CN112983013A - Construction method of large-span net frame walking frame - Google Patents
Construction method of large-span net frame walking frame Download PDFInfo
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- CN112983013A CN112983013A CN202110196146.8A CN202110196146A CN112983013A CN 112983013 A CN112983013 A CN 112983013A CN 202110196146 A CN202110196146 A CN 202110196146A CN 112983013 A CN112983013 A CN 112983013A
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- net rack
- shaped net
- section starting
- span arc
- butt joint
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- 238000010276 construction Methods 0.000 title claims abstract description 21
- 210000001503 joint Anatomy 0.000 claims abstract description 36
- 238000000034 method Methods 0.000 claims abstract description 16
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification 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
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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
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The embodiment of the invention provides a construction method of a large-span net rack walking frame, which comprises the following steps: splicing the bolt ball, the chord member and the web member of the basic part into a combined unit; assembling the combined units on the ground according to design parameters to obtain an A-section starting span arc-shaped net rack and a B-section starting span arc-shaped net rack; hoisting an A-section starting span arc-shaped net rack and a B-section starting span arc-shaped net rack by using a crane, wherein the free end of the A-section starting span arc-shaped net rack is arranged on a first walking frame support and the butt joint end of the A-section starting span arc-shaped net rack is hoisted to the position above the butt joint point in the hoisting process, the free end of the B-section starting span arc-shaped net rack is arranged on a second starting frame support opposite to the first walking frame support, and the butt joint end of the B-section starting span arc-; and lowering the butt joint end of the A-section starting span arc-shaped net rack to the position of the butt joint point, and carrying out air butt joint on the butt joint end of the A-section starting span arc-shaped net rack and the butt joint end of the B-section starting span arc-shaped net rack. By applying the scheme provided by the embodiment of the invention, the construction efficiency can be improved.
Description
Technical Field
The invention relates to the technical field of construction of a large-span net rack starting frame, in particular to a construction method of the large-span net rack starting frame.
Background
The steel structure net rack is a space structure formed by connecting a plurality of rod pieces through nodes according to a certain space grid form, and is gradually popularized due to the characteristics of simple structure, convenience in connection, clear stress, high node rigidity, light weight, attractive appearance and the like.
In practice, the construction method of the net frame scaffold is various, for example, a full-frame platform installation scaffold, a gable scaffold, etc. However, the mounting and starting method of the full-support platform requires matching of scaffolds, and the scaffold lease cost is high and the operation period is long; the hill-start method is easy to start, but only can work on one side after starting, and the subsequent working period is long. In summary, the conventional construction method of the net frame walking frame has the defects of long time span, high construction cost, difficulty in ensuring the construction period and the like.
Disclosure of Invention
The embodiment of the invention provides a construction method of a large-span net rack walking frame, and the technical effects of improving the construction efficiency and reducing the construction cost are achieved.
In one aspect of the present invention, a construction method of a large-span net rack scaffold is provided, including:
splicing the bolt ball, the chord member and the web member of the basic part into a combined unit;
assembling the combined units on the ground according to design parameters to obtain an A-section starting span arc-shaped net rack and a B-section starting span arc-shaped net rack;
hoisting an A-section starting span arc-shaped net rack and a B-section starting span arc-shaped net rack by using a crane, wherein the free end of the A-section starting span arc-shaped net rack is arranged on a first walking frame support and the butt joint end of the A-section starting span arc-shaped net rack is hoisted to the position above the butt joint point in the hoisting process, the free end of the B-section starting span arc-shaped net rack is arranged on a second starting frame support opposite to the first walking frame support, and the butt joint end of the B-section starting span arc-;
and (3) lowering the butt joint end of the A-section starting span arc-shaped net rack to the butt joint position, and carrying out air butt joint on the butt joint end of the A-section starting span arc-shaped net rack and the butt joint end of the B-section starting span arc-shaped net rack to complete the assembly of the large-span net rack walking frame.
Compared with the prior art, the invention has the beneficial effects that: by applying the scheme provided by the embodiment of the invention, after the two sections of starting span arc-shaped net racks are assembled on the ground, the crane is used for hoisting to complete air butt joint, so that the assembly of the large-span net rack scaffold is realized, and the scaffold erection time is saved without erecting a scaffold; in addition, after the net rack starting frame is assembled, the steel structure net racks can be simultaneously operated to the two sides of the net rack starting frame by taking the net rack starting frame as the center, and the construction efficiency is improved.
In implementation, the first and second step-up frame supports are spherical supports.
In the implementation, after the assembly of the large-span net rack scaffold is completed, the method further comprises the following steps:
and welding and fixing the free end of the A-section starting span arc-shaped net rack and a first step frame support, and welding and fixing the free end of the B-section starting span arc-shaped net rack and a second step frame support.
In the implementation, before hoisting the starting span arc-shaped net rack of the section A and the starting span arc-shaped net rack of the section B by using the crane, the method further comprises the following steps:
and temporarily tensioning and reinforcing the A-section starting span arc-shaped net rack and the B-section starting span arc-shaped net rack by adopting steel strands.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic top view of a starting span arch network provided by an embodiment of the invention;
FIG. 2 is a schematic diagram of a starting span arc-shaped net rack hoisting process provided by the embodiment of the invention;
fig. 3 is a schematic structural diagram of a large-span net rack starting frame provided by the embodiment of the invention after assembly is completed;
fig. 4 is a schematic structural view of a spherical rack support according to an embodiment of the present invention;
fig. 5 is a schematic drawing of the tensioning of a steel strand according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
The construction method of the large-span net rack walking frame provided by the embodiment of the invention comprises the following steps:
step one, splicing a bolt ball, a chord member and a web member of a basic part into a combined unit.
Secondly, splicing the combined units on the ground according to design parameters to obtain an A-section starting span arc-shaped net rack and a B-section starting span arc-shaped net rack; as shown in fig. 1, is a schematic top view of a starting span arc net rack; wherein the design parameters may include: and starting to span parameters such as the number, the span and the like of the combined units contained in the arc-shaped net rack.
Step three, as shown in fig. 2, hoisting the a-section starting span arc-shaped net rack and the B-section starting span arc-shaped net rack by using a crane, wherein the free end of the a-section starting span arc-shaped net rack is arranged on a first step frame support, and the butt joint end of the a-section starting span arc-shaped net rack is hoisted to the position above the butt joint point in the hoisting process, and the free end of the B-section starting span arc-shaped net rack is arranged on a second step frame support opposite to the first step frame support, and the butt joint end of the B-section; the free end is the end which is placed on the starting frame support and is used as a fulcrum in the hoisting process; the butt joint end is also used for the air butt joint of the two-section starting span arc-shaped net rack.
And step four, lowering the butt joint end of the A-section starting span arc-shaped net rack to the butt joint position, and carrying out air butt joint on the butt joint end of the A-section starting span arc-shaped net rack and the butt joint end of the B-section starting span arc-shaped net rack to complete the assembly of the large-span net rack walking frame, wherein a structural schematic diagram of the large-span net rack walking frame after the assembly is completed is shown in fig. 3.
In implementation, the first and second step-up frame supports are spherical supports. Wherein, as shown in fig. 4, the spherical net rack support includes: the first rib plate, the second rib plate, the third rib plate, the fourth rib plate, the bottom support, the side support and the spherical node; the assembly of spherical net rack support comprises:
1) the bottom support and the side support are respectively fixed on the embedded foundation bolts in the concrete structure, the bottom support is horizontally placed, and the side support is vertically placed on one side of the bottom support.
2) The first rib plate and the second rib plate are welded on the bottom support after being spliced in a cross manner, and the top edges of the first rib plate and the second rib plate are arc-shaped with concave middle parts and are matched with the surface of the spherical node; i.e., the top edges of the first and second ribs form a bowl for holding the ball joint.
3) A spherical node is disposed on top of the first and second ribs.
4) The third rib plate and the fourth rib plate are welded on the side support after being spliced in a cross manner, and the top edges of the third rib plate and the fourth rib plate are arc-shaped with concave centers, are matched with the surface of the spherical node and are abutted against the surface of the spherical node. In the hoisting process, the spherical node can rotate as a fulcrum in a space formed by the first rib plate, the second rib plate, the third rib plate and the fourth rib plate.
In the implementation, after the assembly of the large-span net rack scaffold is completed, the method further comprises the following steps:
and welding and fixing the free end of the A-section starting span arc-shaped net rack and a first step frame support, and welding and fixing the free end of the B-section starting span arc-shaped net rack and a second step frame support.
In the implementation, before hoisting the starting span arc-shaped net rack of the section A and the starting span arc-shaped net rack of the section B by using the crane, the method further comprises the following steps:
and the steel strand is adopted to temporarily tighten and reinforce the A-section starting span arc-shaped net rack and the B-section starting span arc-shaped net rack, so that the flexibility of the net racks is increased. In the temporary tensioning process, the steel strand lock catch and the electric chain block are adopted to perform knot drawing on the pre-designed knot drawing points on the A-section starting span arc-shaped net rack and the B-section starting span arc-shaped net rack, the positions of the knot drawing points can be selected according to the span of the starting span arc-shaped net rack, and the larger the span is, the more the number of the corresponding knot drawing points is.
By applying the scheme provided by the embodiment of the invention, after the two sections of starting span arc-shaped net racks are assembled on the ground, the crane is used for hoisting to complete air butt joint, so that the assembly of the large-span net rack scaffold is realized, and the scaffold erection time is saved without erecting a scaffold; in addition, after the net rack starting frame is assembled, the steel structure net racks can be simultaneously operated to the two sides of the net rack starting frame by taking the net rack starting frame as the center, and the construction efficiency is improved.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (4)
1. A construction method of a large-span net rack walking frame is characterized by comprising the following steps:
splicing the bolt ball, the chord member and the web member of the basic part into a combined unit;
assembling the combined units on the ground according to design parameters to obtain an A-section starting span arc-shaped net rack and a B-section starting span arc-shaped net rack;
hoisting an A-section starting span arc-shaped net rack and a B-section starting span arc-shaped net rack by using a crane, wherein the free end of the A-section starting span arc-shaped net rack is arranged on a first walking frame support and the butt joint end of the A-section starting span arc-shaped net rack is hoisted to the position above the butt joint point in the hoisting process, the free end of the B-section starting span arc-shaped net rack is arranged on a second starting frame support opposite to the first walking frame support, and the butt joint end of the B-section starting span arc-;
and (3) lowering the butt joint end of the A-section starting span arc-shaped net rack to the butt joint position, and carrying out air butt joint on the butt joint end of the A-section starting span arc-shaped net rack and the butt joint end of the B-section starting span arc-shaped net rack to complete the assembly of the large-span net rack walking frame.
2. The construction method according to claim 1, wherein the first and second starting frame supports are spherical supports.
3. The construction method according to claim 1, wherein after the assembling of the large-span net-frame scaffold is completed, the method further comprises:
and welding and fixing the free end of the A-section starting span arc-shaped net rack and a first step frame support, and welding and fixing the free end of the B-section starting span arc-shaped net rack and a second step frame support.
4. The construction method as claimed in claim 1, wherein before hoisting the starting span arc net rack at the a section and the starting span arc net rack at the B section by using the crane, the method further comprises:
and temporarily tensioning and reinforcing the A-section starting span arc-shaped net rack and the B-section starting span arc-shaped net rack by adopting steel strands.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110196146.8A CN112983013A (en) | 2021-02-22 | 2021-02-22 | Construction method of large-span net frame walking frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110196146.8A CN112983013A (en) | 2021-02-22 | 2021-02-22 | Construction method of large-span net frame walking frame |
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| Publication Number | Publication Date |
|---|---|
| CN112983013A true CN112983013A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110196146.8A Pending CN112983013A (en) | 2021-02-22 | 2021-02-22 | Construction method of large-span net frame walking frame |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116044176A (en) * | 2022-12-22 | 2023-05-02 | 中国水利水电第九工程局有限公司 | Method for installing steel structure roof net rack |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4201275A (en) * | 1976-10-20 | 1980-05-06 | A. Monk & Company Limited | Means for the renovating and refurbishing of overhead structures |
| WO1991010789A1 (en) * | 1990-01-10 | 1991-07-25 | Schildge Adam T | Cable-stay roof and method of construction |
| CN102345393A (en) * | 2011-07-14 | 2012-02-08 | 中建八局第四建设有限公司 | High-altitude bulk process of bolt ball net frame |
| CN104963412A (en) * | 2015-05-29 | 2015-10-07 | 安徽中亚钢结构工程有限公司 | Hinge station plate-type support and mounting method thereof |
| CN105951994A (en) * | 2016-06-29 | 2016-09-21 | 铁道第三勘察设计院集团有限公司 | Cylindrical latticed shell sealed canopy and expanded installation method thereof |
| CN108571077A (en) * | 2018-05-18 | 2018-09-25 | 中国二十二冶集团有限公司 | Across the rotation axis assembly installation method of rack starting |
| CN108643357A (en) * | 2018-05-21 | 2018-10-12 | 中国二十二冶集团有限公司 | Across the installation on ground method of arch grid structure starting and its dedicated infrastructure |
-
2021
- 2021-02-22 CN CN202110196146.8A patent/CN112983013A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4201275A (en) * | 1976-10-20 | 1980-05-06 | A. Monk & Company Limited | Means for the renovating and refurbishing of overhead structures |
| WO1991010789A1 (en) * | 1990-01-10 | 1991-07-25 | Schildge Adam T | Cable-stay roof and method of construction |
| CN102345393A (en) * | 2011-07-14 | 2012-02-08 | 中建八局第四建设有限公司 | High-altitude bulk process of bolt ball net frame |
| CN104963412A (en) * | 2015-05-29 | 2015-10-07 | 安徽中亚钢结构工程有限公司 | Hinge station plate-type support and mounting method thereof |
| CN105951994A (en) * | 2016-06-29 | 2016-09-21 | 铁道第三勘察设计院集团有限公司 | Cylindrical latticed shell sealed canopy and expanded installation method thereof |
| CN108571077A (en) * | 2018-05-18 | 2018-09-25 | 中国二十二冶集团有限公司 | Across the rotation axis assembly installation method of rack starting |
| CN108643357A (en) * | 2018-05-21 | 2018-10-12 | 中国二十二冶集团有限公司 | Across the installation on ground method of arch grid structure starting and its dedicated infrastructure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116044176A (en) * | 2022-12-22 | 2023-05-02 | 中国水利水电第九工程局有限公司 | Method for installing steel structure roof net rack |
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Application publication date: 20210618 |