CN111997191A - Method for installing special-shaped steel structure and method for installing steel net frame structure - Google Patents
Method for installing special-shaped steel structure and method for installing steel net frame structure Download PDFInfo
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- CN111997191A CN111997191A CN202010888642.5A CN202010888642A CN111997191A CN 111997191 A CN111997191 A CN 111997191A CN 202010888642 A CN202010888642 A CN 202010888642A CN 111997191 A CN111997191 A CN 111997191A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/19—Three-dimensional framework structures
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
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Abstract
The invention provides a mounting method of a special-shaped steel structure and a mounting method of a steel truss structure, wherein the mounting method of the special-shaped steel structure comprises the following steps: dividing the special-shaped steel structure into a vertical section, a transition section and a horizontal section from high to low in sequence according to the structural characteristics of the special-shaped steel structure; erecting an operation platform on the outer vertical surface of the tower, and fixing and connecting the parts of the vertical section into a whole by using the operation platform; arranging a plurality of first temporary supports on the ceiling of the skirt house around the tower, and hoisting the transition section to a set installation position; and a plurality of crotch columns are arranged on the roof of the skirt house, and all parts of the horizontal section are assembled by taking the crotch columns as centers and are connected into a whole. According to the construction method, the vertical section, the transition section and the horizontal section are sequentially installed, the tower is used as the center, and the tower is installed from inside to outside, so that the site utilization rate can be greatly improved, and meanwhile, the control of the structural stability is more reasonable.
Description
Technical Field
The invention relates to the technical field of super high-rise steel structure engineering construction, in particular to an installation method of a special-shaped steel structure and an installation method of a steel truss structure.
Background
With the rapid development of the building industry and the continuous refinement of the construction technology, a plurality of steel mesh frame structures with peculiar shapes, hyperbolic shapes, special shapes or cambered surfaces are developed in super high-rise buildings so as to achieve the visual effects of changeable curves, lightness, elegance and great aesthetic feeling. The steel net frame structure is generally gradually extended from the outer vertical surface of the super high-rise tower to a far position of the tower from top to bottom or extended to cover a skirt house around the tower, so as to form a large-space canopy structure or a skirt house roof.
The steel truss structure is chosen the initial section of extension outward and is near along vertical extension and apart from the tower usually, passes through the side direction pull rod with the tower and is connected, and along with steel mesh frame structure outside, downward curve extension, it is more and more far away apart from the tower, and is more and more near apart from ground or below skirt top floor, and the steel truss structure supports through the crotch post that erects on ground and the skirt this moment, and is up to extending to the end. The free-form surface divergent polygonal net rack system can be used as a roof system and a decorative structure and is supported on tower and skirt house structures in a half-pull mode. The irregular following special-shaped combined structure is large in installation difficulty and high in installation precision requirement, and the traditional construction technology cannot meet the construction requirement of the novel structure system.
Disclosure of Invention
The invention aims to provide an installation method of a special-shaped steel structure and an installation method of a steel net rack structure, which can meet the construction requirement of a high-altitude special-shaped steel net rack structure, ensure that the construction quality and precision meet the standard requirement, improve the construction efficiency and reduce the construction measure cost.
In order to achieve the purpose, the invention provides an installation method of a special-shaped steel structure, which comprises the following steps:
the special-shaped steel structure is sequentially divided into a vertical section, a transition section and a horizontal section from high to low according to the structural characteristics of the special-shaped steel structure, the vertical section and the horizontal section are installed in a form of assembling of parts, and the transition section is installed in an integral hoisting mode;
erecting an operation platform on the outer vertical surface of the tower, respectively hoisting and transporting each spare part of the vertical section to the operation platform, and fixing the spare parts of the vertical section on the outer vertical surface of the tower by using the operation platform and connecting the spare parts into a whole;
arranging a plurality of first temporary supports on the top of the skirt house around the tower, hoisting the transition section to a set installation position, connecting one end of the transition section with the bottom end of the vertical section, and placing the other end of the transition section on the first temporary supports;
and a plurality of crotch columns are arranged on the roof of the skirt house, and all parts of the horizontal section are assembled by taking the crotch columns as centers and are connected into a whole.
Optionally, the step of setting up the operation platform on the outer vertical surface of the tower specifically includes:
arranging an overhanging steel beam on a floor corresponding to the installation position of the vertical section on the tower;
and erecting a scaffold on the cantilever steel beam to form an operation platform.
Optionally, a plurality of embedded parts are arranged on the outer vertical surface of the tower along the vertical direction, and the parts of the vertical section are connected with the embedded parts to fix the parts of the vertical section on the outer vertical surface of the tower.
Optionally, the step of installing a plurality of crotch posts on the roof of the skirt house specifically includes:
installing a trunk of the crotch column on the roof of the skirt house;
arranging a plurality of second temporary supports on the roof of the skirt house;
and installing the branches of the branch columns, fixing one ends of the branches on the main trunk, and placing the other ends of the branches on the second temporary support.
Optionally, a plurality of third temporary supports are further arranged below the horizontal section, and the third temporary supports are arranged between adjacent crotch columns and in the outer edge area of the horizontal section.
Optionally, the second temporary support and the third temporary support are both steel pipes, and the diameter of the second temporary support is smaller than that of the third temporary support.
Optionally, the first temporary support is assembled by a plurality of tower crane standard knots.
Optionally, the transition section includes a plurality of two trusses and a plurality of secondary beams, and two adjacent trusses are connected by the secondary beams.
Optionally, the transition section is integrally hoisted by adopting a double-machine hoisting method.
Based on the above, the present invention further provides a method for installing a steel grid structure, which is used for building a steel grid structure above a skirt room around a tower, and comprises:
dividing the steel net rack structure into a plurality of special-shaped steel structures, wherein the projection parts of at least two special-shaped steel structures on the horizontal plane are overlapped;
and sequentially installing a plurality of the special-shaped steel structures according to the principle of low first and high second, wherein the special-shaped steel structures are installed by adopting the installation method of the special-shaped steel structures.
The invention provides an installation method of a special-shaped steel structure and an installation method of a steel mesh frame structure. In addition, the installation method can meet the construction requirements of the high-altitude special-shaped steel grid structure, ensure that the construction quality and precision meet the standard requirements, improve the construction efficiency and reduce the construction measure cost.
Drawings
Fig. 1 is a step diagram of an installation method of a profiled steel structure according to an embodiment of the present invention;
fig. 2 is a schematic view of a profiled steel structure provided in an embodiment of the present invention;
fig. 3 is a schematic view of a vertical section of a profiled steel structure according to an embodiment of the present invention;
FIG. 4 is a schematic view of installation of a transition section of a profiled steel structure according to an embodiment of the present invention;
fig. 5 is a schematic installation diagram of a horizontal section of a profiled steel structure according to an embodiment of the present invention;
wherein the reference numerals are:
10-special-shaped steel structure; 20-tower; 30-skirt house; 40-cantilever steel beams; 41-scaffold; 42-floor; 50-a first temporary support; 60-a second temporary support; 70-a third temporary support;
110-a vertical section; 120-a transition section; 130-horizontal segment.
Detailed Description
The following describes in more detail embodiments of the present invention with reference to the schematic drawings. The advantages and features of the present invention will become more apparent from the following description. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Referring to fig. 1 and fig. 2 to 5, the present embodiment provides a method for installing a profiled steel structure, including:
step S1: according to the structural characteristics of the special-shaped steel structure 10, the special-shaped steel structure 10 is sequentially divided into a vertical section 110, a transition section 120 and a horizontal section 130 from high to low, the vertical section 110 and the horizontal section 130 are installed in a manner of assembling parts, and the transition section 120 is installed in a manner of integral hoisting;
step S2: erecting an operation platform on the outer vertical surface of the tower 20, respectively hoisting each part of the vertical section 110 to the operation platform, and fixing the parts of the vertical section 110 on the outer vertical surface of the tower 20 by using the operation platform and connecting the parts into a whole;
step S3: arranging a plurality of first temporary supports on the roof of the skirt house 30 around the tower 20, hoisting the transition section 120 to a set installation position, connecting one end of the transition section 120 with the bottom end of the vertical section 110, and placing the other end of the transition section 120 on the first temporary supports;
step S4: a plurality of crotch columns are installed on the roof of the skirt house 30, and all parts of the horizontal section 130 are assembled by taking the crotch columns as the center and are connected into a whole.
Specifically, step S1 is executed first, and with reference to fig. 2, the special-shaped steel structure 10 is sequentially divided into a vertical section 110, a transition section 120, and a horizontal section 130 from high to low according to the shape of the special-shaped steel structure 10, and the special-shaped steel structure 10 gradually extends outward from the top down from the outer vertical surface of the super high-rise tower 20 to a far position of the tower 20 or extends to cover the building skirt 30, so as to form a large-space rain shed or a skirt 30 roof. The vertical section 110 refers to a portion of the deformed steel structure 10 that is nearly parallel to the outer facade of the tower 20, and is supported by the tower 20. The transition section 120 refers to a portion connecting the vertical section 110 and the horizontal section 130, and it is understood that the end of the transition section 120 connecting the vertical section 110 is higher than the end of the transition section 120 connecting the horizontal section 130, that is, the vertical section 110 is gently transited to the horizontal section 130. The horizontal section 130 is generally a portion above the skirt 30, and may have an area smaller than the skirt 30 or larger than the skirt 30, which is not limited in the present application.
Then step S2 is executed, the vertical segment 110 is installed first, and due to the construction of the operation platform, the vertical segment 110 can be installed in a manner of assembling parts. And respectively hoisting each part of the vertical section 110 to the operating platform, and fixing the parts of the vertical section 110 on the outer vertical surface of the tower 20 by using the operating platform and connecting the parts into a whole. Referring to fig. 3, the step of building an operation platform on the outer vertical surface of the tower 20 specifically includes:
step S21: arranging an overhanging steel beam 40 on a floor of the tower 20 corresponding to the installation position of the vertical section 110;
step S22: erecting a scaffold 41 on the cantilever steel beam 40 to form an operation platform;
after the step S1 is performed, step S21 is performed to arrange cantilever beams 40 at floors of the tower 20 corresponding to the respective parts installation positions of the vertical section 110. The number and the installation position of the cantilever beams 40 may be determined according to the height of the vertical section 110 and the position of the fixing means. In this embodiment, the number of cantilever beams 40 is 3, and 3 cantilever beams 40 are located on different floors 42.
Then, step S22 is executed, and a scaffold 41 is set up on the cantilever beam 40, where the scaffold 41 can be used as an operation platform for an installer to install and fix the vertical section 110.
In this embodiment, a plurality of embedded parts are vertically arranged on the outer vertical surface of the tower 20, and the parts of the vertical section 110 are connected with the embedded parts to fix the parts of the vertical section 110 on the outer vertical surface of the tower 20. It should be understood that, when the tower 20 is constructed, an embedded part is installed at a set position of the outer vertical surface of the tower 20 for connecting the vertical sections 110, and after the vertical sections 110 are lifted to a proper position, the vertical sections 110 are fixed on the outer vertical surface of the tower 20 by means of bolting or welding. Of course, if the embedded part on the main building is missed or has large position deviation, the embedded part can be post-embedded by adopting measures such as a rib, and the fixing of the vertical section 110 can also be realized.
After the vertical section 110 is secured, the scaffolding 41 is removed from the top down. In this embodiment, the parts of the vertical section 110 may be truss structures, such as single trusses, or may be other steel structures, such as rod-assembled diamond-shaped units, which is not limited in this application.
After the step S2 is completed, step S3 is performed to install the transition section 120, which is installed in a form of a large-span integral hoisting because the structural curvature, height and height difference of the transition section 120 are large, so that the supporting measures at the transition section 120 are difficult to set, and the components cannot be installed in a scattered manner.
Referring to fig. 4, first, a plurality of first temporary supports 50 are installed on the top of the skirt house 30 around the tower 20, and the first temporary supports 50 may be installed on the ground or on the top of the skirt house 30, and may be determined according to the construction conditions. In this embodiment, first interim support 50 highly higher can adopt tower crane standard festival to assemble the formation, also can adopt support systems such as lattice column. It should be understood that the scaffold 41 is not generally used for the first temporary support 50, because the scaffold 41 has a great measure, the construction period is long, and the skirt house 30 needs to be structurally reinforced, and the construction steps are complicated.
The transition section 120 can then be hoisted to a set installation position by a crane, and one end of the transition section 120 is connected to the bottom end of the vertical section 110, and the other end of the transition section 120 is positioned on the first temporary support 50. In this embodiment, the transition section 120 includes a plurality of two trusses and a plurality of secondary beams, two adjacent trusses can be connected by a part of the secondary beams before hoisting so as to be integrally hoisted, and the remaining secondary beams between the two trusses are supplemented after being installed in place.
In this embodiment, the transition section 120 is integrally hoisted by using a double-machine hoisting method. Because the two trusses are heavy, the two trusses are hoisted by a double-machine hoisting method so as to ensure the stability of the two trusses in the hoisting process. The double-crane lifting method is a frequently-adopted and very important lifting method, two cranes are used as main cranes for lifting, and the lifting weight of equipment is reasonably distributed between the two cranes, so that the weight born by the two cranes is within the performance range allowed by the respective lifting, and the lifting operation is finished. In this embodiment, the two cranes can respectively lift the two ends of the two trusses for hoisting.
After the step S3, a step S4 is performed to install the horizontal segment 130, and the horizontal segment 130 can be installed in a loose piece assembly manner. Specifically, a plurality of crotch columns are installed on the roof of the skirt house 30, and all parts of the horizontal section 130 are assembled by taking the crotch columns as the center and connected into a whole.
With reference to fig. 5, the step of installing a plurality of crotch posts on the roof of the skirt house 30 specifically includes:
a trunk of the crotch column is installed at the roof of the skirt house 30;
a plurality of second temporary supports 60 are arranged on the roof of the skirt house 30;
and installing the branches of the branch column, fixing one end of each branch on the main trunk, and placing the other end of each branch on the second temporary support 60.
When the fork column is installed, the tail end is difficult to accurately position and install without support, and when the upper component does not form a stable system, lateral stress deformation of the branch is difficult to control under the condition of no temporary support, so that the tail end of the branch can be supported by arranging the second temporary support 60.
In this embodiment, the parts of the horizontal segment 130 may also be a truss structure, such as a single-product truss, or may also be made of other steel structures, such as a rod assembly structure, which is not limited in this application. When the crotch column is taken as the center for assembly, the parts of the horizontal section 130 are sequentially installed from top to bottom, and then the secondary beams are connected with the corresponding parts to connect all the parts into a whole.
Further, a plurality of third temporary supports 70 are arranged below the horizontal section 130, and the third temporary supports 70 are at least partially positioned on the roof of the skirt house 30. In this embodiment, the third temporary supports 70 are used for auxiliary support, because the span between the crotch posts is large, by providing the third temporary supports 70 between the crotch posts and in the outer edge region of the horizontal section 130, better installation of the components of the horizontal section 130 is facilitated.
In this embodiment, the third temporary support 70 may be disposed on the roof of the skirt house 30, or may be disposed on the ground, and may be determined according to the construction environment.
The second temporary support 60 and the third temporary support 70 are both steel pipes, and the diameter of the second temporary support 60 is smaller than that of the third temporary support 70. In this embodiment, the supporting height of the second temporary support 60 is generally less than 10m, and a round pipe with a diameter of 299mm can be used for supporting; the supporting height of the third temporary support 70 is less than 15m and greater than 10m, and a circular tube with the diameter of 609mm can be used for supporting.
It should be understood that the present application is constructed by a reverse construction method from top to bottom, that is, the vertical section 110, the transition section 120 and the horizontal section 130 are installed in sequence, which is opposite to the conventional high-altitude steel structure installation method. And the installation method of the special-shaped steel structure takes the tower 20 as the center, and the installation is carried out from inside to outside, so that the site utilization rate can be greatly improved, and meanwhile, the control of the structural stability in the construction process is more reasonable.
Based on this, this application still provides a steel rack structure's installation method for set up a steel rack structure above the skirt room of a tower periphery, include:
dividing the steel net rack structure into a plurality of special-shaped steel structures, wherein the projection parts of at least two special-shaped steel structures on the horizontal plane are overlapped;
and sequentially installing a plurality of the special-shaped steel structures according to the principle of low first and high second, wherein the special-shaped steel structures are installed by adopting the installation method of the special-shaped steel structures.
Specifically, before the installation of the steel grid structure, finite element analysis software can be adopted to carry out computer simulation on the structural construction process, and the rationality, structural stability and support measures to be taken of the construction process and the construction sequence are analyzed.
Then divide into a plurality of dysmorphism steel construction according to the projection of steel mesh frame structure on the plane, when the plane projection position appears between two adjacent dysmorphism steel construction and overlaps in border department, construct each dysmorphism steel construction in proper order of low first then high, lower first then last.
In conclusion, the invention provides an installation method of a special-shaped steel structure and an installation method of a steel truss structure, the special-shaped steel structure is sequentially divided into a vertical section, a transition section and a horizontal section from high to low according to the structural characteristics of the special-shaped steel structure, and the use amount of construction measures is greatly reduced and the load of a skirt house is reduced by matching the reasonable arrangement and application of temporary supports through a top-down reverse construction method. In addition, use the tower as the center, install from inside to outside, can to a great extent improve the place utilization ratio, simultaneously in the control of structural stability in the work progress, also more reasonable.
The above description is only a preferred embodiment of the present invention, and does not limit the present invention in any way. It will be understood by those skilled in the art that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. The mounting method of the special-shaped steel structure is characterized by comprising the following steps:
the special-shaped steel structure is sequentially divided into a vertical section, a transition section and a horizontal section from high to low according to the structural characteristics of the special-shaped steel structure, the vertical section and the horizontal section are installed in a form of assembling of parts, and the transition section is installed in an integral hoisting mode;
erecting an operation platform on the outer vertical surface of the tower, respectively hoisting and transporting each spare part of the vertical section to the operation platform, and fixing the spare parts of the vertical section on the outer vertical surface of the tower by using the operation platform and connecting the spare parts into a whole;
arranging a plurality of first temporary supports on the top of the skirt house around the tower, hoisting the transition section to a set installation position, connecting one end of the transition section with the bottom end of the vertical section, and placing the other end of the transition section on the first temporary supports;
and a plurality of crotch columns are arranged on the roof of the skirt house, and all parts of the horizontal section are assembled by taking the crotch columns as centers and are connected into a whole.
2. The method for installing the profiled steel structure as claimed in claim 1, wherein the step of erecting the operation platform on the outer vertical surface of the tower specifically includes:
arranging an overhanging steel beam on a floor corresponding to the installation position of the vertical section on the tower;
and erecting a scaffold on the cantilever steel beam to form an operation platform.
3. The method for installing the profiled steel structure as claimed in claim 2, wherein a plurality of embedded parts are vertically arranged on the outer vertical surface of the tower, and the parts of the vertical section are connected with the embedded parts to fix the parts of the vertical section on the outer vertical surface of the tower.
4. The method for installing the special-shaped steel structure as claimed in claim 1, wherein the step of installing the plurality of crotch columns on the top of the skirt building specifically comprises the steps of:
installing a trunk of the crotch column on the roof of the skirt house;
arranging a plurality of second temporary supports on the roof of the skirt house;
and installing the branches of the branch columns, fixing one ends of the branches on the main trunk, and placing the other ends of the branches on the second temporary support.
5. The method for installing the profiled steel structure as claimed in claim 4, wherein a plurality of third temporary supports are further arranged below the horizontal section, and the third temporary supports are arranged between adjacent crotch columns and in the outer edge area of the horizontal section.
6. The method of installing the profiled steel structure as recited in claim 5, wherein the second temporary support and the third temporary support are both steel pipes, and a diameter of the second temporary support is smaller than a diameter of the third temporary support.
7. The method for installing the profiled steel structure as recited in claim 1, wherein the first temporary support is assembled by a plurality of tower crane standard knots.
8. The method for installing the special-shaped steel structure as claimed in claim 1, wherein the transition section comprises a plurality of two trusses and a plurality of secondary beams, and two adjacent trusses are connected through the secondary beams.
9. The method for installing the profiled steel structure as recited in claim 8, wherein the transition section is integrally hoisted by a double-machine hoisting method.
10. A method for installing a steel grid structure above a skirt room around a tower, comprising:
dividing the steel net rack structure into a plurality of special-shaped steel structures, wherein the projection parts of at least two special-shaped steel structures on the horizontal plane are overlapped;
sequentially installing a plurality of profiled steel structures according to the principle of low first and high second, wherein the profiled steel structures are installed by adopting the installation method of the profiled steel structures as claimed in any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010888642.5A CN111997191B (en) | 2020-08-28 | 2020-08-28 | Method for installing special-shaped steel structure and method for installing steel net frame structure |
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| CN202010888642.5A CN111997191B (en) | 2020-08-28 | 2020-08-28 | Method for installing special-shaped steel structure and method for installing steel net frame structure |
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| CN111997191B CN111997191B (en) | 2021-10-15 |
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