Support and construction method for upper component construction using lower steel box beam as support

Abstract

The present application discloses a support and construction method for constructing upper components by using the lower steel box beam as the load. The support for constructing upper components by using the lower steel box beam as the load includes: a support foundation and a first steel pipe support arranged on the support foundation; wherein the first steel pipe support is arranged below the lower steel box beam and used to support the lower steel box beam; a second steel pipe support, wherein the second steel pipe support is arranged on the upper surface of the lower steel box beam, and the upper end of the second steel pipe support is used to support the upper components. The present application solves the problems of slow construction progress, large amount of support consumption, and high construction safety risk in the steel box beam installation support in the related art.

Description

Technical Field

[0001] The present application relates to the field of steel box girder construction, and more specifically, to a support and a construction method for constructing upper components by using a lower steel box girder as a load. Background Art

[0002] With the continuous development of urban transportation, three-dimensional bridge transportation has become an effective means to relieve urban traffic pressure. Compared with concrete beams, steel box beams are more beautiful, environmentally friendly, light in weight and reliable in quality, and are widely used in urban transportation construction.

[0003] Under the premise that the bearing capacity of the foundation allows, the installation of steel box girders generally adopts the bracket method, using the lower foundation as a load-bearing device to install the upper structure. The conventional practice in the construction process of the upper and lower intersections of three-dimensional transportation is: 1. First, the upper structure is constructed, and after completion, the bracket is removed, and then the lower structure is constructed. However, this method will waste a lot of time waiting for the completion of the upper bridge construction. Under the condition of tight project schedule, it does not meet the construction progress requirements; 2. While the lower structure is being constructed, a Bailey doorway is set up at the bottom of the upper steel box girder to provide the necessary construction space for the lower bridge. However, this method will consume a large number of brackets, and the large cross-border doorway structure increases the safety risk of the project. Therefore, the steel box girder installation bracket in the relevant technology has the problems of slow construction progress, consumption of a large number of brackets, and high construction safety risks. Summary of the invention

[0004] The main purpose of the present application is to provide a bracket and construction method for constructing upper components using the lower steel box girder as the load, so as to solve the problems of slow construction progress, large consumption of brackets and high construction safety risks in the steel box girder installation bracket in the related technology.

[0005] In order to achieve the above-mentioned purpose, the present application provides a support for constructing upper components by using the lower steel box girder as the support, and the support for constructing upper components by using the lower steel box girder as the support comprises: a support base and a first steel pipe support arranged on the support base; wherein the first steel pipe support is arranged below the lower steel box girder and is used to support the lower steel box girder; a second steel pipe support, wherein the second steel pipe support is arranged on the upper surface of the lower steel box girder, and the upper end of the second steel pipe support is used to support the upper components.

[0006] Furthermore, the first steel pipe support and the second steel pipe support are both arranged at the web position of the lower steel box girder.

[0007] Furthermore, the bracket also includes a cantilever lower support arranged on the bracket base and an cantilever upper support arranged on the upper end of the lower steel box girder, the cantilever lower support and the cantilever upper support are coaxially arranged, wherein the cantilever lower support is connected to the flange of the lower steel box girder, and the cantilever upper support is used to support the upper components.

[0008] Furthermore, the cantilever lower support includes a cantilever lower steel pipe and a cantilever support arranged at the upper end of the cantilever lower steel pipe, the cantilever support and the cantilever steel pipe are coaxially arranged, the cantilever support is connected to the flange of the lower steel box girder, and the lower end of the cantilever lower steel pipe is connected to the support foundation; the cantilever upper support includes the cantilever upper steel pipe, the lower end of the cantilever upper steel pipe is welded to the lower steel box girder panel, and the upper end is used to support the upper components.

[0009] Furthermore, the support foundation includes a concrete foundation cast on the ground and a steel structure buried in the concrete foundation, and the lower end of the first steel pipe support and the lower end of the steel pipe at the lower part of the cantilever arm are welded to the steel structure.

[0010] Furthermore, the first steel pipe support includes a plurality of first steel pipe columns, which are distributed on both sides of the lower steel box girder and connected by horizontal braces and diagonal braces. The lower ends of the first steel pipe columns are welded to the steel structure, and the upper ends are connected to the web of the lower steel box girder.

[0011] Furthermore, the second steel pipe support includes multiple second steel pipe columns, adjacent second steel pipe columns are connected by flat braces and diagonal braces, the lower ends of the second steel pipe columns are welded to the upper end surface of the lower steel box beam and are located at the web position, and a longitudinal distribution beam is arranged at the upper end, and a transverse distribution beam is arranged on the longitudinal distribution beam, and the upper end of the transverse distribution beam is used to support the upper components.

[0012] Furthermore, the steel structure includes steel bars and steel plates welded to the upper ends of the steel bars, the steel bars are bent into a square shape and are arranged in at least three pieces, and the lower ends of the first steel pipe columns and the lower ends of the steel pipes at the lower ends of the cantilever arms are welded to the steel plates.

[0013] Furthermore, the number of the second steel tube columns is at least 8 and is evenly distributed on both sides of the lower steel box girder.

[0014] According to another aspect of the present application, there is provided a method for constructing a support for constructing an upper component by using a lower steel box beam as a support, comprising the following steps:

[0015] (1) Construction of support foundation: treat the foundation and pour concrete rectangular foundation;

[0016] (2) The first steel tube support is erected. The length of the first steel tube column is selected according to the elevation of the lower steel box girder. Adjacent first steel tube columns are connected by horizontal bracing and diagonal bracing. The first steel tube support is hoisted onto the support foundation and welded;

[0017] (3) Erection of the lower support of the cantilever arm: select the length of the lower support of the cantilever arm according to the elevation of the flange of the lower steel box girder, hoist the lower support of the cantilever arm onto the bracket foundation and weld it;

[0018] (4) Construction of the lower steel box girder: hoist the lower steel box girder to the first steel pipe support and the upper end of the cantilever lower support, and complete the initial splicing of the lower steel box girder and the welding of the segmented connecting plates;

[0019] (5) The second steel tube support is erected. The length of the second steel tube column is selected according to the elevation of the upper structure. The adjacent second steel tube columns are connected by horizontal bracing and diagonal bracing. The second steel tube columns are hoisted onto the lower steel box girder panel and welded;

[0020] (6) Erection of the cantilever upper support: select the length of the cantilever upper support according to the elevation of the upper structure, hoist the cantilever upper support to the lower steel box girder panel and weld it, and hoist the longitudinal distribution beam and the transverse distribution beam to the second steel pipe column and the upper end of the cantilever upper support in sequence;

[0021] (7) Construction of upper components: hoist the upper components to the upper end of the transverse distribution beam and the cantilever upper support.

[0022] Furthermore, the lower support of the cantilever arm includes:

[0023] (31) Making the steel pipe at the lower part of the boom;

[0024] (32) Weld the boom support at the upper end of the steel pipe at the lower part of the boom;

[0025] (33) Lift the lower support of the cantilever arm to the support foundation and weld it so that the lower support of the cantilever arm is located at the flange position of the lower steel box girder.

[0026] Furthermore, after the lower steel box girder is hoisted, the first steel pipe column corresponds to the web of the lower steel box girder, and the lower support of the cantilever arm corresponds to the flange of the lower steel box girder.

[0027] Furthermore, the upper support of the cantilever arm includes:

[0028] (61) Making the upper steel pipe of the boom;

[0029] (62) Hoist the upper steel pipe of the cantilever arm onto the lower steel box girder panel and weld it to make the upper steel pipe coaxial with the lower steel pipe.

[0030] In the embodiment of the present application, a lower steel box girder is used as a bearing structure. A support foundation is set, and a first steel pipe support is installed on the support foundation. The first steel pipe support is located below the lower steel box girder and is used to support the lower steel box girder. A second steel pipe support is installed on the upper surface of the lower steel box girder. The second steel pipe support is used to support the upper components. The purpose of using the lower steel box girder to carry the installation of the upper components is achieved, thereby saving construction time, accelerating construction progress, saving a large number of supports and Bailey supports, and achieving a high construction safety factor. The technical effect further solves the problems of slow construction progress, large consumption of supports, and high construction safety risks in the steel box girder installation support in the related technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0032] Figure 1 is a schematic diagram of the structure according to an embodiment of the present application;

[0033] Figure 2 is a schematic diagram of a side view structure according to an embodiment of the present application;

[0034] Figure 3 It is a schematic diagram of the arm position structure according to an embodiment of the present application;

[0035] Figure 4 is a structural schematic diagram of a steel structure according to an embodiment of the present application;

[0036] Figure 5 is a schematic diagram of a top view of a steel structure according to an embodiment of the present application;

[0037] Figure 6 It is a flow chart of the construction method according to the embodiment of the present application.

[0038] Among them, 1 is the support foundation, 2 is the first steel pipe support, 21 is the first steel pipe column, 3 is the lower steel box beam, 4 is the second steel pipe support, 41 is the second steel pipe column, 5 is the longitudinal distribution beam, 6 is the upper member, 7 is the transverse distribution beam, 8 is the cantilever upper support, 9 is the cantilever lower support, 10 is the steel structure, 101 is the steel plate, and 102 is the steel bar. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0040] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein.

[0041] In this application, the terms "upper", "lower", "inner", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0042] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0043] In addition, the terms "disposed", "provided with", "connected", "fixed" and the like should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0044] In addition, the term "plurality" shall mean two or more.

[0045] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0046] like Figures 1 to 6 As shown, an embodiment of the present application provides a support for constructing upper components by using the lower steel box girder as the load, and the support for constructing upper components by using the lower steel box girder as the load includes: a support foundation 1 and a first steel pipe support 2 arranged on the support foundation 1; wherein the first steel pipe support 2 is arranged below the lower steel box girder 3 and is used to support the lower steel box girder 3; a second steel pipe support 4, the second steel pipe support 4 is arranged on the upper surface of the lower steel box girder 3, and the upper end of the second steel pipe support 4 is used to support the upper component 6.

[0047] In this embodiment, if the support position is at the backfill soil or the original foundation pit backfill position, first use an excavator to remove the backfill soil and soft soil layer, and backfill and compact it with building bricks and stones or 6% gray soil. After the foundation treatment is completed, a C25 concrete rectangular foundation is poured. The support foundation 1 adopts a concrete enlarged foundation. The support foundation 1 includes a concrete foundation poured on the ground and a steel structure 10 buried in the concrete foundation. The lower end of the first steel pipe support 2 is welded to the steel structure 10, and the concrete foundation expands 750mm along the center line of the outer steel pipe. After the first steel pipe support 2 is assembled and welded on the ground, it is hoisted to the support foundation 1 by a crane, and then the lower steel box girder 3 is hoisted to the upper end of the first steel pipe support 2, and the second steel pipe support 4 is welded on the ground and hoisted to the lower steel box girder. 3 panels and welded, and then the upper component 6 is hoisted onto the second steel pipe support 4. Since the supporting structure of the lower steel box girder 3 is not removed, the bearing capacity of the lower steel box girder 3 is enhanced, and the weight of the upper component 6 is transferred to the ground through the second steel pipe support 4→lower steel box girder 3→first steel pipe support 2, so that the lower steel box girder 3 structure is fully utilized as a support, effectively saving support material consumption, and the construction of the upper component 6 can be carried out while the lower steel box girder 3 is being constructed, which speeds up the construction progress. Since the first steel pipe support 2 is used as a support, the support span is small and the construction safety factor is high.

[0048] The first steel pipe support 2 and the second steel pipe support 4 are both arranged at the web position of the lower steel box girder 3. When the weight of the upper component 6 is large, the first steel pipe support 2 and the second steel pipe support 4 are both installed at the positions corresponding to the web of the lower steel box girder 3, thereby ensuring the safety and stability of the lower steel box girder 3.

[0049] like Figures 1 to 6 As shown, the bracket also includes a cantilever lower support 9 arranged on the bracket foundation 1 and a cantilever upper support 8 arranged at the upper end of the lower steel box girder 3. The cantilever lower support 9 and the cantilever upper support 8 are coaxially arranged, wherein the cantilever lower support 9 is connected to the flange of the lower steel box girder 3, and the cantilever upper support 8 is used to support the upper component 6. The cantilever lower support 9 includes a cantilever lower steel pipe and a cantilever support arranged at the upper end of the cantilever lower steel pipe, the cantilever support is coaxially arranged with the cantilever steel pipe, the cantilever support is connected to the flange of the lower steel box girder 3, and the lower end of the cantilever lower steel pipe is connected to the bracket foundation 1; the cantilever upper support 8 includes a cantilever upper steel pipe, the lower end of the cantilever upper steel pipe is welded to the panel of the lower steel box girder 3, and the upper end is used to support the upper component 6.

[0050] like Figures 1 to 6 As shown, the lower support 9 of the cantilever arm and the upper support 8 of the cantilever arm are both located at the flange position of the lower steel box beam 3 and are coaxially arranged, so that the weight of the upper member 6 can be smoothly transferred to the ground, ensuring the stability of the upper member 6 and the stability of the lower steel box beam 3. The lower steel pipe of the cantilever arm and the upper steel pipe of the cantilever arm are both made of Steel pipe columns and cantilever supports are made of small steel pipes welded to the upper ends of the steel pipe columns and the connections are strengthened by stiffening ribs.

[0051] like Figures 1 to 6 As shown, the first steel pipe support 2 includes a plurality of first steel pipe columns 21, which are distributed on both sides of the lower steel box beam 3 and connected by horizontal braces and diagonal braces. The lower ends of the first steel pipe columns 21 are welded to the steel structure 10, and the upper ends are connected to the web of the lower steel box beam 3. The steel tube columns, horizontal braces and diagonal braces are all made of 14b channel steel. The lower end of the first steel tube column 21 is welded to the steel plate 101 in the steel structure 10, and the upper end is in conflict with the web position of the lower steel box beam 3.

[0052] like Figures 1 to 6 As shown, the steel structure 10 includes steel bars 102 and steel plates 101 welded to the upper ends of the steel bars 102. The steel bars 102 are bent into a square shape and are arranged in at least three pieces. The lower ends of the first steel pipe columns 21 and the lower ends of the steel pipes at the lower parts of the cantilever arms are welded to the steel plates 101, thereby improving the structural strength and stability of the support foundation 1.

[0053] like Figures 1 to 6 As shown, the second steel tube support 4 includes a plurality of second steel tube columns 41, and adjacent second steel tube columns 41 are connected by flat braces and diagonal braces. The lower ends of the second steel tube columns 41 are welded to the upper end surface of the lower steel box beam 3 and are located at the web position. The upper ends are provided with longitudinal distribution beams 5, and the longitudinal distribution beams 5 are provided with transverse distribution beams 7. The upper ends of the transverse distribution beams 7 are used to support the upper components 6. The second steel tube columns 41 are made of The steel pipe columns are connected by channel steel flat braces and diagonal braces (the diagonal braces are arranged at intervals) to increase their stability. The flat braces between the columns are made of 14b channel steel, and the diagonal braces are still made of 14b channel steel. They are welded together with the steel pipe columns through connecting plates. The longitudinal distribution beam 5 is made of double-pieced I56a I-beams, and the transverse distribution beam 7 is made of double-pieced I36b I-beams. Small steel pipes and jacks are set on the upper part of the transverse distribution beam 7 to adjust the elevation. The second steel pipe columns 41 are set to at least 8 and are evenly distributed on both sides of the lower steel box beam 3 to stably support the upper member 6.

[0054] like Figures 1 to 6 As shown, according to another aspect of the present application, a construction method of a bracket for constructing an upper component 6 by using a lower steel box beam 3 to bear the load is provided, comprising the following steps:

[0055] (1) Support foundation construction S1: Treat the foundation and pour a rectangular concrete foundation. If it is backfill soil or the original foundation pit backfill position, first use an excavator to remove the backfill soil and soft soil layer, and backfill and tamp it with building bricks and stones or 6% lime soil. After the foundation treatment is completed, pour a C25 concrete rectangular foundation. The support foundation 1 uses a concrete expansion foundation;

[0056] (2) The first steel tube support is erected S2. The length of the first steel tube column 21 is selected according to the elevation of the lower steel box girder 3. The adjacent first steel tube columns 21 are connected by horizontal bracing and diagonal bracing. The first steel tube support 2 is hoisted onto the support foundation 1 and welded. The columns are made of Ф325×8 steel tubes. The tops of the columns are welded and fixed to the steel tubes with stiffening ribs and pads to form a small support platform. The steel tube columns are connected by channel steel horizontal bracing and angle steel diagonal bracing (the angle steel diagonal bracing is arranged at intervals) to increase their stability. The horizontal bracing between the columns is made of 14b channel steel, and the diagonal bracing is still made of 14b channel steel, which is welded to the steel tube columns through connecting plates;

[0057] (3) The lower support of the cantilever arm is erected S3. The length of the lower support of the cantilever arm 9 is selected according to the elevation of the flange of the lower steel box girder 3. The lower support of the cantilever arm 9 is hoisted onto the support foundation 1 and welded;

[0058] (4) Construction of the lower steel box girder S4: hoist the lower steel box girder 3 to the upper end of the first steel pipe support 2 and the cantilever lower support 9, and complete the initial splicing of the lower steel box girder 3 and the welding of the segmented connecting plates. The lower steel box girder 3 can be used as a bearing structure, saving a large number of supports and Bailey supports.

[0059] (5) The second steel tube support is erected S5. The length of the second steel tube column 41 is selected according to the elevation of the upper structure 6. Adjacent second steel tube columns 41 are connected by horizontal bracing and diagonal bracing. The second steel tube columns 41 are hoisted onto the panel of the lower steel box girder 3 and welded.

[0060] (6) The cantilever upper support is erected S6. The length of the cantilever upper support 8 is selected according to the elevation of the upper structure 6. The cantilever upper support 8 is hoisted to the panel of the lower steel box beam 3 and welded. The longitudinal distribution beam 5 and the transverse distribution beam 7 are hoisted to the second steel pipe column 41 and the upper end of the cantilever upper support 8 in sequence. The longitudinal distribution beam 5 adopts double-jointed I56a I-beams, and the transverse distribution beam 7 adopts double-jointed I36b I-beams. A small steel pipe and a jack are set on the upper part of the transverse distribution beam 7 to adjust the elevation;

[0061] (7) Upper component construction S7: hoist the upper component 6 to the upper end of the transverse distribution beam 7 and the cantilever upper support 8.

[0062] like Figures 1 to 5 As shown, the construction of the lower support 9 of the cantilever arm includes:

[0063] (31) Making the steel pipe at the lower part of the boom;

[0064] (32) Weld the boom support at the upper end of the steel pipe at the lower part of the boom;

[0065] (33) The lower support 9 of the cantilever arm is hoisted onto the support foundation 1 and welded so that the lower support 9 of the cantilever arm is located at the flange position of the lower steel box girder 3.

[0066] like Figures 1 to 5 As shown, after the lower steel box girder 3 is hoisted, the first steel pipe column 21 corresponds to the web of the lower steel box girder 3 , and the cantilever lower support 9 corresponds to the flange of the lower steel box girder 3 .

[0067] like Figures 1 to 5 As shown, the construction of the upper support 8 of the cantilever arm includes:

[0068] (61) Making the upper steel pipe of the boom;

[0069] (62) Hoist the upper steel pipe of the cantilever arm onto the lower steel box girder 3 panel and weld it to make the upper steel pipe coaxial with the lower steel pipe.

[0070] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A support for constructing upper components by using the lower steel box beam as a load, characterized in that: include: A support foundation and a first steel pipe support arranged on the support foundation; wherein, The first steel pipe support is arranged below the lower steel box girder and is used to support the lower steel box girder; A second steel pipe support, wherein the second steel pipe support is arranged on the upper surface of the lower steel box beam, and the upper end of the second steel pipe support is used to support the upper structure; The first steel pipe support and the second steel pipe support are both arranged at the web position of the lower steel box girder; The support also includes a cantilever arm lower support arranged on the support foundation and a cantilever arm upper support arranged on the upper end of the lower steel box beam, wherein the cantilever arm lower support and the cantilever arm upper support are arranged coaxially, wherein the cantilever arm lower support is connected to the flange of the lower steel box beam, and the cantilever arm upper support is used to support the upper component; The cantilever arm lower support comprises a cantilever arm lower steel pipe and a cantilever arm support arranged at the upper end of the cantilever arm lower steel pipe, the cantilever arm support is arranged coaxially with the cantilever arm steel pipe, the cantilever arm support is connected to the flange of the lower steel box beam, and the lower end of the cantilever arm lower steel pipe is connected to the support foundation; The upper support of the cantilever arm includes an upper steel pipe of the cantilever arm, the lower end of the upper steel pipe of the cantilever arm is welded to the lower steel box beam panel, and the upper end is used to support the upper structure; The first steel pipe support includes a plurality of first steel pipe columns, which are distributed on both sides of the lower steel box girder and connected by flat braces and diagonal braces, the lower ends of the first steel pipe columns are welded to the support foundation, and the upper ends are connected to the web of the lower steel box girder; The second steel pipe support includes multiple second steel pipe columns, adjacent second steel pipe columns are connected by flat braces and diagonal braces, the lower ends of the second steel pipe columns are welded to the upper end surface of the lower steel box beam and are located at the web position, and a longitudinal distribution beam is arranged at the upper end, and a transverse distribution beam is arranged on the longitudinal distribution beam, and the upper end of the transverse distribution beam is used to support the upper components.

2. A construction method for a support for upper structure construction using a lower steel box beam as claimed in claim 1, characterized in that: The steps include: (1) Construction of support foundation: treat the foundation and pour concrete rectangular foundation; (2) The first steel tube support is erected. The length of the first steel tube column is selected according to the elevation of the lower steel box girder. Adjacent first steel tube columns are connected by horizontal bracing and diagonal bracing. The first steel tube support is hoisted onto the support foundation and welded; (3) Erection of the lower support of the cantilever arm. Select the length of the lower support of the cantilever arm according to the elevation of the flange of the lower steel box girder. Hoist the lower support of the cantilever arm onto the support foundation and weld it. (4) Construction of the lower steel box girder: hoist the lower steel box girder to the first steel pipe support and the upper end of the cantilever lower support, and complete the initial splicing of the lower steel box girder and the welding of the segmented connecting plates; (5) Erection of the second steel tube support. The length of the second steel tube column is selected according to the elevation of the upper structure. Adjacent second steel tube columns are connected by horizontal bracing and diagonal bracing. The second steel tube columns are hoisted onto the lower steel box girder panel and welded. (6) Erection of the upper support of the cantilever arm. Select the length of the upper support of the cantilever arm according to the elevation of the upper structure. Hoist the upper support of the cantilever arm to the lower steel box girder panel and weld it. Hoist the longitudinal distribution beam and the transverse distribution beam to the second steel pipe column and the upper end of the upper support of the cantilever arm in sequence. (7) Construction of upper components: hoist the upper components to the upper end of the transverse distribution beam and the cantilever upper support.

3. The construction method of the support for upper structure construction using the lower steel box beam as the support according to claim 2 is characterized in that: The lower support of the cantilever arm includes: (31) Making the lower steel pipe of the boom; (32) Weld the boom support at the upper end of the lower steel pipe of the boom; (33) Lift the lower support of the cantilever arm onto the support foundation and weld it so that the lower support of the cantilever arm is located at the flange position of the lower steel box girder.

4. The method for constructing a support for constructing upper components by using a lower steel box beam as a load according to claim 3, characterized in that: After the lower steel box girder is hoisted, the first steel pipe column corresponds to the web of the lower steel box girder, and the lower support of the cantilever arm corresponds to the flange of the lower steel box girder.

5. The method for constructing a support for constructing upper components by using a lower steel box beam as a load according to claim 4, characterized in that: The upper support of the cantilever arm includes: (61) Making the upper steel pipe of the boom; (62) Hoist the upper steel pipe of the cantilever arm onto the lower steel box girder panel and weld it to make the upper steel pipe coaxial with the lower steel pipe.

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