.5 tons;
and 5: conveying the cut concrete blocks to the bottom of the tower by using hoisting equipment;
step 6: intensively cleaning concrete fragments scattered on each layer of scaffold, and transporting the concrete fragments to the tower bottom;
and 7: the concrete blocks and the cleaned concrete fragments are cleaned by truck loading and transportation.
Preferably, the step 1 tower body paying-off comprises the following steps:
step 1-1: paying off the tower body from top to bottom, and performing the steps 1-1 according to the axis positioning pile and the axis datum line of the external guide: paying off the tower body from top to bottom, constructing and paying off according to the axis positioning pile and an axis datum line led out, driving the axis onto a building by using a theodolite, popping up the axis on the construction layer of the building, and paying off side lines such as columns, walls and the like according to the axis, wherein the number of the layers is the same;
step 1-2: the method comprises the following steps of adopting a part through which a tower surface stay wire can pass, namely one meter away from the axis of a column, drilling a # -shaped auxiliary control axis through a total station or a theodolite, then using the auxiliary control axis to reversely push out the axes of other columns and beams by using a large ruler or a small ruler, wherein the position of the auxiliary control axis of each layer is unchanged, and the auxiliary control axes are transmitted layer by layer;
step 1-3: the elevation marks of each layer are marked on the control auxiliary axis, the elevation of the tower layer floats 200mm downwards, the side faces of the peripheral beams and the paint marks are transmitted to a plurality of main column steel angle bars through the elevation, and the paint marks lay a foundation for subsequently confirming hoisting points and building temporary scaffolds.
Preferably, the step 3 support system installation comprises the following steps:
step 3-1: firstly, erecting a concrete support operation scaffold to a support bottom, and then chiseling and cutting off the concrete support by means of an air compressor;
step 3-2: then hoisting and cutting off part of the concrete support by using a gantry crane; then slag removal and outward transportation are carried out on the slag stones generated by the dismantling;
step 3-3: and after the concrete tower on one layer is dismantled, dismantling the temporary scaffold on the corresponding layer, and then entering the next layer for continuous dismantling.
Preferably, the step 3-1 of erecting the concrete support operation scaffold to the support bottom comprises the following steps:
step 3-1-1: erecting an operation scaffold by adopting a phi 48X3.5 steel pipe under a support to be chiseled, and paving a double-layer straw bag under a concrete support;
step 3-1-2: firstly, erecting an operation scaffold to be flush with the supporting concrete bottom of the concrete tower, then operating the scaffold by using a steel pipe, vertically and horizontally adjusting the vertical rods to be 900mm, then adding a temporary top support at the bottom of the supporting beam, and finally jacking the concrete supporting beam bottom by using the top support steel pipe;
step 3-1-3: then, a floor sweeping rod is arranged at the position 20cm away from the ground by the steel pipe scaffold, then a floor sweeping rod is arranged at the position where the height interval of the horizontal rods is smaller than 1.8m, then 1.0m high protective railings are arranged around the operation scaffold, and finally the floor sweeping rod is arranged at a height of 200mm away from the ground.
Preferably, the step 4 cutting comprises the following steps:
step 4-1: dividing the concrete member into blocks, wherein the size of each block is based on the bearing capacity of the existing floor slab structure, and each concrete block is divided by 2-2.5 tons;
step 4-2: cutting, positioning and paying off are carried out according to the standard, and before each cutting, a hole is drilled and a cutting machine is arranged;
step 4-3: during cutting construction, firstly, the flowing water construction is carried out from the top to the bottom horizontally and then from the left to the right vertically.
Preferably, in the step 3-1-1, square timber is padded under the steel pipe operation scaffold vertical pipe, the cross braces are arranged at three steps, a 1.0m high protection railing and an outer safety basketry are arranged outside the scaffold, two joists and a traction bar are firmly tied by lead wires under the bottom basketry, the two joists are firmly fastened with a cross rod at the lower part of the scaffold basketry, and the binding point of the scaffold basketry and the joists is not less than four points.
Preferably, after the steel pipe operation scaffold is erected in the step 3-5, chiseling the concrete support by using an air compressor, stripping off the main reinforcing steel bars and cutting off the main reinforcing steel bars, then hanging off the cut-off part of the concrete support by using a gantry crane, dismantling the temporary scaffold after the concrete support is completely hung off, installing a group of scaffolds on each layer of the tower body, dismantling the scaffolds in layers, and synchronously dismantling the temporary scaffold on the layer after the layer is dismantled.
Preferably, the hoisting load after the hoisting and cutting in the step 5 is limited to 2-2.5T, the blocking treatment is carried out after the hoisting and the light placing are finished, and the load is stacked on the floor by the removed sundries.
The invention at least comprises the following beneficial effects:
1. the invention relates to a straight cylinder type concrete tower dismantling technology, which is a novel comprehensive dismantling technology and provides technical support for similar projects in terms of project cost, safety and construction progress.
2. According to the invention, the concrete member is divided into a plurality of blocks, the size of each block is based on the bearing capacity of the existing floor structure, the field condition, the hoisting capacity of hoisting equipment, the safety of a supporting roof and the like are combined, the overlarge concrete block and the dynamic load in the construction process influence the floor, so that each block is divided into 2-2.5 tons according to each concrete block, and the problems that severe shock waves generated at the moment of falling down to the ground are likely to damage equipment in the running device if the concrete block is dismantled by adopting an explosion method, and a large amount of generated dust can influence the passing of vehicles on a plasticized road and the lives of residents on two sides of the road are avoided.
3. Hoisting should be slowly and lightly carried out to avoid impact damage to the floor slab, and the load of the removed sundries stacked on the floor slab should not be larger than the actual bearing load capacity of the floor slab; for guaranteeing hoist and mount safety, the hoist and mount load thing restriction after the cutting is at 2 ~ 2.5T, and the hoist and mount is gently put and is carried out the blocking after finishing and handle, and every piece of concrete member that is cut all is the operation under the safe prerequisite to accomplish, and for guaranteeing to demolish safety when machinery is demolishd, the hoist and mount point should be firm, and the support system can bear and demolish hoisting structure load to make the work of hoist and mount downward clearance concrete piece safe and stable more.
4. The steel pipe operation scaffold is erected on the surface of a structural roof plate, square timber is arranged below a vertical pipe of the steel pipe operation scaffold, cross braces are arranged at three steps to ensure the uniform stress and stability of the bottom of the scaffold, and a 1.0m high protective railing and an outer paving safety fence are arranged on the outer side of the scaffold. Two joists are additionally arranged below the bottom basketry and are firmly tied with the pulling bar by lead wires, the two joists are firmly buckled with the cross bar at the lower part of the scaffold basketry, the scaffold basketry is bound with the joists, and the binding point of each basketry is not less than four points, so that the structure of each layer of scaffold is more stable, and the subsequent dismantling of the scaffold is facilitated.
Drawings
FIG. 1 is a flow chart of a method for dismantling a straight tubular concrete tower provided by the present invention;
FIG. 2 is a flow chart of a tower paying-off process of a method for dismantling a straight-tube concrete tower provided by the present invention;
FIG. 3 is a flow chart of a support system installation process for a method of demolishing a spar-type concrete tower provided by the present invention;
FIG. 4 is a flow chart of concrete support operation scaffold erection to support underflow in the method for dismantling a cylindrical concrete tower according to the present invention;
fig. 5 is a cutting flow chart of the method for removing the straight-tube type concrete tower provided by the invention.
Detailed Description
The present invention is described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description.
As shown in fig. 1 to 5, a method for dismantling a straight-tube type concrete tower body includes the following steps:
step 1: vertically paying off from top to bottom until the paying off is in conical grounding;
step 2: the tower body is dismantled in layers, and hoisting equipment is installed on each layer by drilling;
and step 3: a group of scaffolds is installed on each layer of the tower body, the scaffolds are dismantled layer by layer, and the temporary scaffold on the layer is synchronously dismantled after the layer is dismantled, so that the straight cylindrical concrete tower body is gradually dismantled from top to bottom;
and 4, step 4: dividing a concrete member of the concrete tower body into blocks, wherein each block of concrete is divided into blocks by 2-2.5 tons;
and 5: conveying the cut concrete blocks to the bottom of the tower by using hoisting equipment;
step 6: intensively cleaning concrete fragments scattered on each layer of scaffold, and transporting the concrete fragments to the tower bottom;
and 7: the concrete blocks and the cleaned concrete fragments are cleaned by truck loading and transportation.
In a preferred scheme, the step 1 tower body paying-off method comprises the following steps:
step 1-1: paying off the tower body from top to bottom, constructing and paying off according to the axis positioning pile and an axis datum line led out, driving the axis onto a building by using a theodolite, popping up the axis on the construction layer of the building, and paying off side lines such as columns, walls and the like according to the axis, wherein the number of the layers is the same;
step 1-2: the method comprises the following steps of adopting a part through which a tower surface stay wire can pass, namely one meter away from the axis of a column, drilling a # -shaped auxiliary control axis through a total station or a theodolite, then using the auxiliary control axis to reversely push out the axes of other columns and beams by using a large ruler or a small ruler, wherein the position of the auxiliary control axis of each layer is unchanged, and the auxiliary control axes are transmitted layer by layer;
step 1-3: the elevation marks of each layer are marked on the control auxiliary axis, the elevation of the tower layer floats 200mm downwards, the side faces of the peripheral beams and the paint marks are transmitted to a plurality of main column steel angle bars through the elevation, and the paint marks lay a foundation for subsequently confirming hoisting points and building temporary scaffolds.
In a preferred embodiment, the step 3 of installing the support system comprises the following steps:
step 3-1: firstly, erecting a concrete support operation scaffold to a support bottom, and then chiseling and cutting off the concrete support by means of an air compressor;
step 3-2: then hoisting and cutting off part of the concrete support by using a gantry crane; then slag removal and outward transportation are carried out on the slag stones generated by the dismantling;
step 3-3: and after the concrete tower on one layer is dismantled, dismantling the temporary scaffold on the corresponding layer, and then entering the next layer for continuous dismantling.
In a preferred embodiment, the step 3-1 of erecting the concrete support operation scaffold to the support bottom comprises the following steps:
step 3-1-1: erecting an operation scaffold by adopting a phi 48X3.5 steel pipe under a support to be chiseled, and paving a double-layer straw bag under a concrete support;
step 3-1-2: firstly, erecting an operation scaffold to be flush with the supporting concrete bottom of the concrete tower, then operating the scaffold by using a steel pipe, vertically and horizontally adjusting the vertical rods to be 900mm, then adding a temporary top support at the bottom of the supporting beam, and finally jacking the concrete supporting beam bottom by using the top support steel pipe;
step 3-1-3: then, a floor sweeping rod is arranged at the position 20cm away from the ground by the steel pipe scaffold, then a floor sweeping rod is arranged at the position where the height interval of the horizontal rods is smaller than 1.8m, then 1.0m high protective railings are arranged around the operation scaffold, and finally the floor sweeping rod is arranged at a height of 200mm away from the ground.
In a preferred embodiment, the step 4 cutting comprises the following steps:
step 4-1: dividing the concrete member into blocks, wherein the size of each block is based on the bearing capacity of the existing floor slab structure, and each concrete block is divided by 2-2.5 tons;
step 4-2: cutting, positioning and paying off are carried out according to the standard, and before each cutting, a hole is drilled and a cutting machine is arranged;
step 4-3: during cutting construction, firstly, the flowing water construction is carried out from the top to the bottom horizontally and then from the left to the right vertically.
In a preferable scheme, square timber is padded under the steel pipe operation scaffold vertical pipe in the step 3-1-1, cross braces are arranged at three steps every so as to ensure the even stress and stability of the bottom of the scaffold, and a 1.0m high protective railing and an outer paving safety fence are arranged on the outer side of the scaffold. Two joists are firmly tied with the pulling bar by lead wires under the bottom basketry, two joists are firmly buckled with the cross bar under the scaffold basketry, and the scaffold basketry is tied with the joists, wherein the tying point of each basketry is not less than four points.
In a preferable scheme, after the steel pipe operation scaffold is erected in the step 3-5, chiseling the concrete support by using an air compressor, stripping off the main reinforcing steel bars and cutting off the main reinforcing steel bars, then hanging off the cut-off part of the concrete support by using a gantry crane, dismantling the temporary scaffold after the concrete support is completely hung off, installing a group of scaffolds on each layer of the tower body, dismantling the scaffolds in layers, and synchronously dismantling the temporary scaffold 2 on the layer after the layer is dismantled.
In a preferable scheme, the hoisting load after the hoisting and cutting in the step 5 is limited to 2-2.5T, the hoisting is performed in a blocking mode after the hoisting is finished, and the load is stacked on the floor by the removed sundries.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. A method for dismantling a straight-barrel type concrete tower body is characterized by comprising the following steps:
step 1: vertically paying off from top to bottom until the paying off is in conical grounding;
step 2: the tower body is dismantled in layers, and hoisting equipment is installed on each layer by drilling;
and step 3: a group of scaffolds is installed on each layer of the tower body, the scaffolds are dismantled layer by layer, and the temporary scaffold on the layer is synchronously dismantled after the layer is dismantled, so that the straight cylindrical concrete tower body is gradually dismantled from top to bottom;
and 4, step 4: dividing a concrete member of the concrete tower body into blocks, wherein each block of concrete is divided into blocks by 2-2.5 tons;
and 5: conveying the cut concrete blocks to the bottom of the tower by using hoisting equipment;
step 6: intensively cleaning concrete fragments scattered on each layer of scaffold, and transporting the concrete fragments to the tower bottom;
and 7: the concrete blocks and the cleaned concrete fragments are cleaned by truck loading and transportation.
2. A method of demolishing a spar type concrete tower according to claim 1, wherein said step 1 tower payoff comprises the steps of:
step 1-1: paying off the tower body from top to bottom, constructing and paying off according to the axis positioning pile and an axis datum line led out, driving the axis onto a building by using a theodolite, popping up the axis on the construction layer of the building, and paying off side lines such as columns, walls and the like according to the axis, wherein the number of the layers is the same;
step 1-2: the method comprises the following steps of adopting a part through which a tower surface stay wire can pass, namely one meter away from the axis of a column, drilling a # -shaped auxiliary control axis through a total station or a theodolite, then using the auxiliary control axis to reversely push out the axes of other columns and beams by using a large ruler or a small ruler, wherein the position of the auxiliary control axis of each layer is unchanged, and the auxiliary control axes are transmitted layer by layer;
step 1-3: the elevation marks of each layer are marked on the control auxiliary axis, the elevation of the tower layer floats 200mm downwards, the side faces of the peripheral beams and the paint marks are transmitted to a plurality of main column steel angle bars through the elevation, and the paint marks lay a foundation for subsequently confirming hoisting points and building temporary scaffolds.
3. A method of demolishing a spar type concrete tower as recited in claim 1, wherein said step 3 support system installation comprises the steps of:
step 3-1: firstly, erecting a concrete support operation scaffold to a support bottom, and then chiseling and cutting off the concrete support by means of an air compressor;
step 3-2: then hoisting and cutting off part of the concrete support by using a gantry crane; then slag removal and outward transportation are carried out on the slag stones generated by the dismantling;
step 3-3: and after the concrete tower on one layer is dismantled, dismantling the temporary scaffold on the corresponding layer, and then entering the next layer for continuous dismantling.
4. A method of demolishing a spar type concrete tower according to claim 2, wherein said step 3-1 of erecting a concrete support handling scaffold to a support base comprises the steps of:
step 3-1-1: erecting an operation scaffold by adopting a phi 48X3.5 steel pipe under a support to be chiseled, and paving a double-layer straw bag under a concrete support;
step 3-1-2: firstly, erecting an operation scaffold to be flush with the supporting concrete bottom of the concrete tower, then operating the scaffold by using a steel pipe, vertically and horizontally adjusting the vertical rods to be 900mm, then adding a temporary top support at the bottom of the supporting beam, and finally jacking the concrete supporting beam bottom by using the top support steel pipe;
step 3-1-3: then, a floor sweeping rod is arranged at the position 20cm away from the ground by the steel pipe scaffold, then a floor sweeping rod is arranged at the position where the height interval of the horizontal rods is smaller than 1.8m, then 1.0m high protective railings are arranged around the operation scaffold, and finally the floor sweeping rod is arranged at a height of 200mm away from the ground.
5. A method of demolishing a spar type concrete tower as recited in claim 1, wherein said step 4 cutting comprises the steps of:
step 4-1: dividing the concrete member into blocks, wherein the size of each block is based on the bearing capacity of the existing floor slab structure, and each concrete block is divided by 2-2.5 tons;
step 4-2: cutting, positioning and paying off are carried out according to the standard, and before each cutting, a hole is drilled and a cutting machine is arranged;
step 4-3: during cutting construction, firstly, the flowing water construction is carried out from the top to the bottom horizontally and then from the left to the right vertically.
6. The method for demolishing a straight tubular concrete tower according to claim 3, wherein in step 3-1-1, square timber is laid under a steel pipe operation scaffold vertical pipe, a cross brace is arranged at three steps, a 1.0m high guard rail and an outer safety basketry are arranged outside the scaffold, two joists are additionally arranged under the bottom basketry and are firmly tied with a pulling bar by lead wires, two joists are arranged under the scaffold basketry and are firmly buckled with a cross bar, and the scaffold basketry is tied with the joists, wherein the tying point of each basketry is not less than four.
7. The method for dismantling the straight-tube type concrete tower body according to claim 2, wherein after the steel tube operation scaffold is erected in step 3-1, an air compressor is used for chiseling the concrete support, main reinforcing steel bars are stripped and cut off, then a gantry crane is used for hoisting the cut-off part of the concrete support, after the concrete support is completely hoisted out, the temporary scaffold is dismantled, a group of scaffolds is installed on each layer of the tower body, the dismantling is carried out in a layered manner, and the temporary scaffold on the layer is synchronously dismantled after the layer is dismantled.
8. The method for dismantling the cylindrical concrete tower body according to claim 2, wherein the hoisting load after the hoisting and cutting in the step 5 is limited to 2-2.5T, the blocking treatment is performed after the hoisting is finished, and the load is piled on the floor by the dismantled sundries.
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| CN115354882A (en) * | 2022-07-15 | 2022-11-18 | 安徽送变电工程有限公司 | Method for dismantling ultra-large spanning old electric tower |
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| CN115354882B (en) * | 2022-07-15 | 2023-08-22 | 安徽送变电工程有限公司 | Method for dismantling ultra-large spanning old electric tower |
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| CN112227814B (en) | 2022-04-15 |
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