A construction method for a hollow matrix steel structure combined porch

Abstract

The invention discloses a construction method of a hollow matrix steel structure combined porch, the construction method includes construction of enlarged foot independent foundation, construction of steel structure component assembly (beam column), construction of construction platform, construction of hollow matrix flower stand, construction of double-layer "four-leaf clover" edge wrapping, construction of ETFE light-transmitting film, installation of lighting equipment, construction of dust-repellent and hydrophobic glass, edge wrapping and fixing of steel structure skeleton, construction of cantilevered landscape platform, and complete removal of construction platform. The construction method of the invention adopts a porch formed by the combination construction of steel structure + hollow matrix flower stand, so that the porch design structure is generous and solemn, with a very beautiful artistic sense, can not only be used as a passage of a building, but also has a landscape effect, and several double-layer four-leaf clover structures are laid in a hollow matrix on the main steel beam of the steel structure skeleton, the upper and lower parts of the secondary steel beam, and the construction of matching hollow matrix flower stand, so that the on-site process of the construction site is rationalized and the construction speed is improved.

Description

Technical Field

[0001] The invention relates to the technical field of porch construction, and in particular to a construction method of a hollow matrix steel structure combined porch. Background Art

[0002] The porch is the transitional space between the outdoors and the indoors. It is a protruding passage in front of the building with a roof, a balcony, and a canopy. At present, the porches of buildings are generally simple door frame shapes with a simple overall appearance, so they are often called simplified porch structures. For example, the entrances of residential buildings, hospitals, creative parks, office parks, industrial parks, etc. use large-span porches, which become visual highlights and site benchmarks.

[0003] There are two main construction schemes for existing porch structures. One is to cast the porch completely with concrete, and the other is to use prefabricated steel beams and steel columns, and connect the steel beam and steel column nodes into a whole through the reinforced concrete post-casting part to form a frame porch structure system. The construction scheme of the porch structure has the following shortcomings:

[0004] 1) Although the concrete porch structure is anti-insect and anti-corrosion, and improves the safety of the structure, it has the problems of heavy components, long on-site pouring period, and greater environmental pollution during construction and demolition;

[0005] 2) Steel beams and steel columns are used, and the steel beam and steel column nodes are connected into a whole through the reinforced concrete post-casting part to form a frame structure system. Compared with the concrete pouring construction method, although the construction efficiency is improved, the overall weight of the porch is large. The steel beams and steel columns required for the porch are large in size after being processed in the factory, and it is difficult to transport them to the site and hoist them. The construction and installation are more troublesome, which increases the difficulty of on-site work at the construction site and takes a long construction period;

[0006] 3) The existing porch structure has a simple overall appearance and lacks artistic beauty. Summary of the invention

[0007] In view of the problems existing in the above-mentioned prior art, the present invention provides a porch constructed by combining a steel structure with a hollow matrix flower stand, so that the design structure of the porch is generous and solemn, with a very beautiful artistic sense. It can not only be used as a passage of the building, but also has a landscape effect. A number of double-layer four-leaf clover structures are laid in a hollow matrix on the main steel beams and the upper part of the secondary steel beams of the steel structure skeleton, which facilitates the construction of the hollow matrix flower stand, can reduce the difficulty of on-site work at the construction site, increase the construction speed, quickly assemble and construct on-site, and reduce the construction cost.

[0008] In order to achieve the above object, the technical solution adopted by the present invention is:

[0009] A construction method for a hollow matrix steel structure combined porch, the construction method comprising the following construction process:

[0010] Step 1) Construction of enlarged foot independent foundation: The enlarged foot independent foundation of the steel structure column is divided into 2 rows, the first row stands on the foundation pit support crown beam, and the second row stands on the basement top plate;

[0011] Step 2) Steel structure component assembly (beam-column) construction: a number of main steel beams and a number of secondary steel beams form a frame, a number of main steel beams are spaced apart from each other, a number of secondary steel beams are spaced apart from each other, a number of main steel beams and a number of secondary steel beams are staggeredly connected with high-strength bolts and supported by steel columns to form a steel structure skeleton;

[0012] Step 3) Construction platform construction: lay a fine stone concrete cushion layer on the ground, set up a Mantanghong scaffolding and unloading platform on the fine stone concrete cushion layer, and use the Mantanghong scaffolding and unloading platform to install several double-layer "four-leaf clover" structure petals and the outer aluminum veneer of the entire structure;

[0013] Step 4) Construction of hollow matrix flower rack: A plurality of double-layer four-leaf clover structures are laid on the main steel beams and secondary steel beams of the steel structure skeleton. The plurality of double-layer four-leaf clover structures are laid on the main steel beams and secondary steel beams of the steel structure skeleton in a hollow matrix to form a hollow matrix flower rack. Each double-layer four-leaf clover structure includes four sets of petal fixing frames. Each set of petal fixing frames includes an upper fixing frame, a lower fixing frame, and a plurality of secondary keels. The plurality of secondary keels are spaced apart and distributed between the upper fixing frame and the lower fixing frame. The frame is fixed on the top of the lower fixed frame through several secondary keels. The upper and lower parts of the upper fixed frame and the lower fixed frame form a hollow petal structure. Two double-layer stiffening ribs are fixed inside each set of petal fixing frames. The two double-layer stiffening ribs are parallel to each other. The upper fixed frame and the lower fixed frame of each set of petal fixing frames are welded by a combination of several hot-dip galvanized steel pipes. Several hot-dip galvanized steel pipes are hoisted to the unloading platform by a car crane and distributed to the installation area of ​​each double-layer four-leaf clover structure for welding;

[0014] Step 5) Double-layer "four-leaf clover" edge wrapping construction: After the four sets of petal fixing frames of several double-layer four-leaf clover structures are completed, the outside of each set of petal fixing frames of each double-layer four-leaf clover structure is wrapped with a second aluminum single plate;

[0015] Step 6) ETFE light-transmitting film construction: After the ETFE light-transmitting film is rolled up, it is hoisted around the aluminum square tube of the outer lining of the steel structure, unfolded and laid on the lower surface of the aluminum square tube, the film boundary aluminum strip is installed and the film edge is covered, and the film is stretched to an appropriate length by a tensioning device, and finally the tensioning device is removed, and the film boundary aluminum strip is fixed to the edge of the double-layer four-leaf clover structure to complete the installation of the ETFE light-transmitting film on the large-span steel structure;

[0016] Step 7) Lighting equipment installation: LED lights are placed at the bottom and ends of the hollow matrix flower stand;

[0017] Step 8) Construction of dust-repellent and hydrophobic glass: Dust-repellent and hydrophobic glass is installed on the double-layer "four-leaf clover" structure in the middle of the hollow matrix flower stand, and a dust-repellent spray structure arranged in a matrix is ​​installed above the dust-repellent and hydrophobic glass;

[0018] Step 9) Edge fixing of the steel structure skeleton: The steel column of the steel structure skeleton is edged with the first aluminum single plate, and a bracket and a connecting piece are provided between the inner side of the first aluminum single plate and the steel column, and the first aluminum single plate passes through the bracket through the connecting piece and is locked to achieve the fixation of the steel column and the first aluminum single plate;

[0019] Step 10) Construction of cantilevered landscape platform: cantilevered landscape platforms are arranged on the second and third floors of the steel structure skeleton. The cantilevered landscape platforms are welded by steel beams. The support platform of the cantilevered landscape platform is composed of several groups of aluminum alloy grilles. The several groups of aluminum alloy grilles are arranged in parallel to each other to form the support platform of the cantilevered landscape platform. The steel beams of the cantilevered landscape platform are edged by the third aluminum single plate.

[0020] Step 11) All construction platforms are dismantled.

[0021] Furthermore, in the above step 1), the center point of the enlarged foot independent foundation of the steel structure skeleton coincides with the center point of a plurality of double-layer "four-leaf clover" structures, so that the force transmission of the plurality of double-layer four-leaf clover structures is uniform.

[0022] Furthermore, in the above step 1), the steel columns include a first row of supporting steel columns and a second row of supporting steel columns, the first row of supporting steel columns includes a plurality of first supporting steel columns, two of which have independent foundations supported on the top plate of the basement driveway auxiliary structure, the enlarged foot independent foundation includes a first independent foundation and a second independent foundation, the first row of supporting steel columns is supported on the first independent foundation and connected thereto, the first row of supporting steel columns includes a plurality of first supporting steel columns, a column base plate, and a column base anchor bolt, the column base anchor bolt is fixed to the bottom end of the first supporting steel column, the column base plate is annular, and the column base plate is provided with a circumferential A plurality of anchor holes for installing column foot anchor bolts, the column base plate is inserted into the anchor holes through the column foot anchor bolts so as to be paved on the upper end of the first independent foundation, the first independent foundation comprises a first foundation concrete and a first steel cage, the first steel cage is tied inside the first foundation concrete, a shear key is arranged at the bottom of the first supporting steel column, the first supporting steel column is sleeved on the first steel cage through the shear key at the bottom; the second row of supporting steel columns is supported on the second independent foundation, the second independent foundation is located on the foundation pit support crown beam of the structure, and a 300mm thick cushion layer is arranged between the bottom of the second independent foundation and the top of the foundation pit support crown beam.

[0023] Furthermore, in the above step 2), a deformation joint is provided between the steel structure skeleton and the main structure louver frame, and a stainless steel plate drainage ditch is provided on the upper part of the deformation joint.

[0024] Furthermore, in the above step 4), an intermediate fixing beam and a double-layer keel are installed at two parallel positions in the middle of each set of petal fixing frames, and the intermediate fixing beam is fixed to the main steel beam of the steel structure frame through the double-layer keel to form a hyperstatic structure with redundant constraints.

[0025] Furthermore, in the above step 4), tempered laminated glass is also installed on the upper end of the upper fixed frame of each double-layer four-leaf clover structure, and an aluminum alloy single pressure plate, an aluminum alloy sub-frame, an anti-corrosion gasket, an expansion bolt, a fixing bracket, and a fixing are provided between the second aluminum single plate and the tempered laminated glass. One end of the fixing bracket is installed on the second aluminum single plate through the fixing bracket, the aluminum alloy sub-frame is located below the tempered laminated glass, the outer side of the upper end of the aluminum alloy sub-frame is connected to the tempered laminated glass through a sealant, the lower end of the aluminum alloy sub-frame is abutted through one end of the aluminum alloy single pressure plate, the anti-corrosion gasket is located below the aluminum alloy single pressure plate, and the expansion bolt passes through the other end of the aluminum alloy single pressure plate, the other end of the fixing bracket, and the anti-corrosion gasket from top to bottom and is fixed to the upper end of the upper fixed frame.

[0026] Furthermore, in the above step 6), the installation and construction process of the ETFE light-transmitting film includes:

[0027] Step 61) ETFE light-transmitting film hoisting: pack the ETFE light-transmitting film into rolls, and then hoist it around the aluminum square tubes lined with the large-span matrix steel structure;

[0028] Step 62) ETFE light-transmitting film laying: unwinding the ETFE light-transmitting film packaged in a roll, so that the ETFE light-transmitting film gradually changes from a winding state to a spreading state, and is laid on the lower surface of the outer lining aluminum square tube at the lower part of the double-layer four-leaf clover structure;

[0029] Step 63) Installation before tensioning: install the membrane boundary aluminum strip on the outside of the aluminum square tube lining the steel structure, so that the membrane edge of the ETFE light-transmitting film is covered inside the membrane boundary aluminum strip;

[0030] Step 64) ETFE light-transmitting film tensioning: multiple tensioning devices are installed on the large-span matrix steel structure, and the tensioning devices are connected to the aluminum strips at the membrane boundaries, and then tension is applied simultaneously in a direction away from the ETFE light-transmitting film through the tensioning devices on four sides of the ETFE light-transmitting film, thereby stretching the ETFE light-transmitting film;

[0031] Step 65) Fix after tensioning: After the ETFE light-transmitting film boundary aluminum strips are tensioned into place, the tensioning device is removed from the aluminum square tube lining the steel structure, and then the membrane boundary aluminum strips are installed on the outermost edge of each double-layer four-leaf clover structure, so that the tensioned ETFE light-transmitting film can be fixed on the large-span matrix steel structure.

[0032] Furthermore, in the above steps 6 and 7), the hollow petal structure and the side of the upper part of the four groups of petal fixing frames of each double-layer four-leaf clover structure are wrapped by a second aluminum single plate, a light strip is installed in the middle of each double-layer four-leaf clover structure, an ETFE light-transmitting film is installed at the bottom of each double-layer four-leaf clover structure, and the four groups of petal fixing frames of each double-layer four-leaf clover structure are provided with an open detection port in the middle where the ETFE light-transmitting film converges, and four groups of rotating bearings are installed on the outside of each double-layer four-leaf clover structure, and each group of rotating bearings is located outside the ETFE light-transmitting film.

[0033] Furthermore, in the above step 8), a solar photovoltaic panel is embedded between the dust-repellent and hydrophobic glass and the curtain wall of the building facade, the solar photovoltaic panel is supported and fixed by a photovoltaic fixed bracket, and a clean water guide groove is installed around the dust-repellent and hydrophobic glass.

[0034] Furthermore, in the above step 10), several groups of aluminum square tube grilles are respectively installed on both sides of the double-layer stiffening ribs, a U-shaped groove is provided between the double-layer stiffening ribs and each group of aluminum square tube grilles, fixing screws and gaskets are provided on both sides of the U-shaped groove, the gaskets are located between the double-layer stiffening ribs and each group of aluminum square tube grilles, and the fixing screws pass through the aluminum square tube grilles and anti-corrosion gaskets and are fixed to the double-layer stiffening ribs.

[0035] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0036] 1) The construction method of the present invention includes construction of independent foundation of enlarged feet, assembly of steel structure components (beams and columns), construction of construction platform, construction of hollow matrix flower stand, construction of double-layer "four-leaf clover" edging, construction of ETFE light-transmitting film, installation of lighting equipment, construction of dust-repellent and hydrophobic glass, edging fixation of steel structure skeleton, construction of cantilevered landscape platform, and complete dismantling of construction platform. The construction method of the present invention adopts a porch formed by the combination of steel structure + hollow matrix flower stand, so that the porch design structure is generous and solemn, with a very beautiful artistic sense, which can not only be used as a passage of the building, but also has a landscape effect, and a number of double-layer four-leaf clover structures are laid in a hollow matrix on the main steel beam of the steel structure skeleton, the upper and lower parts of the secondary steel beam, and the construction of the matching hollow matrix flower stand is rationalized to improve the construction site process and the construction speed.

[0037] 2) The present invention sets a row of temporary structures and a row of permanent structures under the enlarged foot independent foundation of the steel structure frame. The temporary structure is the foundation pit support crown beam of the basement project, and the row of permanent structures is on the basement top plate, so as to achieve a combination of permanent and temporary. The independent foundation support of the steel structure frame has various forms, including the foundation pit support crown beam of the building, the basement top plate and the basement driveway auxiliary structure.

[0038] 3) The present invention embeds solar photovoltaic panels between the glass and the curtain wall. The photovoltaic panels can not only provide aesthetics for the building, but also achieve efficient conversion of light energy into electrical energy and sustainable development of building energy by cleverly integrating the solar photovoltaic panels into the glass curtain wall of the building. Because the steel structure is affected by wind and sun for a long time, dust-repellent and hydrophobic glass and cleaning spray devices are added to help the self-cleaning effect of the glass.

[0039] 4) The present invention places LED lights at the bottom and ends of the hollow matrix flower stand, and installs LED lights at the ends of the hollow matrix flower stand, which can play a role of floodlighting, so that the completed porch not only has a decorative effect, but also has a lighting function, which is convenient for night lighting and improves the safety of pedestrians walking at night.

[0040] 5) The present invention arranges rotating bearings on the outside of the four petals, and the ETFE light-transmitting film is also located at the bottom of the four petals. The rotating bearings are located on the outside of the ETFE light-transmitting film. The four petals are all reserved with open detection ports in the middle where the ETFE light-transmitting film converges. The petals are arranged with rotating bearings in an outwardly open form, which is convenient for inspection, and can realize local damage and local repair, and realize local open operation, without completely disassembling the outer aluminum plate and the ETFE light-transmitting film, thereby solving the problem of time-consuming and labor-intensive disassembly.

[0041] 6) In the present invention, cantilevered landscape platforms are arranged on the second and third floors below the steel structure skeleton. The cantilevered landscape platforms are welded with steel beams. Several groups of aluminum alloy grilles are arranged on the cantilevered landscape platforms. The steel beams of the cantilevered landscape platforms are edged with third aluminum veneer. The cantilevered landscape platforms are arranged on the second and third floors to create a staggered appearance for the entire combined porch. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a flow chart of the construction of the hollow matrix steel structure combined porch of the present invention;

[0043] Figure 2 It is a structural schematic diagram of the hollow matrix steel structure combined porch of the present invention;

[0044] Figure 3 It is a structural schematic diagram of another angle of the hollow matrix steel structure combined porch of the present invention;

[0045] Figure 4It is a partial plan view of the second-floor cantilevered landscape platform in the steel structure skeleton of the present invention;

[0046] Figure 5 It is a plan layout diagram of the second floor in the steel structure skeleton of the present invention;

[0047] Figure 6 It is a plan layout diagram of the enlarged foot independent foundation in the steel structure skeleton of the present invention;

[0048] Figure 7 It is a partial large-scale drawing of the three-layer cantilevered landscape platform of the steel structure skeleton of the present invention;

[0049] Figure 8 It is a plan layout diagram of three layers in the steel structure skeleton of the present invention;

[0050] Fig. 9 It is a partial large-scale drawing of the hollow matrix flower stand in the steel structure skeleton of the present invention;

[0051] Fig.10 For the present invention Fig. 9 A magnified schematic diagram of the details of the middle part A;

[0052] Fig.11 It is a schematic diagram of one of the double-layer four-leaf clover structures of the present invention being laid on the main and secondary steel beams;

[0053] Fig.12 For the present invention Figure 4 The large sample diagram of reference node 1;

[0054] Fig.13 For the present invention Figure 7 The large sample diagram of reference node 2;

[0055] Fig.14 For the present invention Fig.13 Node diagram of HJJD-01;

[0056] Fig.15 For the present invention Fig.14 Partial detail diagram;

[0057] Fig.16 For the present invention Fig. 9 The large sample diagram of reference node 3;

[0058] Fig.17 For the present invention Fig.16 A magnified view of the details of the middle B section;

[0059] Fig.18 For the present invention Fig.16 Enlarged view of the details of the middle C section;

[0060] Fig.19 For the present invention Fig. 9 The detailed drawing of the wall at reference node 4;

[0061] Fig. 20 For the present invention Fig.19 Enlarged view of the details of the middle D section;

[0062] Fig.21 It is a node diagram of the steel column hemming fixation in the steel structure skeleton of the present invention;

[0063] Fig. 22 For the present invention Fig.21 Enlarged detail of middle E part;

[0064] Fig.23 A large-scale drawing showing the connection of the independent foundation of the enlarged foot in the steel structure skeleton of the present invention;

[0065] Fig.24 A large-scale drawing of the connection between the first row of supporting steel columns and the first independent foundation in the steel structure skeleton of the present invention;

[0066] Fig.25 A large-scale drawing of the connection between the first row of supporting steel columns and the top plate of the auxiliary structure of the basement driveway of the present invention;

[0067] Fig.26 This is a schematic diagram of a structure in which a rotating bearing is arranged outside the double-layer four-leaf clover structure of the present invention;

[0068] Fig. 27 A schematic diagram of a light strip installed in the middle of a double-layer four-leaf clover structure of the present invention;

[0069] Fig.28 It is a relationship diagram of the double-layer four-leaf clover structure and the ETFE light-transmitting film of the present invention;

[0070] Fig.29 For the present invention Fig.28 Side view of the middle opening inspection port;

[0071] Fig.30 A schematic diagram of the relationship between the dust-repellent and hydrophobic glass and the solar photovoltaic panel of the present invention;

[0072] Fig.31 It is a schematic diagram of the relationship between the solar photovoltaic panel and the photovoltaic fixing bracket of the present invention.

[0073] In the figure, steel structure skeleton 1, steel column 11, first row of supporting steel columns 111, first supporting steel column 1111, column base plate 1112, column foot anchor bolt 1113, shear key 1114, enlarged foot independent foundation 12, first independent foundation 121, first foundation concrete 1211, first steel cage 1212, bracket 13, connector 14, first aluminum veneer 15, main steel beam 16, secondary steel beam 17, basement driveway auxiliary structure 18, cantilevered landscape platform 2, aluminum alloy grille 21, third aluminum veneer 22, hollow matrix flower stand 3, double-layer four-leaf clover structure 31, petal fixing frame 311, upper fixed frame 3111, lower fixed frame 3112, secondary keel 3113, double-layer Stiffening ribs 3114, middle fixed beam 312, double-layer keel 313, aluminum square grille 314, U-shaped groove 315, fixing screws 316, gasket 317, rotating bearing 318, open detection port 319, light strip 3120, second aluminum single panel 32, ETFE light-transmitting film 34, LED lamp 35, tempered laminated glass 36, aluminum alloy single pressure plate 37, aluminum alloy sub-frame 38, anti-corrosion gasket 39, expansion bolt 310, fixing bracket 3101, fixing part 3102, main structure louver frame 4, deformation joint 41, stainless steel plate drainage ditch 42, dust-repellent and hydrophobic glass 5, clean water guide trough 51, solar photovoltaic panel 6, photovoltaic fixing bracket 61, dust reduction spray structure 7. DETAILED DESCRIPTION

[0074] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0075] like Figure 1-Figure 20 As shown, a construction method of a hollow matrix steel structure combined porch in an embodiment of the present invention includes the following construction process:

[0076] Step 1) Step 1) Construction of enlarged foot independent foundation: The enlarged foot independent foundation of the steel structure column is divided into 2 rows, the first row stands on the foundation pit support crown beam, and the second row stands on the basement top plate;

[0077] Step 2) Assembly of steel structure components (beams and columns): a plurality of main steel beams 16 and a plurality of secondary steel beams 17 form a frame, a plurality of main steel beams 16 are spaced apart from each other, a plurality of secondary steel beams 17 are spaced apart from each other, a plurality of main steel beams 16 and a plurality of secondary steel beams 17 are staggeredly connected with high-strength bolts and supported by steel columns 11 to form a steel structure skeleton 1; in specific implementation, the length of the steel structure skeleton 1 constructed by the present invention is 160.4m, the width is 18m, the maximum axis span is 16.8m, the top elevation of the steel structure skeleton 1 is 14.8m (partial steel beam 14.95m), the maximum top elevation of the steel column 11 installation is +14.8m, and the single steel column 11 is 15.7m long and weighs 4.55t;

[0078] Step 2) Construction of cantilevered landscape platform 2: cantilevered landscape platform 2 is arranged on the second and third floors below the steel structure skeleton 1, the cantilevered landscape platform 2 is welded by steel beams, a plurality of groups of aluminum alloy grilles 21 are arranged on the upper and lower parts of the cantilevered landscape platform 2, the plurality of groups of aluminum alloy grilles 21 are spaced apart from each other, the steel beams of the cantilevered landscape platform 2 are edged by the third aluminum veneer 22, the cantilevered landscape platform 2 is arranged on the second and third floors below the steel structure skeleton 1, the whole steel structure skeleton 1 can be made to be well-arranged, and the third aluminum veneer 22 is a 3.0 mm thick white fluorocarbon sprayed aluminum veneer;

[0079] Step 3) Construction platform construction: laying a fine stone concrete cushion layer on the ground, setting up a full house scaffolding and an unloading platform on the fine stone concrete cushion layer, and using the full house scaffolding and the unloading platform to install a number of petals 313 of the double-layer four-leaf clover structure 31 and the outer aluminum veneer of the entire structure. In the specific implementation, there are 36 double-layer four-leaf clover structures 31 installed;

[0080] Step 4) Construction of hollow matrix flower rack 3: A plurality of double-layer four-leaf clover structures 31 are laid on the main steel beams 16 and the secondary steel beams 17 of the steel structure skeleton 1. The plurality of double-layer four-leaf clover structures 31 are laid on the main steel beams 16 and the secondary steel beams 17 of the steel structure skeleton 1 in a hollow matrix manner to form a hollow matrix flower rack 3. Each double-layer four-leaf clover structure 31 includes four groups of petal fixing frames 311. Each group of petal fixing frames 311 includes an upper fixing frame 3111, a lower fixing frame 3112, and a plurality of secondary keels 3113. The plurality of secondary keels 3113 are distributed between the upper fixing frame 3111 and the lower fixing frame 3112 at intervals. The upper fixing frame 3111 is fixed to the top of the lower fixing frame 3112 by means of the plurality of secondary keels 3113. The upper and lower parts of the upper fixing frame 3111 and the lower fixing frame 3112 are formed with hollow petal structures. Two double-layer stiffening ribs 3114 are fixed inside each set of petal fixing frames 311, and the two double-layer stiffening ribs 3114 are distributed parallel to each other. The upper fixing frame 3111 and the lower fixing frame 3112 of each set of petal fixing frames are welded together by a plurality of hot-dip galvanized steel pipes, and the plurality of hot-dip galvanized steel pipes are hoisted to the unloading platform by a car crane and distributed to the bare installation area of ​​each double-layer four-leaf clover structure 31 for welding. In specific implementation, the upper fixing frame 3111 and the lower fixing frame 3112 are welded together by 8 hot-dip galvanized steel pipes, and the upper fixing frame 3111 and the lower fixing frame 3112 are divided into 8 hot-dip galvanized steel pipes, and then assembled and welded, so as to facilitate the transportation of the four sets of petal fixing frames 311 of each double-layer four-leaf clover structure 31, and avoid the inconvenience of transportation of the petal fixing frames 311 on each double-layer four-leaf clover structure 31 due to the oversized size;

[0081] Step 5) Double-layer four-leaf clover edge wrapping construction: After the four groups of petal fixing frames 311 of several double-layer four-leaf clover structures 31 are completed, the upper part and the side of each group of petal fixing frames 311 are wrapped with a second aluminum single plate 32, and the second aluminum single plate 32 is a 3mm thick white fluorocarbon coating aluminum single plate. The second aluminum single plate 32 provided in the present invention is mainly used to provide structural support, reinforcement and decorative effect for each double-layer four-leaf clover structure 31;

[0082] Step 6) Construction of ETFE light-transmitting film 34: After the ETFE light-transmitting film 34 is rolled up, it is hoisted around the aluminum square tube lining the steel structure, unfolded and laid on the lower surface of the aluminum square tube, the film boundary aluminum strip is installed and the film edge is covered, and the ETFE light-transmitting film 34 is stretched to an appropriate length by a tensioning device, and finally the tensioning device is removed, and the film boundary aluminum strip is fixed to the edge of the double-layer four-leaf clover structure 31, and the installation of the ETFE light-transmitting film 34 on the hollow matrix flower stand is completed;

[0083] Step 7) Installation of lighting equipment: LED lamps 35 are placed at the bottom and ends of the hollow matrix flower rack 3. The LED lamps 35 are installed at the ends of the hollow matrix flower rack 3 to achieve floodlighting, so that the completed porch not only has a decorative effect, but also has a lighting function, which is convenient for nighttime lighting and improves the safety of pedestrians at night;

[0084] Step 8) Construction of dust-repellent and hydrophobic glass 5: A dust-repellent and hydrophobic glass 5 is also installed on the double-layer four-leaf clover structure 31 in the middle of the hollow matrix flower stand 3, and a dust-reducing spray structure arranged in a matrix is ​​installed above the dust-repellent and hydrophobic glass 5.

[0085] Step 9) The steel structure skeleton 1 is hemmed and fixed: The steel column 11 of the steel structure skeleton 1 is hemmed with the first aluminum single plate 15, and a bracket 13 and a connecting piece 14 are arranged between the inner side of the first aluminum single plate 15 and the steel column 11. The first aluminum single plate 15 passes through the bracket 13 through the connecting piece 14 and is locked to achieve the fixation of the steel column 11 and the first aluminum single plate 15. The first aluminum single plate 15 is a 3mm thick white fluorocarbon coated aluminum single plate; the bracket 13 is a hot-dip galvanized angle steel, and the connecting piece 14 is an expansion bolt 310;

[0086] Step 10) Construction of cantilevered landscape platform 2: cantilevered landscape platform 2 is arranged on the second and third floors below the steel structure skeleton 1, the cantilevered landscape platform 2 is welded by steel beams, a plurality of groups of aluminum alloy grilles 21 are arranged on the upper and lower parts of the cantilevered landscape platform 2, the plurality of groups of aluminum alloy grilles 21 are spaced apart from each other, the steel beam of the cantilevered landscape platform 2 is edged by the third aluminum veneer 22, the cantilevered landscape platform 2 is arranged on the second and third floors below the steel structure skeleton 1, the whole steel structure skeleton 1 can be made to be well-arranged, and the third aluminum veneer 22 is a 3.0 mm thick white fluorocarbon sprayed aluminum veneer;

[0087] Step 11) All construction platforms are dismantled.

[0088] In other embodiments, the dust suppression spray structure of the present invention is controlled by a weak current control system and can be adjusted according to the season, self-cleaning once every 5 days in summer and once every 10 days in winter.

[0089] The present invention is provided with a cantilevered landscape platform 2 on the second and third floors below the steel structure frame 1, which can create a staggered arrangement of the entire steel structure frame 1, and lay a plurality of double-layer four-leaf clover structures 31 in a hollow matrix on the main steel beam 16 and the secondary steel beam 17 of the steel structure frame 1 to form a hollow matrix flower rack 3, each set of petal fixing frames 311 is welded by a plurality of hot-dip galvanized steel pipes, and the plurality of hot-dip galvanized steel pipes are hoisted to the unloading platform by a car crane and distributed to the bare installation of each double-layer four-leaf clover structure 31 The welding is carried out in the area, and several pieces of hot-dip galvanized steel pipes are hoisted to the unloading platform by a car crane and distributed to the bare installation area of ​​each double-layer four-leaf clover structure 31 for welding, which is convenient for the transportation of each group of petal fixing frames 311 and avoids the inconvenience of transportation of each group of petal fixing frames 311 due to the oversized size; the construction method provided by the present invention is very suitable for the construction and installation of flower racks with large scale and oversized petal fixing frames 311, and can also reduce the construction difficulty and hoisting difficulty on site, improve construction efficiency, and shorten the construction period. In addition, the porch of the present invention adopts a steel structure + hollow matrix flower rack 3 combined design structure, which improves the aesthetics of the porch. The entire hollow matrix flower rack 3 is hollow, and dust-repellent and hydrophobic glass 5 is provided to facilitate the main entrance and exit to shelter from rain and shading, and the dust-reducing spray structure can achieve the purpose of self-cleaning.

[0090] In specific implementation, during the construction of the present invention, the center point of the enlarged foot independent foundation 12 of the steel structure skeleton 1 is exactly matched with the center point of the multiple double-layer four-leaf clover structures 31, so that the multiple double-layer four-leaf clover structures 31 transmit force evenly.

[0091] like Figure 22-Figure 23As shown, the enlarged foot independent foundation 12 in step 1) of the present invention is a hybrid foundation, and there are 26 enlarged foot independent foundations 12 in a row, and the steel columns 11 include a first row of supporting steel columns 111 and a second row of supporting steel columns. The enlarged foot independent foundations 12 of two steel columns 11 in the first row of supporting steel columns 111 are supported on the top plate 18 of the basement driveway auxiliary structure, and the enlarged foot independent foundation 12 includes a first independent foundation 121 and a second independent foundation 122. The first row of supporting steel columns 111 is supported on and connected to the first independent foundation 121. The first row of supporting steel columns 111 includes a plurality of first supporting steel columns 1111, a column base plate 1112, and a column base anchor bolt 1113. The column base anchor bolt 1113 is fixed to the bottom end of the first supporting steel column 1111. The column base plate 1112 is annular, and the column base plate 1112 is circumferentially provided with a plurality of anchor bolt holes for installing the column base anchor bolts 1113. The plate 1112 is inserted into the anchor hole through the column foot anchor 1113 so as to be paved on the upper end of the first independent foundation 121. The first independent foundation 121 includes a first foundation concrete 1211 and a first steel cage 1212. The first steel cage 1212 is tied inside the first foundation concrete 1211. A shear key 1114 is arranged at the bottom of the first supporting steel column 1111. The first supporting steel column 1111 is sleeved on the first steel cage 1212 through the shear key 1114 at the bottom; the second row of supporting steel columns is supported on the foundation pit supporting crown beam, and the second independent foundation 122 is located on the foundation pit supporting crown beam of the structure. The structure is a basement. A 300 thick cushion layer is arranged between the bottom of the second independent foundation 122 and the top of the foundation pit supporting crown beam. In specific implementation, the cushion layer of the present invention is compacted with a material with a sand and gravel ratio of 7:3. The shear key 1114 is mainly used to enhance stability and reduce the probability of shear failure.

[0092] In a specific implementation, the first steel cage 1212 includes a plurality of first column inner longitudinal bars and a plurality of first column inner stirrups arranged in parallel, the first column inner longitudinal bars are fixed circumferentially along the first column inner stirrups to form the first steel cage 1212, the first foundation concrete 1211 is expansive concrete,

[0093] In the embodiment of the present invention, a plurality of groups of aluminum square grilles 314 are respectively installed on both sides of the double-layer stiffening rib 3114, a U-shaped groove 315 is provided between the double-layer stiffening rib 3114 and each group of aluminum square grilles 314, fixing screws 316 and gaskets 317 are provided on both sides of the U-shaped groove 315, the gaskets 317 are located between the double-layer stiffening rib 3114 and each group of aluminum square grilles 314, and the fixing screws 316 pass through the aluminum square grilles 314 and the anti-corrosion gaskets 39 and are fixed on the double-layer stiffening rib 3114. In specific implementation, the U-shaped groove 315 is an aluminum alloy U-shaped groove 315, the fixing screws 316 can be a stainless steel cross screw, and the gaskets 317 can be an anti-corrosion gasket 39.

[0094] The present invention sets a deformation joint 41 between the steel structure skeleton 1 and the louver frame 4 of the main structure of the building, and a stainless steel plate drainage ditch 42 is set on the upper part of the deformation joint 41. Because the structural beam of the main structure is in a tiger's mouth shape, a stainless steel plate drainage ditch 42 is set on the upper part of the deformation joint 41. By combining the deformation joint 41 with the stainless steel plate drainage ditch 42, the stainless steel plate drainage ditch 42 can be effectively used to collect and discharge rainwater or ground water, thereby improving the utilization rate of the space.

[0095] like Figure 25-27 As shown, the present invention installs an intermediate fixing beam 312 and a double-layer keel 313 at two parallel positions in the middle of each set of petal fixing frames 311, and the intermediate fixing beam 312 is fixed to the main steel beam of the steel structure frame through the double-layer keel 313 to form a hyperstatic structure with redundant constraints. By installing the intermediate fixing beam 312 and the double-layer keel 313 at two parallel positions in the middle of each set of petal fixing frames 311, the second aluminum single plate 32 wrapped outside each set of petal fixing frames 311 does not need to be provided with a main keel, which solves the problem of fixing large-area aluminum single plates.

[0096] like Figure 17-Figure 18 As shown, in the embodiment of the present invention, the upper end of the upper fixed frame 3111 of each double-layer four-leaf clover structure 31 is also installed with a tempered laminated glass 36, and an aluminum alloy single pressure plate 37, an aluminum alloy sub-frame 38, an anti-corrosion gasket 39, an expansion bolt 310, a fixing bracket 3101, and a fixing member 3102 are arranged between the second aluminum single plate 32 and the tempered laminated glass 36. One end of the fixing bracket 3101 is installed on the second aluminum single plate 32 through the fixing member 3102, and the aluminum alloy sub-frame 38 is located below the tempered laminated glass 36. The outer side of the upper end of the aluminum alloy sub-frame 38 is connected to the tempered laminated glass 36 through a sealant, and the lower end of the aluminum alloy sub-frame 38 is connected to the tempered laminated glass 36 through an aluminum One end of the alloy single pressure plate 37 is abutted, and the anti-corrosion gasket 39 is located below the aluminum alloy single pressure plate 37. The expansion bolt 310 passes through the other end of the aluminum alloy single pressure plate 37, the other end of the fixing bracket 3101, and the anti-corrosion gasket 39 from top to bottom and is fixed to the upper end of the upper fixing frame 3111. In specific implementation, the fixing member 3102 can be selected from the expansion bolt 310. A connecting glue seam is provided between the second aluminum single plate 32 and the tempered laminated glass 36. The inside of the connecting glue seam is filled with a polyethylene foam rod, and the outside of the polyethylene foam rod is applied with a neutral weather-resistant glue sealant. The tempered laminated glass 36 provided in the present invention can enhance the safety and sound insulation performance of the structure.

[0097] like Figure 27-Figure 29As shown, the hollow petal structure and the side of the light strip 3120 of the present invention are wrapped by the second aluminum single plate at the upper part of the four groups of petal fixing frames 311 of each double-layer four-leaf clover structure 31, and the light strip 3120 is installed in the middle of each double-layer four-leaf clover structure 31, and the ETFE light-transmitting film 34 is installed at the lower part of each double-layer four-leaf clover structure 31. The four groups of petal fixing frames 311 of each double-layer four-leaf clover structure 21 are reserved with an open detection port 319 in the middle where the ETFE light-transmitting film 34 converges, and four groups of rotating bearings 318 are installed on the outside of each double-layer four-leaf clover structure 31, and each group of rotating bearings 318 is located outside the ETFE light-transmitting film 34. The open detection port 319 is reserved in the middle where the ETFE light-transmitting film 34 converges, which is convenient for maintenance. If the LED light strip 3120 inside the ETFE light-transmitting film 34 is broken in the future, it is convenient for maintenance.

[0098] In specific implementation, the installation and construction process of the ETFE light-transmitting film 34 of the present invention includes:

[0099] Step 61) Hoisting of ETFE light-transmitting film 34: Packing the ETFE light-transmitting film 34 into a roll, and then hoisting it around the aluminum square tube lined with the large-span matrix steel structure;

[0100] Step 62) Laying the ETFE light-transmitting film 34: unwinding the ETFE light-transmitting film 34 that is packed into a roll, so that the ETFE light-transmitting film 34 gradually changes from a winding state to a spreading state, and is laid on the lower surface of the outer lining aluminum square tube at the lower part of the double-layer four-leaf clover structure 31;

[0101] Step 63) Installation before tensioning: install the membrane boundary aluminum strip on the outside of the aluminum square tube lining the steel structure, so that the membrane edge of the ETFE light-transmitting film 34 is covered inside the membrane boundary aluminum strip;

[0102] Step 64) tensioning the ETFE light-transmitting film 34: multiple tensioning devices are installed on the large-span matrix steel structure, and the tensioning devices are connected to the aluminum strips at the membrane boundaries, and then tension is applied simultaneously in a direction away from the ETFE light-transmitting film 34 through the tensioning devices on four sides of the ETFE light-transmitting film 34, thereby stretching the ETFE light-transmitting film 34;

[0103] Step 65) Fix after tensioning: After the boundary aluminum strips of the ETFE light-transmitting film 34 are tensioned into place, the tensioning device is removed from the aluminum square tube lining the steel structure, and then the boundary aluminum strips of the film are installed on the outermost edge of each double-layer four-leaf clover structure 31, so that the tensioned ETFE light-transmitting film 34 can be fixed on the large-span matrix steel structure.

[0104] like Figure 30-Figure 31As shown, in the embodiment of the present invention, a solar photovoltaic panel 6 is embedded between the dust-repellent and hydrophobic glass and the curtain wall of the building facade. The solar photovoltaic panel 6 is supported and fixed by a photovoltaic fixed bracket 61. A clean water guide trough 51 is installed around the dust-repellent and hydrophobic glass 5. In specific implementation, the dust reduction spray structure provided by the present invention includes a dust reduction spray head, a spray telescopic pipe, and a water pumping pipe. The dust reduction spray head is connected to one end of the spray telescopic pipe, and the other end of the spray telescopic pipe is connected to the water pumping pipe. A booster pump is installed on the water pumping pipe. The booster pump on the water pumping pipe can pump water into the spray telescopic pipe and spray it through the dust reduction spray head. The staff can adjust the length of the spray telescopic pipe according to the needs of use, so that the dust reduction spray structure can be used according to the on-site construction conditions. The dust reduction spray head can always be kept above the dust to suppress the dust, thereby increasing the spray dust reduction effect, thereby further increasing the range of dust reduction spraying, and the dust reduction efficiency and cleaning quality are better. The dust suppression spray structure installed by the present invention is retractable, which is vertical when in use and retracted when closed. A solar photovoltaic panel 6 is installed to collect solar energy and convert it into electrical energy. Energy is stored through the solar photovoltaic panel 6, which also improves energy utilization efficiency and reduces the impact on the environment, providing an effective solution for sustainable buildings.

[0105] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not limit the scope of implementation of the present application. That is, all equivalent changes and modifications made within the scope of the present application should still fall within the scope of the present invention.

Claims

1. A construction method for a hollow matrix steel structure combined porch, characterized in that: The construction method includes the following construction process: Step 1) Construction of enlarged foot independent foundation: The enlarged foot independent foundation of the steel structure column is divided into 2 rows, the first row stands on the foundation pit support crown beam, and the second row stands on the basement top plate; Step 2) Steel structure component assembly (beam-column) construction: a number of main steel beams and a number of secondary steel beams form a frame, a number of main steel beams are spaced apart from each other, a number of secondary steel beams are spaced apart from each other, a number of main steel beams and a number of secondary steel beams are staggeredly connected with high-strength bolts and supported by steel columns to form a steel structure skeleton; Step 3) Construction platform construction: lay a fine stone concrete cushion layer on the ground, set up a Mantanghong scaffolding and unloading platform on the fine stone concrete cushion layer, and use the Mantanghong scaffolding and unloading platform to install several double-layer "four-leaf clover" structure petals and the outer aluminum veneer of the entire structure; Step 4) Construction of hollow matrix flower rack: A plurality of double-layer four-leaf clover structures are laid on the main steel beams and secondary steel beams of the steel structure skeleton. The plurality of double-layer four-leaf clover structures are laid on the main steel beams and secondary steel beams of the steel structure skeleton in a hollow matrix to form a hollow matrix flower rack. Each double-layer four-leaf clover structure includes four sets of petal fixing frames. Each set of petal fixing frames includes an upper fixing frame, a lower fixing frame, and a plurality of secondary keels. The plurality of secondary keels are spaced apart and distributed between the upper fixing frame and the lower fixing frame. The frame is fixed on the top of the lower fixed frame through several secondary keels. The upper and lower parts of the upper fixed frame and the lower fixed frame form a hollow petal structure. Two double-layer stiffening ribs are fixed inside each set of petal fixing frames. The two double-layer stiffening ribs are parallel to each other. The upper fixed frame and the lower fixed frame of each set of petal fixing frames are welded by a combination of several hot-dip galvanized steel pipes. Several hot-dip galvanized steel pipes are hoisted to the unloading platform by a car crane and distributed to the installation area of ​​each double-layer four-leaf clover structure for welding; Step 5) Double-layer "four-leaf clover" edge wrapping construction: After the four sets of petal fixing frames of several double-layer four-leaf clover structures are completed, the outside of each set of petal fixing frames of each double-layer four-leaf clover structure is wrapped with a second aluminum single plate; Step 6) ETFE light-transmitting film construction: After the ETFE light-transmitting film is rolled up, it is hoisted around the aluminum square tube of the outer lining of the steel structure, unfolded and laid on the lower surface of the aluminum square tube, the film boundary aluminum strip is installed and the film edge is covered, and the film is stretched to an appropriate length by a tensioning device, and finally the tensioning device is removed, and the film boundary aluminum strip is fixed to the edge of the double-layer four-leaf clover structure to complete the installation of the ETFE light-transmitting film on the large-span steel structure; Step 7) Lighting equipment installation: LED lights are placed at the bottom and ends of the hollow matrix flower stand; Step 8) Construction of dust-repellent and hydrophobic glass: Dust-repellent and hydrophobic glass is installed on the double-layer "four-leaf clover" structure in the middle of the hollow matrix flower stand, and a dust-repellent spray structure arranged in a matrix is ​​installed above the dust-repellent and hydrophobic glass; Step 9) Edge fixing of the steel structure skeleton: The steel column of the steel structure skeleton is edged with the first aluminum single plate, and a bracket and a connecting piece are provided between the inner side of the first aluminum single plate and the steel column, and the first aluminum single plate passes through the bracket through the connecting piece and is locked to achieve the fixation of the steel column and the first aluminum single plate; Step 10) Construction of cantilevered landscape platform: cantilevered landscape platforms are arranged on the second and third floors of the steel structure skeleton. The cantilevered landscape platforms are welded by steel beams. The support platform of the cantilevered landscape platform is composed of several groups of aluminum alloy grilles. The several groups of aluminum alloy grilles are arranged in parallel to each other to form the support platform of the cantilevered landscape platform. The steel beams of the cantilevered landscape platform are edged by the third aluminum single plate. Step 11) All construction platforms are dismantled.

2. The construction method of the hollow matrix steel structure combined porch according to claim 1 is characterized by: In the above step 1), the center point of the enlarged foot independent foundation of the steel structure skeleton coincides with the center point of a plurality of double-layer "four-leaf clover" structures, so that the force transmission of the plurality of double-layer four-leaf clover structures is uniform.

3. The construction method of the hollow matrix steel structure combined porch according to claim 1 is characterized by: In the above step 1), the steel columns include a first row of supporting steel columns and a second row of supporting steel columns, the first row of supporting steel columns includes a plurality of first supporting steel columns, two of which have independent foundations supported on the top plate of the basement driveway auxiliary structure, the enlarged foot independent foundation includes a first independent foundation and a second independent foundation, the first row of supporting steel columns is supported on the first independent foundation and connected thereto, the first row of supporting steel columns includes a plurality of first supporting steel columns, a column base plate, and a column base anchor bolt, the column base anchor bolt is fixed to the bottom end of the first supporting steel column, the column base plate is annular, and the column base plate is provided with a plurality of An anchor hole for installing column foot anchor bolts, the column base plate is inserted into the anchor hole through the column foot anchor bolts so as to be paved on the upper end of the first independent foundation, the first independent foundation includes a first foundation concrete and a first steel cage, the first steel cage is tied inside the first foundation concrete, a shear key is arranged at the bottom of the first supporting steel column, and the first supporting steel column is connected to the first steel cage through the shear key at the bottom; the second row of supporting steel columns is supported on the second independent foundation, the second independent foundation is located on the foundation pit support crown beam of the structure, and a 300mm thick cushion layer is arranged between the bottom of the second independent foundation and the top of the foundation pit support crown beam.

4. The construction method of the hollow matrix steel structure combined porch according to claim 1 is characterized by: In the above step 2), a deformation joint is arranged between the steel structure skeleton and the main structure louver frame, and a stainless steel plate drainage ditch is arranged on the upper part of the deformation joint.

5. The construction method of the hollow matrix steel structure combined porch according to claim 1 is characterized by: In the above step 4), an intermediate fixing beam and a double-layer keel are installed at two parallel positions in the middle of each set of petal fixing frames, and the intermediate fixing beam is fixed to the main steel beam of the steel structure frame through the double-layer keel to form a hyperstatic structure with redundant constraints.

6. The construction method of the hollow matrix steel structure combined porch according to claim 1 is characterized by: In the above step 4), tempered laminated glass is also installed on the upper end of the upper fixed frame of each double-layer four-leaf clover structure, and an aluminum alloy single pressure plate, an aluminum alloy sub-frame, an anti-corrosion gasket, an expansion bolt, a fixing bracket, and a fixing are provided between the second aluminum single plate and the tempered laminated glass. One end of the fixing bracket is installed on the second aluminum single plate through the fixing member, the aluminum alloy sub-frame is located below the tempered laminated glass, the outer side of the upper end of the aluminum alloy sub-frame is connected to the tempered laminated glass through a sealant, the lower end of the aluminum alloy sub-frame is abutted by one end of the aluminum alloy single pressure plate, the anti-corrosion gasket is located below the aluminum alloy single pressure plate, and the expansion bolt passes through the other end of the aluminum alloy single pressure plate, the other end of the fixing bracket, and the anti-corrosion gasket from top to bottom and is fixed to the upper end of the upper fixed frame.

7. The construction method of the hollow matrix steel structure combined porch according to claim 1 is characterized by: In the above step 6), the installation and construction process of the ETFE light-transmitting film includes: Step 61) ETFE light-transmitting film hoisting: pack the ETFE light-transmitting film into rolls, and then hoist it around the aluminum square tubes lined with the large-span matrix steel structure; Step 62) ETFE light-transmitting film laying: unwinding the ETFE light-transmitting film packaged in a roll, so that the ETFE light-transmitting film gradually changes from a winding state to a spreading state, and is laid on the lower surface of the outer lining aluminum square tube at the lower part of the double-layer four-leaf clover structure; Step 63) Installation before tensioning: install the membrane boundary aluminum strip on the outside of the aluminum square tube lining the steel structure, so that the membrane edge of the ETFE light-transmitting film is covered inside the membrane boundary aluminum strip; Step 64) ETFE light-transmitting film tensioning: multiple tensioning devices are installed on the large-span matrix steel structure, and the tensioning devices are connected to the aluminum strips at the membrane boundaries, and then tension is applied simultaneously in a direction away from the ETFE light-transmitting film through the tensioning devices on four sides of the ETFE light-transmitting film, thereby stretching the ETFE light-transmitting film; Step 65) Fix after tensioning: After the ETFE light-transmitting film boundary aluminum strips are tensioned into place, the tensioning device is removed from the aluminum square tube lining the steel structure, and then the membrane boundary aluminum strips are installed on the outermost edge of each double-layer four-leaf clover structure, so that the tensioned ETFE light-transmitting film can be fixed on the large-span matrix steel structure.

8. The construction method of the hollow matrix steel structure combined porch according to claim 1 is characterized by: In the above steps 6 and 7), the hollow petal structure and the side of the upper part of the four groups of petal fixing frames of each double-layer four-leaf clover structure are wrapped by the second aluminum single plate, a light strip is installed in the middle of each double-layer four-leaf clover structure, an ETFE light-transmitting film is installed at the bottom of each double-layer four-leaf clover structure, and the four groups of petal fixing frames of each double-layer four-leaf clover structure are equipped with an open detection port in the middle where the ETFE light-transmitting film converges, and four groups of rotating bearings are installed on the outside of each double-layer four-leaf clover structure, and each group of rotating bearings is located outside the ETFE light-transmitting film.

9. The construction method of the hollow matrix steel structure combined porch according to claim 1 is characterized by: In the above step 8), a solar photovoltaic panel is embedded between the dust-repellent and hydrophobic glass and the curtain wall of the building facade. The solar photovoltaic panel is supported and fixed by a photovoltaic fixed bracket, and a clean water guide groove is installed around the dust-repellent and hydrophobic glass.

10. The construction method of the hollow matrix steel structure combined porch according to claim 1 is characterized by: In the above step 10), several groups of aluminum square grilles are installed on both sides of the double-layer stiffening ribs, and a U-shaped groove is provided between the double-layer stiffening ribs and each group of aluminum square grilles. Fixing screws and gaskets are provided on both sides of the U-shaped groove. The gaskets are located between the double-layer stiffening ribs and each group of aluminum square grilles. The fixing screws pass through the aluminum square grilles and anti-corrosion gaskets and are fixed on the double-layer stiffening ribs.

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