CN111218987A - Bearing type net rack construction method - Google Patents
Bearing type net rack construction method Download PDFInfo
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- CN111218987A CN111218987A CN202010027070.1A CN202010027070A CN111218987A CN 111218987 A CN111218987 A CN 111218987A CN 202010027070 A CN202010027070 A CN 202010027070A CN 111218987 A CN111218987 A CN 111218987A
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- net rack
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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
- E04B1/32—Arched structures; Vaulted structures; Folded structures
- E04B1/3211—Structures with a vertical rotation axis or the like, e.g. semi-spherical structures
-
- 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
- E04B1/32—Arched structures; Vaulted structures; Folded structures
- E04B2001/3223—Theorical polygonal geometry therefor
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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
- E04B1/32—Arched structures; Vaulted structures; Folded structures
- E04B2001/3229—Arched structures; Vaulted structures; Folded structures constructed using a boom
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention belongs to the technical field of grid engineering construction in the building industry, and particularly relates to a bearing type grid construction method, wherein a square pyramid bolt ball-shaped grid is adopted as a bearing type grid, and a grid support is supported in a lower chord single-ring mode, and the bearing type grid construction method comprises the following steps: 1) sorting the components; 2) assembling the four-corner small cone single piece; 3) assembling a starting net rack block unit; 4) assembling a reference net rack, and 5) adopting a high-altitude bulk loading method to install the subsequent net racks, wherein the net racks on the two sides are installed in a step shape along with the continuous rising of the net racks until the installation is finished. The construction method combining sectional hoisting and high-altitude bulk loading is adopted, and the construction method has the advantages of high construction precision, convenience in installation, low engineering cost, low construction difficulty, rapidness and high efficiency in installation, greatly reduces the loss of construction turnover materials such as scaffolds and the like, saves the investment of lease fees, reduces the safety risk of site construction, is beneficial to shortening the construction period, and reduces the construction cost.
Description
Technical Field
The invention belongs to the technical field of grid engineering construction in the building industry, and particularly relates to a bearing type grid construction method.
Background
The installation of the steel net frame can adopt methods of high-altitude scattered assembly forming, integral hoisting, integral lifting and jacking, sectional hoisting high-altitude splicing, high-altitude sliding and the like, and can be divided into cross-inside hoisting and cross-outside hoisting. Complicated to the site operation environment, for example, lime stone buffering material canopy rack engineering stores material canopy rack engineering with sieve soil in advance, rack structure form is square pyramid bolt ball bolt sphere rack, when rack upper portion construction area has the corridor, the construction site is little, the mounting height is high, if adopt the high altitude bulk cargo method because of the great many temporary supports that need set up of column spacing, the expense is great and construction quality, the safety is difficult to control, adopt the high altitude method of sliding, the whole lift-up method, it is unrealistic that whole jacking method is because of place and place top have the corridor. In order to ensure that the construction progress is completed in time, a new bearing type grid construction method is urgently needed.
Disclosure of Invention
In order to solve the technical problem, the invention provides a construction method of a bearing type net rack, wherein the bearing type net rack adopts a square pyramid bolt ball-shaped net rack which is placed rightly, and a net rack support of the bearing type net rack is supported in a lower chord single ring mode, and the construction method comprises the following steps:
1) and (4) sorting the components, namely stacking the rod pieces and the bolt balls transported to the site in a classified manner according to specifications and models, marking and taking the rod pieces and the bolt balls conveniently.
2) Assembling the four-corner small cone single piece, assembling the rod piece and the bolt ball in the step 1) into a single four-corner small cone single piece according to the 4-rod 1 ball for standby, wherein the four-corner small cone single piece is divided into a lower chord installation four-corner frame and an upper chord installation four-corner frame, the lower chord installation four-corner frame comprises two lower chords and a web member, and the upper chord installation four-corner frame comprises two upper chords and a web member and is used for being matched according to different grid layers of the net rack.
3) Assembling starting net rack block units, equally dividing a first circle of net racks corresponding to the net rack support into a plurality of starting net rack block units along a support ring beam, wherein the starting net rack block units are formed by splicing four-corner small cone units in the step 2) by adopting a ground bulk assembly method, the structure height of the starting net rack block units is that one row of lower chord grids and two rows of upper chord grids are arranged at the bottommost part of the bearing type net rack, the structure width is three column pitches, and the ground is leveled by square timbers or cushion blocks during assembling so as to ensure that bolts can be installed in place without over-twisting or false-twisting phenomena and ensure the construction precision of a reference span.
4) Assembling a reference net rack, selecting a starting net rack block unit as a reference block unit, hoisting the reference block unit to 3 adjacent net rack supports by using a 25T crane, respectively arranging two-side fixed adjusting points at two ends of the reference block unit, then sequentially hoisting the other starting net rack block units to the corresponding net rack supports along the directions of two sides of the reference block unit, wherein the starting net rack block units at two sides of the reference block unit are respectively provided with a fixed adjusting point at one side far away from the reference block unit, the adjacent starting net rack block units are connected through a rod piece, the rod piece connection is carried out by two steps of initial screwing and final screwing, the final screwing is carried out after the initial screwing of all butt joint rod pieces, and the steps are carried out step by step according to the sequence of a web member, a lower chord member and an upper chord member to ensure that each rod piece can be connected in place until the reference net rack is folded and is reinforced firmly, and (3) forming rigidity on the reference net rack, adjusting the deviation between the axis of the reference net rack and the civil engineering axis within an allowable range, and welding and fixing the embedded parts of the reference net rack and the net rack support. The installation of starting stage benchmark rack finishes like this, and the rack has formed sufficient rigidity this moment, and self can bear the construction load of rack, can set one's mind at rest and carry out the installation construction on the benchmark rack.
5) And (3) adopting a high-altitude bulk mounting method to mount the subsequent net racks, taking the reference net rack as a platform, hanging the four-corner small cone single piece assembled in the step 2) to a designed position by using a 25T crane for high-altitude assembly, and mounting the net racks on two sides in a stepped manner along with the continuous rising of the net racks until the mounting is finished so as to ensure the stability of the net racks in the mounting process.
Preferably, the temporary fixing and adjusting of the reference net rack in the step 4) are completed by means of fixed adjusting points, each fixed adjusting point is arranged in a bidirectional symmetry mode, a 10mm steel wire rope is fixed by a ground anchor, each 3 column pitches are provided with one temporary fixed adjusting point, a scaffold rod buckling horse leg is used as a standby support between the two temporary fixed adjusting points, and the support height is smaller than the designed elevation by 5mm and is used as support supplement for the temporary fixed adjusting points.
Preferably, in the step 5), during high-altitude bulk construction operation, three tethers are tied to the ball end and the upper chord or the lower chord respectively, the three tethers are connected with a crane hook, the ground assembled four-corner small cone single piece is directly conveyed to an installation position through a crane, each connection point is answered at high altitude by an installer, the installer receives the corresponding installation rod piece and then connects the high-strength stud with the stud ball hole, three-five buckles are screwed in during primary connection to correspond to the installation conditions of other installation teams, after all the installation studs are screwed into the corresponding threaded holes of the stud ball, the high-strength studs are fastened in place together, after all the rod pieces are fastened, the tethers can be unfastened, the hooks are loosened to install the four-corner small cone single piece, and the steps are repeated until all the installation work is completed, so that the construction safety and the construction precision are ensured.
The invention also comprises other components which can be normally used in the construction method of the bearing type net rack, and the components are conventional technical means in the field. In addition, the undefined devices or components of the present invention are all those conventionally used in the art.
The construction method combining sectional hoisting and high-altitude bulk loading is adopted, and the construction method has the advantages of high construction precision, convenience in installation, low engineering cost, low construction difficulty, rapidness and high efficiency in installation, greatly reduces the loss of construction turnover materials such as scaffolds and the like, saves the investment of lease fees, reduces the safety risk of site construction, is beneficial to shortening the construction period, and reduces the construction cost.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic view of the whole installation structure of the carrying type net rack of the invention.
Fig. 2 is a schematic view showing the installation direction of the reference net mount according to the present invention.
FIG. 3 is a schematic structural view of the lower chord mounting quadrilateral frame of the invention.
FIG. 4 is a schematic structural view of the upper chord mounting quadrangular frame of the present invention.
Detailed Description
The present invention will be described more clearly with reference to the accompanying drawings, which are included to illustrate and not to limit the present invention. All other embodiments, which can be obtained by those skilled in the art without any inventive step based on the embodiments of the present invention, should be included in the scope of the present invention.
Examples
As shown in fig. 1 to 4, the invention provides a construction method of a bearing type net rack, wherein the bearing type net rack 1 adopts a square pyramid bolt sphere-shaped net rack which is placed at the right angle, and a net rack support 8 is supported in a lower chord single-ring mode, and the construction method comprises the following steps:
1) and (4) sorting the components, namely stacking the rod pieces and the bolt balls transported to the site in a classified manner according to specifications and models, marking and taking the rod pieces and the bolt balls conveniently.
2) Assembling the four-corner small cone single piece, assembling the rod piece and the bolt ball in the step 1) into a single four-corner small cone single piece according to a 4-rod 1 ball for standby, wherein the four-corner small cone single piece is divided into a lower chord installation four-corner frame 2 and an upper chord installation four-corner frame 3, the lower chord installation four-corner frame 2 comprises two lower chords 4 and a web member 5, and the upper chord installation four-corner frame 3 comprises two upper chords 6 and a web member 5 and is used for being matched according to different grid layers of the net rack.
3) Assembling starting net rack block units, equally dividing a first circle of net racks corresponding to the net rack support into a plurality of starting net rack block units along a support ring beam, wherein the starting net rack block units are formed by splicing four-corner small cone units in the step 2) by adopting a ground bulk assembly method, the structural height of the starting net rack block units is that one row of lower chord grids 1-1 and two rows of upper chord grids 1-2 at the bottom of the bearing type net rack 1, the structural width is three column pitches, and the ground is leveled by square timbers or cushion blocks during assembling so as to ensure that bolts can be installed in place without over-twisting or false twisting phenomena and ensure the construction precision of a reference span.
4) Assembling a reference net rack, selecting a starting net rack block unit as a reference block unit 7, hoisting the reference block unit 7 to 3 adjacent net rack supports 8 by using a 25T crane, respectively arranging two-side fixed adjusting points at two ends of the reference block unit 7, then sequentially hoisting the other starting net rack block units to the corresponding net rack supports 8 along two side directions of the reference block unit 7, wherein the starting net rack block units at two sides of the reference block unit 7 are respectively provided with a fixed adjusting point at one side far away from the reference block unit 7, the adjacent starting net rack block units are connected through rod pieces, the rod piece connection is performed by two steps of initial screwing and final screwing, the final screwing is performed step by step according to the sequence of the web member 5, the lower chord 4 and the upper chord 6 after all butt joint rod pieces are initially screwed, so as to ensure that each rod piece can be connected in place until the reference net rack is folded, and the temporary support is used for strengthening firmly, so that the reference net rack forms rigidity, the deviation between the axis of the reference net rack and the civil engineering axis is adjusted within an allowable range, and the reference net rack and the embedded part of the net rack support 8 are welded and fixed. The installation of starting stage benchmark rack finishes like this, and the rack has formed sufficient rigidity this moment, and self can bear the construction load of rack, can set one's mind at rest and carry out the installation construction on the benchmark rack.
5) And (3) adopting a high-altitude bulk mounting method to mount the subsequent net racks, taking the reference net rack as a platform, hanging the four-corner small cone single piece assembled in the step 2) to a designed position by using a 25T crane for high-altitude assembly, and mounting the net racks on two sides in a stepped manner along with the continuous rising of the net racks until the mounting is finished so as to ensure the stability of the net racks in the mounting process.
The temporary fixing and adjusting of the reference net rack in the step 4) are completed by means of fixed adjusting points, each fixed adjusting point is arranged in a bidirectional symmetry mode, a 10mm steel wire rope is used for fixing through a ground anchor, a temporary fixed adjusting point is arranged at each 3 column pitches, a scaffold rod is used for buckling a horse leg between the two temporary fixed adjusting points to serve as a standby support, the support height is smaller than the designed elevation by 5mm, and the support supplement is used for supporting the temporary fixed adjusting points.
During high-altitude bulk construction operation in the step 5), three tethers are tied to the ball end and the upper chord 6 or the lower chord 4 respectively, the three tethers are connected with a crane hook, the four-corner small cone single piece assembled on the ground is directly conveyed to an installation position through a crane, each connection point is answered at high altitude by an installer, the installer receives a corresponding installation rod piece and then connects the high-strength stud with the stud ball hole, three-five buckles are screwed in during primary connection in response to installation conditions of other installation team members, after all installation studs are screwed into corresponding threaded holes of the stud ball, the high-strength studs are fastened in place together, after all the rod pieces are fastened, the tethers can be unfastened, the hooks are loosened, the four corners of the small cone single piece are installed, and the steps are repeated until all installation work is completed, so that construction safety and construction precision are ensured.
The construction method combining sectional hoisting and high-altitude bulk loading is adopted, and the construction method has the advantages of high construction precision, convenience in installation, low engineering cost, low construction difficulty, rapidness and high efficiency in installation, greatly reduces the loss of construction turnover materials such as scaffolds and the like, saves the investment of lease fees, reduces the safety risk of site construction, is beneficial to shortening the construction period, and reduces the construction cost.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments.
Claims (3)
1. The utility model provides a bear formula rack construction method, bear formula rack adopts and just puts quadrangular pyramid bolt sphere rack, and the support form of its rack support is that the single circle of lower chord supports, its characterized in that, includes the following step:
1) sorting the components, namely stacking the rod pieces and the bolt balls transported to the site in a classified manner according to specifications and models, and marking;
2) assembling the small quadrangular cone single piece, namely assembling the rod piece and the bolt ball in the step 1) into a single small quadrangular cone single piece according to a 4-rod 1 ball for later use, wherein the small quadrangular cone single piece is divided into a lower chord installation quadrangular frame and an upper chord installation quadrangular frame, the lower chord installation quadrangular frame comprises two lower chords and a web member, and the upper chord installation quadrangular frame comprises two upper chord and a web member;
3) assembling starting net rack block units, equally dividing a first circle of net racks corresponding to the net rack support into a plurality of starting net rack block units along a support ring beam, wherein the starting net rack block units are formed by splicing the four-corner small cone units in the step 2) by adopting a ground bulk assembly method, the structural height of the starting net rack block units is one row of lower chord grids and two rows of upper chord grids at the bottommost part of the bearing type net rack, the structural width is three column pitches, and the ground is leveled by square timbers or cushion blocks during assembly so as to ensure that bolts can be installed in place without over-screwing or false-screwing phenomena;
4) assembling a reference net rack, selecting a starting net rack block unit as a reference block unit, hoisting the reference block unit to 3 adjacent net rack supports by using a 25T crane, respectively arranging two-side fixed adjusting points at two ends of the reference block unit, then sequentially hoisting the other starting net rack block units to the corresponding net rack supports along the directions of two sides of the reference block unit, wherein the starting net rack block units at two sides of the reference block unit are respectively provided with a fixed adjusting point at one side far away from the reference block unit, the adjacent starting net rack block units are connected through a rod piece, the rod piece connection is carried out by two steps of initial screwing and final screwing, the final screwing is carried out after the initial screwing of all butt joint rod pieces, and the steps are carried out step by step according to the sequence of a web member, a lower chord member and an upper chord member to ensure that each rod piece can be connected in place until the reference net rack is folded and is reinforced firmly, forming rigidity on the reference net rack, adjusting the deviation between the axis of the reference net rack and the civil engineering axis within an allowable range, and welding and fixing the embedded parts of the reference net rack and the net rack support;
5) and (3) adopting an overhead bulk mounting method to mount the subsequent net racks, taking the reference net rack as a platform, hanging the four-corner small cone single piece assembled in the step 2) to a designed position by using a 25T crane for overhead assembly, and mounting the net racks on two sides in a stepped manner along with the continuous rising of the net racks until the mounting is finished.
2. The construction method of a load-bearing grid structure according to claim 1, wherein: and 4), temporarily fixing and adjusting the reference net rack in the step 4) are completed by fixing adjusting points, each fixing adjusting point is bilaterally and symmetrically arranged, a 10mm steel wire rope is adopted to be fixed by a ground anchor, a temporary fixing adjusting point is arranged at each 3 column pitches, a scaffold rod is used for buckling a horse leg between the two temporary fixing adjusting points to serve as a standby support, and the support height is less than the designed elevation by 5 mm.
3. The construction method of a load-bearing grid structure according to claim 1, wherein: during high-altitude bulk construction operation in step 5), three tethers are tied to the ball end and the upper chord or the lower chord respectively, the three tethers are connected with a crane hook, the four-corner small cone single piece assembled on the ground is directly conveyed to an installation position through a crane, each connection point is answered at high altitude by an installer, the installer receives the corresponding installation rod piece and then connects the high-strength stud with the stud ball hole, three-five buckles are screwed in during primary connection in response to installation conditions of other installation team members, after all installation studs are screwed into corresponding threaded holes of the stud ball, the high-strength studs are fastened in place together, after all the rod pieces are fastened, the tethers can be unfastened, hooks are loosened, the four-corner small cone single piece is installed, and the process is repeated until all installation work is completed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010027070.1A CN111218987A (en) | 2020-01-10 | 2020-01-10 | Bearing type net rack construction method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010027070.1A CN111218987A (en) | 2020-01-10 | 2020-01-10 | Bearing type net rack construction method |
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| CN111218987A true CN111218987A (en) | 2020-06-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608397A (en) * | 2020-06-09 | 2020-09-01 | 贵州建工集团第四建筑工程有限责任公司 | Grid installation construction method |
| CN113123469A (en) * | 2021-03-24 | 2021-07-16 | 中国五冶集团有限公司 | Method for constructing complex curved surface modeling roof grid structure |
| CN113336079A (en) * | 2021-04-28 | 2021-09-03 | 中国建筑第二工程局有限公司 | Hoisting method for nuclear power steel lining strip bottom plate module |
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| JPH0681398A (en) * | 1992-08-31 | 1994-03-22 | Taisei Corp | Structure for dome roof and construction method thereof |
| 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 |
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2020
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| JPH0681398A (en) * | 1992-08-31 | 1994-03-22 | Taisei Corp | Structure for dome roof and construction method thereof |
| 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 |
| 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 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608397A (en) * | 2020-06-09 | 2020-09-01 | 贵州建工集团第四建筑工程有限责任公司 | Grid installation construction method |
| CN113123469A (en) * | 2021-03-24 | 2021-07-16 | 中国五冶集团有限公司 | Method for constructing complex curved surface modeling roof grid structure |
| CN113336079A (en) * | 2021-04-28 | 2021-09-03 | 中国建筑第二工程局有限公司 | Hoisting method for nuclear power steel lining strip bottom plate module |
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Application publication date: 20200602 |