CN111794524A - Bolt ball steel pipe net rack segmented hoisting and high-altitude scattered splicing combined installation construction process - Google Patents
Bolt ball steel pipe net rack segmented hoisting and high-altitude scattered splicing combined installation construction process Download PDFInfo
- Publication number
- CN111794524A CN111794524A CN202010660297.XA CN202010660297A CN111794524A CN 111794524 A CN111794524 A CN 111794524A CN 202010660297 A CN202010660297 A CN 202010660297A CN 111794524 A CN111794524 A CN 111794524A
- Authority
- CN
- China
- Prior art keywords
- net rack
- construction
- assembling
- altitude
- ball
- 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
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
Abstract
The invention discloses a construction process for sectional hoisting and high-altitude scattered splicing combined installation of a bolt ball steel pipe net rack, which comprises the following steps of: (1) construction preparation, (2) paying off, (3) installing a net rack support, (4) assembling a starting cross net rack on the ground, (5) hoisting the starting cross net rack, (6) correcting the starting cross net rack, (7) assembling at high altitude, (8) checking the rack, and (9) checking. The process has the advantages of convenient operation, high construction speed, excellent quality, labor saving and the like, and meets the requirements of energy conservation and environmental protection. The construction method can effectively carry out construction procedures of bulk lifting, loose splicing, slippage, assembly and the like at the same time, improves the construction progress, saves a large number of construction periods, is flexible and changeable in construction, and has obvious social and environmental benefits for responding to national calls and popularizing energy-saving green and environment-friendly materials.
Description
Technical Field
The invention relates to a bolt ball steel pipe net rack sectional hoisting and high-altitude scattered splicing combined installation construction process, and belongs to the technical field of building construction.
Background
With the development of modern science and technology, bolt ball steel pipe grid structures are more and more applied to industrial plants and large public buildings. The bolt ball steel pipe net rack is installed in a plurality of ways, and the general installation method of the bolt ball steel pipe net rack is to carry out integral hoisting by large-scale hoisting equipment, or to set up a full scaffold construction platform to the elevation of the steel pipe net rack, and then to install the steel pipe net rack on the construction platform. The construction method is often difficult to construct, and the weight of a construction site and a hoisting net rack is easily limited; or a large number of support frames and protective frame bodies need to be erected, so that the requirements on economy and safety cannot be met. The method integrates the advantages of a plurality of installation methods, adopts the scheme that part of the net rack main body is assembled on the ground firstly, is lifted and installed in place by adopting an automobile crane, and then the net rack main body at the rest part is installed by using a high-altitude bulk method, so that the requirements of construction progress and engineering quality are met, and the construction safety and the structure safety are ensured. In the construction process, the company explores and researches a construction method combining sectional hoisting and a high-altitude slip method for the bolt ball steel pipe net rack, and carries out practical application in projects, so that a construction method combining sectional hoisting and high-altitude loose assembly and installation of the bolt ball steel pipe net rack is formed.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: provides a construction process for sectional hoisting and high-altitude scattered splicing combined installation of a bolt ball steel pipe net rack.
The method specifically comprises the following steps:
(1) construction preparation, (2) paying off, (3) installing a net rack support, (4) assembling a starting cross net rack on the ground, (5) hoisting the starting cross net rack, (6) correcting the starting cross net rack, (7) assembling at high altitude, (8) checking the rack, and (9) checking.
The steel net rack engineering is a bolt ball joint net rack. The net rack adopts a unit span assembled on the ground outside the building as a starting net rack, the unit span is hoisted by a 160-ton crane, and the rest part is bulk-loaded in the air by a tower crane or an electric hoist.
The concrete steps of step (3) rack support installation do:
the net rack is installed and measured at the same time, and error is adjusted in time. Firstly, calculating the Z coordinate and the height difference of each lower chord ball according to the coordinates of the bolt ball nodes in a drawing, then building brick piers on the ground according to the sizes of the inter-shaft net rack balls, respectively measuring central cross lines on the brick piers, determining the positions of the bolt ball nodes by using rod positioning rings, connecting and assembling inter-node rod pieces to form a lower chord quadrilateral unit grid, positioning the upper chord central ball by using web members, enabling the center of the upper chord ball to be matched with the position of a ground projection center, and connecting and assembling other web members to form a small unit reference control point. All the bolt balls and the rod pieces from the ZD shaft to the ZE shaft are sequentially arranged according to the method,
after all the net rack balls and rod pieces are assembled between the shafts, a 160T crane is selected to position six hanging points at the positions of the bolt balls hung below the net rack respectively to hoist the unit, the position of the support is adjusted, and then the net rack is closely matched with a tower crane to carry out high-altitude bulk loading on the net rack by the remaining side of the net rack.
The step (7) of high-altitude assembling specifically comprises the following steps:
high-altitude bulk construction: firstly, assembling a net rack triangular cone small unit cone on a floor below a net rack according to a construction drawing sequence, wherein the assembling sequence of the unit cones is lower chord, diagonal rod and upper chord, and the assembling method comprises the following steps: and assembling the triangular cone on the ground near the actual projection position of the mounting point. A ball and four rod pieces are a small unit, and two small units can form a grid. And sequentially hoisting the base plates to the mounting position by a ground crane or a tower crane, and completing the connection of high-altitude nodes by mounting personnel at the position. When assembling the small triangular cone unit, the ball and the rod piece at the position are found and matched, one team member finds the position of the ball hole, the two chord members are respectively butted, the sleeve nut is screwed by a spanner or a pipe wrench, the other chord member (the upward chord member) is screwed, the fourth chord member (the wing) is screwed after the three rod members are screwed in place, and finally the support net rack is installed in place. In the tightening process, in order to completely tighten the rod piece and the ball in place, a method of shaking the rod piece while screwing can be adopted. And (4) paying attention to that the assembled triangular cones need to be stacked orderly when being stacked, a vehicle and a walking channel are reserved, and whether all the bolts at each connecting position are screwed down or not is checked after the assembly is finished and the requirements are met.
When the high-altitude bulk is carried out, a safety pocket net is arranged below the high-altitude bulk to ensure the safety of personnel. When working aloft, the safety belt is tied, the safety belt is hung at a firm and reliable position above the safety belt, and the height of the safety belt is not lower than the waist;
the characteristics of the method of the invention
1 the construction method can effectively carry out construction procedures such as loose assembly, hoisting, loose assembly and the like at the same time, improves the construction progress, saves a large amount of construction period, and the construction is flexible and changeable.
2 no need of large mechanical equipment and full scaffold tools during construction, and reduced construction cost.
3 the time of steel pipe net rack installation worker working aloft is reduced, the potential safety hazard in the construction process is reduced.
4 the net rack subsection ground assembling difficulty is low, the positioning is accurate, the construction speed is high, and the construction period is saved.
The application range of the invention is as follows:
the construction method is suitable for the construction of the steel mesh frame integral lifting project of the medium-sized industrial factory building or the large-span public building. The method is particularly suitable for the construction of the large-span steel net rack installation project under the narrow and small condition of the construction site.
The process principle of the invention is as follows:
assembling partial net rack sections on the ground, hoisting and installing the net rack sections by using a truck crane, assembling dispersed net rack limbs into a single strip shape on a roof plane by adopting a high-altitude sliding installation method, arranging supporting points at two end parts, sliding one net rack unit on a preset sliding rail to a designed position, and combining the net rack units one by one.
Technical level and technical difficulty (including comparison with similar technical levels at home and abroad):
the traditional installation method of the bolt ball steel pipe net rack has high construction difficulty, and the weight of a construction site and a hoisting net rack is easily limited; or a large number of support frames and protective frame bodies need to be erected, so that the requirements on economy and safety cannot be met. According to the construction method, the local hoisting and high-altitude scattered splicing combined installation construction method is adopted, the original high-altitude splicing work or integral ground splicing is changed into a construction method of combining hoisting with high-altitude sliding installation after local ground splicing, the lease expense of the scaffold, the setting and dismantling expense and the large-scale mechanical expense are greatly reduced, the construction efficiency is improved, the construction period is shortened, and good economic benefits are achieved. The construction method is flexible and changeable in construction, all the procedures can be constructed in a crossed mode, large-scale mechanical equipment is not needed, extra fields are not occupied, and good social benefits are achieved.
The construction method can effectively carry out construction procedures such as loose assembly, hoisting and loose assembly at the same time, improves the construction progress, saves a large amount of construction period by , and is flexible and changeable in construction. Large-scale mechanical equipment and full scaffold materials are not needed in the construction process, and the construction cost is reduced. Reduce steel pipe rack installer high altitude construction time, reduce the potential safety hazard in the work progress. ) The net rack sectional ground assembly difficulty is low, the positioning is accurate, the construction speed is high, and the construction period is shortened
In conclusion, the construction method has the advantages of reasonable process, mature technology, strong applicability and operability, innovation of key technology, and realization of the key technology level reaching the domestic advanced level.
The construction method has the following application conditions and popularization and application prospects:
according to the construction method, the local hoisting and high-altitude scattered splicing combined installation construction method is adopted, the original high-altitude splicing work or integral ground splicing is changed into a construction method of combining hoisting with high-altitude sliding installation after local ground splicing, the lease expense of the scaffold, the setting and dismantling expense and the large-scale mechanical expense are greatly reduced, the construction efficiency is improved, the construction period is shortened, and good economic benefits are achieved. The construction method is flexible and changeable in construction, all procedures can be constructed in a crossed mode, large-scale mechanical equipment is not needed, and extra fields are not occupied. The steel net rack lifting device is suitable for the construction of the integral lifting engineering of the steel net rack of a large industrial factory building or a large-span public building, and is particularly suitable for the construction of the installation engineering of the large-span steel net rack under the narrow condition of a construction site. The construction method is successfully applied to projects of schools (middle schools in the northern village) and national badminton communication centers in Qingdao in the New zone E4-2 of the floating mountains, and has obvious technical and economic effects. Therefore, the construction method has good popularization and application prospects.
Has the advantages that:
1 economic benefits
By adopting the combined installation and construction method of local hoisting and high-altitude scattered splicing, the original high-altitude splicing work or integral ground splicing is changed into the construction method of combining hoisting and high-altitude splicing installation after local ground splicing, thereby greatly reducing the lease expense and the setting and dismantling expense of the scaffold, improving the construction efficiency, shortening the construction period and having good economic benefit. The construction process adopts special mechanical construction, has the advantages of simple and convenient operation and high construction speed, and saves labor cost and management cost. The lifting is stable, the positioning is accurate, and the workload and the maintenance cost of future maintenance are reduced.
2 social and environmental benefits
Saving a large amount of time limit for a project, and the construction is nimble changeable, simultaneously, to responding the national call, promoting energy-conserving green materials, has obvious society and environmental protection benefit. The construction procedures of bulk lifting, splicing, slipping, assembling and the like are effectively carried out simultaneously at , the labor is saved, and the like, and the requirements of energy conservation and environmental protection are met. And the construction progress is improved. The construction method has the advantages of high construction speed, excellent quality and convenient operation.
Detailed Description
Example 1
The bolt ball steel pipe net rack segmented hoisting and high-altitude scattered splicing combined installation construction process provided by the embodiment comprises the following steps:
(1) construction preparation, (2) paying off, (3) installing a net rack support, (4) assembling a starting cross net rack on the ground, (5) hoisting the starting cross net rack, (6) correcting the starting cross net rack, (7) assembling at high altitude, (8) checking the rack, and (9) checking.
The steel net rack engineering is a bolt ball joint net rack. The net rack adopts a unit span assembled on the ground outside the building as a starting net rack, the unit span is hoisted by a 160-ton crane, and the rest part is bulk-loaded in the air by a tower crane or an electric hoist.
The concrete steps of step (3) rack support installation do:
the net rack is installed and measured at the same time, and error is adjusted in time. Firstly, calculating the Z coordinate and the height difference of each lower chord ball according to the coordinates of the bolt ball nodes in a drawing, then building brick piers on the ground according to the sizes of the inter-shaft net rack balls, respectively measuring central cross lines on the brick piers, determining the positions of the bolt ball nodes by using rod positioning rings, connecting and assembling inter-node rod pieces to form a lower chord quadrilateral unit grid, positioning the upper chord central ball by using web members, enabling the center of the upper chord ball to be matched with the position of a ground projection center, and connecting and assembling other web members to form a small unit reference control point. All the bolt balls and the rod pieces from the ZD shaft to the ZE shaft are sequentially arranged according to the method,
after all the net rack balls and rod pieces are assembled between the shafts, a 160T crane is selected to position six hanging points at the positions of the bolt balls hung below the net rack respectively to hoist the unit, the position of the support is adjusted, and then the net rack is closely matched with a tower crane to carry out high-altitude bulk loading on the net rack by the remaining side of the net rack.
The step (7) of high-altitude assembling specifically comprises the following steps:
high-altitude bulk construction: firstly, assembling a net rack triangular cone small unit cone on a floor below a net rack according to a construction drawing sequence, wherein the assembling sequence of the unit cones is lower chord, diagonal rod and upper chord, and the assembling method comprises the following steps: and assembling the triangular cone on the ground near the actual projection position of the mounting point. A ball and four rod pieces are a small unit, and two small units can form a grid. And sequentially hoisting the base plates to the mounting position by a ground crane or a tower crane, and completing the connection of high-altitude nodes by mounting personnel at the position. When assembling the small triangular cone unit, the ball and the rod piece at the position are found and matched, one team member finds the position of the ball hole, the two chord members are respectively butted, the sleeve nut is screwed by a spanner or a pipe wrench, the other chord member (the upward chord member) is screwed, the fourth chord member (the wing) is screwed after the three rod members are screwed in place, and finally the support net rack is installed in place. In the tightening process, in order to completely tighten the rod piece and the ball in place, a method of shaking the rod piece while screwing can be adopted. And (4) paying attention to that the assembled triangular cones need to be stacked orderly when being stacked, a vehicle and a walking channel are reserved, and whether all the bolts at each connecting position are screwed down or not is checked after the assembly is finished and the requirements are met.
When the high-altitude bulk is carried out, a safety pocket net is arranged below the high-altitude bulk to ensure the safety of personnel. When working aloft, the safety belt is tied, the safety belt is hung at a firm and reliable position above the safety belt, and the height of the safety belt is not lower than the waist;
example 2 example of application
1 Floating mountain new region E4-2 plot matching school (middle school in northern village)
1 overview of the engineering. A new floating mountain area E4-2 land parcel is matched with a project of a school (middle school in North village), a construction site is located in Laoshan area No. 117 of Qingdao city, the whole land parcel is in an irregular rectangle shape, the building mainly comprises a comprehensive teaching building, a dining room wind and rain playground and a guard, the total building area is 20225.69 square meters, and the roof of the wind and rain playground adopts a quadrangular pyramid bolt-ball joint double-layer grid structure.
2, construction conditions. A structural form of a square pyramid bolt ball joint double-layer net rack is adopted, the net rack is designed to be supported by multiple column points, the rise of the net rack is 1500, and the column tops are suspended and supported. The roof is made of steel skeleton light net frame plate and water-proof coiled material.
2 Qingdao international badminton exchange center project
1 overview of the engineering. The Qingdao international badminton exchange center project is located in the yellow island development area in Qingdao city, at a cold A area, at the upper ground layer of a badminton stadium, at the two underground layers, and has a frame structure and a building height of 14.00 meters. The roof adopts a welded joint pipe truss.
2, construction conditions. And adopting a positive welding node pipe truss. The roof is made of aluminum-magnesium-manganese alloy rock wool heat-insulating roof boards.
Claims (3)
1. The bolt ball steel pipe net rack sectional hoisting and high-altitude scattered splicing combined installation construction process is characterized by comprising the following steps of:
(1) construction preparation, (2) paying off, (3) installing a net rack support, (4) assembling a starting cross net rack on the ground, (5) hoisting the starting cross net rack, (6) correcting the starting cross net rack, (7) assembling at high altitude, (8) checking the rack, and (9) checking.
2. The construction process according to claim 1, wherein the concrete steps of installing the rack support in the step (3) are as follows:
the measurement is carried out while the net rack is installed, and the error is adjusted in time; firstly, calculating the Z coordinate and the height difference of each lower chord ball according to the coordinates of the bolt ball nodes in a drawing, then building brick piers on the ground according to the sizes of the inter-shaft net rack balls, respectively measuring central cross lines on the brick piers, determining the positions of the bolt ball nodes by using rod positioning rings, connecting and assembling inter-node rod pieces to form a lower chord quadrilateral unit grid, positioning the upper chord central ball by using web members, enabling the center of the upper chord ball to be matched with the position of a ground projection center, and connecting and assembling other web members to form a small unit reference control point; all the bolt balls and the rod pieces from the ZD shaft to the ZE shaft are sequentially arranged according to the method,
after all the net rack balls and rod pieces are assembled between the shafts, a 160T crane is selected to position six hanging points at the positions of the bolt balls hung below the net rack respectively to hoist the unit, the position of the support is adjusted, and then the net rack is closely matched with a tower crane to carry out high-altitude bulk loading on the net rack by the remaining side of the net rack.
3. The construction process according to claim 1, wherein the step (7) of high-altitude assembling comprises the following specific steps:
high-altitude bulk construction: firstly, assembling a net rack triangular cone small unit cone on a floor below a net rack according to a construction drawing sequence, wherein the assembling sequence of the unit cones is lower chord, diagonal rod and upper chord, and the assembling method comprises the following steps: assembling a triangular cone on the ground near the actual projection position of the mounting point; the ball and the four rod pieces are small units, and two small units can form a grid; sequentially hoisting the base material to a mounting position by a ground crane or a tower crane, and completing the connection of high-altitude nodes by mounting personnel at the position; when assembling the small triangular cone unit, firstly finding and matching the ball and the rod piece at the position, finding the position of the ball hole by one player, respectively butting two chord members, screwing a sleeve nut by using a spanner or a pipe wrench, then screwing the upper-side rod, screwing the three rod pieces in place, then screwing the fourth chord member, and finally installing the net rack support in place; in the screwing process, in order to completely screw the rod piece and the ball in place, a method of shaking the rod piece while screwing can be adopted; and (4) paying attention to that the assembled triangular cones need to be stacked orderly when being stacked, a vehicle and a walking channel are reserved, and whether all the bolts at each connecting position are screwed down or not is checked after the assembly is finished and the requirements are met.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010660297.XA CN111794524A (en) | 2020-07-10 | 2020-07-10 | Bolt ball steel pipe net rack segmented hoisting and high-altitude scattered splicing combined installation construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010660297.XA CN111794524A (en) | 2020-07-10 | 2020-07-10 | Bolt ball steel pipe net rack segmented hoisting and high-altitude scattered splicing combined installation construction process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111794524A true CN111794524A (en) | 2020-10-20 |
Family
ID=72811487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010660297.XA Pending CN111794524A (en) | 2020-07-10 | 2020-07-10 | Bolt ball steel pipe net rack segmented hoisting and high-altitude scattered splicing combined installation construction process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111794524A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267568A (en) * | 2020-11-06 | 2021-01-26 | 中铁二十局集团市政工程有限公司 | Steel truss structure sectional hoisting construction method |
| CN112962980A (en) * | 2021-02-22 | 2021-06-15 | 中国二十二冶集团有限公司 | Construction method applying tie method in large-span net frame walking frame |
Citations (5)
| 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 |
| 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 |
| WO2013037253A1 (en) * | 2011-09-14 | 2013-03-21 | 徐州中煤百甲重钢科技有限公司 | Reverse installation construction process of bolt-ball net rack cylindrical shell storage bin |
| CN109138452A (en) * | 2018-10-19 | 2019-01-04 | 青岛建集团有限公司 | Heavy construction bolt sphere steel pipe rack entirety fast lifting construction technology |
| CN109235902A (en) * | 2018-09-26 | 2019-01-18 | 中建钢构有限公司 | Positive quadrangular pyramid bolt-ball net frame multi-point support high-altitude dissipates splicing method |
-
2020
- 2020-07-10 CN CN202010660297.XA patent/CN111794524A/en active Pending
Patent Citations (5)
| 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 |
| 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 |
| WO2013037253A1 (en) * | 2011-09-14 | 2013-03-21 | 徐州中煤百甲重钢科技有限公司 | Reverse installation construction process of bolt-ball net rack cylindrical shell storage bin |
| CN109235902A (en) * | 2018-09-26 | 2019-01-18 | 中建钢构有限公司 | Positive quadrangular pyramid bolt-ball net frame multi-point support high-altitude dissipates splicing method |
| CN109138452A (en) * | 2018-10-19 | 2019-01-04 | 青岛建集团有限公司 | Heavy construction bolt sphere steel pipe rack entirety fast lifting construction technology |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267568A (en) * | 2020-11-06 | 2021-01-26 | 中铁二十局集团市政工程有限公司 | Steel truss structure sectional hoisting construction method |
| CN112267568B (en) * | 2020-11-06 | 2022-05-17 | 中铁二十局集团市政工程有限公司 | Steel truss structure sectional hoisting construction method |
| CN112962980A (en) * | 2021-02-22 | 2021-06-15 | 中国二十二冶集团有限公司 | Construction method applying tie method in large-span net frame walking frame |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102345393B (en) | High-altitude bulk process of bolt ball net frame | |
| CN107524261B (en) | Construction method of roof steel net rack | |
| CN107100358B (en) | Cantilever bracket and bracket body special for unloading-free industrialized safety protection and construction method of cantilever bracket and bracket body | |
| CN105569358A (en) | Construction method of special-shaped curved surface roof with large span and multiple curvatures | |
| CN114086669B (en) | Modularized rapid construction method for large-scale space special-shaped curved surface steel net rack | |
| CN107902545B (en) | Horse way air pipe hoisting construction device and construction method | |
| CN111794524A (en) | Bolt ball steel pipe net rack segmented hoisting and high-altitude scattered splicing combined installation construction process | |
| CN104831939A (en) | Bolt ball welding ball mixed node large span cantilever grid structure construction method | |
| CN101871259B (en) | Building method of integral slip type scaffold used for steel grid construction | |
| CN113123469A (en) | Method for constructing complex curved surface modeling roof grid structure | |
| CN107762161B (en) | A kind of energy-saving assembled system of steel residential structure and installation method | |
| CN106522364B (en) | 'garland' steel structure system for stadium periphery and installation process thereof | |
| CN111980165A (en) | Large-span net rack external-expanding splicing integral jacking construction method | |
| CN201635377U (en) | Rigid suspended type scaffold provided with large-span steel roof equipment pipeline | |
| CN112096090B (en) | Large-span space pipe truss single-point support butt joint step-by-step unloading device and construction method | |
| WO2003048469A1 (en) | Method for constructing tier building and special jack equipment thereof | |
| CN109440942B (en) | Installation structure and construction process of factory building roof grid | |
| CN114837483B (en) | High-low span portal steel frame building structure and construction process thereof | |
| CN111364622A (en) | Construction method of long-span arched net rack strip-shaped building | |
| CN206722428U (en) | A kind of building roof lighting Zhongting steel construction jacking apparatus | |
| CN108442598A (en) | Rack and steel truss light composite board Combined roof construction | |
| CN114033189A (en) | Large-area high-altitude grid structure aluminum grid ceiling construction device and construction method | |
| CN207749859U (en) | A kind of trestle support system for structure floor operation in Large-scale Hoisting equipment | |
| CN207499525U (en) | A kind of installation support construction for the main stage girder steel of theater | |
| CN110593081A (en) | Component hoisting walking foundation for large railway station house under complex environment and construction method |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20201020 |