CN117166812B - Construction method for reforming protective structure of building curtain wall during tower crane limitation - Google Patents
Construction method for reforming protective structure of building curtain wall during tower crane limitation Download PDFInfo
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- CN117166812B CN117166812B CN202311453471.3A CN202311453471A CN117166812B CN 117166812 B CN117166812 B CN 117166812B CN 202311453471 A CN202311453471 A CN 202311453471A CN 117166812 B CN117166812 B CN 117166812B
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- 238000010276 construction Methods 0.000 title claims abstract description 94
- 230000001681 protective effect Effects 0.000 title claims abstract description 75
- 238000002407 reforming Methods 0.000 title description 5
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 34
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- 238000007599 discharging Methods 0.000 description 6
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Abstract
The invention relates to the field of curtain wall reconstruction engineering in building repair operation, in particular to a construction method for a protective structure for reconstruction of a building curtain wall when a tower crane is limited. The method comprises the following steps: a. and (3) rail crane installation: fixedly arranging a steel frame structure on the outer vertical surface of the building protruding structure, and then installing a track crane on the lower edge of the steel frame structure; b. and (3) material transportation: conveying the outer protective structure unit, the overhanging platform member and the hoisting system into a foundation layer; c. and (3) installing an overhanging platform: a construction hole is formed in the outer vertical surface of the foundation layer, hoisting systems are installed on the left side and the right side of the construction hole, and the overhanging platform is fixed on a building main body below the construction hole; d. and (3) installing an outer protection structure: horizontally transporting the outer protection structure units in the foundation layer to an overhanging platform outside a construction hole, and then installing the outer protection structure units by using a track crane to form an outer protection structure of the curtain wall; and a gap is reserved between the outer protective structure and the outer vertical surface of the building, and the outer protective structure unit is transported upwards from the gap.
Description
Technical Field
The invention relates to the field of curtain wall reconstruction engineering in building repair operation, in particular to a construction method for a protective structure for reconstruction of a building curtain wall when a tower crane is limited.
Background
In the operation that the curtain wall of the outer facade of the building needs to be repaired if the curtain wall of the outer facade is damaged, a protection structure of the outer facade is firstly arranged in the reconstruction and repair construction of the outer facade, and then the curtain wall can be replaced or repaired.
The conventional practice of the facade protection structure is to set the protection structure from the ground, and then gradually and upwards superimpose the protection structure by using a tower crane until the protection structure of the facade is covered.
However, many buildings, especially office buildings, have a large number of curved surfaces and protruding structures for the purpose of aesthetic appearance. If the tower crane is used for constructing the position below the protruding structures, the protruding structures can influence the operation of the tower crane, and even the tower crane cannot be used at all.
And the repair work of the curtain wall sometimes does not need to construct the whole curtain wall of the whole outer facade, and often aims at the damage or the improvement work of a certain number of floors needing to be replaced and improved.
Disclosure of Invention
The invention relates to a construction method for reforming a protective structure of a building curtain wall when a tower crane is limited.
The technical problems to be solved are as follows: under the condition that the operation of the tower crane can be influenced due to the protruding structure on the outer vertical surface of the building, if an outer protection system is arranged in a curtain wall reconstruction area below the protruding structure.
In order to solve the technical problems, the construction method for reforming the protective structure of the building curtain wall when the tower crane is limited adopts the following scheme.
The construction method is used for constructing the outer protective structure of the curtain wall reconstruction area when the tower crane is limited, and is used for constructing the outer protective structure of the curtain wall reconstruction area when the outer facade of the building part needs to be repaired, wherein the building main body is provided with an outwards protruding structure above the curtain wall reconstruction area, and the protruding structure influences the construction of the tower crane on the outer protective structure of the curtain wall reconstruction area; the construction method comprises the following steps:
a. and (3) rail crane installation: fixedly arranging a steel frame structure on the outer vertical surface of the building protruding structure, and then installing a track crane on the lower edge of the steel frame structure;
b. and (3) material transportation: the lowest layer of the outer facade curtain wall reconstruction area is used as a construction foundation layer, and the manufactured outer protection structure unit, overhanging platform components and hoisting systems are conveyed into the foundation layer;
c. and (3) installing an overhanging platform: a construction hole is formed in the outer vertical surface of the foundation layer, then hoisting systems are installed on building main bodies on the left side and the right side of the construction hole, overhanging platforms are installed through the hoisting systems, and the overhanging platforms are fixed on the building main bodies below the construction hole;
d. and (3) installing an outer protection structure: horizontally transporting the outer protection structure units in the foundation layer to an overhanging platform outside a construction hole, and then installing the outer protection structure units by using a track crane to form an outer protection structure of the curtain wall; and a gap is reserved between the outer protective structure and the outer vertical surface of the building, and the outer protective structure unit is transported upwards from the gap.
Preferably, when the width of the overhanging platform is greater than the construction hole, the step c includes the following specific steps:
c-1, installing a hoisting system: mounting left and right cantilever cranes on building main bodies at the left and right sides of an outer vertical surface opening of a building;
c-2, lifting the overhanging platform: the rotary arms of the left cantilever crane and the right cantilever crane rotate inwards of the building, the slings of the two cantilever cranes are connected to the left side and the right side of the cantilever platform, and the cantilever platform is hoisted;
c-3, rotating the overhanging platform: the rotary arm of the cantilever crane on the left side rotates outwards, the rotary arm of the cantilever crane on the right side rotates inwards from the driven part, the whole cantilever platform rotates, and one end of the cantilever platform is aligned with the hole;
c-4, outward movement of the overhanging platform: the rotary arm of the cantilever crane on the left side continuously rotates outwards, and the rotary arm of the cantilever crane on the right side rotates outwards along with the cantilever crane on the left side, so that the whole cantilever platform is moved out of a building hole;
c-5, adjusting the posture of the overhanging platform: rotating the rotary arms of the two cantilever cranes to adjust the posture of the cantilever platform;
c-6, fixing the overhanging platform: the overhanging platform is fixed to the design position of the building facade.
Preferably, step e is also included after step d,
e. setting an operation platform: an operation platform is arranged on the inner side of the outer protection structure;
the outside rotation of operation platform installs on outer protective structure, still sets up the diagonal brace on the operation platform simultaneously, and the diagonal brace below supports on outer protective structure.
Preferably, in the case of step b material transportation construction in which the construction elevator or the elevator of the building itself cannot be used,
a blanking hole is formed in the floor slab above the foundation layer, and the blanking hole vertically penetrates through the building upwards from the foundation layer;
and b, conveying the outer protection structural unit, the overhanging platform member and the hoisting system into the foundation layer by using a tower crane discharging hole during material transportation in the step b.
Preferably, in the installation construction of the track crane in the step a, the steel frame structure and the track crane are transported to the corresponding floors at the bottom of the building protruding structure through the discharging hole.
Preferably, in the process of installing the outer protective structure unit of step d, a support bar is provided on the outer protective structure, the support bar being connected to the building body.
Preferably, cantilever cranes are respectively arranged at the left side and the right side of the building hole, the cantilever cranes comprise mounting seats and rotary arms, the mounting seats are fixed on building upright posts at the left side and the right side of the building hole, the root parts of the rotary arms are rotatably arranged on the mounting seats, and slings for hoisting are further arranged on the rotary arms;
the pitching angle of the revolving arm can be adjusted; the root of the rotary arm is rotationally connected to the mounting seat through a rotary shaft, the rotary shaft is hinged with the rotary arm, and the axis of the rotary shaft is vertically arranged; the building upright post is also provided with a pitching adjusting system for adjusting the pitching angle of the rotary arm;
the pitch adjustment system includes a hoist system with an adjustment cable connected to the swivel arm.
Preferably, in the material transportation in the step b, firstly, the parts of the overhanging platform are transported into the floor where the installation position is located, and then the overhanging platform is assembled and formed in a building.
Compared with the prior art, the construction method for reforming the protective structure of the building curtain wall when the tower crane is limited has the following beneficial effects:
in the repair work of building facades, the construction repair is generally performed only on damaged parts, and the parts needing the construction are often high. In repair operation, an outer protection structure is not arranged on the outer vertical surface of the whole building of a bar generally, and only the outer protection structure is arranged on the outer side of a curtain wall reconstruction area which needs to be replaced, and then construction operation in the curtain wall reconstruction area is carried out.
In the prior art, an outer protection structure is directly hoisted to an outer vertical surface of a curtain wall reconstruction area by using a tower crane or a crane.
However, some special-shaped buildings cannot install the outer protective structure on the curtain wall reconstruction area of the building due to the steel wire ropes of the shielding tower crane of the outer elevation protruding structure.
Therefore, aiming at the problems, when the outer vertical surface of the building part needs to be repaired and constructed, the building main body is provided with a protruding structure protruding outwards above the curtain wall reconstruction area, and the protruding structure influences the construction of the tower crane on the outer protection structure of the curtain wall reconstruction area;
the construction method comprises the following steps:
a. and (3) rail crane installation: fixedly arranging a steel frame structure on the outer vertical surface of the building protruding structure, and then installing a track crane on the lower edge of the steel frame structure;
b. and (3) material transportation: the lowest layer of the outer facade curtain wall reconstruction area is used as a construction foundation layer, and the manufactured outer protection structure unit, overhanging platform components and hoisting systems are conveyed into the foundation layer;
c. and (3) installing an overhanging platform: a construction hole is formed in the outer vertical surface of the foundation layer, then hoisting systems are installed on building main bodies on the left side and the right side of the construction hole, overhanging platforms are installed through the hoisting systems, and the overhanging platforms are fixed on the building main bodies below the construction hole;
d. and (3) installing an outer protection structure: horizontally transporting the outer protection structure units in the foundation layer to an overhanging platform outside a construction hole, and then installing the outer protection structure units by using a track crane to form an outer protection structure of the curtain wall; and a gap is reserved between the outer protective structure and the outer vertical surface of the building, and the outer protective structure unit is transported upwards from the gap.
Through above technical scheme, ingenious utilization building original protruding structure sets up the track and hangs on protruding structure, then carries out outer protective structure's construction with the track.
Meanwhile, in the method, the outer protection structure unit is firstly transported into the building, and particularly the floor corresponding to the lowest part of the curtain wall reconstruction area, namely the foundation layer. In the construction of hoisting by means of a rail crane, it is necessary to transfer the hoisting from the building to the outside of the building. Thus, a construction hole needs to be formed.
And the outer vertical face of the transformation project is already closed, and each construction hole is arranged, so that the hole needs to be filled after the subsequent transformation is finished. Therefore, only the construction hole is formed in the outer vertical face of the foundation layer, all the outer protection structure units are transported outwards from the hole of the foundation layer, and then the outer protection structure units are transported upwards by using the gap between the outer protection structure and the outer vertical face.
The outer protective structure units are sequentially overlapped upwards from bottom to top to finally form an outer protective structure.
Drawings
FIG. 1 is a schematic diagram of a construction method for improving a protective structure of a building curtain wall in the process of installing an outer protective structure in step d in the construction method for improving the protective structure of the building curtain wall when a tower crane is limited;
FIG. 2 is a schematic view of the outer guard structure of FIG. 1 after installation;
FIG. 3 is a schematic diagram during steps c-3 to c-4;
FIG. 4 is a schematic illustration of the c-6 overhanging platform when secured;
fig. 5 is an enlarged view at a in fig. 1.
Reference numerals illustrate:
1-an outer protective structure, 1 a-an outer protective structural unit;
2-overhanging platforms;
3-track crane slings;
4-building main body;
5-curtain wall outer vertical surfaces;
6-an operation platform;
7-diagonal bracing;
8-supporting rods;
9-protection of the protruding structure;
10-rail hanging;
11-cantilever crane, 11 a-mounting seat, 11 b-rotary arm, 11 c-rotating shaft, 11 d-adjusting steel cable and 11 e-sling;
12-construction hole.
Detailed Description
The following describes specific embodiments of the present invention in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
In the present invention, unless otherwise indicated, terms of orientation such as "up, down, left, right" are used to refer generally to up, down, left, right as shown with reference to fig. 1; "inner and outer" means inner and outer relative to the contour of the respective parts themselves. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
In order to solve the problem that the operation of the tower crane can be influenced under the condition that the protruding structure is arranged on the outer vertical face of the building, an outer protection system is arranged in a curtain wall reconstruction area below the protruding structure. As shown in fig. 1-5.
The construction method of the building curtain wall reconstruction protection structure when the tower crane is limited is used for constructing the outer protection structure 1 of the curtain wall reconstruction area when the outer facade of the building part needs to be repaired, wherein the building main body 4 is provided with a protruding structure protruding outwards above the curtain wall reconstruction area, and the protruding structure influences the construction of the tower crane on the outer protection structure 1 of the curtain wall reconstruction area; the construction method comprises the following steps:
a. the track crane 10 is installed: fixedly arranging a steel frame structure on the outer vertical surface of the building protruding structure, and then installing a track crane 10 on the lower edge of the steel frame structure;
b. and (3) material transportation: the lowest layer of the outer facade curtain wall reconstruction area is used as a construction foundation layer, and the manufactured outer protection structure unit 1a, the overhanging platform 2 component and the hoisting system are conveyed into the foundation layer;
c. and (3) mounting the overhanging platform 2: a construction hole 12 is formed in the outer vertical surface of the foundation layer, then hoisting systems are installed on the building main bodies 4 on the left side and the right side of the construction hole 12, the overhanging platform 2 is installed through the hoisting systems, and the overhanging platform 2 is fixed on the building main bodies 4 below the construction hole 12;
d. the outer protective structure 1 is installed: horizontally transporting the outer protection structure unit 1a in the foundation layer to the overhanging platform 2 outside the construction hole 12, and then installing the outer protection structure unit 1a by using the track crane 10 to form an outer protection structure 1 of the curtain wall; and a gap is left between the outer protective structure 1 and the building outer facade, and the outer protective structure unit 1a is transported upwards from the gap.
Through above technical scheme, ingenious utilization is constructed original protruding structure, sets up track crane 10 on protruding structure, then carries out the construction of outer protective structure 1 with the track.
Meanwhile, in the method, the outer protection structure unit 1a is firstly transported into the building, and particularly, the floor corresponding to the lowest part of the curtain wall reconstruction area, namely, the foundation layer. In the construction of hoisting by the rail crane 10, it is necessary to transfer the construction from the building to the outside of the building. Thus requiring the construction opening 12 to be provided.
And the outer facade of the transformation project is already closed, and each construction hole 12 is arranged, so that the hole needs to be filled after the subsequent transformation is finished. Therefore, only the construction hole 12 is formed in the outer vertical surface of the foundation layer, all the outer protective structure units 1a are transported outwards from the hole of the foundation layer, and then the outer protective structure units 1a are transported upwards by using the gap between the outer protective structure 1 and the outer vertical surface.
The outer protective structure units 1a are sequentially overlapped upwards from bottom to top to finally form the outer protective structure 1.
In particular, the height of each unit of the outer protective structure 1 in the prior art is relatively high, and is generally about three meters as high as the building floor. In the present invention, since the outer protective structure unit 1a is required to be transported into the building floor first, and then transported to the overhanging platform 2 again using the construction hole 12. The height of the outer protective structure unit 1a is adapted to the construction hole 12, and the height of the outer protective structure unit 1a is smaller than the height of the construction hole 12. And in order to facilitate the mutual correspondence of the outer protective structure 11 and the storey, the height of the storey should be an integer multiple of the height of the outer protective structure unit 1a. That is, the height of the outer protective structure unit 1a is 1/N (N is a positive integer) of the floor height. The preferred outer protective construction unit 1a has a height of 1/2 of the floor height.
The weight of the outer protective structure 1 is ultimately borne by the overhanging platform 2, so that the overhanging platform 2 is fixed to a structure of the building main body 4, such as a beam-column structure of a building.
If the curtain wall of the protruding structure part of the building also needs to be repaired, the protective structure steel frame structure of the protruding structure position is the same as that in the prior art. The tower crane is directly used for hoisting and mounting on the building main body 4 of the protruding structure part. If the projecting structure portion of the building does not require curtain wall construction, this projecting structure guard 9 is constructed as a steel truss structure secured to the projecting structure portion.
After the new truss cross beam and the track beam components used for the arrangement of the track crane 10 are processed, manufactured and transported to the site, the new truss cross beam and the track beam components are vertically transported to the floor corresponding to the bottom of the protruding structure through a discharging hole by using a tower crane, then transported to the outer side of the steel truss which is arranged in a cantilever mode by using a horizontal transport vehicle, lifting lugs are arranged on the upper chord of the steel truss which is arranged in the cantilever mode to serve as hanging points, the components are horizontally transported to the upper surface of the lower chord of the truss which needs to be arranged from the outer side of the truss by adopting a chain block method, a fully paved 6mm pattern steel plate platform is arranged on the upper surface of the lower chord of the steel frame, and three-proofing cloth is required to be fully paved before the components are placed so as to prevent welding slag during hoisting welding from falling. And then, lifting lugs are arranged at the upper chord position of the truss to serve as lifting points, and the cross beam and the track beam are installed by adopting a chain block.
Before the step d, the pattern steel plate laid on the lower chord of the truss at the lower part of the track crane 10 is required to be removed, and the outer protection structure unit 1a can be lifted and installed after the removal. The laying of the pattern steel plate at the lower part of the original truss is realized by adopting a unit type pattern steel plate which is connected with the lower chord of the truss by using bolts, when the truss is dismantled, the upper chord of the truss is used as a hanging point, a chain block is used for hanging the unit type pattern steel plate so as to ensure the safety of the unit type pattern steel plate after the bolts are removed, then the bolts are removed, the unit type pattern steel plate is horizontally transported to the outer side of the floor truss by using the chain block, and then the unit type pattern steel plate is transported to the floor storage place by using a horizontal vehicle and numbered according to the positions. During installation, the unit pattern steel plate is installed by reverse operation.
During the installation of the outer protective structure unit 1a in step d, a support bar 8 is provided on the outer protective structure 1, the support bar 8 being connected to the building body 4. The support rods 8 are arranged at intervals of two floors, and the support rods 8 are arranged at intervals in the horizontal direction.
The outside rotation of operation platform 6 is installed on outer protective structure 1, still sets up diagonal brace 7 on the operation platform 6 simultaneously, and diagonal brace 7 below supports on outer protective structure 1. Before the outer guard structure unit 1a is mounted, the operation platform 6 is mounted to the outer guard structure unit 1a, and the operation platform 6 is brought into close contact with the inner surface of the outer guard structure unit 1a.
The operation platform 6 adopts a rectangular steel pipe as a cantilever cross rod, and adopts a rectangular steel pipe as an inclined strut 7 to form a triangular bracket. The square tube is connected with the outer protection structure unit 1a by adopting a pin shaft, so that the square tube can be conveniently detached and the position can be changed at any time. A certain distance is reserved between the operation platform 6 and the outer curtain wall, and the distance is not less than 200mm. In order to ensure the stability of the overhanging tripod in the out-of-plane direction, an inclined stay bar 7 is arranged between the overhanging cross bar and the unit frame cross bar, so as to ensure the stability of the operation platform 6. If the overhanging platform 2 has a large overhanging length, the platform can be arranged on the overhanging platform 2 by setting up a scaffold on the inner side of the outer protective structure unit 1a. The load of the scaffold has to be taken into account when designing the platform.
The outer side of the outer protective structure 1 is also fixedly provided with a protective sheet net, which is mounted onto the outer protective structure unit 1a before the outer protective structure unit 1a is mounted in step d.
B, when a construction elevator or a building elevator cannot be used in construction in the step b, all the floor slabs above the foundation layer are provided with blanking holes, and the blanking holes vertically penetrate through the building from the foundation layer upwards; in the step b, material transportation, conveying the outer protection structure unit 1a into a floor of a foundation layer from a discharging hole by using a tower crane; meanwhile, the overhanging platform 2 is also conveyed into the foundation layer through the blanking hole.
In step a, the track crane 10 is installed and constructed, and the track crane 10 is transported to the corresponding floor at the bottom of the protruding structure of the building through the discharging hole. Therefore, the opening of the blanking hole is divided into two steps in sequence, and the first step is as follows: a blanking hole is first opened downwards from the roof of the building to the corresponding floor at the bottom of the protruding structure of the building, and then the track crane 10 etc. is transported to this floor. And a second step of: the blanking hole is continuously opened downwards until reaching the foundation layer.
D, installing an outer protective structure 1, and welding and fixing an outer protective structure unit 1a at the bottom and an overhanging platform 2; the sleeve is reserved at the top of outer protective structure unit 1a, and outer protective structure 1 is provided with the fixed column from top to bottom, adopts the fixed column to add the sheathed tube mode to connect between the outer protective structure unit 1a. Then the sleeve is horizontally penetrated through the opposite-penetrating bolt. Or the bottom of the outer protective structure unit 1a is provided with a plug-in post matched with the sleeve, and the outer protective structure units 1a outside the bottom are inserted into the sleeve of the lower outer protective structure unit 1a for connection by using the plug-in post.
After step d, step e is further included to set the operation platform 6: an operation platform 6 is arranged on the inner side of the outer protective structure 1; the outside rotation of operation platform 6 is installed on outer protective structure 1, still sets up diagonal brace 7 on the operation platform 6 simultaneously, and diagonal brace 7 below supports on outer protective structure 1.
B, under the condition that a construction elevator or a building elevator cannot be used in the material transportation construction in the step, blanking holes are formed in the floor slab above the foundation layer, and the blanking holes vertically penetrate through the building upwards from the foundation layer; and b, during material transportation in the step, conveying the outer protection structural unit 1a, the overhanging platform 2 component and the hoisting system into the foundation layer by using a tower crane discharging hole.
In the installation construction of the track crane 10 in the step a, the steel frame structure and the track crane 10 are transported to the corresponding floors at the bottoms of the building protruding structures through the blanking holes.
During the installation of the outer protective structure unit 1a in step d, a support bar 8 is provided on the outer protective structure 1, the support bar 8 being connected to the building body 4.
When the width of the overhanging platform 2 is greater than the construction hole 12, the step c includes the following specific steps:
c-1, installing a hoisting system: the left and right cantilever cranes 11 are arranged on the building main body 4 at the left and right sides of the building outer vertical surface opening;
c-2, lifting the overhanging platform 2: the rotary arms 11b of the left and right cantilever cranes 11 rotate inwards in the building, the slings 11e of the two cantilever cranes 11 are connected to the left and right sides of the cantilever platform 2, and the cantilever platform 2 is lifted;
c-3, rotating the overhanging platform 2: the rotary arm 11b of the cantilever crane 11 on the left side rotates outwards, the rotary arm 11b of the cantilever crane 11 on the right side rotates inwards, the whole cantilever platform 2 rotates, and one end of the cantilever platform 2 is aligned with the hole;
c-4, outward movement of the overhanging platform 2: the rotary arm 11b of the cantilever crane 11 on the left side continues to rotate outwards, and the rotary arm 11b of the cantilever crane 11 on the right side follows the cantilever crane 11 on the left side to rotate outwards, so that the whole cantilever platform 2 is moved out of a building hole;
c-5, adjusting the posture of the overhanging platform 2: rotating the rotary arms 11b of the two cantilever cranes 11 to adjust the posture of the cantilever platform 2;
c-6, fixing the overhanging platform 2: the overhanging platform 2 is fixed to the design position of the building facade.
In the construction of the step b, the steel structural member of the cantilever platform 2 manufactured by a factory is transported to the site through a transportation truck. Other equipment is then used to transport the components into the building floor. For example, the components may be transported into the building using a tower crane on the unobstructed side of the building, or the components may be transported into the floors of the building using a building elevator or construction elevator. And then assembling, welding and fixing the components in the floors to form a complete overhanging platform 2.
The cantilever crane 11 is fixed on a building steel upright post or a building concrete structure post at the left side and the right side of a building hole. After step 6, an inter-column secondary beam is fixedly installed between the building steel columns or the building concrete structure columns where the two cantilever cranes 11 are located.
The rotation of the two cantilever cranes 11 of the hoisting system is preferably manually driven, so that the structure can be simplified, and the quick installation and the disassembly of the cantilever cranes 11 are facilitated. In the process of steps c-3 to c-5, first the left cantilever crane 11 is active, the right cantilever crane 11 is passive, the left cantilever crane 11 is turned from the inner side of the building to the outer side of the building, in which process the right cantilever crane 11 is first pushed to move in a more inward direction of the building and then pulled by the left cantilever crane 11 to move out of the building. When half of the cantilever platform 2 is conveyed out of the hole, the cantilever crane 11 on the right side is changed into active movement, and the cantilever crane 11 on the left side is changed into driven. The boom 11 on the right rotates outwards and then pushes the boom 11 on the left to continue to rotate outwards. After the overhanging platform 2 is completely positioned outside the building, the cantilever crane 11 on the right side continues to rotate outwards, and the cantilever crane 11 on the left side reversely rotates inwards at the end stage of the step c-5.
The outward rotation and the inward rotation herein mean that the end of the swivel arm 11b of the cantilever crane 11 is moved in a direction away from the building, and then moved outward, and then moved in a direction approaching the building, and then moved inward.
Cantilever crane 11 is set up respectively in the left and right sides of building entrance to a cave, cantilever crane 11 includes mount pad 11a and revolving arm 11b, mount pad 11a is fixed on the building stand of the left and right sides of building entrance to a cave, and the root rotation of revolving arm 11b is installed on mount pad 11a, still sets up the hoist cable 11e that is used for lifting by crane on the revolving arm 11 b. The swing arm 11b is provided with a hoist or a hoist, and then the hoist or the hoist hangs down the slings 11e.
The pitching angle of the rotary arm 11b is adjustable; the root of the rotary arm 11b is rotatably connected to the mounting seat 11a through a rotary shaft 11c, the rotary shaft 11c is hinged with the rotary arm 11b, and the axis of the rotary shaft 11c is vertically arranged; the building upright post is also provided with a pitching angle adjusting system for adjusting the pitching angle of the rotary arm 11 b; the pitch adjustment system includes a hoist system with an adjustment cable 11d connected to a swivel arm 11 b. The preferred hoisting system is a chain block or a hoist. The angle between the swivel arm 11b and the vertical is between 25 deg. -60 deg..
A safety rope is connected between the rotary arm 11b and the building main body 4, one end of the safety rope is connected to the tail end of the rotary arm 11b, and the other end of the safety rope is fixed on the building main body 4.
The above examples are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the design of the present invention.
Claims (8)
1. The construction method of the building curtain wall reconstruction protection structure when the tower crane is limited is used for constructing the outer protection structure (1) of the curtain wall reconstruction area by the construction main body (4) with a protruding structure protruding outwards above the curtain wall reconstruction area when the outer facade of the building part needs to be repaired;
the construction method for the reconstruction protection structure of the building curtain wall when the tower crane is limited is characterized by comprising the following steps of:
a. and (3) installing a track crane (10): a steel frame structure is fixedly arranged on the outer vertical surface of the building protruding structure, and then a track crane (10) is arranged on the lower edge of the steel frame structure;
b. and (3) material transportation: the lowest layer of the outer facade curtain wall reconstruction area is used as a construction foundation layer, and the manufactured outer protection structure unit (1 a), the cantilever platform (2) component and the hoisting system are conveyed into the foundation layer;
c. and (3) installing an overhanging platform (2): a construction hole (12) is formed in the outer vertical surface of the foundation layer, then hoisting systems are installed on building main bodies (4) at the left side and the right side of the construction hole (12), overhanging platforms (2) are installed through the hoisting systems, and the overhanging platforms (2) are fixed on the building main bodies (4) below the construction hole (12);
d. and (3) installing an outer protection structure (1): horizontally transporting an outer protection structure unit (1 a) in a foundation layer to an overhanging platform (2) outside a construction hole (12), and then installing the outer protection structure unit (1 a) by using a track crane (10) to form an outer protection structure (1) of the curtain wall; and a gap is reserved between the outer protective structure (1) and the outer vertical surface of the building, and the outer protective structure unit (1 a) is transported upwards from the gap.
2. The construction method for the reconstruction protection structure of the building curtain wall under the condition of limited tower crane according to claim 1, wherein when the width of the overhanging platform (2) is larger than the construction hole (12), the step c comprises the following specific steps:
c-1, installing a hoisting system: a left cantilever crane (11) and a right cantilever crane (11) are arranged on a building main body (4) at the left side and the right side of a building facade construction hole (12);
c-2, lifting the overhanging platform (2): the rotary arms (11 b) of the left cantilever crane (11) and the right cantilever crane (11) rotate inwards in the building, the slings (11 e) of the two cantilever cranes (11) are connected to the left side and the right side of the cantilever platform (2), and the cantilever platform (2) is hoisted;
c-3, rotating the overhanging platform (2): the rotary arm (11 b) of the cantilever crane (11) on the left side rotates outwards, the rotary arm (11 b) of the cantilever crane (11) on the right side rotates inwards from the motion, the whole cantilever platform (2) rotates, and one end of the cantilever platform (2) is aligned with a construction hole;
c-4, outward moving of the overhanging platform (2): the rotary arm (11 b) of the cantilever crane (11) at the left side continuously rotates outwards, and the rotary arm (11 b) of the cantilever crane (11) at the right side rotates outwards along with the cantilever crane (11) at the left side, so that the whole cantilever platform (2) is moved out of the construction hole (12);
c-5, adjusting the posture of the overhanging platform (2): rotating the rotary arms (11 b) of the two cantilever cranes (11) to adjust the posture of the cantilever platform (2);
c-6, fixing the overhanging platform (2): the overhanging platform (2) is fixed to the design position of the building facade.
3. The construction method for the reconstruction and protection structure of the curtain wall of the building under the limitation of the tower crane according to claim 1, wherein the construction method further comprises the step e after the step d,
e. setting an operation platform (6): an operation platform (6) is arranged on the inner side of the outer protection structure (1);
the outside rotation of operation platform (6) is installed on outer protective structure (1), still sets up diagonal brace (7) on operation platform (6) simultaneously, and diagonal brace (7) below supports on outer protective structure (1).
4. The construction method for the curtain wall reconstruction protection structure for the building under the limitation of the tower crane according to claim 1, wherein in the condition that a construction elevator or an elevator of the building itself cannot be used in the material transportation construction in the step b,
a blanking hole is formed in the floor slab above the foundation layer, and the blanking hole vertically penetrates through the building upwards from the foundation layer;
and b, during material transportation in the step, conveying the outer protection structural unit (1 a), the overhanging platform (2) component and the hoisting system into the foundation layer at the position of the blanking hole by using a tower crane.
5. The construction method for the protection structure for the reconstruction of the building curtain wall under the limitation of the tower crane according to claim 4, wherein in the installation construction of the track crane (10) in the step a, the steel frame structure and the track crane (10) are transported to the corresponding floors at the bottom of the protruding structure of the building through the blanking hole.
6. The construction method for the reconstruction and protection structure of the building curtain wall under the condition of limited tower crane according to claim 1, wherein in the installation process of the outer protection structure unit (1 a) in the step d, a supporting rod (8) is arranged on the outer protection structure (1), and the supporting rod (8) is connected to the building main body (4).
7. The construction method for the reconstruction and protection structure of the building curtain wall under the limitation of the tower crane according to claim 2 is characterized in that cantilever cranes (11) are respectively arranged at the left side and the right side of a construction hole,
the cantilever crane (11) comprises a mounting seat (11 a) and a rotary arm (11 b), wherein the mounting seat (11 a) is fixed on building uprights at the left side and the right side of a construction hole (12), the root of the rotary arm (11 b) is rotatably mounted on the mounting seat (11 a), and a sling (11 e) for lifting is further arranged on the rotary arm (11 b);
the pitching angle of the rotary arm (11 b) is adjustable; the root of the rotary arm (11 b) is rotationally connected to the mounting seat (11 a) through a rotary shaft (11 c), the rotary shaft (11 c) is hinged with the rotary arm (11 b), and the axis of the rotary shaft (11 c) is vertically arranged; the building upright post is also provided with a pitching angle adjusting system for adjusting the pitching angle of the rotary arm (11 b);
the pitch adjustment system comprises a hoisting system, and an adjustment cable (11 d) of the hoisting system is connected to the swivel arm (11 b).
8. The construction method for the reconstruction and protection structure of the building curtain wall under the limitation of the tower crane according to claim 1, wherein in the material transportation in the step b, firstly, the parts of the overhanging platform (2) are transported into the floor where the installation position is located, and then the overhanging platform (2) is assembled and formed in the building.
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