Glass curtain wall with external stepped decorative box and construction method thereof

Abstract

The present invention discloses a glass curtain wall with an external stepped decorative box and a construction method thereof, wherein the glass curtain wall comprises a keel assembly fixed on a round tube crossbeam in a main steel structure, an external stepped decorative box fixed on the keel assembly and a glass assembly, wherein the keel assembly comprises a steel tube column, a sleeve core sleeved between two adjacent upper and lower steel tube columns, and a steel tube crossbeam welded between two adjacent left and right steel tube columns, wherein the steel tube column is fixedly connected to the round tube crossbeam through a corbel connector, and the external stepped decorative box comprises a plurality of L-shaped aluminum plate unit assemblies, horizontal laminated glass, vertical laminated glass and a clamping member. The present invention divides the overall appearance decorative aluminum plate in the external stepped decorative box into a plurality of L-shaped aluminum plate unit assemblies for splicing, and the L-shaped aluminum plate unit assemblies can be processed in a factory and hoisted on site, and the hoisting process is simple, the construction quality is more guaranteed and more environmentally friendly; synchronous construction and installation can be performed, and the installation efficiency is higher.

Description

Technical Field

[0001] The invention relates to the technical field of curtain wall construction, and in particular to a glass curtain wall with an externally mounted stepped decorative box and a construction method thereof. Background Art

[0002] Conventional glass curtain walls with large-sized external decorative components or external sunshade components have external decorative components designed as integral frame structures. The integral frame structures are bulky and inconvenient to transport, and can only be processed and hoisted on site. It is not only difficult to ensure the installation quality, but also the hoisting process is difficult and prone to cause personal injury. In addition, the existing external decorative components are directly fixed on the keel assembly, and the gap between the external decorative components and the glass panel is small. Therefore, the external decorative components can only be installed after the construction of the glass curtain wall is completed. The installation efficiency is low and the installation quality cannot be guaranteed. In particular, the installation difficulty is greater for special-shaped curved surfaces, and the construction quality is more difficult to guarantee. Summary of the invention

[0003] The object of the present invention is to provide a glass curtain wall with an external stepped decorative box and a construction method thereof, which is easy to construct, has a low construction cost and high construction safety, in view of the deficiencies in the prior art.

[0004] The glass curtain wall with external stepped decorative box provided by the present invention comprises a keel assembly fixed on a round tube cross beam in a main steel structure, an external stepped decorative box fixed on the keel assembly and a glass assembly, wherein the keel assembly comprises a steel tube column, a sleeve core sleeved between two adjacent upper and lower steel tube columns, and a steel tube cross beam welded between two adjacent left and right steel tube columns, wherein the steel tube column is fixedly connected to the round tube cross beam through a corbel connector, and the external stepped decorative box comprises a plurality of L-shaped aluminum plate unit assemblies, a transverse Laminated glass, vertical laminated glass and clamping parts, the horizontal section of each L-shaped aluminum plate unit assembly is detachably connected to the steel pipe crossbeam through a crossbeam connector, the vertical section of each L-shaped aluminum plate unit assembly is detachably connected to the steel pipe column through a column connector, adjacent L-shaped aluminum plate unit assemblies are arranged in a stepped manner on the keel assembly, the horizontal laminated glass is horizontally fixed between the left and right adjacent L-shaped aluminum plate unit assemblies through a clamping part, and the vertical laminated glass is vertically fixed between the upper and lower adjacent L-shaped aluminum plate unit assemblies through a clamping part.

[0005] The L-shaped aluminum plate unit assembly includes an L-shaped keel frame welded from a plurality of square tubes, and a perforated aluminum plate fixed to the outside of the L-shaped keel frame by screws; a first L-shaped connector arranged in the same direction as the L-shaped keel frame is provided at the top of the L-shaped keel frame, and a second L-shaped connector arranged in the opposite direction thereof is provided at the bottom corner of the L-shaped keel frame; a vertical section of the second L-shaped connector in the upper L-shaped keel frame is coplanarly arranged with a vertical section of the first L-shaped connector in the lower L-shaped keel frame; a horizontal section of the second L-shaped connector in the left L-shaped keel frame is coplanarly arranged with a horizontal section of the first L-shaped connector in the right L-shaped keel frame; each clamp is fixed to the vertical section and horizontal section of each L-shaped connector by bolts; a rearwardly extended transverse connecting plate is provided at the rear end of the horizontal section of the L-shaped keel frame, and the transverse connecting plate is detachably connected to the crossbeam connecting member by bolts; a rearwardly extended vertical connecting plate is provided at the rear end of the vertical section of the L-shaped keel frame, and the vertical connecting plate is detachably connected to the column connecting member.

[0006] The rear end of the crossbeam connector is welded to the steel pipe crossbeam, and the front end extends out of the glass assembly to present an overhanging shape.

[0007] The column connecting piece includes a vertical fixing plate and a threaded fastener. The rear end of the vertical fixing plate is welded to the steel pipe column, and the front end extends out of the glass assembly in an outward-cantilevered shape. A plug-in slot arranged along the axial direction of the steel pipe column is provided at the front end of the vertical fixing plate. A first long hole arranged axially perpendicular to the steel pipe column and a second long hole arranged axially along the steel pipe column are provided on the vertical fixing plates on both sides of the plug-in slot. The first long hole is arranged above the second long hole. A positioning hole and an upwardly bent L-shaped positioning slot are provided on the rear end surface of the vertical connecting plate. The positioning hole is arranged below the L-shaped positioning slot. The rear end of the vertical connecting plate is inserted into the plug-in slot. The vertical connecting plate is connected to the vertical fixing plate in an adjustable up and down position by a threaded fastener passing through the second long hole and the positioning hole. The vertical connecting plate is connected to the vertical fixing plate in an adjustable front and rear inclination angle by a threaded fastener passing through the first long hole and the L-shaped positioning slot.

[0008] A height adjustment bolt arranged along the axial direction of the steel pipe column is threadedly connected to the vertical connecting plate, and the bottom of the height adjustment bolt is connected to a threaded fastener passing through the first long hole for fine-tuning the upper and lower positions of the L-shaped aluminum plate unit assembly.

[0009] An expansion joint is arranged between two adjacent upper and lower steel pipe columns.

[0010] The expansion joint is filled with sealant.

[0011] The construction method of the glass curtain wall applicable to the above-mentioned external stepped decorative box provided by the present invention comprises the following steps:

[0012] S1. Make the overall building model

[0013] In Rhino software, a preliminary model of the entire building is constructed according to the main building construction plan. The spatial coordinates of the main steel structure in the preliminary model of the entire building are extracted using BIM technology. The constructed main steel structure is tracked and measured using a total station. The spatial coordinates of the main steel structure in the preliminary model of the entire building are corrected based on the measurement results of the total station to produce the final overall model of the building.

[0014] S2. Make curtain wall construction model

[0015] According to the curtain wall construction plan, a preliminary curtain wall construction model is constructed on the overall building model. According to the preliminary curtain wall construction model, measurement and layout are carried out on the constructed main steel structure. According to the layout data, the preliminary curtain wall construction model is adjusted to form the final curtain wall construction model.

[0016] S3. Make keel components, external stepped decorative boxes and glass components

[0017] According to the curtain wall construction model, the processing dimensions of the keel assembly, the external stepped decorative box and the glass assembly are derived, and the steel pipe columns, sleeve cores and steel pipe beams in the keel assembly are manufactured; the L-shaped aluminum plate unit assembly, horizontal laminated glass, vertical laminated glass, clamps, beam connectors and column connectors in the external stepped decorative box are manufactured; and the glass panel in the glass assembly is manufactured; four clamps are fixed in pairs to the horizontal and vertical sections of the L-shaped aluminum plate unit assembly to form an integral body, and the positions and sizes of the four clamps are adjusted to ensure consistency with the curtain wall construction model;

[0018] S4. Make and install the bracket connector

[0019] According to the curtain wall construction model, make the bracket connectors that fix the keel assembly to the round tube beam in the main steel structure, and ensure the processing accuracy of the intersection line between each bracket connector and the round tube beam; weld the manufactured bracket connectors to the corresponding position on the outer surface of the round tube beam;

[0020] S5. Install the keel assembly

[0021] According to the curtain wall construction model, weld the steel pipe column to the outer end section of the corbel connector, fix the sleeve core set between the upper and lower adjacent steel pipe columns, and weld the steel pipe crossbeam to the corresponding positions of the left and right adjacent steel pipe columns, ensuring that the installation position of each steel pipe column and steel pipe crossbeam is consistent with that in the curtain wall construction model, and complete the installation of the keel assembly;

[0022] S6. Install beam connectors and column connectors

[0023] S61. According to the positions of the L-shaped aluminum plate unit components in the curtain wall construction model, the beam connectors are pre-positioned at the corresponding positions of the steel pipe beams in groups of two by spot welding, and the column connectors are pre-positioned at the corresponding positions of the steel pipe columns in groups of two by spot welding;

[0024] S62, reviewing the spatial positions of the pre-welded beam connectors and column connectors by means of 3D scanning to find out the deviations, and finally positioning the beam connectors and column connectors by means of full welding after adjustment;

[0025] S7. Install glass components

[0026] Lifting glass panels and other components in glass assemblies;

[0027] S8. Install L-shaped aluminum plate unit assembly

[0028] Use a crane to hoist the L-shaped aluminum plate unit assembly, pre-connect the L-shaped aluminum plate unit assembly with the beam connector and the column connector through fasteners, adjust the L-shaped aluminum plate unit assembly to the installation position using height adjustment bolts, tighten the fasteners, and complete the positioning and installation of the L-shaped aluminum plate unit assembly;

[0029] S9. Install horizontal laminated glass and vertical laminated glass

[0030] The horizontal laminated glass is fixed to two sets of clamps arranged horizontally in pairs in the two adjacent L-shaped aluminum plate unit assemblies on the left and right through four stainless steel connectors; the vertical laminated glass is fixed to two sets of clamps arranged vertically in pairs in the two adjacent L-shaped aluminum plate unit assemblies on the top and bottom through four stainless steel connectors to complete the installation of the external stepped decorative box.

[0031] To further improve work efficiency and save costs, in steps S7, S8 and S9, when the inclination angle of the steel pipe column in the keel assembly toward the side of the main steel structure is greater than 85° or the inclination angle toward the outside of the building is greater than 75°, a combination of a boom crane and a crane is used to lift the glass panel in the glass assembly, and a combination of a hanging basket and a crane is used to lift other components in the glass assembly, L-shaped aluminum plate unit assembly, horizontal laminated glass and vertical laminated glass.

[0032] In step S62, the specific steps of 3D scanning are as follows:

[0033] S621, paste target paper

[0034] Paste 5 to 10 target papers on the perimeter of the building;

[0035] S622, 3D scanning

[0036] Set up a 3D scanner 5 to 10 meters outside the curtain wall, with a spacing of 5 to 10 meters between each station. The scanning time for each station is about 5 minutes. At least 50% of the overlap area should be ensured between two adjacent stations.

[0037] S623, Point Cloud Processing

[0038] The repeated areas of each station are stitched together to generate a scan file for the project;

[0039] S624, point cloud positioning

[0040] Find the location of the target paper, find at least 3 clear locations, obtain the point cloud coordinates of these three locations, use the total station to measure the project coordinates of the target paper on site, and locate them in our project coordinate system through these 3 coordinates;

[0041] S625, point cloud and model verification

[0042] The located point cloud is further checked with our model, and the corresponding section is cut out at the curtain wall keel position. The difference between the point cloud slice and the keel is compared, and a second check is performed using a total station. If the error exceeds the range, on-site correction is performed;

[0043] S626, Reverse Modeling

[0044] The on-site structure is reverse modeled based on the point cloud, and the curtain wall components that need to be reverse-measured are cut based on the reverse-modeled structure.

[0045] Compared with the prior art, the present invention has the following advantages:

[0046] 1. The overall appearance decorative aluminum plate in the external stepped decorative box is divided into multiple L-shaped aluminum plate unit components and spliced ​​together. The L-shaped aluminum plate unit components can be processed in the factory and hoisted on site. The hoisting process is simple, the construction quality is more guaranteed and more environmentally friendly.

[0047] 2. Install the L-shaped aluminum plate unit assembly on the keel assembly through the beam connector and the column connector, so that the L-shaped aluminum plate unit assembly is arranged in an outward-cantilevered shape as a whole. The laminated glass and adjacent glass components in the external stepped decorative box can be constructed and installed synchronously, which has higher installation efficiency.

[0048] 3. All curtain wall renovation and construction uses BIM model data, which increases construction accuracy.

[0049] 4. Pre-position and install the beam connectors and column connectors first, and then verify the pre-positioned positions through 3D scanning for final positioning, which will increase the construction accuracy.

[0050] The invention has more convenient construction, higher installation accuracy and faster efficiency, and is particularly suitable for use in glass curtain walls with characteristic exterior decorative boxes in large venues. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is a schematic diagram of the partial horizontal plane structure of the glass curtain wall with an external stepped decorative box in the present invention.

[0052] Figure 2 for Figure 1 Schematic diagram of the structure in direction A.

[0053] Figure 3 for Figure 1 Schematic diagram of the structure in the B direction.

[0054] Figure 4 for Figure 1 Enlarged structural diagram at point C in the middle.

[0055] Figure 5 for Figure 2 The cross-sectional view at D in the middle is partially omitted and the enlarged structural diagram is shown.

[0056] Figure 6 for Figure 3 Enlarged structural diagram at E in the middle.

[0057] The marks and corresponding component names shown in the figure are:

[0058] 1. Round tube beam;

[0059] 2. Keel assembly; 21. Steel pipe column; 22. Core sleeve; 23. Steel pipe beam; 24. Expansion joint; 25. Sealant;

[0060] 3. External stepped decorative box; 31. L-shaped aluminum plate unit assembly; 32. Horizontal laminated glass; 33. Vertical laminated glass; 34. Clamping piece; 35. Crossbeam connector; 36. Column connector; 37. Height adjustment bolt; 311. L-shaped keel frame; 312. Perforated aluminum plate; 313. First L-shaped connector; 314. Second L-shaped connector; 315. Horizontal connecting plate; 316. Vertical connecting plate; 3161. Positioning hole; 3162. L-shaped positioning groove; 361. Vertical fixing plate; 362. Threaded fastener; 363. Plug-in slot; 364. First long hole; 365. Second long hole;

[0061] 4. Glass components;

[0062] 5. Corbel connector. DETAILED DESCRIPTION

[0063] from Figures 1 to 6It can be seen that the glass curtain wall with an external stepped decorative box of the present invention comprises a keel assembly 2, an external stepped decorative box 3 and a glass assembly 4. The keel assembly 2 is fixed to the round tube beam 1 in the main steel structure through a corbel connector 5, and the external stepped decorative box 3 and the glass assembly 4 are fixed to the keel assembly 2.

[0064] from Figures 1 to 6 It can be seen that the keel assembly 2 in the present invention includes a steel tube column 21, a sleeve core 22 and a steel tube cross beam 23. The steel tube column 21 is welded and fixed on the round tube cross beam 1 through a corbel connector 5. The sleeve core 22 is sleeved between two adjacent steel tube columns 21 above and below. The steel tube cross beam 23 is welded between two adjacent steel tube columns 21 on the left and right. An expansion joint 24 is provided between the two adjacent steel tube columns 21 above and below, and a sealant 25 is filled in the expansion joint 24 on the outside of the sleeve core 22.

[0065] from Figures 1 to 6 It can be seen that the external stepped decorative box 3 in the present invention includes a plurality of L-shaped aluminum plate unit components 31, a horizontal laminated glass 32, a vertical laminated glass 33, a clamp 34, a beam connector 35 and a column connector 36, wherein:

[0066] The rear end of the crossbeam connector 35 is welded to the steel tube crossbeam 23, and the front end extends out of the glass assembly 4 to form an outward projection;

[0067] The column connector 36 includes a vertical fixing plate 361 and a threaded fastener 362. The rear end of the vertical fixing plate 361 is welded to the steel pipe column 21, and the front end extends out of the glass assembly 4 in an outward shape. A plug-in slot 363 arranged along the axial direction of the steel pipe column 21 is provided at the front end of the vertical fixing plate 361. A first long hole 364 arranged perpendicular to the axial direction of the steel pipe column 21 and a second long hole 365 arranged along the axial direction of the steel pipe column 21 are provided on the vertical fixing plate 361 on both sides of the plug-in slot 363. The first long hole 364 is arranged above the second long hole 365.

[0068] The L-shaped aluminum plate unit assembly 31 includes an L-shaped keel frame 311, a perforated aluminum plate 312, a first L-shaped connector 313, a second L-shaped connector 314, a horizontal connecting plate 315 and a vertical connecting plate 316. The L-shaped keel frame 311 is welded by a plurality of square tubes; the perforated aluminum plate 312 is overheadly covered on the outside of the L-shaped keel frame 311, and the perforated aluminum plate 312 is fixedly connected to the L-shaped keel frame 311 by screws; the first L-shaped connector 313 and the second L-shaped connector 314 are both fixed by a fixing portion and welded to the fixing portion. The fixing part is in a bent shape corresponding to the square tube in the L-shaped keel frame 311. The two connecting parts are respectively welded on different facades of the fixing part and are arranged perpendicular to each other to form horizontal sections or vertical sections of each L-shaped connecting member. The first L-shaped connecting member 313 is arranged in the same direction at the top of the L-shaped keel frame 311. The fixing part of the first L-shaped connecting member 313 is fixedly connected to the square tube at the top of the L-shaped keel frame 311 by screws; the second L-shaped connecting member 314 is arranged in the opposite direction at the bottom of the L-shaped keel frame 311 At the corner, the fixing part of the second L-shaped connecting piece 314 is fixedly connected to the square tube at the bottom corner of the L-shaped keel frame 311 by screws; the horizontal connecting plate 315 is extended backward and welded to the rear end face of the horizontal section of the L-shaped keel frame 311, and the horizontal connecting plate 315 is detachably connected to the cross beam connecting piece 35 by bolts; the vertical connecting plate 316 is extended backward and welded to the rear end face of the vertical section of the L-shaped keel frame 311, and a positioning hole 3161 and an upwardly bent L-shaped positioning hole are provided on the rear end face of the vertical connecting plate 316. The positioning slot 3162, the positioning hole 3161 is arranged below the L-shaped positioning slot 3162, the rear end of the vertical connecting plate 316 is inserted into the plug-in slot 363, the vertical connecting plate 316 is connected to the vertical fixing plate 361 by the threaded fastener 362 passing through the second long hole 365 and the positioning hole 3161, and the vertical connecting plate 316 is connected to the vertical fixing plate 361 by the threaded fastener 362 passing through the first long hole 364 and the L-shaped positioning slot 3162, and the front and rear inclination angle is adjustable;

[0069] Adjacent L-shaped aluminum plate unit components 31 are arranged in a stepped manner on the keel component 2 through the crossbeam connector 35 and the column connector 36, the vertical section of the second L-shaped connector 314 on the upper L-shaped keel frame 311 is coplanar with the vertical section of the first L-shaped connector 313 on the lower L-shaped keel frame 311, and the horizontal section of the second L-shaped connector 314 on the left L-shaped keel frame 311 is coplanar with the horizontal section of the first L-shaped connector 313 on the right L-shaped keel frame 311;

[0070] Each clamping member 34 is fixed to the vertical section and the horizontal section of the first L-shaped connecting member 313 and the second L-shaped connecting member 314 by bolts;

[0071] The transverse laminated glass 32 is horizontally fixed by screws between the clamping pieces 34 arranged face to face on the two adjacent L-shaped aluminum plate unit assemblies 31 on the left and right;

[0072] The vertical laminated glass 33 is vertically fixed by screws between the clamping members 34 arranged face to face on the upper and lower adjacent L-shaped aluminum plate unit assemblies 31 .

[0073] from Figures 1 to 6 It can be seen that the external stepped decorative box 3 in the present invention also includes a height adjustment bolt 37 for fine-tuning the upper and lower positions of the L-shaped aluminum plate unit assembly 31. The height adjustment bolt 37 is axially threadedly connected to the vertical connecting plate 316 along the steel pipe column 21, and the bottom of the height adjustment bolt 37 is connected to the threaded fastener 362 passing through the first long hole 364. The height adjustment bolt 37 rotates to push the L-shaped aluminum plate unit assembly 31 to slightly move up and down on the column connector 36.

[0074] The construction method of the glass curtain wall of the present invention comprises the following steps:

[0075] S1. Make the overall building model

[0076] In Rhino software, a preliminary model of the entire building is constructed according to the main building construction plan. The spatial coordinates of the main steel structure in the preliminary model of the entire building are extracted using BIM technology. The constructed main steel structure is tracked and measured using a total station. The spatial coordinates of the main steel structure in the preliminary model of the entire building are corrected based on the measurement results of the total station to produce the final overall model of the building.

[0077] S2. Make curtain wall construction model

[0078] According to the curtain wall construction plan, a preliminary curtain wall construction model is constructed on the overall building model. According to the preliminary curtain wall construction model, measurement and layout are carried out on the constructed main steel structure. According to the layout data, the preliminary curtain wall construction model is adjusted to form the final curtain wall construction model.

[0079] S3, make keel component 2, external stepped decorative box 3 and glass component 4

[0080] The processing dimensions of the keel assembly 2, the external stepped decorative box 3 and the glass assembly 4 are derived according to the curtain wall construction model, and the steel tube column 21, the sleeve core 22 and the steel tube beam 23 in the keel assembly 2 are manufactured, and the L-shaped aluminum plate unit assembly 31, the horizontal laminated glass 32, the vertical laminated glass 33, the clamping piece 34, the beam connector 35 and the column connector 36 in the external stepped decorative box 3 are manufactured, and the glass panel in the glass assembly 4 is manufactured; four clamping pieces 34 are fixed to the horizontal section and the vertical section of the L-shaped aluminum plate unit assembly 31 in pairs by screws to form an integral body, and the positions and sizes of the four clamping pieces 34 are adjusted to ensure consistency with the curtain wall construction model;

[0081] S4. Make and install the bracket connector 5

[0082] According to the curtain wall construction model, the bracket connector 5 is manufactured to fix the keel assembly 2 on the round tube beam 1 in the main steel structure, and the processing accuracy of the intersection line between each bracket connector 5 and the round tube beam 1 is ensured; the manufactured bracket connector 5 is welded to the corresponding position on the outer side of the round tube beam 1;

[0083] S5. Install keel assembly 2

[0084] According to the curtain wall construction model, the steel pipe column 21 is welded to the outer end section of the corbel connector 5, the sleeve core 22 is set and fixed between the upper and lower adjacent steel pipe columns 21, and the gap between the upper and lower adjacent steel pipe columns 21 is arranged to form an expansion joint 24, and the expansion joint 24 outside the sleeve core 22 is filled with sealant 25, and the steel pipe cross beam 23 is welded to the corresponding position of the left and right adjacent steel pipe columns 21, ensuring that the installation position of each steel pipe column 21 and the steel pipe cross beam 23 is consistent with the curtain wall construction model, and the installation of the keel assembly 2 is completed;

[0085] S6. Install the beam connector 35 and the column connector 36

[0086] S61, according to the position of each L-shaped aluminum plate unit assembly 31 in the curtain wall construction model, the beam connectors 35 are pre-positioned at the corresponding positions of the steel pipe beams 23 in groups of two by spot welding, and the column connectors 36 are pre-positioned at the corresponding positions of the steel pipe columns 21 in groups of two by spot welding;

[0087] S62, reviewing the spatial positions of the pre-welded beam connector 35 and the column connector 36 by means of 3D scanning to find out the deviation, and finally positioning the beam connector 35 and the column connector 36 by means of full welding after adjustment;

[0088] S7, install glass components 4

[0089] Lifting glass panels and other components in glass assemblies;

[0090] S8, install L-shaped aluminum plate unit assembly 31

[0091] The L-shaped aluminum plate unit assembly 31 is hoisted by a crane, and the L-shaped aluminum plate unit assembly 31 is pre-connected with the crossbeam connecting member 35 and the column connecting member 36 by fasteners. The L-shaped aluminum plate unit assembly 31 is adjusted to the installation position by height adjustment bolts 37, and the fasteners are tightened to complete the positioning and installation of the L-shaped aluminum plate unit assembly 31;

[0092] S9, installing horizontal laminated glass 32 and vertical laminated glass 33

[0093] The horizontal laminated glass 32 is fixed to two groups of clamping members 34 arranged horizontally in pairs in the two adjacent L-shaped aluminum plate unit assemblies 31 on the left and right through four stainless steel connectors; the vertical laminated glass 33 is fixed to two groups of clamping members 34 arranged vertically in pairs in the two adjacent L-shaped aluminum plate unit assemblies 31 on the top and bottom through four stainless steel connectors, thereby completing the installation of the external stepped decorative box 3.

[0094] In the above steps S7, S8 and S9, when the inclination angle of the steel pipe column 21 in the keel assembly 2 toward the side of the main steel structure is greater than 85° or the inclination angle toward the outside of the building is greater than 75°, a combination of a boom crane and a crane is used to lift the glass panel in the glass assembly 4, and a combination of a hanging basket and a crane is used to lift other components in the glass assembly 4, the L-shaped aluminum plate unit assembly 31, the horizontal laminated glass 32 and the vertical laminated glass 33.

[0095] In step S62, the specific steps of 3D scanning are as follows:

[0096] S621, paste target paper

[0097] Paste 5 to 10 target papers on the periphery of the building. The target papers should be pasted in a place that is not easy to fall off and has good identification.

[0098] S622, 3D scanning

[0099] Set up a 3D scanner 5 to 10 meters outside the curtain wall, with a spacing of 5 to 10 meters. When scanning, the 3D scanner ground should be flat and stable. Construction should be stopped as much as possible in the scanning area to avoid people walking in and vibrations that affect the scanning accuracy. The scanning time for each station is about 5 minutes, and at least 50% of the overlap area should be guaranteed between adjacent stations.

[0100] S623, Point Cloud Processing

[0101] According to the repeated areas of each station, some invalid point clouds are manually deleted to generate a scan file of the project;

[0102] S624, point cloud positioning

[0103] Find the location of the target paper, find at least 3 clear locations, obtain the point cloud coordinates of these three locations, use the total station to measure the project coordinates of the target paper on site, and locate them in our project coordinate system through these 3 coordinates;

[0104] S625, point cloud and model verification

[0105] Continue to check the located point cloud with our model, cut out the corresponding section at the curtain wall keel position, compare the difference between the point cloud slice and the keel, use the total station for secondary review if the error is large, and correct the error on site if it is indeed out of range;

[0106] S626, Reverse Modeling

[0107] The on-site structure is reverse modeled based on the point cloud, and the curtain wall components that need to be reverse-measured are cut based on the reverse-modeled structure.

Claims

1. A glass curtain wall with an external stepped decorative box, comprising a keel assembly (2) fixed on a circular tube crossbeam (1) in a main steel structure, an external stepped decorative box (3) fixed on the keel assembly, and a glass assembly (4), wherein the keel assembly comprises a steel tube column (21), a sleeve core (22) sleeved between two adjacent upper and lower steel tube columns, and a steel tube crossbeam (23) welded between two adjacent left and right steel tube columns, characterized in that: The steel tube column is fixedly connected to the round tube crossbeam via a corbel connector (5); the external stepped decorative box comprises a plurality of L-shaped aluminum plate unit assemblies (31), transverse laminated glass (32), vertical laminated glass (33) and a clamp (34); the horizontal section of each L-shaped aluminum plate unit assembly is detachably connected to the steel tube crossbeam via a crossbeam connector (35); the vertical section of each L-shaped aluminum plate unit assembly is detachably connected to the steel tube column via a column connector (36); adjacent L-shaped aluminum plate unit assemblies are arranged in a stepped manner on the keel assembly; the transverse laminated glass is horizontally fixed between two adjacent L-shaped aluminum plate unit assemblies on the left and right via a clamp; the vertical laminated glass is vertically fixed via a clamp The L-shaped aluminum plate unit assembly is fixed between two upper and lower adjacent L-shaped aluminum plate unit assemblies; the L-shaped aluminum plate unit assembly includes an L-shaped keel frame (311) welded from a plurality of square tubes, a perforated aluminum plate (312) fixed to the outside of the L-shaped keel frame by screws, a first L-shaped connecting piece (313) arranged in the same direction as the L-shaped keel frame is provided at the top of the L-shaped keel frame, a second L-shaped connecting piece (314) arranged in the opposite direction as the L-shaped keel frame is provided at the bottom corner of the L-shaped keel frame, the vertical section of the second L-shaped connecting piece in the upper L-shaped keel frame is arranged in the same plane as the vertical section of the first L-shaped connecting piece in the lower L-shaped keel frame, and the horizontal section of the second L-shaped connecting piece in the left L-shaped keel frame is arranged in the same plane as the horizontal section of the first L-shaped connecting piece in the right L-shaped keel frame. The L-shaped keel frame is arranged on a plane, and each clamping member is fixed to the vertical section and the horizontal section of each L-shaped connecting member by bolts; a rearwardly extended transverse connecting plate (315) is provided at the rear end of the horizontal section of the L-shaped keel frame, and the transverse connecting plate is detachably connected to the crossbeam connecting member by bolts; a rearwardly extended vertical connecting plate (316) is provided at the rear end of the vertical section of the L-shaped keel frame, and the vertical connecting plate is detachably connected to the column connecting member; the column connecting member comprises a vertical fixing plate (361) and a threaded fastener (362); the rear end of the vertical fixing plate is welded to the steel pipe column, and the front end extends out of the glass assembly in an outwardly cantilevered shape; a plug-in slot (363) arranged along the axial direction of the steel pipe column is provided at the front end of the vertical fixing plate, and the vertical fixing plates on both sides of the plug-in slot are provided with A first elongated hole (364) is arranged axially along the vertical steel pipe column and a second elongated hole (365) is arranged axially along the steel pipe column. The first elongated hole is arranged above the second elongated hole. A positioning hole (3161) and an upwardly curved L-shaped positioning groove (3162) are provided on the rear end surface of the vertical connecting plate. The positioning hole is arranged below the L-shaped positioning groove. The rear end of the vertical connecting plate is inserted into the plug-in groove. The vertical connecting plate is connected to the vertical fixing plate in an adjustable vertical position through a threaded fastener passing through the second elongated hole and the positioning hole. The vertical connecting plate is connected to the vertical fixing plate in an adjustable front and rear inclination angle through a threaded fastener passing through the first elongated hole and the L-shaped positioning groove. An expansion joint (24) is provided between two upper and lower adjacent steel pipe columns.

2. The glass curtain wall with external stepped decorative box according to claim 1 is characterized by: The rear end of the crossbeam connector is welded to the steel pipe crossbeam, and the front end extends out of the glass assembly to present an overhanging shape.

3. The glass curtain wall with external stepped decorative box according to claim 1 is characterized by: A height adjustment bolt (37) arranged along the axial direction of the steel pipe column is threadedly connected to the vertical connection plate, and the bottom of the height adjustment bolt is connected to a threaded fastener passing through the first long hole for fine-tuning the upper and lower positions of the L-shaped aluminum plate unit assembly.

4. The glass curtain wall with external stepped decorative box according to claim 1, characterized in that: The expansion joint is filled with sealant (25).

5. A construction method applicable to the glass curtain wall according to any one of claims 1 to 4, characterized in that: The steps include: S1. Make the overall building model In Rhino software, a preliminary model of the entire building is constructed according to the main building construction plan. The spatial coordinates of the main steel structure in the preliminary model of the entire building are extracted using BIM technology. The constructed main steel structure is tracked and measured using a total station. The spatial coordinates of the main steel structure in the preliminary model of the entire building are corrected based on the measurement results of the total station to produce the final overall model of the building. S2. Make curtain wall construction model According to the curtain wall construction plan, a preliminary curtain wall construction model is constructed on the overall building model. According to the preliminary curtain wall construction model, measurement and layout are carried out on the constructed main steel structure. According to the layout data, the preliminary curtain wall construction model is adjusted to form the final curtain wall construction model. S3. Make the keel assembly (2), the external stepped decorative box (3) and the glass assembly (4) The processing dimensions of the keel assembly (2), the external stepped decorative box (3) and the glass assembly (4) are derived according to the curtain wall construction model, and the steel tube column (21), the sleeve core (22) and the steel tube beam (23) in the keel assembly are manufactured; the L-shaped aluminum plate unit assembly (31), the horizontal laminated glass (32), the vertical laminated glass (33), the clamping piece (34), the beam connecting piece (35) and the column connecting piece (36) in the external stepped decorative box are manufactured; and the glass panel in the glass assembly is manufactured; four clamping pieces (34) are fixed in pairs to the horizontal section and the vertical section of the L-shaped aluminum plate unit assembly (31) to form an integral body, and the positions and sizes of the four clamping pieces are adjusted to ensure consistency with the curtain wall construction model; S4. Make and install the bracket connector (5) According to the curtain wall construction model, a bracket connector (5) is manufactured to fix the keel assembly to the round tube beam (1) in the main steel structure, and the processing accuracy of the intersection line between each bracket connector (5) and the round tube beam (1) is ensured; the manufactured bracket connector is welded to the corresponding position of the outer surface of the round tube beam; S5. Install the keel assembly (2) According to the curtain wall construction model, weld the steel pipe column to the outer end section of the corbel connector, fix the sleeve core set between the upper and lower adjacent steel pipe columns, and weld the steel pipe crossbeam to the corresponding positions of the left and right adjacent steel pipe columns, ensuring that the installation position of each steel pipe column and steel pipe crossbeam is consistent with that in the curtain wall construction model, and complete the installation of the keel assembly; S6. Install the crossbeam connector (35) and column connector (36) S61, according to the position of each L-shaped aluminum plate unit assembly (31) in the curtain wall construction model, the beam connectors (35) are pre-positioned at the corresponding positions of the steel tube beams (23) in groups of two by spot welding, and the column connectors (36) are pre-positioned at the corresponding positions of the steel tube columns (21) in groups of two by spot welding; S62, reviewing the spatial positions of the pre-welded crossbeam connector (35) and column connector (36) by means of 3D scanning to find deviations, and finally positioning the crossbeam connector (35) and column connector (36) by means of full welding after adjustment; S7, Install glass components (4) Lifting glass panels and other components in glass assemblies; S8. Install L-shaped aluminum plate unit assembly (31) Using a crane to hoist the L-shaped aluminum plate unit assembly, pre-connecting the L-shaped aluminum plate unit assembly with the crossbeam connector and the column connector by means of fasteners, adjusting the L-shaped aluminum plate unit assembly to the installation position by means of height adjustment bolts, and tightening the fasteners to complete the positioning and installation of the L-shaped aluminum plate unit assembly (31); S9. Install horizontal laminated glass (32) and vertical laminated glass (33) The horizontal laminated glass (32) is fixed to two groups of clamping members (34) arranged horizontally in pairs in two adjacent left and right L-shaped aluminum plate unit assemblies (31) by four stainless steel connecting members; the vertical laminated glass (33) is fixed to two groups of clamping members (34) arranged vertically in pairs in two adjacent upper and lower L-shaped aluminum plate unit assemblies (31) by four stainless steel connecting members, thereby completing the installation of the external stepped decorative box (3).

6. The construction method of the glass curtain wall according to claim 5, characterized in that: In steps S7, S8 and S9, when the inclination angle of the steel pipe column (21) in the keel assembly (2) toward one side of the main steel structure is greater than 85° or the inclination angle toward the outside of the building is greater than 75°, a combination of a boom crane and a crane is used to hoist the glass panel in the glass assembly (4), and a combination of a hanging basket and a crane is used to hoist other components in the glass assembly (4), the L-shaped aluminum plate unit assembly (31), the horizontal laminated glass (32) and the vertical laminated glass (33).

7. The construction method of the glass curtain wall according to claim 5, characterized in that: In step S62, the specific steps of 3D scanning are as follows: S621, paste target paper Paste 5 to 10 target papers on the perimeter of the building; S622, 3D scanning Set up a 3D scanner 5 to 10 meters outside the curtain wall, with a spacing of 5 to 10 meters between each station. The scanning time for each station is about 5 minutes. At least 50% of the overlap area should be ensured between two adjacent stations. S623, Point Cloud Processing The repeated areas of each station are stitched together to generate a scan file for the project; S624, point cloud positioning Find the location of the target paper, find at least 3 clear locations, obtain the point cloud coordinates of these three locations, use the total station to measure the project coordinates of the target paper on site, and locate them in our project coordinate system through these 3 coordinates; S625, point cloud and model verification The located point cloud is further checked with our model, and the corresponding section is cut out at the curtain wall keel position. The difference between the point cloud slice and the keel is compared, and a second check is performed using a total station. If the error exceeds the range, on-site correction is performed; S626, Reverse Modeling The on-site structure is reverse modeled based on the point cloud, and the curtain wall components that need to be reverse-measured are cut based on the reverse-modeled structure.

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