CN110924690A - Large-span net rack installation method - Google Patents

Large-span net rack installation method Download PDF

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Publication number
CN110924690A
CN110924690A CN201911066146.5A CN201911066146A CN110924690A CN 110924690 A CN110924690 A CN 110924690A CN 201911066146 A CN201911066146 A CN 201911066146A CN 110924690 A CN110924690 A CN 110924690A
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CN
China
Prior art keywords
installation
net
net rack
starting
gable
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Pending
Application number
CN201911066146.5A
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Chinese (zh)
Inventor
王家国
刁万国
封锡波
马维强
崔军贺
金龙
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China Third Metallurgical Group Co Ltd
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China Third Metallurgical Group Co Ltd
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Priority to CN201911066146.5A priority Critical patent/CN110924690A/en
Publication of CN110924690A publication Critical patent/CN110924690A/en
Pending legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/14Conveying or assembling building elements
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/342Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/35Extraordinary methods of construction, e.g. lift-slab, jack-block
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/35Extraordinary methods of construction, e.g. lift-slab, jack-block
    • E04B1/3511Lift-slab; characterised by a purely vertical lifting of floors or roofs or parts thereof
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/35Extraordinary methods of construction, e.g. lift-slab, jack-block
    • E04B2001/3577Extraordinary methods of construction, e.g. lift-slab, jack-block prefabricating a building and moving it as a whole to the erection site

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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 relates to a method for installing a large-span net rack, wherein the large-span net rack is installed in a mode of gable starting and high-altitude bulk loading, and the installation process comprises the following steps: construction preparation, foundation rechecking, ground assembling and stepping frame, gable net frame installation, gable starting net frame correction, high-altitude overhanging and bulk loading, bulk net frame correction, support welding, painting and acceptance inspection; the method of assembling the walking frame on the ground, starting the mountain wall and bulk loading at high altitude is adopted, so that the construction efficiency is high, the construction cost is low, and the actual situation of an installation site is better met.

Description

Large-span net rack installation method
Technical Field
The invention relates to the technical field of steel structure building construction, in particular to a large-span net rack installation method.
Background
Various types of structures that span across a space of more than 60 meters in the transverse direction may be referred to as large-span spatial structures. Common large-span space structure forms comprise a folded plate structure, a shell structure, a grid structure, a suspension cable structure, an inflatable structure, a tent tension structure and the like. Wherein the net rack roof structure is a common long-span roof structure. The structure has the advantages of strong integrity, good stability, large space rigidity and good shock resistance. The net framework is small in height, and a large-span building can be assembled by using small rod-shaped components, so that the building space is effectively utilized. The large-span grid structure suitable for industrial production can be divided into a flat grid and a shell grid in appearance, and can adapt to various planar shapes such as circles, squares and polygons. The flat net frame is mostly double-layer, the shell net frame has a single layer and double layers, and has the roof forms of single curve, double curve and the like.
Due to the requirement of building functions, the span of the modern steel structure net rack is increasingly large, short span of more than one hundred meters is frequently seen, and the installation difficulty of the steel structure net rack is increased. The construction method of the traditional space steel structure generally comprises a high-altitude bulk mounting method, a strip or block mounting method, a high-altitude sliding method, an integral hoisting method, an integral lifting method, an integral jacking method and the like. The most reasonable installation method is to find an optimal balance point in three aspects of safety, economy and applicability.
Disclosure of Invention
The invention provides a large-span net rack installation method, which adopts a method of ground assembly of a walking frame, gable starting and high-altitude bulk loading, has high construction efficiency and low construction cost, and better meets the actual situation of an installation site.
In order to achieve the purpose, the invention adopts the following technical scheme:
the installation method of the large-span net rack is characterized in that the large-span net rack is installed in a gable starting and high-altitude bulk mode, and the installation process comprises the following steps: construction preparation, foundation rechecking, ground assembling and stepping frame, gable net frame installation, gable starting net frame correction, high-altitude overhanging and bulk loading, bulk net frame correction, support welding, painting and acceptance inspection; wherein:
1) when the foundation is rechecked, the axial dimension of the net rack, the elevation of the embedded part and the plane displacement are mainly checked to determine whether the design requirements are met; the pre-buried steel plate and the bearing surface allowable deviation at the net rack mounting support are as follows: the offset of the center line of the embedded steel plate and the positioning axis is less than or equal to 1.5 mm; the planeness of the embedded steel plate is less than or equal to 3 mm; the elevation of the supporting surface is less than or equal to 5 mm; the height difference between the highest bearing surface and the lowest bearing surface is less than or equal to 10 mm; the height difference of the bearing surfaces of the adjacent 2 mounting supports is less than or equal to 5 mm;
2) when the ground assembling scaffold, the material loading is organized according to the sequence of the installation of the net racks, the materials are proportioned in a construction area, a tripod is assembled firstly, and then the tripod is pushed to assemble a small unit triangular cone;
3) when the gable starting rack is installed, 2 cranes and a plurality of guy cables are symmetrically arranged on the outer side corresponding to the installation position of the gable starting rack, and the installation sequence is as follows: sequentially mounting from a low position to a high position and from the end part to the center; during installation, the small splicing units are hoisted to the positions close to the installation positions by using a crane, the theodolite and a steel ruler are used for checking, the installation positions are accurately adjusted by chain blocks, and the coordinate positions of all nodes are strictly controlled to meet the design requirements;
4) after the gable starting net rack is folded to form a stable unit, hoisting a small unit triangular cone assembled on the ground by using a crane, and starting butt joint and bulk loading from two ends of the gable starting net rack at high altitude; the method comprises the following steps: hoisting the small unit triangular pyramid by a crane, slowly hoisting the small unit triangular pyramid to a corresponding position in the air, and butting the small unit triangular pyramid with a local net rack; then the crane moves to the next installation position; sequentially butting from a low position to a high position, and finally closing at the top end; after the net rack is completely installed, all seams are tightly filled and embedded by putty, and redundant bolt holes are firmly plugged;
5) the installation of the net racks on the vertical surfaces at the two ends is that small unit triangular cones are spliced on the ground, then the small unit triangular cones are hoisted by a crane, and are butted and bulked from the lower parts at the two sides to the higher parts in sequence, and finally the net racks are folded in the middle.
Compared with the prior art, the invention has the beneficial effects that:
the method of assembling the walking frame on the ground, starting the mountain wall and bulk loading in high altitude is adopted, so that the construction efficiency is high, the construction cost is low, and the method is more suitable for the actual situation of an installation site.
Drawings
Fig. 1 is a schematic view (front view) of an installation sequence of the gable starting net rack in the invention.
Fig. 2 is a schematic view (side view) of a mounting sequence of the gable starting net rack in the mounting process of the invention.
Fig. 3 is a schematic view (front view) of an installation sequence of the gable starting net rack in the invention.
Fig. 4 is a schematic view (side view) of a mounting sequence of the gable starting net rack in the invention.
Fig. 5 is a schematic view (front view) of a third installation sequence of the gable starting net rack provided by the invention during installation.
Fig. 6 is a schematic view (side view) of a third installation sequence of the gable starting net rack provided by the invention during installation.
Fig. 7 is a schematic view (front view) of an installation sequence of the gable starting net rack provided by the invention during installation.
Fig. 8 is a fourth schematic view (side view) of the installation sequence of the gable starting net rack of the invention during installation.
Fig. 9 is a schematic view (front view) of an installation sequence of the gable starting net rack in the invention.
Fig. 10 is a schematic view (side view) of an installation sequence of the gable starting net rack in the installation process.
Fig. 11 is a schematic view (front view) illustrating a sixth installation sequence of the hill-start net rack according to the present invention.
Fig. 12 is a schematic view (side view) of the installation sequence of the gable starting net rack according to the present invention.
FIG. 13 is a schematic view of the small unit triangular pyramid butt joint bulk loading of the invention.
Fig. 14 is a schematic view of the installation of the double-ended facade of the net rack of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings:
the invention relates to a large-span net rack installation method, wherein the large-span net rack is installed in a mountain wall starting and high-altitude bulk mode, and the installation process comprises the following steps: construction preparation, foundation rechecking, ground assembling and stepping frame, gable net frame installation, gable starting net frame correction, high-altitude overhanging and bulk loading, bulk net frame correction, support welding, painting and acceptance inspection; wherein:
1) when the foundation is rechecked, the axial dimension of the net rack, the elevation of the embedded part and the plane displacement are mainly checked to determine whether the design requirements are met; the pre-buried steel plate and the bearing surface allowable deviation at the net rack mounting support are as follows: the offset of the center line of the embedded steel plate and the positioning axis is less than or equal to 1.5 mm; the planeness of the embedded steel plate is less than or equal to 3 mm; the elevation of the supporting surface is less than or equal to 5 mm; the height difference between the highest bearing surface and the lowest bearing surface is less than or equal to 10 mm; the height difference of the bearing surfaces of the adjacent 2 mounting supports is less than or equal to 5 mm;
2) when the ground assembling scaffold, the material loading is organized according to the sequence of the installation of the net racks, the materials are proportioned in a construction area, a tripod is assembled firstly, and then the tripod is pushed to assemble a small unit triangular cone;
3) when the gable starting net rack is installed, 2 cranes and a plurality of cable ropes are symmetrically arranged on the outer side corresponding to the installation position of the gable starting net rack, and as shown in fig. 1-12, the installation sequence is as follows: sequentially mounting from a low position to a high position and from the end part to the center; during installation, the small splicing units are hoisted to the positions close to the installation positions by using a crane, the theodolite and a steel ruler are used for checking, the installation positions are accurately adjusted by chain blocks, and the coordinate positions of all nodes are strictly controlled to meet the design requirements;
4) as shown in fig. 13, after the gable starting net rack is folded to form a stable unit, a small unit triangular cone assembled on the ground is lifted by a crane, and the two ends of the gable starting net rack are butted and bulked at high altitude; the method comprises the following steps: hoisting the small unit triangular pyramid by a crane, slowly hoisting the small unit triangular pyramid to a corresponding position in the air, and butting the small unit triangular pyramid with a local net rack; then the crane moves to the next installation position; sequentially butting from a low position to a high position, and finally closing at the top end; after the net rack is completely installed, all seams are tightly filled and embedded by putty, and redundant bolt holes are firmly plugged;
5) as shown in fig. 14, the net racks with vertical surfaces at two ends are also assembled by splicing small unit triangular cones on the ground, then hoisted by a crane, butted and bulked from the lower parts at two sides to the higher parts in sequence, and finally folded in the middle.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims (1)

1. The installation method of the large-span net rack is characterized in that the large-span net rack is installed in a mountain wall starting and high-altitude bulk mode, and the installation process comprises the following steps: construction preparation, foundation rechecking, ground assembling and stepping frame, gable net frame installation, gable starting net frame correction, high-altitude overhanging and bulk loading, bulk net frame correction, support welding, painting and acceptance inspection; wherein:
1) when the foundation is rechecked, the axial dimension of the net rack, the elevation of the embedded part and the plane displacement are mainly checked to determine whether the design requirements are met; the pre-buried steel plate and the bearing surface allowable deviation at the net rack mounting support are as follows: the offset of the center line of the embedded steel plate and the positioning axis is less than or equal to 1.5 mm; the planeness of the embedded steel plate is less than or equal to 3 mm; the elevation of the supporting surface is less than or equal to 5 mm; the height difference between the highest bearing surface and the lowest bearing surface is less than or equal to 10 mm; the height difference of the bearing surfaces of the adjacent 2 mounting supports is less than or equal to 5 mm;
2) when the ground assembling scaffold, the material loading is organized according to the sequence of the installation of the net racks, the materials are proportioned in a construction area, a tripod is assembled firstly, and then the tripod is pushed to assemble a small unit triangular cone;
3) when the gable starting rack is installed, 2 cranes and a plurality of guy cables are symmetrically arranged on the outer side corresponding to the installation position of the gable starting rack, and the installation sequence is as follows: sequentially mounting from a low position to a high position and from the end part to the center; during installation, the small splicing units are hoisted to the positions close to the installation positions by using a crane, the theodolite and a steel ruler are used for checking, the installation positions are accurately adjusted by chain blocks, and the coordinate positions of all nodes are strictly controlled to meet the design requirements;
4) after the gable starting net rack is folded to form a stable unit, hoisting a small unit triangular cone assembled on the ground by using a crane, and starting butt joint and bulk loading from two ends of the gable starting net rack at high altitude; the method comprises the following steps: hoisting the small unit triangular pyramid by a crane, slowly hoisting the small unit triangular pyramid to a corresponding position in the air, and butting the small unit triangular pyramid with a local net rack; then the crane moves to the next installation position; sequentially butting from a low position to a high position, and finally closing at the top end; after the net rack is completely installed, all seams are tightly filled and embedded by putty, and redundant bolt holes are firmly plugged;
5) the installation of the net racks on the vertical surfaces at the two ends is that small unit triangular cones are spliced on the ground, then the small unit triangular cones are hoisted by a crane, and are butted and bulked from the lower parts at the two sides to the higher parts in sequence, and finally the net racks are folded in the middle.
CN201911066146.5A 2019-11-04 2019-11-04 Large-span net rack installation method Pending CN110924690A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111719705A (en) * 2020-06-29 2020-09-29 中能建西北城市建设有限公司 Large-span net rack jacking construction process
CN111809893A (en) * 2020-08-18 2020-10-23 浙江中南建设集团钢结构有限公司 Installation method of curved steel latticed shell structure with gradually-changed mountain wall starting span diameter
CN112605953A (en) * 2020-11-27 2021-04-06 中建三局第一建设工程有限责任公司 Mounting tool and mounting method for spherical reticulated shell structure
CN114164934A (en) * 2021-11-29 2022-03-11 山西一建集团有限公司 Construction method of large-span columnar bolt ball joint net rack

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101988308A (en) * 2010-09-30 2011-03-23 中国华西企业有限公司 Non-support installation method of long-span spatial bolt ball steel reticulated shell dome
CN103075017A (en) * 2013-02-01 2013-05-01 徐州中煤百甲重钢科技有限公司 Super-long-span cylindrical shell lattice structure construction method
CN109881897A (en) * 2019-03-13 2019-06-14 徐州中煤百甲重钢科技股份有限公司 A kind of starting unit construction method of unilateral arch camber
CN110387965A (en) * 2019-07-11 2019-10-29 山西建筑工程集团有限公司 A kind of coal yard wide-span cylindrical reticulated shell structure gable starting construction method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101988308A (en) * 2010-09-30 2011-03-23 中国华西企业有限公司 Non-support installation method of long-span spatial bolt ball steel reticulated shell dome
CN103075017A (en) * 2013-02-01 2013-05-01 徐州中煤百甲重钢科技有限公司 Super-long-span cylindrical shell lattice structure construction method
CN109881897A (en) * 2019-03-13 2019-06-14 徐州中煤百甲重钢科技股份有限公司 A kind of starting unit construction method of unilateral arch camber
CN110387965A (en) * 2019-07-11 2019-10-29 山西建筑工程集团有限公司 A kind of coal yard wide-span cylindrical reticulated shell structure gable starting construction method

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111719705A (en) * 2020-06-29 2020-09-29 中能建西北城市建设有限公司 Large-span net rack jacking construction process
CN111809893A (en) * 2020-08-18 2020-10-23 浙江中南建设集团钢结构有限公司 Installation method of curved steel latticed shell structure with gradually-changed mountain wall starting span diameter
CN112605953A (en) * 2020-11-27 2021-04-06 中建三局第一建设工程有限责任公司 Mounting tool and mounting method for spherical reticulated shell structure
CN112605953B (en) * 2020-11-27 2022-03-15 中建三局第一建设工程有限责任公司 Mounting tool and mounting method for spherical reticulated shell structure
WO2022111486A1 (en) * 2020-11-27 2022-06-02 中建三局第一建设工程有限责任公司 Installation tool and installation method for spherical reticulated housing structure
US11629492B2 (en) 2020-11-27 2023-04-18 China Construction Third Bureau First Engineering Co., Ltd. Installation tool and method for spherical latticed shell structure
CN114164934A (en) * 2021-11-29 2022-03-11 山西一建集团有限公司 Construction method of large-span columnar bolt ball joint net rack

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Application publication date: 20200327