A super high-rise steel-concrete structure truss layer and construction method

Abstract

The present invention discloses a super-high-rise steel-concrete structure truss layer and construction method, comprising multiple truss layers, wherein a core tube is provided between the middle portions of adjacent truss layers, and a concrete pouring layer is provided above the truss layer; step one, construction deduction; step two, tying the steel bars of the shear wall of the core tube on the first layer; step three, installing the steel frame of the core tube on the first layer; step four, installing the steel columns on the first layer; step five, sequentially hoisting and adjusting the elevation of the steel beams on the first layer; step six, installing the V-shaped support assembly; step seven, installing the cantilevered crossbeam; step eight, tying the steel bars between the steel columns on the first layer; step nine, assembling and caulking the formwork on the first layer; step ten, pouring the concrete on the first layer; and step eleven, constructing the upper steel-concrete structure truss layer. The super-high-rise steel-concrete structure truss layer can form a stable super-high-rise steel-concrete structure. The construction method rationally connects the various processes and shortens the construction period.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to a super-high-rise steel-concrete structure truss layer and a construction method thereof. Background Art

[0002] With rapid economic development and accelerated urban construction, super-high-rise office buildings are becoming increasingly common. Core-tube steel frames are favored in structural design due to their excellent lateral load resistance. However, for economic reasons and to improve the comfort of future small owners, there is still market demand for super-high-rise buildings with all-concrete structures.

[0003] In order to ensure the overall rigidity of the all-concrete super-high-rise, a steel-concrete composite truss reinforcement layer was designed. However, the combination of steel structure and concrete resulted in many problems in the actual construction process: (1) The construction process of the steel-concrete structure is different from that of the all-concrete structure floor, and the whole floor flow operation cannot be connected; (2) Due to the large amount of welding work, the construction quality is difficult to control; (3) The number of on-site steel beams, steel columns and cantilever beam components is large, and the tower crane hoisting pressure is high, making it difficult to advance the construction progress; (4) The V-shaped support components need to be installed after the structure is capped. At this time, large vertical transportation machinery cannot be used on the floor, and manual transportation is required, which is very dangerous; (5) The formwork and steel structure are both rigid materials. The dimensional deviation of the on-site construction of the two is difficult to adjust, and the connection is difficult.

[0004] In response to the above-mentioned difficult and key issues, technical personnel carried out scientific and technological research, and proposed a super-high-rise steel-concrete structure truss layer and construction method to address the construction process issues of the truss layer and the full concrete structure floor. Summary of the Invention

[0005] The purpose of the present invention is to provide a super high-rise steel-concrete structure truss layer and a construction method, which solves the above-mentioned problems existing in the actual engineering construction process of the steel-concrete composite truss reinforcement layer.

[0006] To achieve the above object, the present invention adopts the following technical solutions:

[0007] A super high-rise steel-concrete structure truss layer, comprising multiple truss layers, a core tube is provided between adjacent truss layers, and a concrete pouring layer is provided above the truss layers;

[0008] The core tube includes a core tube steel frame, a steel beam support frame is arranged in the core tube steel frame, and the steel beam support frame is supported in the core tube steel frame;

[0009] The truss layer includes a truss layer steel frame, which is a hollow frame structure, and a reinforced concrete pouring layer is provided on the top of the truss layer steel frame;

[0010] The truss layer steel frame includes steel beams and steel columns. The steel columns are supported on the reinforced concrete casting layer. The steel beams are connected between two adjacent steel columns through an adjustable connection assembly. Two steel beams are connected above and below the two adjacent steel columns. A V-shaped support assembly is supported between the two steel beams arranged above and below. The V-shaped support assembly is connected to the steel beam arranged above through two hangers.

[0011] Preferably, the adjustable connecting assembly includes a mounting seat and a connecting bridge, the mounting seat is installed on the side of the steel column, and the mounting seat and the end of the steel beam are adjustably connected through the connecting bridge; the connecting bridge is arched and consists of a crossbeam and two connecting columns, and the two connecting columns are detachably installed at both ends of the crossbeam through fasteners.

[0012] Preferably, the V-shaped support assembly includes a first support beam, a second support beam, a top connecting seat, a connecting piece and a connecting seat. The connecting seat is arranged on the steel beam arranged below, and there are inclined ends at both ends of the connecting seat. The first support beam and the second support beam are connected to the two inclined ends through connecting pieces respectively. A top connecting seat is provided on the lower side of the steel beam arranged above. The top ends of the first support beam and the second support beam are both connected to the top connecting seat through connecting pieces, and the first support beam and the second support beam are distributed in a V shape.

[0013] Preferably, the connecting member includes an insert plate and a wing plate, and wing plates are vertically arranged on both sides of the insert plate. A slot is provided on the insert plate, and the slot is inserted into the connecting seat. The wing plate is temporarily connected to the first support beam and the second support beam through the connecting bridge and then welded and fixed.

[0014] Preferably, the steel beam supporting frame is a disc-type frame supporting system, which includes multiple vertical poles, and an elevation adjustment component is arranged on the top of the vertical poles; the elevation adjustment component includes multiple columns, which are telescopically installed on the top of the columns, and a U-shaped groove is installed on the top of the column, and the U-shaped groove is supported on the bottom of the beam of the core tube steel frame.

[0015] Preferably, a plurality of cantilever beams are cantilevered and connected in the middle of the truss layer, one end of the cantilever beam is connected to the steel beam or the steel column through the adjustable connection component, and the other end is connected to the core tube steel frame through the embedded plate.

[0016] Preferably, the embedded plate includes a steel plate and a plurality of connecting ribs arranged on one side of the steel plate, the steel plate is installed at the end of the cantilever beam, and the end of the connecting rib is connected to the core tube steel frame.

[0017] A construction method for a super-high-rise steel-concrete structure truss layer comprises the following steps:

[0018] Step 1: Construction simulation: Create a 3D model of the steel-concrete structure truss layer, add a steel bar model for collision analysis, and optimize connection nodes;

[0019] Step 2: Tie the steel bars of the first core tube shear wall:

[0020] Step 3: Install the first-layer core tube steel frame: Build the first-layer steel beam support frame, and then build the first-layer core tube steel frame based on the first-layer steel beam support frame;

[0021] Step 4: Installation of first-layer steel columns;

[0022] Step 5: hoist and adjust the elevation of the first layer of steel beams in sequence: first, weld the mounting seat at the designed position on the side of the steel column, then hoist the steel beam horizontally to the mounting seat, connect the end of the steel beam to the mounting seat through the connecting bridge, and adjust the connection position of the crossbeam and the connecting column through fasteners to achieve horizontal adjustment of the steel beam. After the steel beam elevation and horizontality are tested to be qualified, weld the end of the steel beam to the mounting seat;

[0023] Step 6, V-shaped support assembly installation: weld a connecting seat on the steel beam arranged at the bottom, install connecting pieces at both ends of the first support beam and the second support beam respectively, lift the first support beam and the second support beam to the designed position in turn, plug the connecting pieces into the connecting seat and temporarily fix them with fasteners, and after the first support beam and the second support beam pass the support strength test, weld the connecting pieces to the connecting seat, weld the connecting pieces to the first support beam, and weld the connecting pieces to the second support beam in turn;

[0024] Step 7, cantilever beam installation: first install the embedded plate on one end of the cantilever beam, then hoist the cantilever beam horizontally to the designed elevation, and install the other end on the steel beam or the steel column through the adjustable connection assembly, and connect the connecting reinforcement to the first-floor core tube steel frame;

[0025] Step 8: Tie the steel bars between the first layer of steel columns: Arrange the steel bars on the upper and lower sides of the steel beams and the upper and lower sides of the cantilevered beams, tie the ends of the steel bars to the steel columns, and then remove the first layer of steel beam support cradles;

[0026] Step 9: Assembling and sealing the first layer of formwork: Use BIM software to deepen the formwork, reserve space between the formwork and the steel beams and cantilever beams, install a U-shaped opening in the reserved space, and plug the formwork into the U-shaped opening to form the first layer of casting formwork. Reserve gaps between the formwork and the steel beams and between the formwork and the cantilever beams, and seal the gaps with foam glue;

[0027] Step 10, pouring the first layer of concrete: pouring concrete in the first layer of pouring formwork to form a reinforced concrete pouring layer;

[0028] Step 11, construction of the upper steel-concrete structure truss layer: repeat steps 2 to 10 until the construction of multiple truss layers is completed.

[0029] Preferably, in step six, a lifting frame is used to lift the first support beam or the second support beam to the designed position; the lifting frame includes a ballast platform, a rectangular mounting frame, an electric hoist, a wire rope and a walking roller, a walking roller is installed at each of the four corners of the bottom of the ballast platform, a rectangular mounting frame is vertically installed on one side of the top of the ballast platform, an electric hoist is retractably installed at both corners of the top of the rectangular mounting frame through a chain, a grab hook is hung on the electric hoist, and the rectangular mounting frame and the other side of the top of the ballast platform are connected by multiple wire ropes.

[0030] In the present invention, the construction process of synchronous pouring of the entire layer is realized through deduction, the template system is optimized, the various working procedures are reasonably connected, and the construction period is shortened.

[0031] The core tube has only completed the steel bar binding and cannot form a rigid connection with the core tube steel frame. A steel beam support cradle is used to support the core tube steel frame. After the core tube steel frame and the cantilever beam are connected through embedded plates, the steel beam support cradle is removed. The steel beam support cradle can realize high-precision installation of the core tube steel frame.

[0032] The adjustable connection assembly can adjustably connect the steel beam between two adjacent steel columns. After adjusting the elevation and levelness of the steel beam, the end of the steel beam is welded and fixed. Therefore, the adjustable connection assembly not only has a temporary fixing function, but also can adjust the height and levelness. It is suitable for construction projects with large welding workloads, ensuring construction quality.

[0033] The cantilevered beam connects the core tube steel frame to the truss layer steel frame and is a key component for overall stability. The truss layer steel frame is supported by V-shaped bracing assemblies and reinforced by hangers, ensuring structural stability. One end of the cantilevered beam is connected to the truss layer steel frame via an adjustable connection assembly, and the other end is connected to the core tube steel frame via an embedded plate. Once the rebar is tied and concrete is poured, a stable super-high-rise steel-concrete structure is formed.

[0034] BIM software is used to deepen the template and reserve space, a U-shaped opening is set in the reserved space, and the template is inserted into the U-shaped opening to form a casting template, and the casting template does not need to be disassembled.

[0035] Because both the formwork and the truss layer steel frame are made of rigid materials, if there is a large size deviation between the two during on-site construction, there will be difficulties in connection. Gaps are reserved between the formwork and the steel beams, as well as between the formwork and the cantilevered beams, to absorb the size deviations. After the formwork is installed, the gaps are finally sealed with foam glue. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0037] Figure 2 It is a partial structural diagram of the present invention;

[0038] Figure 3 It is a schematic diagram of another part of the structure of the present invention;

[0039] Figure 4 This is a schematic diagram of the connector structure of the present invention;

[0040] Figure 5 This is a structural diagram of the lifting frame of the present invention;

[0041] In the figure: 1. Truss layer; 2. Core tube; 3. Steel beam support frame; 4. Lifting frame; 10. Truss layer steel frame; 20. Core tube steel frame; 21. Embedded plate; 30. Vertical pole; 31. Elevation adjustment assembly; 40. Ballast platform; 41. Rectangular mounting frame; 42. Electric hoist; 43. Wire rope; 44. Travel roller; 45. Grab hook; 100. Steel beam; 101. Steel column; 102. Adjustable connection assembly; 103. V-shaped support assembly; 104. Hanging rod; 105. Cantilever beam; 311. Vertical column; 312. U-shaped groove; 1020. Mounting seat; 1021. Connecting bridge; 1030. First support beam; 1031. Second support beam; 1032. Top connecting seat; 1033. Connecting piece; 1034. Connecting seat. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to the accompanying drawings:

[0043] like Figures 1 to 5 The illustrated super-high-rise steel-concrete structure truss layer includes multiple truss layers 1 , a core tube 2 is supported between the middle parts of adjacent truss layers 1 , and a concrete pouring layer is provided above the truss layers 1 .

[0044] The core tube 2 includes a core tube steel frame 20, within which a steel beam support cradle 3 is mounted. The steel beam support cradle 3 is supported within the core tube steel frame 20. The steel beam support cradle 3 is a disc-type cradle support system comprising a plurality of vertical poles 30, with elevation adjustment assemblies 31 disposed at the tops of the vertical poles 30. The elevation adjustment assembly 31 comprises a plurality of columns 311, which are telescopically mounted on the tops of the vertical poles 30. U-shaped channels 312 are mounted at the tops of the columns 311, which are supported at the bottoms of the crossbeams of the core tube steel frame 20.

[0045] The truss layer 1 includes a truss layer steel frame 10. The truss layer steel frame 10 is a hollow frame structure with a reinforced concrete casting layer arranged on top of the truss layer steel frame 10. The truss layer steel frame 10 includes steel beams 100 and steel columns 101. The steel columns 101 are supported on the reinforced concrete casting layer. The steel beams 100 are connected between two adjacent steel columns 101 via adjustable connection assemblies 102. Two steel beams 100 are connected above and below between two adjacent steel columns 101. A V-shaped support assembly 103 is supported between the two steel beams 100 arranged above and below. The V-shaped support assembly 103 is connected to the steel beam 100 arranged above via two hangers 104.

[0046] The adjustable connection assembly 102 includes a mounting base 1020 and a connecting bridge 1021. The mounting base 1020 is mounted on the side of the steel column 101. The mounting base 1020 is adjustably connected to the end of the steel beam 100 via the connecting bridge 1021. The connecting bridge 1021 is arched and consists of a crossbeam and two connecting columns. The two connecting columns are detachably mounted at both ends of the crossbeam using fasteners.

[0047] The V-shaped support assembly 103 includes a first support beam 1030, a second support beam 1031, a top connection seat 1032, a connector 1033, and a connection seat 1034. The connection seat 1034 is provided on the steel beam 100 arranged below. There are inclined ends at both ends of the connection seat 1034, and the first support beam 1030 and the second support beam 1031 are connected to the two inclined ends via connectors 1033. A top connection seat 1032 is provided on the lower side of the steel beam 100 arranged above. The top ends of the first support beam 1030 and the second support beam 1031 are both connected to the top connection seat 1032 via connectors 1033. The first support beam 1030 and the second support beam 1031 are arranged in a V shape.

[0048] The connecting member 1033 includes an insert plate and a wing plate. Wing plates are vertically arranged on both sides of the insert plate. A slot is provided on the insert plate, which is plugged into the connecting seat 1034. The wing plate is temporarily connected to the first support beam 1030 and the second support beam 1031 through the connecting bridge 1021 and then welded and fixed.

[0049] Multiple cantilever beams 105 are cantilevered in the middle of the truss layer 1. One end of the cantilever beam 105 is connected to the steel beam 100 or steel column 101 via an adjustable connection assembly 102, and the other end is connected to the core tube steel frame 20 via an embedded plate 21. The embedded plate 21 includes a steel plate and multiple connecting ribs arranged on one side of the steel plate. The steel plate is installed at the end of the cantilever beam 105, and the end of the connecting rib is connected to the core tube steel frame 20.

[0050] A construction method for a super-high-rise steel-concrete structure truss layer comprises the following steps:

[0051] Step 1: Construction simulation: Use Tekla Structures software to create a 3D model of the steel-concrete structure truss layer, add a steel bar model for collision analysis, and optimize connection nodes;

[0052] Step 2: Tie the steel bars of the first core tube 2 shear wall:

[0053] Step 3: Install the first layer core tube steel frame 20: Build the first layer steel beam support frame 3, and build the first layer core tube steel frame 20 based on the first layer steel beam support frame 3;

[0054] Step 4: Install the first layer of steel columns 101;

[0055] Step 5: The first layer of steel beams 100 are hoisted and adjusted in height in sequence: first, a mounting seat 1020 is welded at the designed position on the side of the steel column 101, and then the steel beam 100 is hoisted horizontally to the mounting seat 1020. The end of the steel beam 100 is connected to the mounting seat 1020 through the connecting bridge 1021, and the connection position between the crossbeam and the connecting column is adjusted by fasteners to adjust the horizontality of the steel beam 100. After the height and horizontality of the steel beam 100 are tested and qualified, the end of the steel beam 100 is welded to the mounting seat 1020.

[0056] Step 6, installation of the V-shaped support assembly 103: welding a connecting seat 1034 on the steel beam 100 arranged at the bottom, installing connectors 1033 at both ends of the first support beam 1030 and the second support beam 1031 respectively, lifting the first support beam 1030 and the second support beam 1031 to the designed positions in sequence, plugging the connector 1033 into the connecting seat 1034 and temporarily fixing them with fasteners, and after the first support beam 1030 and the second support beam 1031 pass the support strength test, weld the connector 1033 to the connecting seat 1034, weld the connector 1033 to the first support beam 1030, and weld the connector 1033 to the second support beam 1031 in sequence;

[0057] After the first layer of steel beams are hoisted, the V-shaped support assembly is limited in space during hoisting, and large vertical transportation machinery cannot be used. Therefore, a hoisting frame 4 is used to hoist the first support beam 1030 or the second support beam 1031 to the designed position;

[0058] The lifting frame 4 includes a ballast platform 40, a rectangular mounting frame 41, an electric hoist 42, a wire rope 43 and a travel roller 44. A travel roller 44 is installed at each of the four corners of the bottom of the ballast platform 40 to facilitate the movement of the lifting frame 4. When the lifting frame 4 is in operation, the travel roller 44 needs to be locked to prevent the lifting frame 4 from moving during operation.

[0059] A rectangular mounting frame 41 is vertically mounted on one side of the top of the weight platform 40. An electric hoist 42 is retractably mounted on the two corners of the top of the rectangular mounting frame 41 via a chain. A grab hook 45 is hung on the electric hoist 42. The lifting position and height of the two electric hoists 42 are adjusted by retracting the chain, so that the inclination angle of the line connecting the two grab hooks 45 is consistent with the installation angle of the first support beam 1030 or the second support beam 1031, thereby improving the flexibility and accuracy of the lifting.

[0060] The rectangular mounting frame 41 is connected to the other side of the top of the ballast platform 40 by a plurality of steel wire ropes 43, which reduces the overall weight of the lifting frame 4;

[0061] Step 7, cantilever beam installation: first install the embedded plate 21 at one end of the cantilever beam, then hoist the cantilever beam horizontally to the designed elevation, and install the other end on the steel beam 100 or the steel column 101 through the adjustable connection assembly 102, and connect the connecting ribs to the first-layer core tube steel frame 20;

[0062] During the construction project, due to the large number of steel beams, steel columns and cantilever beam components on site, the tower crane lifting pressure is high and the construction progress is difficult to advance. Therefore, it is necessary to use the lifting frame 4 to cooperate with the component lifting;

[0063] Step 8: Tie the steel bars between the first-layer steel columns 101: Arrange steel bars on the upper and lower sides of the steel beams 100 and the upper and lower sides of the cantilevered crossbeams, tie the ends of the steel bars to the steel columns 101, and then remove the first-layer steel beam support frame;

[0064] Step 9: Assembling and sealing the first layer of formwork: Use BIM software to deepen the formwork, reserve space between the formwork and the steel beam 100 and the cantilever beam, install a U-shaped opening in the reserved space, and plug the formwork into the U-shaped opening to form the first layer of casting formwork. Reserve gaps between the formwork and the steel beam 100 and between the formwork and the cantilever beam, and seal the gaps with foam glue.

[0065] Step 10, pouring the first layer of concrete: pouring concrete in the first layer of pouring formwork to form a reinforced concrete pouring layer;

[0066] Step 11, construction of the upper steel-concrete structure truss layer: repeat steps 2 to 10 until the construction of the multi-layer truss layer 1 is completed.

[0067] The above embodiments are merely some illustrations of the concept and implementation of the present invention, and are not intended to limit the same. Under the concept of the present invention, technical solutions that have not been substantially changed are still within the scope of protection.

Claims

1. A super high-rise steel-concrete structure truss layer, characterized by: It comprises multiple truss layers (1), a core tube (2) is provided between adjacent truss layers (1) for support, and a concrete pouring layer is provided above the truss layers (1); The core tube (2) comprises a core tube steel frame (20), a steel beam support frame (3) is provided in the core tube steel frame (20), and the steel beam support frame (3) is supported in the core tube steel frame (20); The truss layer (1) comprises a truss layer steel frame (10), the truss layer steel frame (10) is a hollow frame structure, and a reinforced concrete pouring layer is provided on the top of the truss layer steel frame (10); The truss layer steel frame (10) includes a steel beam (100) and a steel column (101), wherein the steel column (101) is supported on a reinforced concrete pouring layer, and the steel beam (100) is connected between two adjacent steel columns (101) via an adjustable connection assembly (102), and two steel beams (100) are connected above and below the two adjacent steel columns (101), and a V-shaped support assembly (103) is supported between the two steel beams (100) arranged above and below, and the V-shaped support assembly (103) is connected to the steel beam (100) arranged above via two suspension rods (104).

2. The super high-rise steel-concrete structure truss layer according to claim 1 is characterized in that: The adjustable connection assembly (102) comprises a mounting seat (1020) and a connecting bridge (1021), wherein the mounting seat (1020) is mounted on the side of the steel column (101), and the mounting seat (1020) is adjustably connected to the end of the steel beam (100) via the connecting bridge (1021); the connecting bridge (1021) is arched and consists of a crossbeam and two connecting columns, and the two connecting columns are detachably mounted at both ends of the crossbeam via fasteners.

3. The super high-rise steel-concrete structure truss layer according to claim 2 is characterized by: The V-shaped support assembly (103) comprises a first support beam (1030), a second support beam (1031), a top connecting seat (1032), a connecting piece (1033) and a connecting seat (1034); the connecting seat (1034) is arranged on the steel beam (100) arranged below; both ends of the connecting seat (1034) are inclined ends; the first support beam (1030) and the second support beam (1031) are connected to the two inclined ends via connecting pieces (1033); a top connecting seat (1032) is provided on the lower side of the steel beam (100) arranged above; the top ends of the first support beam (1030) and the second support beam (1031) are both connected to the top connecting seat (1032) via connecting pieces (1033); the first support beam (1030) and the second support beam (1031) are distributed in a V shape.

4. The super high-rise steel-concrete structure truss layer according to claim 3 is characterized by: The connecting member (1033) comprises an insert plate and a wing plate, with wing plates vertically arranged on both sides of the insert plate. The insert plate is provided with a slot, which is plugged into the connecting seat (1034). The wing plate is temporarily connected to the first support beam (1030) and the second support beam (1031) via the connecting bridge (1021) and then fixed by welding.

5. The super high-rise steel-concrete structure truss layer according to claim 1 is characterized in that: The steel beam support frame (3) is a disc-type frame support system, comprising a plurality of vertical poles (30), with a height adjustment assembly (31) provided on the top of the vertical poles (30); the height adjustment assembly (31) comprises a plurality of vertical columns (311), the vertical columns (311) being telescopically mounted on the top of the vertical poles (30), and a U-shaped groove (312) being mounted on the top of the vertical column (311), and the U-shaped groove (312) being supported on the bottom of the crossbeam of the core tube steel frame (20).

6. The super high-rise steel-concrete structure truss layer according to claim 1 or 2, characterized in that: A plurality of cantilevered beams (105) are cantilevered and connected in the middle of the truss layer (1), one end of the cantilevered beam (105) is connected to the steel beam (100) or the steel column (101) through the adjustable connection assembly (102), and the other end is connected to the core tube steel frame (20) through the embedded plate (21).

7. The super high-rise steel-concrete structure truss layer according to claim 6, characterized in that: The embedded plate (21) comprises a steel plate and a plurality of connecting ribs arranged on one side of the steel plate. The steel plate is mounted on the end of the cantilever beam (105), and the end of the connecting rib is connected to the core tube steel frame (20).

8. A construction method for a super high-rise steel-concrete structure truss layer according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Construction simulation: Create a 3D model of the steel-concrete structure truss layer, add a steel bar model for collision analysis, and optimize connection nodes; Step 2: Binding of shear wall reinforcement of the first core tube (2): Step 3, installation of the first layer core tube steel frame (20): building the first layer steel beam support tire frame (3), and building the first layer core tube steel frame (20) based on the first layer steel beam support tire frame (3); Step 4: installing the first layer of steel columns (101); Step 5, the first layer of steel beams (100) are hoisted and the elevation is adjusted in sequence: first, a mounting seat (1020) is welded at the designed position on the side of the steel column (101), and then the steel beam (100) is hoisted horizontally to the mounting seat (1020), and the end of the steel beam (100) is connected to the mounting seat (1020) through the connecting bridge (1021), and the connection position of the crossbeam and the connecting column is adjusted by fasteners to achieve the horizontal adjustment of the steel beam (100), and after the elevation and horizontality of the steel beam (100) are tested and qualified, the end of the steel beam (100) is welded to the mounting seat (1020); Step 6, installation of the V-shaped support assembly (103): welding a connecting seat (1034) on the steel beam (100) arranged at the bottom, installing connecting pieces (1033) at both ends of the first support beam (1030) and the second support beam (1031), lifting the first support beam (1030) and the second support beam (1031) to the designed positions in sequence, plugging the connecting piece (1033) into the connecting seat (1034) and temporarily fixing them with fasteners, and after the first support beam (1030) and the second support beam (1031) pass the support strength test, welding the connecting piece (1033) to the connecting seat (1034), welding the connecting piece (1033) to the first support beam (1030), and welding the connecting piece (1033) to the second support beam (1031) in sequence; Step 7, cantilever beam installation: first install the embedded plate (21) at one end of the cantilever beam, then hoist the cantilever beam horizontally to the design elevation, and install the other end on the steel beam (100) or the steel column (101) through the adjustable connection assembly (102), and the connection rib is connected to the first-layer core tube steel frame (20); Step eight, tying the steel bars between the first layer of steel columns (101): arranging steel bars on the upper and lower sides of the steel beam (100) and the upper and lower sides of the cantilevered crossbeam, tying the ends of the steel bars to the steel columns (101), and then removing the first layer of steel beam support cradles; Step nine, assembling and sealing the first layer of formwork: using BIM software to deepen the formwork, leaving space between the formwork and the steel beam (100) and the cantilever beam, installing a U-shaped opening at the reserved space, plugging the formwork into the U-shaped opening to form the first layer of casting formwork, and leaving gaps between the formwork and the steel beam (100) and between the formwork and the cantilever beam and sealing the gaps with foam glue; Step 10, pouring the first layer of concrete: pouring concrete in the first layer of pouring formwork to form a reinforced concrete pouring layer; Step 11, construction of the upper steel-concrete structure truss layer: repeat steps 2 to 10 until the construction of the multi-layer truss layer (1) is completed.

9. The construction method according to claim 8, characterized in that: In step six, a lifting frame (4) is used to lift the first support beam (1030) or the second support beam (1031) to the designed position; the lifting frame (4) includes a weight platform (40), a rectangular mounting frame (41), an electric hoist (42), a wire rope (43) and a walking roller (44), a walking roller (44) is installed at each of the four corners of the bottom of the weight platform (40), a rectangular mounting frame (41) is vertically installed on one side of the top of the weight platform (40), an electric hoist (42) is retractably installed at each of the two corners of the top of the rectangular mounting frame (41) through a chain, a grab hook (45) is hung on the electric hoist (42), and the rectangular mounting frame (41) and the other side of the top of the weight platform (40) are tied together by multiple wire ropes (43).

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