CN113833279A - Integral jacking construction method for deformed steel net rack with height difference during mounting of support - Google Patents
Integral jacking construction method for deformed steel net rack with height difference during mounting of support Download PDFInfo
- Publication number
- CN113833279A CN113833279A CN202111259982.2A CN202111259982A CN113833279A CN 113833279 A CN113833279 A CN 113833279A CN 202111259982 A CN202111259982 A CN 202111259982A CN 113833279 A CN113833279 A CN 113833279A
- Authority
- CN
- China
- Prior art keywords
- support
- net rack
- welding
- jacking
- net
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 22
- 239000010959 steel Substances 0.000 title claims abstract description 22
- 238000010276 construction Methods 0.000 title claims abstract description 21
- 238000003466 welding Methods 0.000 claims abstract description 53
- 238000009434 installation Methods 0.000 claims abstract description 16
- 230000002093 peripheral effect Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 4
- 238000011900 installation process Methods 0.000 claims description 2
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 3
- 235000017491 Bambusa tulda Nutrition 0.000 description 3
- 241001330002 Bambuseae Species 0.000 description 3
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 3
- 239000011425 bamboo Substances 0.000 description 3
- 239000011449 brick Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- 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
- E04B1/19—Three-dimensional framework structures
- E04B1/1903—Connecting nodes specially adapted therefor
- E04B1/1906—Connecting nodes specially adapted therefor with central spherical, semispherical or polyhedral connecting element
-
- 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
- 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
- E04G21/162—Handles to carry construction blocks
Landscapes
- 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 invention discloses an integral jacking construction method of a deformed steel net rack with a height difference in support installation, which comprises the steps of dividing the middle part of the deformed net rack into a plurality of sections of net racks at two sides of the inflection point at the lowest point; assembling and welding the first-section net rack, and jacking the first-section net rack for one time after the welding of the first-section net rack is completed; sequentially splicing and welding the first section of net rack and the second section of net rack; repeating the above steps S2-S4; after welding all the intermediate net frames, carrying out secondary jacking, and jacking the special-shaped net frame to a designed height; welding and fixing the whole middle net frame and the peripheral net frames; and (5) mounting a support, and putting the net rack on the support integrally. The lifting of the part of the net rack after welding is used for welding and splicing the rest part of the net rack, so that the construction welding difficulty is reduced, the construction efficiency is improved, and the welding seam quality of the welding seam at the fluctuated position of the net rack is ensured.
Description
Technical Field
The invention relates to the technical field of net rack installation, in particular to an integral jacking construction method for a deformed steel net rack with a height difference in support installation.
Background
The net rack roof bearing system is a space structure, has the advantages of novelty, attractiveness, unique shape, good comprehensive economic index, high rigidity, good integrity and shock resistance, light dead weight and the like, and is widely applied to the field and hall engineering of municipal and public buildings and the like. The spatial structure of the net rack is divided into a truss system net rack and a pyramid system net rack according to the composition mode. The pyramid system is divided into a triangular pyramid system, a quadrangular pyramid system and a hexagonal pyramid system, and mainly comprises ball nodes and connecting rods, wherein the ball nodes are divided into welding ball nodes and bolt ball nodes.
Most rack is mostly symmetrical structure, can weld the rack at ground whole earlier during the installation, then carry out integral hoisting. Or the blocks and the strips are locally welded into a whole, and after local hoisting, the local net racks are welded and connected at the height of the installation finished surface. The construction method is suitable for the grid structure which is integrally symmetrical, and the installation heights of the grid structures are on the same elevation height surface or the installation elevations have small difference.
However, in order to meet the requirements of main structure, modeling design and the like in some public buildings, the net rack design may have asymmetric and special-shaped structures, if the engineering net rack is designed into a wave shape, the installation elevations of the supports which are symmetrical along the axis have larger difference, and the elevation difference between the highest support and the lowest support is as much as 9.5 m. If the integral hoisting construction method after the integral welding is adopted for hoisting the net rack, cracks are easy to appear on the welding line along the line segment of the highest point support of the net rack or the line segment of the lowest point support under the self-weight action of the ball nodes and the rod pieces, so that the construction quality is reduced, and potential safety hazards are caused; if a construction method of high-altitude welding connection is adopted after the block, strip, assembly and hoisting, the net rack is wavy, so that the precision of the welding positions of the connecting rods and the ball nodes is difficult to control during high-altitude splicing welding, the construction quality is poor, and the safety operation risk is high.
Disclosure of Invention
The patent provides a construction method for integrally jacking a deformed steel net rack with a height difference in support installation, aiming at the problems of large installation difficulty of the net rack, low construction quality and high safety operation risk in the installation process of the net rack.
In order to achieve the purpose, the invention provides the following scheme:
the integral jacking construction method for the deformed steel net rack with the height difference during the installation of the support comprises the following steps:
s1, dividing the middle part of the special-shaped net rack into a plurality of sections of net racks at two sides of the lowest point inflection point;
s2, assembling and welding the first-section net rack, and jacking the first-section net rack once after the first-section net rack is welded;
s3, sequentially assembling and welding the first section of net rack to form a later section of net rack;
s4, repeating the steps S2-S4;
s5, performing secondary jacking after welding all the intermediate net racks, and jacking the special-shaped net rack to a designed height;
s6, welding and fixing the whole middle net rack and the peripheral net racks;
and S7, mounting a support, and placing the whole net rack on the support.
Further, in step S2, the height of the first jacking is satisfied after the first jacking is spliced with the next rack, and the horizontal section at the tail of the next rack is parallel to the ground plane.
Further, in the steps S2 and S3, the wire frame is temporarily supported during the step-by-step welding process.
Further, the secondary jacking height is greater than the mounting height of the support.
Further, the support includes rack welding ball, ball internal stay, a support section of thick bamboo, four sides are supported, bottom plate, perpendicular rubber elastic support, pre-buried piece group, cross shear key, embedded steel bar, perforation plug weld and location cushion, cross shear key and pre-buried steel bar setting are in concrete column, the concrete column top is equipped with pre-buried piece group, pre-buried steel bar bottom sets up location cushion, its top with pre-buried piece group perforation plug weld pre-buried piece group top connects gradually perpendicular rubber elastic support and bottom plate, fixed connection support section of thick bamboo on the bottom plate, set up four sides around the support section of thick bamboo and support, be equipped with the ball internal stay in the rack welding ball, it forms the rack with connecting the member welding, the ball node on the rack fall on the support.
Further, the net rack comprises a lower chord ball joint, an upper chord ball joint, a lower chord member and an upper chord member, wherein the lower chord ball joint, the upper chord ball joint, the lower chord member and the upper chord member are connected with one another to form the net rack.
Further, it is right to adopt jacking equipment the rack carries out the jacking, jacking equipment equidistant evenly distributed is in on the rack, jacking equipment is hydraulic pressure jacking equipment.
Compared with the prior art, the invention has the beneficial effects that:
1. the special-shaped net rack with the wave-shaped design improves the requirement on building attractiveness;
2. after the net rack part is welded, the net rack part is lifted to weld and splice the rest net racks, so that the construction welding difficulty is reduced, the construction efficiency is improved, and the welding seam quality of the welding seam at the fluctuated position of the net racks is ensured;
3. after the ground is integrally welded, the jacking installation reduces the work load of high-altitude operation and reduces the risk of high-altitude operation.
Drawings
FIG. 1 is a schematic view of a grid according to the present invention;
FIG. 2 is a cross-sectional view taken along line 1-1 of FIG. 1 in accordance with the present invention;
FIG. 3 is a schematic view of the welding of a part of the net frame in embodiment 1 of the present invention;
FIG. 4 is a schematic illustration of the splicing of a portion of the racks 1 and a portion of the racks 2 in an embodiment of the present invention;
FIG. 5 is a schematic view showing welding of a part of the net frame 1 and a part of the net frame 2 according to an embodiment of the present invention;
FIG. 6 is a layout diagram of the positions of hydraulic devices in the embodiment of the present invention;
FIG. 7 is a schematic view of a post-welded portion of the pedestal of the present invention
FIG. 8 is a schematic view of a mount of the present invention;
FIG. 9 is a cross-sectional view of the stand of the present invention;
FIG. 10 is a schematic view of a fastener insert assembly according to the present invention;
FIG. 11 is a cross-sectional view taken along line 2-2 of FIG. 10 in accordance with the present invention;
in the figure, 1-net frame welding ball; 2-internal support of the ball; 3-a support cylinder; 4-four-side support; 5-a bottom plate; 6-vertical rubber elastic support; 7-embedding a group of embedded pieces; 8-cross shear key; 9-embedding reinforcing steel bars; 10-plug welding of the through hole; 11-positioning the cushion block; 12-a top chord ball node; 13-lower chord member; 14-upper chord member; 15-lower chord sphere node; 16-jacking equipment; 17-structural corbels; 18-structural pillars; 19-a support; 20-a net rack.
Detailed Description
The technical solution and the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.
For a better understanding of the present invention, the present invention is further illustrated below with reference to specific examples, which are provided for the purpose of illustration only and are not intended to limit the scope of the present invention. In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-11, the invention is described by taking a wavy line special-shaped net frame as an example, two sides of the inflection point of the lowest point are divided into a net frame 1 part and a net frame 2 part, and the net frames are spliced and welded on the ground level.
In the embodiment, the support 19 comprises a net rack welding ball 1, a ball inner support 2, a support cylinder 3, a four-side support 4, a bottom plate 5, a vertical rubber elastic support 6, an embedded group 7, a cross shear key 8, embedded steel bars 9, a perforation plug welding 10 and a positioning cushion block 11, the cross shear key 8 and the embedded steel bars 9 are arranged in the concrete column, the top end of the concrete column is provided with an embedded piece group 7, the bottom of the embedded steel bars 9 is provided with a positioning cushion block 11, the top of the rubber elastic support is in plug welding 10 with the through hole of the embedded piece group 7, the top of the embedded piece group 7 is sequentially connected with a vertical rubber elastic support 6 and a bottom plate 5, a supporting cylinder 3 is fixedly connected on the bottom plate 5, four-side supports 4 are arranged around the supporting cylinder 3, a ball inner support 2 is arranged in the net rack welding ball 1, which is welded with connecting rods to form a net frame 20, and the ball nodes on the net frame 20 are fallen on the supporting seat 19.
The net rack 20 comprises a lower chord ball node 15, an upper chord ball node 12, a lower chord member 13 and an upper chord member 14, wherein the lower chord ball node 15, the upper chord ball node 12, the lower chord member 13 and the upper chord member 14 are connected with each other to form the net rack 20. Adopt jacking equipment 16 right the rack carries out the jacking, 16 equidistant evenly distributed of jacking equipment are in on the rack, jacking equipment 16 is hydraulic pressure jacking equipment.
The elevation difference of the high position and the low position of the net rack is larger, and 1 part of the net racks are assembled and welded firstly when the net racks are welded. And attention is paid to the temporary support of the net rack in the step-by-step welding process, so that the cracks of the welding line in the net rack welding process are avoided. The temporary support can be made of brick blocks, and a support 19 is arranged at the top of each brick block; after welding is finished, checking and accepting the quality of the welding seam; according to the position of the design scheme, fixing No. 1-4 hydraulic jacking equipment, wherein a hydraulic jack is adopted in the embodiment; after the net rack 1 part is integrally welded, hydraulic jacking equipment is adopted to jack the net rack 1 part, the jacking height meets the requirement that after the net rack 2 part is spliced, the horizontal section at the tail part of the net rack 2 part is parallel to the ground plane; the net rack 2 is assembled and welded, and the temporary support is also adopted to support the net rack during assembling and welding; fixing a No. 5-6 hydraulic jack according to the position of the design scheme; welding and connecting the net rack 1 part and the net rack 2 part; checking and accepting the quality of the welding seam after welding; after the support 19 is installed, the No. 1-6 hydraulic jacks are simultaneously lifted at a constant speed, and the lifting height is slightly greater than the installation height of the support 19; mounting a support 19, wherein the support 19 is mounted on a structural column 18 or a structural bracket 17, and embedded parts are embedded and accepted during the construction of a main body structure; the connection positions of the peripheral net frame and the middle net frame with the support 19 are welded with ball joints and connecting rods; the hydraulic jack is evenly decompressed, and the net rack falls on the support 19; and (4) checking and accepting the welding seam at the position of the support 19.
Finally, it should be noted that: the above is only used to illustrate the technical solution of the present invention, and not to limit it; although the invention has been described in detail with reference to specific embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may be modified or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The integral jacking construction method for the deformed steel net rack with the height difference during the installation of the support is characterized by comprising the following steps of:
s1, dividing the middle part of the special-shaped net rack into a plurality of sections of net racks at two sides of the lowest point inflection point;
s2, assembling and welding the first-section net rack, and jacking the first-section net rack once after the first-section net rack is welded;
s3, sequentially assembling and welding the first section of net rack to form a later section of net rack;
s4, repeating the steps S2-S4;
s5, performing secondary jacking after welding all the intermediate net racks, and jacking the special-shaped net rack to a designed height;
s6, welding and fixing the whole middle net rack and the peripheral net racks;
and S7, mounting a support, and placing the whole net rack on the support.
2. A method for integrally jacking a deformed steel grid with a height difference during the installation of a support according to claim 1, wherein in step S2, the height of the jacking is such that after the jacking is spliced with the next grid, the horizontal section at the tail of the next grid is parallel to the ground level.
3. A method for integrally jacking a deformed steel wire frame with a height difference in a support installation process according to claim 1, wherein in the steps S2 and S3, the temporary support of the wire frame is made during the step-by-step welding process.
4. The integral jacking construction method for the support-mounted deformed steel grid with the height difference as claimed in claim 1, wherein the secondary jacking height is greater than the support mounting height.
5. The integral jacking construction method of a deformed steel grid frame with a height difference for installing a support according to claim 1, it is characterized in that the support comprises a net rack welding ball, a ball inner support, a support cylinder, a four-side support, a bottom plate, a vertical rubber elastic support, an embedded member group, a cross shear key, an embedded steel bar, a perforation plug welding and a positioning cushion block, the cross shear key and the embedded steel bars are arranged in the concrete column, the top end of the concrete column is provided with an embedded piece group, the bottom of the embedded steel bars is provided with a positioning cushion block, the top of the rubber elastic support is plug welded with the through hole of the embedded part group, the top of the embedded part group is sequentially connected with a vertical rubber elastic support and a bottom plate, a support cylinder is fixedly connected on the bottom plate, four-side supports are arranged around the support cylinder, a ball inner support is arranged in the net rack welding ball, the ball joint is welded with the connecting rod piece to form a net rack, and the ball joint on the net rack is located on the support.
6. A method for integrally jacking a profiled steel wire frame with height difference for installing supports according to claim 1, wherein the wire frame comprises a lower chord sphere node, an upper chord sphere node, a lower chord member and an upper chord member, and the lower chord sphere node, the upper chord sphere node, the lower chord member and the upper chord member are connected with each other to form the wire frame.
7. The integral jacking construction method for the deformed steel grid with the height difference during the installation of the support according to claim 1, wherein jacking equipment is adopted to jack the grid, the jacking equipment is uniformly distributed on the grid at equal intervals, and the jacking equipment is hydraulic jacking equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111259982.2A CN113833279A (en) | 2021-10-28 | 2021-10-28 | Integral jacking construction method for deformed steel net rack with height difference during mounting of support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111259982.2A CN113833279A (en) | 2021-10-28 | 2021-10-28 | Integral jacking construction method for deformed steel net rack with height difference during mounting of support |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113833279A true CN113833279A (en) | 2021-12-24 |
Family
ID=78966135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111259982.2A Pending CN113833279A (en) | 2021-10-28 | 2021-10-28 | Integral jacking construction method for deformed steel net rack with height difference during mounting of support |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113833279A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809310A (en) * | 2022-06-24 | 2022-07-29 | 天津医科大学 | Large-span steel truss high-altitude integral variable-angle jacking construction method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002047730A (en) * | 2000-08-02 | 2002-02-15 | Shimizu Corp | Roof structure |
| CN102660996A (en) * | 2012-05-29 | 2012-09-12 | 广西建工集团第五建筑工程有限责任公司 | Multilevel multi-curve single-layer welding ball steel structure net rack and construction method thereof |
| CN105089152A (en) * | 2015-07-10 | 2015-11-25 | 中铁十八局集团建筑安装工程有限公司 | Reverse installation and construction method for large bifurcated column and complex curved net rack |
| CN111335476A (en) * | 2020-04-02 | 2020-06-26 | 山东天齐置业集团股份有限公司 | Staggered floor steel mesh frame subsection lifting accumulative assembling construction method |
-
2021
- 2021-10-28 CN CN202111259982.2A patent/CN113833279A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002047730A (en) * | 2000-08-02 | 2002-02-15 | Shimizu Corp | Roof structure |
| CN102660996A (en) * | 2012-05-29 | 2012-09-12 | 广西建工集团第五建筑工程有限责任公司 | Multilevel multi-curve single-layer welding ball steel structure net rack and construction method thereof |
| CN105089152A (en) * | 2015-07-10 | 2015-11-25 | 中铁十八局集团建筑安装工程有限公司 | Reverse installation and construction method for large bifurcated column and complex curved net rack |
| CN111335476A (en) * | 2020-04-02 | 2020-06-26 | 山东天齐置业集团股份有限公司 | Staggered floor steel mesh frame subsection lifting accumulative assembling construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114809310A (en) * | 2022-06-24 | 2022-07-29 | 天津医科大学 | Large-span steel truss high-altitude integral variable-angle jacking construction method |
| CN114809310B (en) * | 2022-06-24 | 2022-09-27 | 天津医科大学 | Large-span steel truss high-altitude integral variable-angle jacking construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113719139B (en) | Construction method for hoisting irregular space net rack of stadium | |
| CN113882712B (en) | Temporary support reinforcing method for large-scale suspension type steel structure construction | |
| CN102179651A (en) | On-site plane trusses of extra-large welded ball net frame and method for splicing three-dimensional sections | |
| CN114525877B (en) | Stadium combined roof based on large cantilever inclined triangular truss and construction method | |
| CN111779274A (en) | Construction method for integrally lifting temporary hoisting point of large-span unequal-height steel structure net rack | |
| CN111877773A (en) | Installation method of large-span annular pressure ring single-layer grid steel roof | |
| CN113833279A (en) | Integral jacking construction method for deformed steel net rack with height difference during mounting of support | |
| CN105480002A (en) | Single-layer steel structure decoration tree and mounting method thereof | |
| CN112112284A (en) | Integral jacking construction method for net rack | |
| CN114837483B (en) | High-low span portal steel frame building structure and construction process thereof | |
| CN114941433B (en) | Construction method of high-weight ship type daylighting roof steel structure | |
| CN113756504B (en) | Construction method of right-angle aluminum alloy latticed shell with external corners | |
| CN216194062U (en) | Temporary support structure | |
| CN116480184A (en) | Tree-shaped supporting system at main entrance of steel structure and construction method thereof | |
| CN213774620U (en) | Temporary support system for inverse installation of steel truss hanging structure | |
| CN114837090A (en) | Combined support system for high tower beam construction and construction method | |
| CN210917011U (en) | Cable tower structure and bridge | |
| CN109469257B (en) | Large-span gradual-change polygonal cross section parallel truss roof and construction method | |
| CN111608270A (en) | Prefabricated through long column concrete assembled frame structure and construction method thereof | |
| CN219825607U (en) | Combined lifting support for integrally lifting grid structure | |
| CN216108122U (en) | Ladder cage suitable for construction of pier bodies with various cross-sectional sizes | |
| CN217028054U (en) | Small-radius semicircular arch wall non-floor support device | |
| CN219753487U (en) | Supporting beam structure in large-span floor slab | |
| CN117661856A (en) | Large-span net rack installation construction method | |
| CN108019057B (en) | Tower footing steel structure for transferring component load and installation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20211224 |
|
| RJ01 | Rejection of invention patent application after publication |