Construction method of high altitude cantilevered steel concrete structure beam

Abstract

The present invention relates to a construction method for a high-altitude cantilevered steel-concrete structural beam, comprising the following steps: providing a steel beam and a cantilevered operating platform, connecting the cantilevered operating platform to one end of the steel beam on the ground; hoisting the steel beam connected to the cantilevered operating platform to a construction location, and positioning the cantilevered operating platform connected to the steel beam outside a building structure; arranging steel bars and formwork on the periphery of the hoisted steel beam within the building structure and pouring concrete; and utilizing the cantilevered operating platform to arrange steel bars and formwork at a portion of the steel beam located outside the building structure and pouring concrete, thereby completing the construction of the steel-concrete structural beam, forming the cantilevered operating platform by constructing connectors, support members, and a platform plate on the ground, and then hoisting the steel beam and the cantilevered operating platform onto the building, and fixing them by pouring concrete twice. The entire construction method avoids setting up the cantilevered operating platform at high altitude.

Description

Technical Field

[0001] The present invention relates to the field of building construction engineering, in particular to a construction method of a high-altitude cantilevered steel-concrete structural beam. Background Art

[0002] In current architectural design, in order to facilitate the lives of residents, commercial complexes are installed on the periphery of residential communities. Some buildings add a podium to the main building on the lower floors, directly combining residential buildings with commercial buildings to create a commercial complex with a tower and a podium. However, during the construction process, because the height of the podium is lower than that of the tower, if a high-altitude cantilevered steel-concrete structural beam is constructed at a position where the tower is higher than the podium, the height difference between the construction position and the working surface of the lower podium is too high. If a support system is directly set up on the lower slab, it will affect the construction of the lower structure, and the excessive height will pose a greater safety risk. Summary of the Invention

[0003] The purpose of the present invention is to overcome the defects of the prior art and provide a construction method for a high-altitude cantilevered steel-concrete structural beam, so as to solve the problem that during the existing construction process, because the height of the podium is lower than that of the tower, if a high-altitude cantilevered steel-concrete structural beam is constructed at a position where the tower is higher than the podium, the height difference between the construction position and the working surface of the lower podium is too high. If a support system is directly set up on the lower plate surface, it will affect the construction of the lower structure, and the excessive height will pose a greater safety risk.

[0004] The technical solution to achieve the above purpose is:

[0005] The present invention provides a construction method for a high-altitude cantilevered steel-concrete structural beam, which is characterized by comprising the following steps:

[0006] Providing a steel beam and a cantilevered operating platform, and connecting the cantilevered operating platform to one end of the steel beam at the ground;

[0007] Hoisting the steel beam connected to the cantilevered operating platform to the construction site, and positioning the cantilevered operating platform connected to the steel beam outside the building structure;

[0008] Arranging steel bars and formwork around the periphery of the hoisted steel beam within the building structure and pouring concrete; and

[0009] The cantilevered operating platform is used to set steel bars and formwork at the portion of the steel beam located outside the building structure and to pour concrete, thereby completing the construction of the steel-concrete structural beam.

[0010] A further improvement of the construction method of the high-altitude cantilevered steel-concrete structural beam of the present invention is that the cantilevered operating platform provided includes a connector, a support member, and a platform plate, and connecting the cantilevered operating platform to one end of the steel beam at the ground includes the following steps:

[0011] Lap one end of the connecting piece on one end of the steel beam, and position the other end of the connecting piece below the steel beam to form a connecting portion;

[0012] Connecting the support member to the connecting parts of the connecting members located on both sides of the steel beam and arranged correspondingly;

[0013] The platform plate is laid on the support member, and the platform plate is located below the steel beam.

[0014] A further improvement of the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention is that the provided connecting member is U-shaped, including a pair of wing rods arranged opposite to each other and a supporting rod connected to one end of the pair of wing rods, and the other ends of the pair of wing rods are bent to form a horizontal overlapping section;

[0015] Overlapping the overlapping section of the connector on one end of the steel beam and fixing it to the steel beam, the supporting rod of the connector is located below the steel beam to form the connecting portion;

[0016] When connecting the support member, the support member is placed on the supporting rod and fixedly connected to the supporting rod.

[0017] A further improvement to the construction method of the high-altitude cantilevered steel-concrete structural beam of the present invention is that when the connecting parts are overlapped on the steel beam, the connecting parts are relatively arranged on both sides of the steel beam, and a pair of the connecting parts are overlapped on the top of the steel beam, and the other pair of the connecting parts are overlapped on the bottom of the steel beam.

[0018] A further improvement of the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention is that before laying the platform plate, a main beam is provided, the main beam is laid on the support member at intervals, and then the platform plate is laid on the main beam.

[0019] A further improvement of the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention is that before laying the platform plate, reinforcing ribs are provided, the reinforcing ribs are laid on the main beam, and then the platform plate is laid on the reinforcing ribs.

[0020] A further improvement of the construction method of the high-altitude cantilevered steel-concrete structural beam of the present invention is that before providing the steel beam and the cantilevered operating platform, a plurality of brackets are arranged on the ground;

[0021] After the section steel beam is provided, the section steel beam is placed on the bracket to suspend the section steel beam.

[0022] A further improvement of the construction method of the high-altitude cantilevered steel-concrete structural beam of the present invention is that the setting of the support on the ground includes the following steps:

[0023] Provide upright posts and crossbeams, set a pair of upright posts opposite to each other on the ground, support the crossbeam between the pair of upright posts and fixedly connect the pair of upright posts, thereby completing the setting of the bracket.

[0024] A further improvement of the construction method of the high-altitude cantilevered steel-concrete structural beam of the present invention is that after the steel beam is placed on the bracket, a temporary support rod is provided, and the temporary support rod is obliquely supported between the side of the steel beam and the ground.

[0025] A further improvement of the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention is that when tying and laying the steel bars and formwork in the building structure, an inclined connection surface is reserved at the intersection with the outer side of the building structure.

[0026] The beneficial effects of the present invention are as follows: by supporting a steel beam bracket on the ground, the steel beam is lifted to a certain height, and a cantilevered operating platform is formed by constructing connectors, supports and platform plates, and then the steel beam and the cantilevered operating platform are hoisted to the building, and then concrete is poured twice to fix them, and an inclined connection surface is reserved during the first pouring to enhance the connection strength of the two concrete pourings. The entire construction method avoids the need to erect the cantilevered operating platform at high altitude. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the connection between the medium-shaped steel beam and the cantilevered operating platform in the construction method of the high-altitude cantilevered steel-concrete structural beam of the present invention.

[0028] Figure 2 This is a cross-sectional view of the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention, in which the medium-shaped steel beam is inserted into the building part and the casting is completed.

[0029] Figure 3 This is a cross-sectional view of the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention after the steel bars are tied to the medium-shaped steel beam.

[0030] Figure 4 It is a front view of a temporary support rod for a medium-sized steel beam in the construction method of a high-altitude cantilevered steel-concrete structural beam of the present invention.

[0031] Figure 5 It is a front view of the connection between the connecting member and the supporting member in the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention.

[0032] Figure 6 It is an oblique view of the connection between the connecting member and the supporting member in the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention.

[0033] Figure 7 It is a partial side view of the connecting parts and the supporting parts in the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention.

[0034] Figure 8 This is a connection diagram of the medium-sized steel beam, connecting parts and supporting parts in the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention.

[0035] Figure 9 This is a cross-sectional view of the support member of the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention.

[0036] Figure 10 The present invention is a front view of a support used in the construction method of a high-altitude cantilevered steel-concrete structural beam.

[0037] Figure 11 The figure is a side view of a bracket used in the construction method of the high-altitude cantilevered steel-concrete structural beam of the present invention.

[0038] Figure 12 The present invention is a flow chart of the construction method of the high-altitude cantilever steel-concrete structural beam.

[0039] 21- bracket, 211- column, 212- beam, 213- diagonal bar, 31- steel beam, 311- temporary support,

[0040] 41-connecting part, 411-wing rod, 412-lap section, 413-supporting rod, 51-supporting part, 511-main beam, 512-strengthening rib, 61-platform plate. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0042] The purpose of the present invention is to overcome the defects of the prior art and provide a construction method for high-altitude cantilevered steel-concrete structural beams to solve the problem that in the existing construction process, because the height of the podium is lower than that of the tower, if a high-altitude cantilevered steel-concrete structural beam is constructed at a position where the tower is higher than the podium, the height difference between the construction position and the working surface of the lower podium is too high. If a support system is directly set up on the lower plate surface, it will affect the construction of the lower structure, and there is a greater safety risk if the height is too high. By supporting the steel beam bracket on the ground, the steel beam is lifted to a certain height, and a cantilevered operating platform is formed by constructing connecting parts, supporting parts and platform plates, and then the steel beam and the cantilevered operating platform are hoisted to the building, and then concrete is poured twice to fix it, and an inclined connection surface is reserved during the first pouring to strengthen the connection strength of the two concrete pourings. The entire construction method avoids the construction of the cantilevered operating platform at high altitude.

[0043] The construction method of the high-altitude cantilever steel-concrete structural beam of the present invention is further described below.

[0044] See Figure 1 , showing a perspective view of the construction method of the high altitude cantilever steel concrete structural beam of the present invention before construction on a building. Figure 2 , showing a cross-sectional view of the completed casting of the high-altitude cantilever steel-concrete structural beam inserted into the building according to the construction method of the present invention.

[0045] The construction method of the high-altitude cantilever steel-concrete structural beam of the present invention comprises the following steps:

[0046] A steel beam 31 and a cantilevered operating platform are provided. The cantilevered operating platform is used as a construction platform for constructing the portion of the steel beam 31 cantilevered outside the building structure after the steel beam 31 is hoisted onto the building structure. The cantilevered operating platform is connected to one end of the steel beam 31 on the ground, and the other end of the steel beam 31 is not connected to the cantilevered operating platform and is inserted into the building structure to fix the steel beam 31 and balance the deadweight of the steel beam 31. The steel beam 31 connected to the cantilevered operating platform is hoisted to the construction location, and the cantilevered operating platform connected to the steel beam 31 is located outside the building structure. Rebars and formwork are set around the periphery of the hoisted steel beam 31 inside the building structure, and concrete is poured. The cantilevered operating platform is then used to set rebars and formwork on the portion of the steel beam 31 located outside the building structure, and concrete is poured, thereby completing the construction of the steel-concrete structural beam. Figure 12 , showing a flow chart of the construction method of the high-altitude cantilevered steel-concrete structural beam of the present invention.

[0047] See Figure 3, showing a cross-sectional view of the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention after tying steel bars. The cantilever operating platform provided includes a connector 41, a support member 51, and a platform plate 61. Connecting the cantilever operating platform to one end of the steel beam 31 at the ground includes the following steps: overlapping one end of the connector 41 on one end of the steel beam 31, and positioning the other end of the connector 41 below the steel beam 31 to form a connection portion; connecting the support member 51 to the connection portions of the connector 41 located on both sides of the steel beam 31 and correspondingly arranged; and laying the platform plate 61 on the support member 51, with the platform plate 61 positioned below the steel beam 31.

[0048] See Figure 5 and Figure 6 , showing the front view and oblique view of the connection between the connecting member 41 and the supporting member 51 in the high-altitude cantilever steel-concrete structural beam of the present invention.

[0049] Specifically, the provided connecting member 41 is U-shaped, including a pair of wing rods 411 arranged opposite to each other and a supporting rod 413 connected to one end of the pair of wing rods 411. The other end of the pair of wing rods 411 is bent to form a horizontal overlapping section 412. The overlapping section 412 of the connecting member 41 is overlapped on one end of the steel beam 31 and fixed to the steel beam 31 so that the connecting member 41 is assembled on the part of the steel beam 31 cantilevered out of the building. The supporting rod 413 of the connecting member 41 is located below the steel beam 31 to form a connecting portion. When connecting the support member 51, the support member 51 is placed on the supporting rod 413 and fixedly connected to the supporting rod 413 to achieve the connection and fixation between the connecting member 41 and the support member 51, and a platform plate 61 is laid on the support member 51 to form a cantilevered operating platform.

[0050] Furthermore, when the connecting members 41 are overlapped on the steel beam 31, the connecting members 41 are arranged oppositely on both sides of the steel beam 31, and a pair of the connecting members 41 are overlapped on the top of the steel beam 31, and the other pair of the connecting members 41 are overlapped on the bottom of the steel beam 31.

[0051] See Figure 8 , showing the connection diagram of the medium-section steel beam, connectors, and supports of the high-altitude cantilever steel-concrete structural beam of the present invention. Furthermore, the steel beam 31 is an H-beam. The upper portion of the connector 41 is fixed to the flange of the H-beam, and the lower portion of the connector 41 is fixedly connected to the support 51, so that the support 51 supports the platform plate 61 to form a cantilevered operating platform.

[0052] Specifically, the connecting piece 41 is first set on the upper surface of the lower wing plate of the H-shaped steel of the steel beam 31, and a pair of connecting pieces 41 are respectively set on both sides of the H-shaped steel. Then the connecting piece 41 is bent downward to form a connecting portion, and then another pair of connecting pieces 41 is set on the upper surface of the upper wing plate of the H-shaped steel of the steel beam 31, and the overlapping sections 412 of the two connecting pieces 41 are fixed together at the upper wing plate of the H-shaped steel to improve the structural strength. The connecting piece 41 is also bent downward to form a connecting portion. The connecting piece 41 must be a single piece bent through the entire length and must not be overlapped by short pieces to ensure its tensile strength.

[0053] Furthermore, before laying the platform plate 61 , main beams 511 are provided, the main beams 511 are laid on the support members 51 at intervals, and then the platform plate 61 is laid on the main beams 511 .

[0054] Furthermore, reinforcing ribs 512 are provided on the main beam 511 , and the reinforcing ribs 512 are provided along the direction of the steel beam 31 . The provision of the reinforcing ribs 512 improves the stability of the cantilevered operating platform.

[0055] In a preferred embodiment of the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention, a platform plate 61 is provided on the reinforcing rib 512 to form a cantilever operating platform. Preferably, the platform plate 61 is made of thick plywood to improve the durability of the cantilever operating platform.

[0056] Furthermore, the reinforcing ribs 512 are preferably steel-wood squares, and the support member 51 is also 16# I-steel. Φ48×3.0mm round steel is laid on the upper part of the 16# I-steel as the main beam 511 of the cantilevered operating platform and welded and positioned. The main beam 511 is set at a spacing of 150mm directly below the steel beam 31, and at a spacing of 350mm at the remaining positions on both sides of the steel beam 31; the reinforcing ribs 512 above the main beam 511 are secondary beams, and the secondary beams are made of 50×100mm steel square timber with a spacing of 200mm; the platform board 61 is laid above the steel square timber, and the platform board 61 is 15mm thick plywood. The platform board 61 also serves as the concrete bottom formwork of the steel beam 31. The total width of the operating platform is 1800mm, with a 700mm channel on each side. Protective railings are set on the outside of the channel, and the height of the railings is not less than 1.2m. The railings are welded with light steel mesh to reduce weight.

[0057] In another preferred embodiment of the construction method of the high-altitude cantilevered steel-concrete structural beam of the present invention, before providing a steel beam 31 and a cantilevered operating platform, a bracket 21 should be set up for the high-altitude cantilevered steel-concrete structural beam so that the high-altitude cantilevered steel-concrete structural beam is higher than the ground at an appropriate position. After providing the steel beam 31, the provided steel beam 31 is placed on the bracket 21 to suspend the steel beam 31.

[0058] Specifically, the steps of setting the bracket 21 on the ground include: Figure 10 and Figure 11 As shown, columns 211 and beams 212 are provided, a pair of columns 211 are erected opposite to each other on the ground, and the beams 212 are supported between the pair of columns 211 and fixedly connected to the pair of columns 211, thereby completing the setting of the bracket 21. The beams 212 fixedly connected between the two columns 211 serve as the support surface of the steel beam 31. Multiple bracket 21 structures are arranged corresponding to the length direction of the steel beam 31 to provide stable support for the steel beam 31. The beams 212 are made of 16# I-steel, and the columns 211 are made of 160mm×160mm×5mm rectangular steel, processed into an "H" shape.

[0059] In a preferred embodiment of the construction method of the high-altitude cantilever steel-concrete structural beam of the present invention, in order to make the bracket 21 more stable, inclined rods 213 are respectively set on both sides of the column 211. The inclined rods 213 are Φ48×3.0mm steel pipes. The steel pipe supports an angle of 45 with the ground and are welded to both sides of the column 211. Arc welding is used for welding, and double-sided full welding is required. The welds must be full, uniform, without leaks and sand holes.

[0060] See Figure 4 , showing a front view of a temporary support rod for a medium-sized steel beam in the construction method of a high-altitude cantilevered steel-concrete structural beam of the present invention.

[0061] The steel beam 31 is hoisted onto several supports 21 so that the steel beam 31 is above the ground for subsequent assembly construction. After the steel beam 31 is placed on the supports 21, temporary support rods 311 are provided and the temporary support rods 311 are obliquely supported between the side of the steel beam 31 and the ground.

[0062] Specifically, the temporary support rods 311 on both sides of the steel beam 31 are Φ48×3.0mm and are welded to the steel beam 31 at intervals of 2000mm, forming an eight-shaped temporary diagonal support with the ground to prevent the steel beam 31 from tipping over, ensuring the stability of the steel beam 31, and ensuring that during subsequent construction operations, the steel beam 31 will not fall sideways on the bracket 21, avoiding construction accidents.

[0063] Preferably, before construction, the BIM model of the high-altitude cantilevered steel-concrete structural beam is first established using REVIT software, the model is deepened, and the final model is determined based on the on-site construction conditions. The BIM simulation software is then used to simulate the lifting of the high-altitude cantilevered steel-concrete structural beam to determine the best lifting route.

[0064] Further, such as Figure 2 As shown, when tying and laying the steel bars and formwork in the building structure, an inclined connection surface is reserved at the intersection with the outer side of the building structure.

[0065] After the supporting member 51 and the connecting member 41 are fixed, the temporary support rod 311 is removed.

[0066] All welding points of the operating platform must be fully welded, and the welds must be full and uniform, without any quality defects such as weld leaks and sand holes.

[0067] After the welding of steel beam 31 and the cantilever operating platform is completed and accepted, they will be hoisted together using a tower crane. Before hoisting, a trial lift should be conducted, first lifting 500mm above the ground. If there are no abnormalities, hoist to the construction location. During hoisting, no one should stand below or along the hoisting route. The hoisting operation should be directed by a professional signalman.

[0068] During lifting, the lifting route should be followed as simulated by BIM to ensure that the tower crane meets the lifting requirements along the lifting route and always keeps the lifting weight balanced.

[0069] After hoisting to the construction site, professional steel structure construction personnel will carry out the construction. Before the steel beam 31 is firmly fixed, no materials or people should be stacked on the operating platform. The construction bolts of the steel beam 31 are tightened in three steps: initial tightening, re-tightening, and final tightening.

[0070] The formwork is constructed using 15mm thick plywood, the secondary beams are 50*100mm steel square timber, and the main beam 511 is reinforced with Φ48*3.0mm double steel pipes with butterfly clips. Formwork construction must ensure tight joints and prevent mortar leakage. After all formwork is completed, it should be inspected and accepted.

[0071] Concrete pouring is carried out. First, concrete is poured on the part of the steel beam 31 inserted into the building to increase the deadweight of the non-cantilevered section of the steel beam 31 to ensure the overall balance when pouring the cantilevered section. An inclined connecting surface is poured at the junction of the poured part and the cantilevered part, and then concrete is poured on the part of the steel beam 31 cantilevered out of the building.

[0072] The cantilever section concrete should be poured one hour after the non-cantilever section is finished. The cantilever section concrete should be poured first at the front end of the cantilever section, then gradually poured to the column edge, where it will join the non-cantilever section concrete to avoid cracking at the joint. The concrete should be vibrated promptly during the pouring process to ensure the concrete is dense and complete.

[0073] Curing and removing the formwork from the poured concrete is essential. Curing must be carried out promptly after pouring, and the curing time must not be less than the time required by the specification. This is a cantilever structure. The beam side formwork can only be removed after the concrete strength reaches 2.5 MPa, and the beam bottom formwork can only be removed after the concrete strength reaches 100% of the design strength grade. The formwork should be tapped gently when removed to avoid damaging the concrete structure's corners. After removal, protective measures should be taken for the finished concrete.

[0074] The bottom formwork is removed along with the operating platform. During removal, the operating platform and bottom formwork are hoisted with a tower crane. All diagonal reinforcement bars of the operating platform are manually cut, and then the entire structure is hoisted to the ground. Cement slurry or anti-rust paint is applied to the cut surfaces of the diagonal reinforcement bars to seal them tightly and prevent rusting.

[0075] The present invention has been described in detail above with reference to the embodiments of the accompanying drawings. A person skilled in the art can make various modifications to the present invention based on the above description. Therefore, certain details in the embodiments should not be construed as limiting the present invention. The scope of protection of the present invention shall be determined by the scope defined in the appended claims.

Claims

1. A construction method for a high-altitude cantilevered steel-concrete structural beam, characterized in that: The steps include: Providing a steel beam and a cantilevered operating platform, and connecting the cantilevered operating platform to one end of the steel beam at the ground; Hoisting the steel beam connected to the cantilevered operating platform to the construction site, and positioning the cantilevered operating platform connected to the steel beam outside the building structure; Arranging steel bars and formwork around the hoisted steel beams within the building structure and pouring concrete; as well as The cantilevered operating platform is used to set steel bars and formwork at the portion of the steel beam located outside the building structure and pour concrete, thereby completing the construction of the steel-concrete structural beam. The cantilever operating platform provided includes a connecting piece, a supporting piece, and a platform plate. Connecting the cantilever operating platform to one end of the steel beam at the ground includes the following steps: Lap one end of the connecting piece on one end of the steel beam, and position the other end of the connecting piece below the steel beam to form a connecting portion; Connecting the support member to the connecting parts of the connecting members located on both sides of the steel beam and arranged correspondingly; Laying the platform plate on the support member, with the platform plate located below the steel beam; The connecting member provided is U-shaped and includes a pair of wing rods arranged opposite to each other and a supporting rod connected to one end of the pair of wing rods, and the other ends of the pair of wing rods are bent to form a horizontal overlapping section; Overlapping the overlapping section of the connector on one end of the steel beam and fixing it to the steel beam, the supporting rod of the connector is located below the steel beam to form the connecting portion; When connecting the support member, the support member is placed on the supporting rod and fixedly connected to the supporting rod.

2. The construction method of the high altitude cantilever steel concrete structural beam according to claim 1, characterized in that: When the connecting pieces are overlapped on the steel beam, the connecting pieces are arranged on both sides of the steel beam opposite to each other, and one pair of the connecting pieces is overlapped on the top of the steel beam, and the other pair of the connecting pieces is overlapped on the bottom of the steel beam.

3. The construction method of the high altitude cantilever steel concrete structural beam according to claim 1, characterized in that: Before laying the platform slab, main beams are provided, the main beams are laid on the support members at intervals, and then the platform slab is laid on the main beams.

4. The construction method of the high altitude cantilever steel concrete structural beam according to claim 3, characterized in that: Before laying the platform plate, reinforcing ribs are provided, the reinforcing ribs are laid on the main beams, and then the platform plate is laid on the reinforcing ribs.

5. The construction method of the high altitude cantilever steel concrete structural beam according to claim 1, characterized in that: Before providing the steel beam and the cantilevered operating platform, a plurality of brackets are set on the ground; After the section steel beam is provided, the section steel beam is placed on the bracket to suspend the section steel beam.

6. The construction method of the high altitude cantilever steel concrete structural beam according to claim 5, characterized in that: Setting the support on the ground includes the following steps: Provide upright posts and crossbeams, set a pair of upright posts opposite to each other on the ground, support the crossbeam between the pair of upright posts and fixedly connect the pair of upright posts, thereby completing the setting of the bracket.

7. The construction method of the high altitude cantilever steel concrete structural beam according to claim 5, characterized in that: After the section steel beam is placed on the support, a temporary support rod is provided, and the temporary support rod is obliquely supported between the side of the section steel beam and the ground.

8. The construction method of the high altitude cantilever steel concrete structural beam according to claim 1, characterized in that: When tying and laying the steel bars and formwork in the building structure, an inclined connection surface is reserved at the intersection with the outer side of the building structure.

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