CN110158826B - Construction method of large-span special-shaped steel keel glass curtain wall - Google Patents
Construction method of large-span special-shaped steel keel glass curtain wall Download PDFInfo
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- CN110158826B CN110158826B CN201910350255.3A CN201910350255A CN110158826B CN 110158826 B CN110158826 B CN 110158826B CN 201910350255 A CN201910350255 A CN 201910350255A CN 110158826 B CN110158826 B CN 110158826B
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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
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/88—Curtain walls
- E04B2/96—Curtain walls comprising panels attached to the structure through mullions or transoms
Abstract
The invention discloses a construction method of a large-span deformed steel keel glass curtain wall, belonging to the technical field of building construction, and the implementation mode of the method is as follows: determining a radial division positioning line and an annular depth control line of the arc-shaped curtain wall according to a curtain wall design construction drawing and field actual measurement, and determining an upright post positioning point; the positioning points of the upright columns are calibrated and checked to be correct, and then the steel keel upright columns are installed; after the upright post is installed, checking and adjusting the radian, the inclination angle and the vertical straightness of the upright post, wherein the highest point of the top hyperbolic arc is ensured to be on the same arc and the same elevation; after the upright posts are installed, positioning the cross beam through glass lattices, installing a steel keel cross beam, and welding one end of the cross beam with the upright posts and hinging the other end of the cross beam with the upright posts; and (5) fully welding and fixing the cross beam and the upright after the installation and the checking are finished, and finishing the positioning of the keel system. The invention can effectively solve the construction problems of positioning of the curtain wall section steel keel system, accurate control of the inclination angle and the radian and the like, thereby improving the construction efficiency.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method of a large-span deformed steel keel glass curtain wall.
Background
At present, the building special work becomes a carrier reflecting the social, economic and technical level and cultural concept of an era, the building aesthetics is gradually improved to a new height, especially, the aesthetic requirements and practicability of public buildings are perfectly combined to be one step, and the high-space glass curtain wall and the special-shaped structure curtain wall are widely applied. At present, glass curtain walls are mostly adopted for decoration in large-scale co-construction projects, and various keels are adopted, including aluminum section keels, profile steel keels, pipe trusses, stay cables, rod cable systems, clamp-shaped steel columns and the like. Compare in aluminium alloy fossil fragments glass curtain wall, the shaped steel fossil fragments glass curtain wall construction precision control degree of difficulty is great, and the construction precision of large-span dysmorphism steel fossil fragments glass curtain wall is more wayward.
Disclosure of Invention
The technical task of the invention is to provide a construction method of a large-span deformed steel keel glass curtain wall aiming at the defects, which can solve the construction problems brought to the concrete construction by the positioning of a curtain wall deformed steel keel system and the accurate control of the inclination angle and the radian, thereby improving the construction efficiency.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a construction method of a large-span deformed steel keel glass curtain wall comprises the following implementation modes:
determining a radial division positioning line and an annular depth control line of the arc-shaped curtain wall according to a curtain wall design construction drawing and field actual measurement, and determining an upright post positioning point;
the positioning points of the upright columns are calibrated and checked to be correct, and then the steel keel upright columns are installed;
after the upright post is installed, checking and adjusting the radian, the inclination angle and the vertical straightness of the upright post, wherein the highest point of the top hyperbolic arc is ensured to be on the same arc and the same elevation;
after the upright posts are installed, positioning the cross beam through glass lattices, installing a steel keel cross beam, and welding one end of the cross beam with the upright posts and hinging the other end of the cross beam with the upright posts;
the cross beam and the upright post are fully welded and fixed after being installed and checked, and the keel system is positioned;
installing a glass plate, gluing and installing a decorative cover plate;
and (5) cleaning and acceptance.
The positioning and inclination angle of the curtain wall keel are strictly controlled through the depth control line and the radial grid positioning line of the arc-shaped curtain wall, so that the precise construction of the large-span deformed steel keel glass curtain wall is ensured.
Preferably, the method comprises the following specific implementation steps:
A. measuring and paying off, rechecking a civil engineering structure, rechecking the position of a front embedded part, determining a radial grid positioning line and a circumferential depth control line of the arc-shaped curtain wall, and determining a stand column positioning point;
rechecking the pre-embedded position according to a drawing, supplementing the post-embedded position with deviation in position, removing a covering layer of the embedded part covered by concrete, polishing rusty embedded parts, and ensuring accurate position and quantity of the embedded part;
the measurement paying-off is the most accurate process for constructing the large-span deformed steel keel glass curtain wall, whether the construction paying-off is accurate or not directly influences the accurate positioning and the control of the inclination angle of the keel of the curtain wall, and the determination of radial division positioning lines and annular depth control lines is the main work of the measurement paying-off;
B. installing an adapter;
C. installing the upright post of the steel keel, and adjusting the circular radian and the inclination angle of the upright post; after all the steel keel columns are positioned, the overall quality and effect can be ensured only if the requirements are met;
D. mounting a cross beam of the steel keel, and integrally adjusting a cross beam system;
when the curtain wall is installed, firstly, the elevation accuracy of the first cross beam below each layer is ensured, a foundation is laid for the installation of the upper cross beam, and the total station is adopted to position the elevation points of the cross beams along the periphery of the curtain wall in a span-by-span manner due to the large span of the curtain wall;
E. fluorocarbon spraying of the steel keel system;
carrying out fluorocarbon spraying three times after polishing the section steel keel, and ensuring that the color is consistent with that of the glass auxiliary frame;
F. fireproof blocking of floors;
G. lightning protection installation;
lightning protection installation is carried out according to the existing national standard of building lightning protection design standard, the curtain wall is required to form a self lightning protection system and is reliably connected with the lightning protection system of the main structure, and the grounding resistance is not more than 4 ohms;
each layer is provided with an equalizing ring to be welded with the embedded part, the support is welded on the embedded part, each layer of stand column is reliably connected through a wire meeting the standard requirement, and the equalizing ring is ensured to be welded and communicated with the main lightning protection rib of the main structure;
H. mounting glass;
and (3) auxiliary frame bonding: the grids of the keels are isosceles trapezoids, the manufacturing cost of the glass is greatly increased if the glass is processed into the trapezoids, the glass is processed into rectangular alignment sheets due to the fact that the size difference between the upper end and the lower end of each piece of glass is not large, and the glass is adjusted into a splayed shape according to the specific size of the keels on site when the auxiliary frames are bonded, so that the phenomenon of wrong platforms cannot be caused when the auxiliary frames and the stand columns are installed;
a pressing plate, an auxiliary frame, a decorative buckle cover and the like matched with the top arc glass are subjected to die sinking processing according to the radian of the keel;
I. gluing;
J. mounting a cover plate;
K. and (5) cleaning and acceptance.
Preferably, determining a circumferential depth control line and a radial division positioning line of the arc-shaped curtain wall, popping the radial division positioning line and the circumferential depth control line on a floor slab through a construction paying-off procedure on site, and performing technical rechecking on the radial division positioning line and the circumferential depth control line.
Furthermore, the radial division positioning line and the annular depth control line are positioned through BIM auxiliary measurement.
Specifically, the specific steps of measuring and paying off the radial dividing positioning line are as follows:
1) respectively bouncing the radial axes on the floor slab and extending the radial axes to the thick edge of the floor slab;
2) the G shaft and the H shaft are two concentric circles (the G shaft and the H shaft here generally refer to any two adjacent circumferential axes), the crossing radial axes of the G shaft and the H shaft are connected by point connecting lines to form a straight line AB and a straight line CD, and the straight line AB and the straight line CD are bounced on a floor slab;
3) respectively dividing the straight lines AB and CD into ten equal parts, connecting the ten equal parts into lines and extending to the edge of the floor plate;
4) the radial ten-equal-division control line is implemented to each layer of each span, and the strict paying-off procedure cannot be carried out by pushing one end to the other end at a fixed distance, so that a larger accumulated error is caused;
5) checking the ejected bisectors between layers, ensuring that the bisectors at the same radial position on the corresponding layer and the roof plate are in a vertical plane passing through the circle center, and ensuring the straightness of the front vertical surface after the main keel is positioned.
And further, checking whether the pre-embedding meets the requirements or not according to the checked bisector, and performing post-compensation secondary pre-embedding on the pre-embedding which does not meet the requirements.
Furthermore, the installation of shaped steel fossil fragments stand uses L type square to check, guarantees that every vertical keel all is along the bisector towards the centre of a circle.
Further, the measurement precision is controlled within 1.5 mm.
Specifically, the specific steps of the measurement and the setting-out of the hoop depth control line are as follows:
1) connecting the H axis with the radial axis point in a straight line to be used as an auxiliary line of the depth control line;
2) finding out depth control points (such as 20 cm of radial distance from the control points to the inner side of the vertical keel) on each radial equal division line according to the auxiliary lines;
3) connecting the depth control points into a line, and checking whether the circular arc degree of the annular depth control line meets the requirement or not;
4) positioning and rechecking keel installation elevations at a corresponding layer and a parapet on the roof by using infrared rays or a leveling instrument according to elevation control points on the H-axis cross radial axis column;
5) and the main keel is positioned after rechecking the depth control line and the installation elevation point. And strictly paying off the line, and implementing to each span of each layer, so as to ensure the construction accuracy, and the radial equal division control line, the circumferential depth control line and the elevation point are not sufficiently or inaccurately measured to directly influence the arc degree and the inclination angle of the keel system and the arc degree and the elevation difference of the top arc peak.
Preferably, all must reach the requirement after the location of steel joist stand and just can guarantee overall quality and effect, the following aspect of steel joist stand installation control: the keel depth is on the same arc surface; the gradients are consistent; the arc keel and the vertical keel are in the same plane; the highest point of the top arc keel is positioned on the same arc line on the same elevation, and the bolt connection quality and the welding seam quality are improved.
When the steel joist crossbeam is installed, the following aspects are mainly controlled: strictly paying off and fixing points for the distance between the cross beams; the cross beams of the continuous curtain wall are strictly controlled on the same elevation line; controlling the quality of the welding seam; one end of the beam is welded with the upright post, and the other end of the beam is hinged with the upright post; the beams are installed in strict order.
Compared with the prior art, the construction method of the large-span deformed steel keel glass curtain wall has the following beneficial effects:
the method utilizes BIM to assist in measuring and positioning, improves the original pure field measuring method, can improve the construction paying-off precision of the long-span special-shaped glass curtain wall and the positioning and mounting accuracy of the curtain wall framework, and solves the construction problems brought to the concrete construction by the positioning of the curtain wall profile steel keel system and the accurate control of the inclination angle and the radian, thereby improving the construction efficiency;
the curved keel, the auxiliary frame and other accessories applied in the method are all processed in a factory scale mode, the processing precision is high, the material waste is less, and the safety and the cleanness of a construction site are guaranteed. The construction method is simple to operate, high in construction speed, high in precision, strong in operability and high in economic benefit.
The construction method is suitable for the installation and construction of the large-span special-shaped steel keel glass curtain wall engineering, such as glass curtain wall engineering in markets, exhibition centers, cultural and artistic communication centers, airports, stadiums and the like.
Drawings
FIG. 1 is a block diagram of a construction process of a large-span deformed steel keel curtain wall construction method of the invention;
FIG. 2 is a schematic view of a measurement positioning line in the embodiment.
In the figure, 1, radial division positioning lines and 2, circumferential depth control lines.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
According to a curtain wall design construction drawing and field actual measurement, determining radial division positioning lines and a circumferential depth control line of the arc-shaped curtain wall to position the upright column, bouncing the radial division positioning lines and the circumferential depth control line on a floor slab through a construction paying-off program on the field, and performing technical recheck on the radial division positioning lines and the circumferential depth control line. For the positioning point of the upright post, the steel keel upright post is installed after being checked and verified; after the upright post is installed, checking and adjusting the radian, the inclination angle and the vertical straightness of the upright post, wherein the highest point of the top hyperbolic arc is ensured to be on the same arc and the same elevation; and after the stand column is installed, the cross beam is positioned through a glass grid, a steel keel cross beam is installed, one end of the cross beam is welded with the stand column, and the other end of the cross beam is hinged with the stand column. And (5) fully welding and fixing the cross beam and the upright after the installation and the checking are finished, and finishing the positioning of the keel system. Installing glass plate, gluing and installing decorative buckle cover.
The specific construction process flow of the method is as follows:
A. measuring and paying off, rechecking a civil engineering structure, rechecking the position of a front embedded part, determining a radial grid positioning line and a circumferential depth control line of the arc-shaped curtain wall, and determining a stand column positioning point;
B. installing an adapter;
C. installing the upright post of the steel keel, and adjusting the circular radian and the inclination angle of the upright post;
D. mounting a cross beam of the steel keel, and integrally adjusting a cross beam system;
E. fluorocarbon spraying of the steel keel system;
F. fireproof blocking of floors;
G. lightning protection installation;
H. mounting glass;
I. gluing;
J. mounting a cover plate;
K. and (5) cleaning and acceptance.
The specific operation is as follows:
preparation work:
rechecking the pre-embedded position according to a drawing, supplementing the post-embedded position with deviation in position, removing a covering layer of the embedded part covered by concrete, polishing rusty embedded parts, and ensuring accurate position and quantity of the embedded part;
and (3) measurement and paying-off:
the measurement paying-off is the most accurate process for the construction of the large-span deformed steel keel glass curtain wall, and whether the construction paying-off is accurate or not directly influences the accurate positioning and inclination angle control of the curtain keel.
And the radial division positioning line and the annular depth control line are positioned through BIM auxiliary measurement.
The determination of the radial division positioning line and the annular depth control line is the main work of measuring the pay-off. The positioning pay-off workload is large, the measurement precision is high, the measurement personnel strictly execute the scheme, and the technical responsible personnel recheck the scheme.
The control of the paying-off process is explained by taking 60-61 axes paying-off as an example. As shown with reference to fig. 2.
1. And (3) measuring and paying off a radial dividing positioning line:
1) respectively bouncing the radial axes on the floor slab and extending the radial axes to the thick edge of the floor slab;
2) the circumferential axes G and H are two concentric circles, the connecting lines of the points of the intersecting radial axes of the G and H are connected into straight lines AB and CD, and the straight lines AB and CD are bounced on the floor slab;
3) respectively dividing the straight lines AB and CD into ten equal parts, connecting the ten equal parts into lines and extending to the edge of the floor plate;
4) the radial ten-equal-division control line is implemented to each layer of each span, and the strict paying-off procedure cannot be carried out by pushing one end to the other end at a fixed distance, so that a larger accumulated error is caused;
5) checking the ejected bisectors among the floors to ensure that the bisectors at the same radial position on the three floors, the four floors and the roof plate are in a vertical plane passing through the circle center, and ensuring the straightness of the front vertical surface after the main keel is positioned;
6) checking whether the pre-embedding meets the requirements or not according to the checked bisector, and performing post-compensation secondary embedding on the embedding which does not meet the requirements;
7) the upright columns of the steel keels are checked by using an L-shaped square ruler, so that each vertical keel is ensured to face the circle center along the bisector;
8) and the measurement precision is controlled within 1.5 mm.
2. And (3) measuring and paying off a hoop depth control line:
1) connecting the H axis with the radial axis point in a straight line to be used as an auxiliary line of the depth control line;
2) finding out a depth control point (the radial distance from the control point to the inner side of the vertical keel is 20 centimeters) on each radial equal division line according to the auxiliary line;
3) connecting the depth control points into a line, and checking whether the circular arc degree of the annular depth control line meets the requirement or not;
4) according to the elevation control points on the H-axis cross radial axis column, positioning and rechecking the installation elevations of the keels at the positions of the three layers, the four layers and the roof parapet by using infrared rays or a leveling instrument;
5) and the main keel is positioned after rechecking the depth control line and the installation elevation point. And strictly paying off the line, and implementing to each span of each layer, so as to ensure the construction accuracy, and the radial equal division control line, the circumferential depth control line and the elevation point are not sufficiently or inaccurately measured to directly influence the arc degree and the inclination angle of the keel system and the arc degree and the elevation difference of the top arc peak.
3. Installing the steel keel upright post:
all must reach the requirement after the location of shaped steel keel stand and just can guarantee overall quality and effect, five aspects of quality of shaped steel keel column mouting main control: firstly, the depth of the keel is on the same arc surface; secondly, the inclination is consistent; thirdly, the arc keel and the vertical keel are in the same plane; fourthly, the highest point of the top arc keel is positioned on the same arc line on the same elevation, and fifthly, the bolt connection quality and the welding seam quality are obtained.
4. Installing a steel keel beam:
the elevation accuracy of the first cross beam below each layer is guaranteed firstly when the steel joist cross beam is installed, a foundation is laid for installation of the cross beam above, and the total station is adopted to gradually span the height points of the positioning cross beams along the periphery of the curtain wall due to the large span of the curtain wall. When the device is installed, the quality of the following five aspects is mainly controlled: firstly, strictly paying off and fixing points are needed for the beam spacing; secondly, the cross beams of the continuous curtain wall are strictly controlled on the same elevation line; thirdly, controlling the quality of the welding seam; fourthly, one end of the cross beam is welded with the upright post, and the other end of the cross beam is hinged with the upright post; fifthly, the installation sequence of the cross beams is carried out.
5. Fluorocarbon spraying of the steel keel system;
carrying out fluorocarbon spraying three times after polishing the section steel keel, and ensuring that the color is consistent with that of the glass auxiliary frame;
6. lightning protection installation;
the lightning protection installation is carried out according to the existing national standard of building lightning protection design standard, the curtain wall is required to form a self lightning protection system and is reliably connected with the lightning protection system of the main structure, and the grounding resistance is not more than 4 ohms.
The equalizing ring is arranged on each layer and welded with the embedded part, the support is welded on the embedded part, the stand columns on each layer are reliably connected through wires meeting the standard requirements, and the equalizing ring is ensured to be communicated with the main lightning protection main rib of the main structure in a welding mode.
7. Mounting glass;
and (3) auxiliary frame bonding: the grid of fossil fragments is isosceles trapezoid, and glass can increase a lot if processing into trapezoidal cost, and considering that the upper end of every glass is not big with the lower extreme size difference, glass processes into the neat piece of rectangle, adjusts into the splayed according to the concrete size of on-the-spot fossil fragments when the subframe bonds, can guarantee like this that the wrong platform phenomenon can not produce when installing between subframe and the stand.
And a pressing plate, an auxiliary frame, a decorative buckle cover and the like matched with the top arc glass are subjected to die sinking processing according to the radian of the keel.
For materials and equipment, the present embodiment mainly includes the following materials:
glass: the glass adopts 6+12A +6Low-E toughened hollow glass, 6+9A +4+1.14PVB +4 toughened hollow Low-E safety laminated glass and 5+9A +5+1.14PVB +5 bent toughened hollow Low-E safety laminated glass on the top.
Keel: the vertical keel adopts a 120X 60X 4 fluorocarbon spraying steel square pipe, and the horizontal keel adopts a 60X 4 fluorocarbon spraying steel square pipe.
Aluminum profile: mainly comprises a glass auxiliary frame, a decorative buckle cover and a top hyperbolic arc part section bar, and is subjected to die sinking and sizing processing according to radian.
Hardware and other accessories: stainless steel screw, handle, lock, wind brace, sliding brace, stopper etc..
Gluing: the sealant is neutral silicone sealant, and the structural adhesive is double-component neutral silicone weather-resistant structural adhesive.
Mainly comprises the following construction machines (table 1):
TABLE 1 required planning for machines and tools
For quality control:
the glass curtain wall engineering is constructed and installed according to the standard such as glass curtain wall engineering technical specification JGJ102-2003, building decoration and decoration engineering quality acceptance specification GB50210-2001 glass curtain wall engineering quality inspection standard JGJ/T139-2001 and the deepened design construction drawing strictly.
For the glass curtain wall, a structural design calculation book is required; the design scheme of a construction unit can be constructed after the drawing is checked and qualified through the original design, and the safety of the structure is ensured.
The quality of the materials, particularly the structural adhesive, various materials have no qualification certificate and the inspection report is not accepted.
Tightly controlling the construction process; the following aspects must be critically controlled:
1. the post-positioned shaped chemical bolt is subjected to comprehensive inspection and acceptance and must be subjected to a field anti-drawing test;
2. the welding of the connecting piece is to be comprehensively checked, the embedded steel plate and the connecting corner brace are welded in a surrounding way at three sides, the height of a welding leg is more than 6mm, and the length and the height of a welding seam are ensured;
3. the anticorrosion treatment of the connecting angle brace, the embedded steel plate and the rear steel plate is carried out, and the omission is avoided in the total inspection;
4. and whether the pay-off is correct or not is checked, and the reference line is provided by a civil engineering construction unit.
The qualification certificate and the detection report of aluminum profiles, glass, structural adhesive, weather-resistant adhesive, steel and hardware fittings.
The structural bonding material adopted by the hidden frame curtain wall and the semi-hidden frame curtain wall is neutral silicone structural sealant, and the performance of the structural bonding material is in accordance with the specification of silicone structural sealant for buildings (GB 16776); the silicone structural sealant must be used within a useful life. The silicone structural sealant used in the curtain wall engineering is a product qualified by detection of a legal detection mechanism, and materials in contact with the silicone structural sealant, such as aluminum alloy sections, glass, double-sided tapes, silicone weather-resistant sealants, plastic foam rods and the like, selected in the curtain wall engineering need to be subjected to compatibility tests and bonding stripping tests before use, and the sealant can be applied after the tests are qualified.
Before construction, the constructors carry out technical intersection on the quality and the operation requirements of the construction part, so that each construction operator has a plurality of intentions.
The embedded part is prevented from deviating and being buried in a leakage way, a specially-assigned person is required to operate and monitor during embedding, installation is carried out strictly according to the drawing requirements, and the accuracy of the position of the embedded part is guaranteed.
The installation of the curtain wall stand column, the cross beam and the main accessories is strictly constructed according to design drawings and standard requirements, and if the installation is found not to be in accordance with the construction quality standard, the construction quality of the stand column, the cross beam and the main accessories is ensured.
All materials are required to meet the requirements of design and specification and can be processed, and components and semi-finished products can be delivered after being processed and qualified strictly according to design drawings.
The allowable deviation and the inspection method of the installation of the hidden frame and the semi-hidden frame glass curtain wall are in accordance with the regulations in the table 2.
TABLE 2 permissible deviation and inspection method for installation of hidden frame and semi-hidden frame glass curtain wall
The strict technical line-laying procedure and the technical intersection are powerful guarantee for improving the construction accuracy, and the embodiment is applied to decoration engineering glass curtain walls in stadiums of the Hebei Olympic sports center. Through expert study and team innovation, the construction technology of the large-span special-shaped steel keel glass curtain wall is developed, and the construction method of the large-span special-shaped steel keel glass curtain wall is summarized on the basis, so that the construction problem is effectively solved, and the popularization value is obvious.
The present invention can be easily implemented by those skilled in the art from the above detailed description. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the disclosed embodiments, a person skilled in the art can combine different technical features at will, thereby implementing different technical solutions.
In addition to the technical features described in the specification, the technology is known to those skilled in the art.
Claims (9)
1. A construction method of a large-span deformed steel keel glass curtain wall is characterized in that the method is implemented as follows:
according to curtain design construction drawing and on-the-spot actual measurement, confirm radial box location line and the hoop depth control line of arc curtain, confirm the stand setpoint, the concrete step of radial box location line measurement unwrapping wire is:
1) respectively bouncing the radial axes on the floor slab and extending to the thick edge of the floor slab,
2) the circumferential axes G-axis and the H-axis are two concentric circles, the connecting line of the points of the intersecting radial axes of the G-axis and the H-axis is connected into straight lines AB and CD, and the straight lines AB and CD are bounced on the floor slab,
3) respectively dividing the straight lines AB and CD into ten equal parts, connecting the ten equal parts to form a line and extending to the edge of the floor plate,
4) the radial halving control lines are implemented to each layer across each layer,
5) checking the layers of the ejected bisectors, ensuring that the bisectors at the same radial position on the corresponding layer and the roof plate are in a vertical plane passing through the circle center, and ensuring the straightness of the front vertical surface after the main keel is positioned;
the positioning points of the upright columns are calibrated and checked to be correct, and then the steel keel upright columns are installed;
after the upright post is installed, checking and adjusting the radian, the inclination angle and the vertical straightness of the upright post, wherein the highest point of the top hyperbolic arc is ensured to be on the same arc and the same elevation;
after the upright posts are installed, positioning the cross beam through glass lattices, installing a steel keel cross beam, and welding one end of the cross beam with the upright posts and hinging the other end of the cross beam with the upright posts;
the cross beam and the upright post are fully welded and fixed after being installed and checked, and the keel system is positioned;
installing a glass plate, gluing and installing a decorative cover plate;
and (5) cleaning and acceptance.
2. A construction method of a long-span deformed steel keel glass curtain wall as claimed in claim 1, wherein the method comprises the following steps:
A. measuring and paying off, rechecking a civil engineering structure, rechecking the position of a front embedded part, determining a radial grid positioning line and a circumferential depth control line of the arc-shaped curtain wall, and determining a stand column positioning point;
B. installing an adapter;
C. installing the upright post of the steel keel, and adjusting the circular radian and the inclination angle of the upright post;
D. mounting a cross beam of the steel keel, and integrally adjusting a cross beam system;
E. fluorocarbon spraying of the steel keel system;
F. fireproof blocking of floors;
G. lightning protection installation;
H. mounting glass;
I. gluing;
J. mounting a cover plate;
K. and (5) cleaning and acceptance.
3. The construction method of the large-span profiled steel joist glass curtain wall as claimed in claim 1, wherein the radial grid positioning lines and the circumferential depth control lines of the arc-shaped curtain wall are determined, the radial grid positioning lines and the circumferential depth control lines are popped on the floor slab through a construction line laying program on site, and the circumferential depth control lines and the radial grid positioning lines are subjected to technical recheck.
4. A construction method for a large-span profiled steel joist glass curtain wall as claimed in claim 1 or 3, characterized in that the depth control line and the radial cell positioning line are positioned by means of BIM auxiliary measurement.
5. The construction method of the large-span deformed steel keel glass curtain wall as claimed in claim 1, wherein whether the pre-embedding meets the requirements or not is checked according to the checked bisector, and secondary pre-embedding is performed after the pre-embedding which does not meet the requirements is supplemented.
6. A construction method for a large-span profiled steel joist glass curtain wall as claimed in claim 1, characterized in that the installation of the profiled steel joist upright posts is checked by using L-shaped square ruler to ensure that each vertical joist is towards the center of the circle along the bisector.
7. A construction method of a long span deformed steel joist glass curtain wall as claimed in claim 1, wherein the measurement accuracy is controlled within 1.5 mm.
8. The construction method of the large-span deformed steel keel glass curtain wall as claimed in claim 1, wherein the specific steps of measuring and setting out the annular depth control line are as follows:
1) connecting the H axis with the radial axis point in a straight line to be used as an auxiliary line of the depth control line;
2) finding out a depth control point on each radial equal division line according to the auxiliary line;
3) connecting the depth control points into a line, and checking whether the circular arc degree of the annular depth control line meets the requirement or not;
4) according to elevation control points on the H-axis cross radial axis column, using the infrared rays or the leveling instrument to install elevations at three layers, four layers and a keel at the parapet of the roof for positioning and rechecking;
5) and the main keel is positioned after rechecking the depth control line and the installation elevation point.
9. A construction method for a large-span special-shaped steel keel glass curtain wall as claimed in claim 8, wherein the steel keel vertical column is installed, when the vertical keel is installed, the keel depth is on the same arc surface, the inclination is consistent, the arc keel and the vertical keel are in the same plane, and the highest point of the top arc keel is on the same arc line on the same elevation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910350255.3A CN110158826B (en) | 2019-04-28 | 2019-04-28 | Construction method of large-span special-shaped steel keel glass curtain wall |
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| CN201910350255.3A CN110158826B (en) | 2019-04-28 | 2019-04-28 | Construction method of large-span special-shaped steel keel glass curtain wall |
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