CN113073855B - Rapid installation process of large-span leaf vein-like steel structure - Google Patents
Rapid installation process of large-span leaf vein-like steel structure Download PDFInfo
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- CN113073855B CN113073855B CN202110265222.6A CN202110265222A CN113073855B CN 113073855 B CN113073855 B CN 113073855B CN 202110265222 A CN202110265222 A CN 202110265222A CN 113073855 B CN113073855 B CN 113073855B
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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
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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
- E04B1/34—Extraordinary structures, e.g. with suspended or cantilever parts supported by masts or tower-like structures enclosing elevators or stairs; Features relating to the elastic stability
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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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
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Abstract
The invention discloses a rapid installation process of a large-span vein-like steel structure, which comprises the following steps: constructing a floor support system, wherein the floor support system comprises at least more than one floor support, and the floor support at least comprises a first support tower and a second support tower; assembling a first arc-shaped steel pipe component group at the position of a first support tower, carrying out point position calibration on the first arc-shaped steel pipe component group to be installed, and fixing the first arc-shaped steel pipe component group to be installed and the first support tower to ensure that the installation error is within 10 mm; assembling a second steel pipe component group at the position of a second support tower, wherein the second steel pipe component group forms a main body of the large-span leaf vein-imitating steel structure; and installing other steel pipe component groups, and gradually dismantling the floor support system after the large-span leaf vein-like steel structure is integrally stressed. The floor tower is combined with the steel pipe inhaul cable to form a good supporting system, the floor area is small, the installation and the removal are convenient, and favorable conditions are created for the rapid assembly of a steel structure.
Description
Technical Field
The invention belongs to the field of building construction, and particularly relates to a rapid installation process of a large-span leaf vein-like steel structure.
Background
Structural bionics is one of the research hotspots of modern structural design, and provides realization possibility for free and agile architectural aesthetics. Designers optimize the theoretical normal form of the traditional structural design by observing biological or physical rules in the nature, and realize a complex and exquisite three-dimensional space structure. For example, the national stadium is a woven structure imitating a bird nest, the national theater is a thin shell structure imitating an eggshell, the national swimming center is a skeleton-supported air membrane structure imitating biological cells, and the like. The aim of the bionic structure design is to realize automatic shape finding and topology optimization of the structure design on the premise of not constraining the space geometric form, and common algorithms comprise a strain energy density method, a dynamic relaxation method and the like.
In recent years, the imitation branch or vein steel structure is more and more favored by designers due to the clear primary and secondary structure. However, this kind of structure often arc member is too much, and the machining precision requires highly to the member is mostly the structure of encorbelmenting, and component self poor stability has brought a lot of difficulties and challenges for site operation in the installation, specifically has following problem:
(1) The main entrance gate is a leaf vein-like growth steel structure system, and vertical or horizontal steel pipes of the main entrance gate are arc-shaped super-long variable cross sections, which puts higher requirements on factory processing and field hoisting of pipes;
(2) The bottom end of the main entrance gate is tightened, the top end of the main entrance gate is opened, the maximum cantilever length is about 30 meters, the minimum cantilever length is about 17.5 meters, the structure is complex in stress, a self-stabilizing condition is not provided, and the assembly construction difficulty of the cantilever of the ultra-long rod piece is extremely high;
(3) The construction area of the main entrance gate is limited, a main construction access is formed between the two tree-shaped steel structures, the ground does not have the condition of fully distributing landing scaffolds, and the reduction of the floor area of the landing support is crucial on the premise of ensuring the stable structure and the feasible hoisting.
Disclosure of Invention
The invention aims to provide a rapid installation process of a large-span leaf vein-like steel structure, a floor tower frame is combined with a steel pipe inhaul cable to form a good support system, the floor area is small, the installation and the removal are convenient, and favorable conditions are created for rapid assembly of the steel structure. In addition, according to actual conditions, a building sequence is creatively given, the construction efficiency is improved, the construction period is saved by 20 days compared with the traditional floor support scheme, and large-scale hoisting equipment is prevented from being selected due to long hoisting distance.
In order to achieve the technical effects, the invention is realized by the following technical scheme.
Quick mounting process of large-span leaf vein-like steel structure includes:
constructing a floor support system, wherein the floor support system comprises at least more than one floor support, and the floor support at least comprises a first support tower and a second support tower;
assembling a first arc-shaped steel pipe component group at the position of a first support tower, carrying out point position calibration on the first arc-shaped steel pipe component group to be installed, and fixing the first arc-shaped steel pipe component group to be installed and the first support tower to ensure that the installation error is within 10 mm;
assembling a second steel pipe component group at the position of a second support tower, wherein the second steel pipe component group forms a main body of the large-span vein-like steel structure;
and installing other steel pipe component groups, and gradually dismantling the floor support system after the large-span leaf vein-like steel structure is integrally stressed. In a preferred embodiment of the present invention, the first support tower is a square support tower, the second support tower is a triangular support tower, and the floor support system further comprises a single steel support. In a preferred embodiment of the invention, the first arc-shaped steel pipe component group is formed by splicing a plurality of arc-shaped steel pipes, and a square support tower is correspondingly arranged at each splicing point; the second steel pipe component group comprises a plurality of arc-shaped steel pipes, the bottom ends of the arc-shaped steel pipes are tightened, the top ends of the arc-shaped steel pipes are opened, and cantilever assembling states are presented.
In a preferred embodiment of the invention, the bottom of the arc-shaped steel pipe in the second steel pipe component group is provided with a limiting groove, the top of the arc-shaped steel pipe is provided with a round hole steel plate, the bottom of the arc-shaped steel pipe is preferentially positioned in the hoisting process, and the top of the arc-shaped steel pipe is connected with the top of the steel pipe pile at the center of the base by using a steel wire rope.
In a preferred embodiment of the invention, the construction process sequence is as follows: the method comprises the steps of firstly installing a square support tower frame, then hoisting a first arc-shaped steel pipe component group to initially form a stable space structure supported at multiple points, then gradually extending and assembling a second steel pipe component group or other steel pipe component groups outwards, and if an isolated cantilever component is difficult to form integral stress, utilizing a triangular tower frame or a single section steel support and assisting the symmetrical pull structure of a steel pipe pile and a steel wire rope at the center of a base to balance.
In a preferred embodiment of the invention, the further construction sequence comprises the following steps:
(1) Installing a square support tower and a steel pipe pile at the center of the base, integrally hoisting a splayed arc-shaped steel pipe, then installing a first-layer axial line side vertical arc-shaped steel pipe, and connecting the first-layer axial line side vertical arc-shaped steel pipe and the splayed arc-shaped steel pipe into a whole;
(2) The vertical arc-shaped steel pipes on the axis side are used as centers and gradually spread outwards, a single steel section support is erected, the vertical arc-shaped steel pipes, the transverse connecting steel pipes and the top layer branch pipes are sequentially installed, and the top layer branch pipes and the splayed arc-shaped steel pipes are connected into a whole;
(3) Erecting a triangular support tower frame, installing the longest vertical arc-shaped steel pipe, symmetrically drawing the first two vertical steel pipes through a steel wire rope at the top of the steel pipe pile at the center of the base, and then installing other branch pipes;
(4) Erecting a triangular support tower frame, installing the rest vertical arc-shaped steel pipes on the first layer, symmetrically drawing the rest four vertical steel pipes on the first layer through steel wire ropes at the top of the steel pipe pile at the center of the base, and then installing other branch pipes;
(5) And mounting other transverse steel pipes and branch pipes, and gradually dismantling the floor support system after the leaf vein-like steel structure forms integral stress. In summary, the technical effects of the present invention are as follows:
among this technical scheme, combining the tower that falls to the ground and steel pipe cable and forming good support system, its area is little, and the installation is demolishd conveniently, has created the advantage for assembling fast of steel construction. In addition, according to actual conditions, a building sequence is creatively given, the construction efficiency is improved, the construction period is saved by 20 days compared with the traditional floor support scheme, and large-scale hoisting equipment is prevented from being selected due to long hoisting distance.
Drawings
FIG. 1 is a perspective view of the monolithic steel structure of the present invention;
FIG. 2 is a perspective view of one of the monolithic steel structures of the present invention;
FIG. 3 is a top view of the monolithic steel structure of the present invention;
FIG. 4 is an assembly view of the splayed curved steel tube of the present invention;
FIGS. 5-10 are complete views of the construction process of the present invention;
FIG. 11 is a labeled illustration of a construction sequence of the present invention;
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Quick mounting process of large-span leaf vein-like steel structure includes: constructing a floor support system, wherein the floor support system comprises at least more than one floor support, and the floor support at least comprises a first support tower and a second support tower; assembling a first arc-shaped steel pipe component group at the position of a first support tower, carrying out point position calibration on the first arc-shaped steel pipe component group to be installed, and fixing the first arc-shaped steel pipe component group to be installed and the first support tower to ensure that the installation error is within 10 mm; assembling a second steel pipe component group at the position of a second support tower, wherein the second steel pipe component group forms a main body of the large-span leaf vein-imitating steel structure; and installing other steel pipe component groups, and gradually detaching the floor support system after the whole large-span vein-like steel structure is stressed.
In order to solve the technical problems described in the background art, a floor support system and an arc-shaped steel pipe component group are adopted for common construction operation, mainly because the steel structure of the invention is mostly an arc-shaped special-shaped component and has a large cantilever length, the steel structure cannot be self-stabilized in the installation process, the steel structure needs to be hoisted by virtue of the floor support, the structure system can be self-stabilized after the steel structure is completed, and at the moment, the floor support needs to be dismantled and is only an auxiliary measure in the construction process.
Example 1
As shown in fig. 1 and 2, the process for rapidly installing the large-span leaf vein-like steel structure comprises the following steps: constructing a floor support system, wherein the floor support system comprises at least more than one floor support, and the floor support at least comprises a first support tower and a second support tower; assembling a first arc-shaped steel pipe component group at the position of a first support tower, carrying out point position calibration on the first arc-shaped steel pipe component group to be installed, and fixing the first arc-shaped steel pipe component group to be installed and the first support tower to ensure that the installation error is within 10 mm; assembling a second steel pipe component group (as shown in figure 1) at the position of a second support tower, wherein the second steel pipe component group forms a main body of the large-span leaf vein-imitating steel structure; and installing other steel pipe component groups, and gradually dismantling the floor support system after the large-span leaf vein-like steel structure is integrally stressed.
As shown in fig. 3, the first support tower is a square support tower, the second support tower is a triangular support tower, and the floor support system further comprises a single section steel support. Furthermore, the first arc-shaped steel pipe component group (as one of the main structures) is formed by splicing a plurality of arc-shaped steel pipes, and a square support tower is correspondingly arranged at each splicing point; the second steel pipe component group comprises a plurality of arc-shaped steel pipes, the bottom ends of the arc-shaped steel pipes are tightened, the top ends of the arc-shaped steel pipes are opened, and cantilever assembling states are presented.
In the work progress, to some difficult constructions, perhaps the less place in construction area, the construction methods of arc steel pipe are as follows: the bottom of the arc-shaped steel pipe is provided with a limiting groove, the top of the arc-shaped steel pipe is provided with a round hole steel plate, the bottom of the arc-shaped steel pipe is preferentially positioned in the hoisting process, and the top of the arc-shaped steel pipe is connected with the top of the steel pipe pile at the center of the base through a steel wire rope.
The construction process sequence is as follows: the method comprises the steps of firstly installing a square support tower frame, then hoisting a first arc-shaped steel pipe component group to initially form a stable space structure supported at multiple points, then gradually extending and assembling a second steel pipe component group or other steel pipe component groups outwards, and if an isolated cantilever component is difficult to form integral stress, utilizing a triangular tower frame or a single section steel support and assisting the symmetrical pull structure of a steel pipe pile and a steel wire rope at the center of a base to balance.
As shown in fig. 4 and 5, the first arc-shaped steel pipe member group is a splayed arc-shaped steel pipe 100, the splayed arc-shaped steel pipe (suspended design) is used as a connecting part of two symmetrical steel structures, and is used as a connecting part of the steel structures and is in a suspended state, so that in the construction process, a square support tower 200 needs to be installed to serve as an installation support system of the splayed arc-shaped steel pipe 100.
Specifically, the installation process of the leaf vein-like steel structure of the main entrance gate comprises the following steps:
(1) As shown in fig. 6, a square support tower frame 200 and a steel pipe pile 300 at the center of a base are installed, a splayed arc-shaped steel pipe 100 is integrally hoisted, and then a first-layer axial line side vertical arc-shaped steel pipe 400 is installed and is connected with the splayed arc-shaped steel pipe into a whole;
(2) As shown in fig. 7, the vertical arc-shaped steel pipes 400 at the axial side are used as centers and gradually spread outwards, a single section steel support 500 is erected, the vertical arc-shaped steel pipes 600, the transverse connecting steel pipes 700 and the top layer branch pipes 800 are sequentially installed, and the top layer branch pipes 800 and the splayed arc-shaped steel pipes 100 are connected into a whole; the other symmetrical structures are assembled in sequence, and then the symmetrical vertical arc-shaped steel pipes 600 are connected with other steel pipes as shown in the figure;
(3) As shown in fig. 8, a triangular support tower frame 900 is erected, the longest vertical arc-shaped steel pipe 1000 is installed, the first two vertical steel pipes (shown as a first vertical steel pipe 1001; a second vertical steel pipe 1002; in this way, the assembled steel structures are dragged by connecting steel wire ropes through a central steel pipe pile to achieve balance of mutual forces), and then other branch pipes are installed; the triangular support tower is mainly used for assisting in supporting the longest vertical arc-shaped steel pipe 1000, large-scale support is not allowed under the field construction condition due to the fact that the integral steel structure is arranged in a suspended mode, the triangular support tower occupies small area, and the integral balance and safety of the steel structure are guaranteed after the main structure of the steel structure is welded;
(4) As shown in fig. 9, a triangular support tower frame is erected, the rest of the first layer of vertical arc-shaped steel pipes are installed, the rest of the first layer of vertical steel pipes (refer to the vertical steel pipes a, b, c and d of fig. 9) are symmetrically pulled and connected through steel wire ropes at the top of the steel pipe pile at the center of the base, and then other branch pipes are installed; wherein the cantilever stress of other arc steel pipes of the steel structure is mainly balanced by the tie of the steel pipe pile at the center of the base;
(5) As shown in figure 10, the rest transverse steel pipes and the rest branch pipes are installed, and after the vein-like steel structure is subjected to overall stress, the floor support system is gradually dismantled.
Example 2 is described in a specific application scenario:
2.1 constructing a construction site environment:
in the concrete construction process, if the soil is soft, the construction site needs to be hardened (also used as a square pavement base layer) before hoisting and hoisting, 15cmC25 reinforced concrete is adopted, and the reinforcing bars are
The spacing is 200mm.
2.2 processing the special-shaped steel pipe (arc steel pipe):
the steel pipe bending adopts a full-automatic numerical control JSW-1000 type bending machine. According to the bending direction, marking a central line on the steel pipe and making a stamping, wherein the central line and the stamping position are on four quadrant points of the circumference of the section of the steel pipe, and then, bending the steel pipes with different specifications is realized by changing equipment dies. The intersecting cutting of the steel pipe connection adopts a linkman automatic flame cutting machine, and the cutting speed is properly adjusted, so that the aims of ensuring the smoothness of the intersecting opening without cutting slag, the starting point and the ending point of the intersecting opening to be closed after cutting are achieved.
2.3 constructing a floor stand structure:
in order to ensure smooth transportation channel and shorten hoisting distance, the floor area of the field floor stand is designed to be reduced as much as possible. For this purpose, the floor stand system comprises three structural forms:
1) A square support tower frame: upright column adopts
Steel pipe, horizontal cross brace and diagonal brace
Steel pipes with spacing of 3000mm, bottom rectangle 3500X 3500mm, top rectangle 2000X 2000mm and tower heightThe length is 18m, and 4 cable wind ropes are configured;
2) Triangular support towers: the vertical column, horizontal cross brace and inclined brace adopt
The distance between horizontal cross braces is 2000mm, the side length of the bottom is 3000mm, the side length of the top is 2000mm, and the height of a tower is 12m;
3) Supporting the single section steel: the center of the base is provided with
The steel pipe pile is provided with other supporting nodes
Steel pipes or H200 steel.
The bottom of the floor support system is welded with steel plates of 360 mm multiplied by 20mm, 6-12M 14 expansion bolts are adopted for anchoring, and the anchoring depth is not less than 80mm.
At the center of the base
The bottom of the steel pipe pile needs to be welded with a stiffening plate, the symmetrical pulling and the balance of the first section of the steel upright post are realized through a steel wire rope, and therefore the top of the steel pipe pile needs to be welded with a cross-shaped reinforced inner support and an ear plate.
The installation process of the vein-like steel structure is characterized in that:
(1) Installing splayed steel pipe components
Firstly, 5 square support towers and 2 steel pipe piles at the center of a base are respectively installed by adopting a 25t truck crane and anchored to take roots through expansion bolts, and especially, cross H200 section steel needs to be welded at the bottom of the steel pipe pile to enhance the anti-overturning capacity of the steel pipe pile when the cable tie is unevenly stressed.
Then, 8 welding pieces were welded to the field jig
The arc steel pipe component is hoisted by 2 25t truck cranes at four points, the component is suspended above the square tower frame during hoisting, and 2 total stations are utilizedThe instrument is used for point position calibration, and installation errors are guaranteed to be within 10 mm. And finally, welding and fixing the splayed arc-shaped steel pipe member and the tower frame and loosening the crane lifting rope.
(2) Installing first-layer steel pipe component
The first-layer vertical steel pipe of the main entrance gate comprises 6 steel pipes
Arc steel pipe (maximum length about 14.6 m) and 2
The arc-shaped steel pipe (the maximum length is about 22.3 meters), and the bottom end of the steel pipe is tightened and the top end of the steel pipe is opened according to the building modeling requirements, so that the steel pipe is in a cantilever assembly state. During hoisting, 2 25t truck cranes are required to hoist at two ends of the component simultaneously, the bottom of the arc-shaped steel pipe is provided with a limiting groove, the top of the arc-shaped steel pipe is provided with a round hole steel plate, the bottom of the arc-shaped steel pipe is preferentially positioned in the hoisting process, and the top of the arc-shaped steel pipe is positioned by adopting a mode of hoisting
The steel wire rope is connected with the top of the steel pipe pile at the center of the base.
After accurate positioning, the bottom of the arc-shaped steel pipe is firmly welded with the foundation embedded steel plate, and the steel wire rope at the top is timely tightened. Wherein the content of the first and second substances,
the arc-shaped steel pipe still needs to be provided with a floor triangular tower frame for auxiliary support due to large dead weight.
The cantilever stress of the first layer of arc-shaped steel pipe is mainly balanced by the drawknot of the steel pipe pile at the center of the base, so that the first layer of vertical steel pipe is symmetrically arranged to ensure that the steel pipe pile is stressed as evenly as possible. In addition, after the vertical arc-shaped steel pipe is installed, the vertical arc-shaped steel pipe should be installed as soon as possible
The transverse connection steel pipe forms space integral stress.
(3) Installing other steel pipe components
The steel pipe members of the main inlet gate are vertically connected by adopting a head semisphere (compared with other head types, the semisphere head has small required thickness under the condition of the same diameter and pressure bearing, the head has small surface area and is material-saving and uniform in stress when the head volume is the same) so as to avoid error accumulation in the installation process of the special-shaped space structure. When other steel pipe components are installed, the stable supporting function of the square tower is fully exerted from the middle shaft side, and the principle of point area and surface and gradual expansion is followed, so that the long-time stay of an isolated cantilever structure is avoided.
The specific installation sequence is shown in fig. 11, wherein the number is the installation sequence of the steel pipe members.
2.4 floor stand removal
And after all the steel pipe joints are welded and the weld joints are detected to be qualified, the floor support system can be orderly detached. When the steel pipe pile foundation is dismantled, a single peripheral section steel support is dismantled, then the triangular and square support towers are dismantled, and finally the steel pipe pile and the steel wire rope in the center of the foundation are dismantled. And in the dismantling process, the settlement and the displacement of the structure are strictly observed, if the settlement and the displacement exceed a safe allowable value, the dismantling operation is immediately stopped, and all steel structures and welding seams are inspected one by one. In addition, the dismantling operation is preferably implemented symmetrically, and at least 2-3 hoisting commands are configured on one crane, so that the permanent steel structure is prevented from being touched during dismantling and hoisting.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. Quick mounting process of leaf vein-like steel construction is imitated to long-span, its characterized in that includes:
constructing a floor support system, wherein the floor support system comprises at least more than one floor support, and the floor support at least comprises a first support tower and a second support tower;
assembling a first arc-shaped steel pipe component group at the position of a first support tower, carrying out point position calibration on the first arc-shaped steel pipe component group to be installed, and fixing the first arc-shaped steel pipe component group to be installed and the first support tower to ensure that the installation error is within 10 mm;
assembling a second steel pipe component group at the position of a second support tower, wherein the second steel pipe component group forms a main body of the large-span vein-like steel structure;
installing other steel pipe component groups, and gradually dismantling the floor support system after the large-span leaf vein-like steel structure is integrally stressed;
when other steel pipe component groups are installed, the steel pipe component groups are gradually unfolded from the side of the middle shaft and from the surface of the point band;
the first support tower adopts a square support tower, the second support tower adopts a triangular support tower, and the floor support system further comprises a single section steel support;
the construction process sequence is as follows: the method comprises the steps of firstly installing a square support tower frame, then hoisting a first arc-shaped steel pipe component group to initially form a stable space structure supported at multiple points, then gradually extending and assembling a second steel pipe component group or other steel pipe component groups outwards, and if an isolated cantilever component is difficult to form integral stress, utilizing a triangular tower frame or a single section steel support and assisting the symmetrical pull structure of a steel pipe pile and a steel wire rope at the center of a base to balance.
2. The rapid installation process of the large-span leaf vein-like steel structure according to claim 1, wherein the first arc-shaped steel pipe component group is formed by splicing a plurality of arc-shaped steel pipes, and a square support tower is correspondingly arranged at each splicing point; the second steel pipe component group comprises a plurality of arc-shaped steel pipes, the bottom ends of the arc-shaped steel pipes are tightened, the top ends of the arc-shaped steel pipes are opened, and cantilever assembling states are presented.
3. The rapid installation process of the large-span leaf vein-like steel structure according to claim 2, wherein the bottom of the arc-shaped steel pipe in the second steel pipe component group is provided with a limiting groove, the top of the arc-shaped steel pipe is provided with a round hole steel plate, the bottom of the arc-shaped steel pipe is preferentially positioned in the hoisting process, and the top of the arc-shaped steel pipe is connected with the top of the steel pipe pile at the center of the base through a steel wire rope.
4. The rapid installation process of the large-span vein-like steel structure according to claim 1, wherein the construction sequence further comprises the following steps:
(1) Installing a square support tower and a steel pipe pile at the center of the base, integrally hoisting a splayed arc-shaped steel pipe, then installing a first-layer axial line side vertical arc-shaped steel pipe, and connecting the first-layer axial line side vertical arc-shaped steel pipe and the splayed arc-shaped steel pipe into a whole;
(2) Gradually expanding outwards by taking the vertical arc-shaped steel pipe at the axis side as a center, erecting a single section steel support, sequentially installing the vertical arc-shaped steel pipe, the transverse connecting steel pipe and the top layer branch pipe, and connecting the top layer branch pipe and the splayed arc-shaped steel pipe into a whole;
(3) Erecting a triangular support tower, installing the longest vertical arc-shaped steel pipe, symmetrically drawing the first two vertical steel pipes through a steel wire rope at the top of the steel pipe pile at the center of the base, and then installing other branch pipes;
(4) Erecting a triangular support tower, installing the rest vertical arc-shaped steel pipes of the first layer, symmetrically drawing the rest four vertical steel pipes of the first layer through steel wire ropes at the top of the steel pipe pile at the center of the base, and then installing other branch pipes;
(5) And installing other transverse steel pipes and branch pipes, and gradually dismantling the floor support system after the vein-like steel structure forms integral stress.
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| CN102168492B (en) * | 2011-03-22 | 2012-06-27 | 东南大学 | Deformation control cantilever mounting method for large-diameter upright annular structure |
| CN103216103A (en) * | 2013-03-14 | 2013-07-24 | 江苏扬州建工建设集团有限公司 | Pre-deformation construction method for mounting oblique-arc-shaped combined steel-structured column of annular roof |
| CN109138446A (en) * | 2018-09-30 | 2019-01-04 | 中建七局第二建筑有限公司 | A kind of Node In Large-span Pipe Truss hanging method |
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| CN113073855A (en) | 2021-07-06 |
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