CN113982284A - Installation method of large-span special-shaped steel structure toll booth - Google Patents
Installation method of large-span special-shaped steel structure toll booth Download PDFInfo
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- CN113982284A CN113982284A CN202111263821.0A CN202111263821A CN113982284A CN 113982284 A CN113982284 A CN 113982284A CN 202111263821 A CN202111263821 A CN 202111263821A CN 113982284 A CN113982284 A CN 113982284A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 132
- 239000010959 steel Substances 0.000 title claims abstract description 132
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000009434 installation Methods 0.000 title claims description 15
- 238000010276 construction Methods 0.000 claims abstract description 18
- 238000003466 welding Methods 0.000 claims description 11
- 210000003205 muscle Anatomy 0.000 claims description 6
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000011900 installation process Methods 0.000 abstract description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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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
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
-
- 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
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
-
- 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
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4157—Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head
-
- 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
-
- 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
- E04B1/5806—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile
- E04B1/5812—Connections for building structures in general of bar-shaped building elements with a cross-section having an open profile of substantially I - or H - form
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/11—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with non-parallel upper and lower edges, e.g. roof trusses
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H1/00—Buildings or groups of buildings for dwelling or office purposes; General layout, e.g. modular co-ordination or staggered storeys
- E04H1/12—Small buildings or other erections for limited occupation, erected in the open air or arranged in buildings, e.g. kiosks, waiting shelters for bus stops or for filling stations, roofs for railway platforms, watchmen's huts or dressing cubicles
- E04H1/1205—Small buildings erected in the open air
-
- 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
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2418—Details of bolting
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Mechanical Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention belongs to the technical field of steel structure construction, and particularly relates to a method for installing a large-span deformed steel structure charging shed; and after the closure section is spliced, the closure section is spliced with the support section on the ground, and after the closure section is spliced, the double-machine lifting and hanging closure section is spliced and butted with the support section. The invention relates to a method for installing a large-span special-shaped steel structure toll booth, which is used for deeply designing a structure, splitting the whole toll booth, installing spare and star components on the ground in the installation process, assembling a set of components, and hoisting the components at high altitude to integrally complete the whole structure. The double-arch modeling high-altitude bulk construction technology is researched, the use of a large-tonnage truck crane can be reduced by applying the technology, the influence of cross operation is reduced by two to three small-tonnage truck cranes, and the limited operation field is fully utilized.
Description
Technical Field
The invention belongs to the technical field of steel structure construction, and particularly relates to a method for installing a large-span special-shaped steel structure toll shed.
Background
The steel structure toll booth has the unique advantages of high strength, good plastic toughness and shock resistance, convenience for factory production, mechanical construction and the like, and is widely popularized by rapidly developed highways. The span of a bidirectional 16-lane toll station at a certain highway intersection built by the applicant reaches 40 meters, the maximum mounting height is more than 13 meters, and the total projection area is 4174 square meters. The steel roof is supported by 6 groups of steel vertical frames which are arranged into 3 rows, the whole members of the charging shed are more, the total weight is about 1400T, and the effective connection of the steel vertical frames and the concrete foundation makes the load which is enough to support 1400T difficult. The steel roof is of a special-shaped structure, the hoisting difficulty is high, the deformation of the steel roof needs to be considered in the hoisting process, and the hoisting of the steel roof is a difficult engineering point.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and to provide at least the advantages described later.
In order to achieve the purpose, the invention provides a method for installing a long-span special-shaped steel structure toll booth.
The method specifically comprises the following steps:
s1: after the construction of the bottom plate is finished and before the side mold is not constructed, embedding a main body embedded part;
s2: installing a steel stand, hoisting a steel column and an inclined strut, controlling the axis of the steel column and the three-dimensional coordinate of the column top, connecting the steel column with a main body embedded part, and installing the inclined strut at the column top of the steel column;
s3: installing a steel roof supporting section, namely hoisting a main beam firstly and then hoisting a secondary beam, and controlling the axis of the main beam and the welding of a steel beam;
s4: mounting a steel roof closure section, splicing a jig frame on the ground and adding a connecting rod piece; assembling a main beam after the assembly of the jig frame is finished, and controlling the axis of the main beam and the arc line type of the main beam; assembling the secondary beams, firstly installing the positioning secondary beams to ensure the overall dimension of the closure section, assembling the other secondary beams in the middle, assembling the overhanging secondary beams, and symmetrically applying and welding the overhanging steel beams on the two sides;
s5: after the assembly of the closure segments is completed, removing temporary supports influencing the hoisting;
s6: two cranes synchronously lift a section of folding section to be folded and butted with the support section, the main steel beam butt joint part is welded, and the cranes loosen hooks after the main steel beam is welded;
s7: and finishing the construction of the main steel structure.
Furthermore, the folding section is assembled right below the installation position of the folding section, the main beam position of the folding section assembled on the ground is projected and positioned from the steel beam of the supporting section, the axes are kept consistent, and the elevation relative position relation of the steel beam of the folding section is kept consistent with that of the steel beam of the supporting section.
Furthermore, a hoisting hole or a welding lifting lug is arranged on the upper flange part of the steel beam of the steel roof and is used as a hoisting point, and the distance from the hoisting point to the end head of the steel beam is 1/4 of the total length of the member.
Furthermore, before the steel beam of the steel roof is hoisted, dirt on the surface of the steel beam is cleaned, and the connecting plate and the friction surface which generate the floating rust are derusted before being hoisted.
Furthermore, the folding temperature of the steel roof is controlled to be 15-20 ℃.
Furthermore, when the closure section is hoisted, each crane is connected with four hoisting points, the hoisting points are arranged on the outer main beams, the arc ends of the main beams are tensioned by using steel wire ropes, the middle main beam is tensioned by using a chain block and a lifting hook of the crane, the rigidity of the closure section structure is enhanced, and the downwarping value of the closure section structure is reduced.
Furthermore, the main part built-in fitting includes support, rag bolt, anchor plate, and the support includes the upper and lower two-layer square frame that the angle steel welded into, and rag bolt wears four apex department at the frame, and top, bottom surface set up bolt locking, and concrete structure's horizontal muscle is crossed on the frame and is arranged into the well frame and weld with the peripheral perpendicular muscle of frame, and the anchor plate cover is on rag bolt.
Compared with the prior art, the invention has the advantages that:
the invention relates to a method for installing a large-span special-shaped steel structure toll booth, which is used for deeply designing a structure, splitting the whole toll booth, installing spare and star components on the ground in the installation process, assembling a set of components, and hoisting the components at high altitude to integrally complete the whole structure. The double-arch modeling high-altitude bulk construction technology is researched, the use of a large-tonnage truck crane can be reduced by applying the technology, the influence of cross operation is reduced by two to three small-tonnage truck cranes, and the limited operation field is fully utilized; the technology can be regarded as 'splicing blocks', firstly, the processed components are split on the ground and are preliminarily spliced, namely, the fingers of the left hand, the small arms and the large arms of a person are combined together to form a whole arm, and then the part is assembled with other parts. In the engineering, a steel beam with the span of 40m is split into three sections, and the connecting parts of the columns are respectively welded at high altitude, namely, the steel beam is bulk loaded at high altitude. Nowadays, buildings with complex modeling appearances are more and more, construction cost is reduced as far as possible in a limited construction period and under limited operation conditions, construction accuracy is improved, and continuous exploration can be realized based on the technical scheme.
Drawings
Fig. 1 is a schematic structural diagram of a toll booth.
Fig. 2 is a sectional schematic view of the steel roof.
Fig. 3 is a schematic diagram of the hoisting of the steel stand.
FIG. 4 is a schematic view of the hoisting of the steel roof support section.
Fig. 5 is a schematic view of a ground splicing jig.
FIG. 6 is a schematic view of a closure section of a ground spliced steel roof.
FIG. 7 is a schematic view of hoisting a steel roof closure segment.
Fig. 8 is a schematic view of the completion of the hoisting of the toll booth.
FIG. 9 is a schematic view of the arrangement of hanging points of the steel roof closure segment.
FIG. 10 is a schematic structural view of a main body embedment.
FIG. 11 is a schematic view of the installation of a main body embedment.
In the figure: 1-a steel stand; 2-folding section; 3-a support section; 4-truck crane; 5-steel column; 6-diagonal bracing; 7-main beam A; 8-secondary beam A; 9-a jig frame; 10-main beam B; 11-secondary beam B; 12-a scaffold; 13-foundation bolts; 14-transverse ribs; 15-vertical ribs; 16-chain block; 17-steel wire rope.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 11. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
The invention provides a technical scheme that: as shown in fig. 1 and 2; a method for installing a long-span special-shaped steel structure toll shed comprises the steps of installing steel roofs in a segmented mode after steel vertical frames of the toll shed are installed, dividing the steel roofs into supporting sections and folding sections, splicing the supporting sections on the steel vertical frames, splicing the folding sections on the ground, after the splicing of the folding sections is finished, enabling the folding sections to be folded and butted with the supporting sections through double-machine lifting and hanging, carrying out checking calculation by using MIDASGEN software before hanging, considering the dead weight to be 1.2D, generating instant dynamic load when a truss is hung, and considering the instantaneous dynamic load according to the dynamic load during calculation.
A method for installing a large-span special-shaped steel structure toll booth specifically comprises the following arrangement:
s1: after the construction of the bottom plate is finished and before the side mold is not constructed, embedding a main body embedded part;
s2: as shown in fig. 3; installing a steel stand, hoisting a steel column and an inclined strut, controlling the axis of the steel column and the three-dimensional coordinate of the column top, connecting the steel column with a main body embedded part, and installing the inclined strut at the column top of the steel column;
s3: as shown in fig. 4; installing a steel roof supporting section, namely hoisting a main beam firstly and then hoisting a secondary beam, and controlling the axis of the main beam and the welding of a steel beam;
s4: as shown in fig. 5 and 6; mounting a steel roof closure section, splicing a jig frame on the ground and adding a connecting rod piece; assembling a main beam after the assembly of the jig frame is finished, and controlling the axis of the main beam and the arc line type of the main beam; assembling the secondary beams, firstly installing the positioning secondary beams to ensure the overall dimension of the closure section, assembling the other secondary beams in the middle, assembling the overhanging secondary beams, and symmetrically applying and welding the overhanging steel beams on the two sides;
s5: after the assembly of the closure segments is completed, removing temporary supports influencing the hoisting;
s6: as shown in fig. 7; two cranes synchronously lift a section of folding section to be folded and butted with the support section, the main steel beam butt joint part is welded, and the cranes loosen hooks after the main steel beam is welded;
s7: as shown in fig. 8; and finishing the construction of the main steel structure.
As shown in fig. 10, 11; the main part built-in fitting includes support, rag bolt, anchor plate, and the support includes the upper and lower two-layer square frame that the angle steel welded becomes, and rag bolt wears four apex department at the frame, and top, bottom surface set up bolt locking, and concrete structure's horizontal muscle is crossed on the frame and is arranged into the wallbox and weld with the peripheral perpendicular muscle of frame, and the anchor plate cover is on rag bolt. The allowable error of the main embedded part is strictly controlled, namely the elevation is less than or equal to +/-10 mm, and the horizontal grid is less than or equal to +/-20 mm.
Lofting construction of main body embedded part
(1) Firstly, encrypting the axis and the elevation control points on site according to the original axis control points and the elevation control points, and then measuring and releasing a central cross line and at least two elevation control points of each main body embedded part according to the axis released by a control line;
(2) when the main embedded part is constructed, the position of the main embedded part is kept accurate and cannot be moved randomly; the concrete below the anchor plate needs to be compacted by vibration;
(3) when the size of the anchor plate plane is larger, the proper position of the middle part of the plate surface can be provided with an exhaust hole with the diameter not less than 30 mm; when the anchor plate of the main embedded part is long, the distance between the exhaust holes is preferably 500-1000mm for convenience of concrete compaction;
(4) when the anchor plate surface of the main body embedded part embedded in the concrete member is welded, thin welding rods, small current and layered welding are adopted as much as possible so as to avoid burning the concrete.
Second, steel vertical frame construction
(1) Discharging the longitudinal and transverse axes of each steel column base foundation;
(2) after the measured axis is subjected to ink line snapping, measuring the distance and rechecking the size between the adjacent columns;
(3) after the axis is rechecked, triangular marks are made to serve as a centering basis when the first section of steel column is hoisted in place, the center line and the elevation reference line of the column are marked at two ends of the column, the marks are striking, the elevation control line for installing each column on the ground by taking the top of the column as a reference mark is required to be arranged and marked on at least two surfaces;
(4) when the steel column is hung 200mm above the steel column in position, the machine is stopped stably, and the steel column slowly falls down after aligning bolt holes and cross lines, so that the center lines of four sides of the steel column are aligned with the cross axis of the foundation;
(5) after the steel column is corrected, the foundation bolts are screwed down to tighten the cable rope, the column base sizing block and the column base plate are spot-welded, and then the next procedure construction is carried out; the number of the single steel column is not less than 3, the cable wind ropes are fixed with pre-embedded parts through a hoist on the ground, and the cable wind ropes are arranged on adjacent concrete column reinforcement cages.
Construction of steel roof
The folding sections are assembled under the installation positions of the folding sections, the main beams of the folding sections assembled on the ground are projected and positioned from the steel beams of the supporting sections, the axes are kept consistent, and the elevation relative position relation of the steel beams of the folding sections is kept consistent with that of the steel beams of the supporting sections.
The steel beam upper flange part of the steel roof is provided with a hoisting hole or a welding lifting lug as a hoisting point, and the distance from the hoisting point to the end of the steel beam is 1/4 of the total length of the member; the steel beam upper flange is provided with a stacking plate for installation, and the stacking plate is a steel plate with the thickness of 20mm and the specification of 300mm multiplied by 100 mm. In place, the span spacing is adjusted by the fitting of a punch pin to the joint with a small deviation from the hole, and then tightened with a mounting bolt. The number of the mounting bolts is required to be not less than 30% of the total number of the node bolts according to the specification, and not less than two.
Before the steel beam of the steel roof is hoisted, dirt on the surface of the steel beam is cleaned, and the connecting plate and the friction surface which generate the rust are derusted before being hoisted.
When the steel roof is folded, a proper temperature needs to be selected, and the folding temperature of the steel roof is controlled to be 15-20 ℃.
As shown in fig. 9; when the folding section is hoisted, each crane is connected with four hoisting points, the hoisting points are arranged on the outer main beams, the hoisting points are selected at 1/3 of steel beams, the arc ends of the main beams are tensioned by using steel wire ropes, the middle main beam is tensioned by using a chain block and a lifting hook of the crane, the rigidity of the structure of the folding section is enhanced, and the downwarping value of the structure is reduced.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (8)
1. The installation method of the large-span special-shaped steel structure toll booth is characterized by comprising the following steps: the steel roof is installed in sections after the steel vertical frames of the toll booth are installed, the steel roof is divided into a supporting section and a folding section, the supporting section is spliced on the steel vertical frames, the folding section is spliced on the ground, and after the folding section is spliced, the folding section and the supporting section are folded and butted by the double-crane lifting.
2. The installation method of the large-span special-shaped steel structure toll booth according to claim 1, wherein the method specifically comprises the following arrangement:
s1: after the construction of the bottom plate is finished and before the side mold is not constructed, embedding a main body embedded part;
s2: installing a steel stand, hoisting a steel column and an inclined strut, controlling the axis of the steel column and the three-dimensional coordinate of the column top, connecting the steel column with a main body embedded part, and installing the inclined strut at the column top of the steel column;
s3: installing a steel roof supporting section, namely hoisting a main beam firstly and then hoisting a secondary beam, and controlling the axis of the main beam and the welding of a steel beam;
s4: mounting a steel roof closure section, splicing a jig frame on the ground and adding a connecting rod piece; assembling a main beam after the assembly of the jig frame is finished, and controlling the axis of the main beam and the arc line type of the main beam; assembling the secondary beams, firstly installing the positioning secondary beams to ensure the overall dimension of the closure section, assembling the other secondary beams in the middle, assembling the overhanging secondary beams, and symmetrically applying and welding the overhanging steel beams on the two sides;
s5: after the assembly of the closure segments is completed, removing temporary supports influencing the hoisting;
s6: two cranes synchronously lift a section of folding section to be folded and butted with the support section, the main steel beam butt joint part is welded, and the cranes loosen hooks after the main steel beam is welded;
s7: and finishing the construction of the main steel structure.
3. The installation method of the large-span special-shaped steel structure toll booth according to claim 2, wherein: the folding sections are assembled under the installation positions of the folding sections, the main beams of the folding sections assembled on the ground are positioned by projection from the steel beams of the supporting sections, the axes are kept consistent, and the elevation relative position relation of the steel beams of the folding sections is kept consistent with that of the steel beams of the supporting sections.
4. The installation method of the large-span special-shaped steel structure toll booth according to claim 3, wherein: the steel beam upper flange part of the steel roof is provided with a hoisting hole or a welding lifting lug as a hoisting point, and the distance from the hoisting point to the end head of the steel beam is 1/4 of the total length of the member.
5. The installation method of the large-span special-shaped steel structure toll booth according to claim 4, wherein: before the steel beam of the steel roof is hoisted, dirt on the surface of the steel beam is cleaned, and the rust removal is carried out on the connecting plate and the friction surface which generate the rust before the steel beam is hoisted.
6. The installation method of the large-span special-shaped steel structure toll booth according to claim 5, wherein: the folding temperature of the steel roof is controlled to be 15-20 ℃.
7. The installation method of the large-span special-shaped steel structure toll booth according to claim 3, wherein: when the folding section is hoisted, each crane is connected with four hoisting points, the hoisting points are arranged on the outer main beams, the arc ends of the main beams are tensioned by using steel wire ropes, the middle main beam is tensioned by using a chain block and a lifting hook of the crane, the rigidity of the structure of the folding section is enhanced, and the downwarping value of the structure is reduced.
8. The installation method of the large-span special-shaped steel structure toll booth according to claim 2, wherein: the main part built-in fitting include support, rag bolt, anchor plate, the support includes the upper and lower two-layer square frame that the angle steel welded, rag bolt wears four apex department at the frame, top, bottom surface set up bolt locking, concrete structure's horizontal muscle is crossed to be arranged into the well style of calligraphy frame and welds with the frame outlying perpendicular muscle on the frame, the anchor plate cover is on rag bolt.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114855991A (en) * | 2022-06-16 | 2022-08-05 | 中国建筑一局(集团)有限公司 | Folding method suitable for large-span arched steel structure building |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3153303A (en) * | 1959-03-20 | 1964-10-20 | James E Wheeler | Building construction |
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| CN114855991B (en) * | 2022-06-16 | 2023-11-10 | 中国建筑一局(集团)有限公司 | Folding method suitable for large-span arched steel structure building |
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