CN116043719A - A No. 0 Block Support System Combining Triangular Brackets and Floor Steel Pipes and Its Construction Method - Google Patents

Abstract

The invention discloses a 0 number block supporting system combined by a triangular bracket and a floor steel pipe and a construction method, wherein the 0 number block supporting system combined by the triangular bracket and the floor steel pipe is arranged on a pier foundation, the pier foundation comprises a bearing platform and pier columns fixedly arranged on the bearing platform, and the 0 number block supporting system combined by the triangular bracket and the floor steel pipe comprises: the support structure is arranged above the pier stud and used for supporting the template structure, and comprises a beam structure arranged above the pier stud and a triangular bracket fixedly arranged between the pier stud and the beam structure, and the triangular bracket is used for supporting the beam structure; the support structure comprises an upright post arranged between the bearing platform and the triangular bracket, and the upright post is suitable for supporting the triangular bracket so as to support the bearing structure. The invention can improve the supporting rigidity of the No. 0 block supporting system and simplify the working procedure of high-altitude operation.

Description

A No. 0 Block Support System Combining Triangular Brackets and Floor Steel Pipes and Its Construction Method

technical field

The invention relates to the technical field of continuous beam construction, in particular to a No. 0 block support system combined with a triangular bracket and a ground steel pipe and a construction method.

Background technique

At present, whether it is a high-speed railway or a highway, there are more and more continuous beam constructions, and the safety and stability of the No. 0 block support plays a decisive role in the continuous beam construction. At present, the support forms of No. 0 block are mostly full hall type and triangular bracket with pre-buried corbels in the pier body. Among them, the full hall type support is limited by the height of the pier and the bearing capacity of the foundation, which has high requirements on the foundation and is difficult to control stability, while the pier Although the triangular bracket with pre-embedded corbels has high rigidity, the high-altitude welding quality is not easy to control, and the removal period is long and the construction speed is slow.

Therefore, there is an urgent need to provide a No. 0 block support system and a construction method to improve the support stiffness of the No. 0 block support system and simplify the high-altitude operation process.

Contents of the invention

Therefore, the present invention aims to provide a No. 0 block support system and a construction method, so as to improve the support rigidity of the No. 0 block support system and simplify the high-altitude operation process.

Therefore, in the first aspect, the embodiment of the present invention provides a No. 0 block support system combining a triangular bracket and a floor-standing steel pipe. The No. 0 block support system combining a triangular bracket and a floor-standing steel pipe is installed on the pier foundation , the pier foundation includes a cap and a pier column fixedly arranged on the cap, and the No. 0 block support system combining the triangular bracket with the floor steel pipe includes:

The supporting structure is arranged above the pier column for supporting the formwork structure, the supporting structure includes a beam structure arranged above the pier column, and a triangular bracket fixedly arranged between the pier column and the beam structure, the The triangular bracket is used to support the beam structure;

The support structure includes a column arranged between the platform and the triangular bracket, and the column is suitable for supporting the triangular bracket to support the supporting structure.

Optionally, the triangular brackets are arranged in two rows, and the two rows of triangular brackets are arranged on the left and right sides of the pier column along the bridge direction, and the two rows of triangular brackets are respectively connected with the pier column to The piers are pulled in opposite directions.

Optionally, each row of triangular brackets includes a plurality of triangular brackets distributed at intervals along the bridge direction, and the support structure includes a plurality of columns corresponding to the plurality of triangular brackets, one end of the column It is fixedly arranged on the bearing platform, and the other end extends vertically upwards and is connected and fixed with the triangular bracket in one-to-one correspondence.

Optionally, the uprights are in two rows, and the two rows of uprights are arranged on both sides of the pier, and the supporting structure further includes:

Connecting rods, each row of uprights are connected through the connecting rods;

The supporting wall part, the column is connected with the pier column through the supporting wall part, the supporting wall part includes an additional rod and a pre-embedded board, the pre-embedded board is arranged in the pier column, and the additional rod One end is fixed to the column, and the other end is fixed to the embedded board.

Optionally, the support structure also includes:

The embedded part of the column foot is pre-embedded and arranged on the cap, the bottom end of the column is installed on the embedded part of the column foot, and the column is fixed on the platform through the embedded part of the column foot.

Optionally, the triangular bracket includes a bracket upper chord, a bracket vertical rod and a bracket oblique rod that are sequentially connected to form a triangular structure; one end of the bracket upper chord is fixed on the pier, and the other end is connected to the The upper end of the bracket diagonal bar is connected; the top end of the bracket vertical bar is connected with the upper chord of the bracket, and the bottom end is fixed on the column; the lower end of the bracket vertical bar is connected with the bracket vertical bar The lower connection is fixed.

Optionally, the upper chord of the bracket, the vertical rod of the bracket and the inclined rod of the bracket are respectively hinged through pin shafts.

Optionally, the beam structure includes a plurality of main beams arranged at intervals along the horizontal bridge direction and fixedly arranged on the triangular brackets, and a plurality of distribution beams arranged along the longitudinal bridge direction and fixed on the main beams.

Optionally, the supporting structure also includes:

The unloading device has a preset height of the support. The unloading device is supported between the triangular bracket and the main beam for supporting the main beam. During the construction process, the unloading device can be adjusted to The top height of the device is used to support the main beam or release the support.

In the second aspect, the embodiment of the present invention also provides a construction method for the No. 0 block support system that is applied to the combination of the triangular bracket and the floor steel pipe described in any one of the above embodiments. The construction method includes the following steps:

Install the embedded parts: Install the embedded parts of the column feet in the cap; pre-embed the wall parts at the preset height on the pier body, and reserve the pull-in holes;

Install the column: After the pier body is completed, install the steel pipe column to the preset elevation, and weld the parallel and diagonal braces to reinforce the column;

Install the triangular bracket: Install the triangular bracket on the pier body of the pier column, weld the triangular bracket and the upper horizontal plate of the column on both sides, and pull the upper chord of the bracket; Double-sided welding with the column and the horizontal plate on the column;

Installation of main beams and distribution beam trusses;

Installing the unloading device: According to the preset spacing, a plurality of unloading devices are arranged at transverse intervals on the upper chord of the bracket.

The technical solution of the present invention has the following advantages:

1. In the prior art, the support system of block 0 of the continuous beam supported by triangular brackets is usually fixed on the pier columns, and the triangular brackets are only supported by the pier columns, and the stability is poor; The No. 0 block support system in which the triangular bracket and the floor steel pipe are combined in the embodiment of the present invention adopts the combination of the triangular bracket and the upright column. The support shares part of the force of the triangular bracket acting on the pier column. It has the remarkable advantages of stable and reliable force, relatively small amount of material, small settlement, large bearing capacity of the support system, and controllable safety risks. It is especially suitable for 0# block project of continuous rigid frame bridge with pier height less than 40 meters.

For the span layout of the main bridge (80+152+80)m corrugated steel web prestressed concrete beam-arch composite system, the main beam cross-section of the beam structure adopts the whole single-box five-chamber box section, and the shape is complex and the exterior The outline is the pier column of the vase pier, and the overall height direction and internal cavity contract at an angle. Due to the complex structure and stress of the 0# block of the main pier, combined with the concentration of prestressed pipes on the roof of the box girder, dense steel bars, large concrete volume, large structural size, and small design size of the cap, the steel pipe column support system design is relatively relatively difficult, but in the embodiment of the present invention, a combination of triangular bracket and column is adopted, wherein the column can support the triangular bracket and share part of the force of the triangular bracket acting on the pier column, while the triangular bracket utilizes The principle of triangular stability can strengthen the stability between the pier column, column and beam structure, thereby improving the support stiffness of the No. 0 block support system, and at the same time facilitates disassembly and assembly, and simplifies the working process at heights.

2. In the embodiment of the present invention, the construction speed is fast, and the materials can be quickly assembled on site after arriving at the site. Compared with the traditional floor support and live scaffolding, the construction period is saved by about 1/5; steel pipe columns and trusses are standard parts, standardized High degree.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

Fig. 1 is the front view of No. 0 block support system that triangular bracket and floor steel pipe combine among the present invention;

Fig. 2 is the sectional view of A-A section among Fig. 1;

Fig. 3 is the sectional view of B-B section among Fig. 1;

Fig. 4 is a top view after installing the embedded part of the column foot on the platform;

Figure 5 is a top view after installing the main beam;

Fig. 6 is a top view after the distribution beam is installed on the main beam.

Explanation of reference signs:

100. Template structure;

1. Cap; 2. Pier column;

3. Beam structure; 31. Main beam; 32. Distribution beam;

4. Triangular bracket; 41. Bracket upper chord; 42. Bracket vertical bar; 43. Bracket oblique bar;

51. Upright column; 52. Connecting rod; 521. Flat joint; 522. Diagonal brace;

53. Supporting wall parts; 54. Embedded parts for column feet;

6. Unloading device.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, or in a specific orientation. construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as there is no conflict with each other.

As shown in Figures 1 to 6, the embodiment of the present invention provides a No. 0 block support system combining a triangular bracket and a floor steel pipe. The No. 0 block support system combining a triangular bracket and a floor steel pipe is installed on the pier foundation Above, the pier foundation includes the cap 1 and the pier column 2 fixedly arranged on the cap 1, and the No. 0 block support system combining the triangular bracket and the floor steel pipe includes a supporting structure and a supporting structure. Specifically, the pier column 2 is vertically arranged on the platform cap 1, and the supporting structure is arranged above the pier column 2 for supporting the formwork structure 100. The supporting structure includes a beam structure 3 arranged above the pier column 2, and a fixed arrangement The triangular bracket 4 between the pier column 2 and the beam structure 3 is used to support the beam structure 3 . The support structure includes a column 51 disposed between the platform 1 and the triangular bracket 4 , and the column 51 is suitable for supporting the triangular bracket 4 to support the supporting structure.

In the prior art, the support system of block No. 0 of the continuous beam supported by triangular brackets is usually fixed on the pier columns, and the triangular brackets are only supported by the pier columns, and the stability is relatively poor; while the implementation of the present invention In the example, the combination of the triangular bracket 4 and the column 51 is adopted. The column 51 bears part of the force of the triangular bracket 4. The column 51 can support the triangular bracket 4 and share the action of the triangular bracket 4 on the pier column 2. It has the advantages of stable and reliable force, relatively small amount of material, small settlement, large bearing capacity of the support system, and controllable safety risks. It is especially suitable for continuous rigid frame bridges with pier heights less than 40 meters. 0# block works.

For the span layout of the main bridge (80+152+80)m corrugated steel web prestressed concrete beam-arch combination system, the cross-section of the main beam of beam structure 3 adopts the whole single-box five-chamber box section, and the shape is complex, The outer contour is the pier column 2 of the vase pier, and the overall height direction and the inner cavity shrink at an angle. Due to the complex structure and stress of the 0# block of the main pier, and the concentration of prestressed pipes on the roof of the box girder, dense reinforcement, large concrete volume, and large structural size (14.4*27.1*7.5m), the design size of cap 1 is small ( 10.8*8.8*4m), it is relatively difficult to fully adopt the steel pipe column support system structure design, but in the embodiment of the present invention, the combination of the triangular bracket 4 and the floor steel pipe column 51 is adopted, wherein the column 51 can carry out the triangular bracket 4 The support shares the part of the force of the triangular bracket 4 acting on the pier column 2. At the same time, the triangular bracket 4 utilizes the principle of triangular stability to strengthen the stability between the pier column 2, the column 51 and the beam structure, and then It can improve the support rigidity of the continuous beam No. 0 block support system, and at the same time facilitate disassembly and assembly, and simplify the high-altitude operation process.

The main feature of the construction of the 0# beam section of this bridge is the high-altitude operation. The bracket composed of the supporting structure and the supporting structure as the main load-bearing component must meet the following conditions: ①The assembly must be simple and easy: because the construction is on the water, the construction platform is difficult to build. It is required that the assembly process of the bracket should not be too cumbersome and avoid more combination or assembly processes; Within the radius of gyration, the lifting capacity of the tower crane is limited, so it is required that the weight of each component of the bracket cannot exceed the limit of the lifting capacity of the tower crane; ③The bracket rigidity should be large: because the overall design of the bracket is simple, it is not suitable to use too many rods , In terms of load transmission, it should also be concise, most of which are concentrated loads. Therefore, the main stress-bearing members of the bracket are required to have large rigidity, and damage caused by local stress exceeding the standard cannot occur.

According to the construction characteristics of the above-mentioned high-altitude bracket, the key technical design of the support system is carried out in the following aspects: ①Structure selection of the main truss of the bracket: In order to facilitate assembly and simplify the high-altitude operation process, the stressed main truss is determined to be an integral type. The section steel is directly combined on the pin shaft to avoid too many assembled rods in the sky; ②The connection method of the main truss and the embedded parts: the main truss and the embedded parts of the pier body are hinged, and the precision-rolled rebar is used for tensioning , instead of using the common simple-supported beam connection, in order to improve the stability of the main truss itself, considering that the main truss can still produce a certain deflection and rotation when it is stressed, the calculation is modeled as a hinge; ③ is to control the weight of the bar , it is determined that the main truss member is composed of channel steel, which can effectively reduce the self-weight of the member while meeting the force requirements; Stiffeners.

The specific design of the support system in this embodiment is as follows:

The triangular brackets 4 are arranged in two rows, and the two rows of triangular brackets 4 are arranged on the left and right sides of the pier column 2 along the bridge direction. The two rows of triangular brackets 4 are respectively connected with the pier column 2 to pull the pier column 2 . Each row of triangular brackets 4 includes a plurality of triangular brackets 4 distributed at intervals along the bridge direction, and the support structure includes a plurality of columns 51 corresponding to the plurality of triangular brackets 4, and one end of the column 51 is fixed on the platform. 1, the other end extends vertically upwards and is connected and fixed with the tripod bracket 4. The triangular bracket 4 comprises a bracket upper chord 41, a bracket vertical bar 42 and a bracket oblique bar 43 connected successively to form a triangular structure; The upper end link of 43; The top of bracket vertical bar 42 is connected with bracket upper chord bar 41, and the bottom end is installed and fixed on the column 51; Optionally, the bracket upper chord 41, the bracket vertical bar 42 and the bracket oblique bar 43 are respectively hinged through pin shafts, wherein the bracket upper chord 41 adopts a double I63 I-beam, and the bracket oblique bar 43 It is connected with the bracket vertical bar 42 through a pin shaft, and is pulled oppositely at the pier body of the pier column 2 .

Under the action of the upper load on the triangular bracket 4, problems are prone to occur at the weld of the triangular bracket 4 and the column 51, such as the cracking of the weld seam caused by the action of the upper load, the inclination of the triangular bracket 4, etc., even causing the triangular bracket 4 and the The joint of the column 51 breaks directly, causing the triangular bracket 4 to fall, resulting in a construction accident. In this embodiment, the upper chord 41 of the bracket connected to the pier column 2 is pulled and fixed, so that the triangular bracket 4 and the column 51 can be strengthened. Connection stability between piers 2.

Optionally, the bracket vertical bar 42 adopts a pair of No. 45 channel steel or No. 40 channel steel, and is connected with the bracket oblique bar 43 and the bracket upper chord 41 through a pin; the bracket oblique bar 43 adopts a double-assembled No. 45 groove Steel or No. 40 channel steel is connected with the bracket vertical bar 42 and the bracket upper chord 41 by a pin shaft.

The column 51 adopts φ630×10mm steel pipe, and both the column head and the column foot are strengthened. There are two rows of columns 51, and the two rows of columns 51 are arranged on both sides of the pier 2. The supporting structure also includes connecting rods 52 and buttresses 53, and each row of columns 51 is connected by connecting rods 52; The column 2 is connected, and the buttress 53 includes an additional rod and a pre-embedded plate, the pre-embedded plate is arranged in the pier column 2, one end of the additional rod is fixedly connected with the column 51, and the other end is fixedly connected with the pre-embedded plate. Optionally, the support structure also includes a pre-embedded column foot 54 arranged on the platform 1, the bottom end of the column 51 is installed on the column foot embedded part 54, and the column 51 is installed and fixed through the column foot embedded part 54 On platform 1. The connecting rod 52 includes a parallel link 521 and a diagonal brace 522 arranged on the column 51 . The installation stability of the column 51 can be improved, and the overall stability and safety of the supporting structure can be improved by arranging the connecting rod 52 , the buttress piece 53 and the embedded piece 54 of the column foot.

The beam structure 3 includes a plurality of main beams 31 distributed at intervals along the horizontal bridge direction and fixedly arranged on the triangular bracket 4, and a plurality of distribution beams 32 arranged along the longitudinal bridge direction and fixed on the main beams 31, wherein the main beams 31 is a load-bearing beam, which adopts I56a I-beam; distribution beam 32 is a truss structure, which adopts No. 14 channel steel assembly and welding.

The supporting structure also includes a unloading device 6 arranged between the triangular bracket 4 and the main beam 31. The unloading device 6 has a preset abutment height and is used to support the main beam 31. During the construction process, through Adjust the top height of the unloading device 6 to support the main beam 31 or release the support. By adjusting the height of the unloading device 6, the abutment top of the unloading device 6 is in contact with the main beam 31 to support the main beam 31; support. Exemplarily, the unloading device 6 can adopt a shaped sand bucket, the height is determined by calculation, and the specific height is fine-tuned according to the site conditions. Or, the unloading device 6 can also adopt a jack.

In the present embodiment, the 0# beam section formwork structure 100 adopts the finished shaped steel mold, which can be provided by the manufacturer; under the formwork structure 100, No. 14 channel steel is welded to form the truss distribution beam 32, and the distance between the distribution beam 32 and the solid section of the web is 25cm, The remaining positions are 75cm; under the distribution beam 32 is the I56a I-beam cross bridge to the main beam 31 as the load-bearing beam, the distance between the load-bearing beams of the pier column 2 is 190cm, and the finished triangle bracket 4 arranged on the outside of the pier column 2 is placed under the load-bearing beam. Brackets 4 and trusses are arranged in five brackets along the direction of the bridge, the layout spacing: (4+2×2+4) m, and the height of each bracket is 4 m; the unloading device 6 is placed between the load-bearing beam and the triangular bracket 4 for adjustment; The lower part of the triangular bracket 4 and the outer side of the pier column 2 are supported by a column 51 of a φ630×10mm steel pipe. The triangular bracket 4 is formed by being connected by an I-beam pin. The flange position is supported by finished trusses.

The embodiment of the present invention also provides a construction method of the No. 0 block support system in which the triangular bracket and the floor steel pipe are combined. First, in the design stage, the size of the pile foundation and the cap 1 is designed according to the size of the No. 0 block; according to the construction requirements Design the support structure and supporting structure, as well as the overall support system; check the design according to the force, strength, stiffness and stability of the components. The specific construction and installation steps are as follows:

①Installation of embedded parts: during the construction of cap 1, install the embedded parts 54 of column feet according to the design drawings; To pull the channel.

② Install column 51: After the pier body is completed, install steel column column 51 to the design elevation, and weld flat joint 521 and diagonal brace 522 to reinforce column 51.

③Installation of triangular brackets 4: each triangular bracket 4 is processed by the factory and transported to the construction site, and assembled on site and then hoisted in place by a tower crane; Frame 4 is welded on both sides of the horizontal plate on the steel pipe column 51 and pulls the bracket upper chord 41;

④ Install the main beam 31 and the distribution beam 32 truss: install the main beam 31 and the distribution beam 32 on the upper chord 41 of the bracket according to the designed spacing. Specifically, the main beam 31 and the distribution beam 32 are hoisted in place in the order of first the middle and then the two sides. During hoisting, two hoisting points must be set and distributed equidistantly to keep the balance of the I-beam during the hoisting process to avoid distortion during the hoisting process. stress.

⑤Installing the unloading device 6: According to the preset distance, a plurality of unloading devices 6 are arranged at intervals along the transverse direction on the upper chord 41 of the bracket.

⑥ Border protection construction: the upper part of the bracket is built with Φ48×3.0mm steel pipes, the height of the outer railing is at least 120cm, and a horizontal bar is installed every 60cm in the vertical direction, and scissors are set to ensure the integrity of the railing. Stability, at the same time, the inside of the pole is provided with a foot guard of no less than 18cm, and the entire railing facade is protected by a protective net.

In the embodiment of the present invention, a No. 0 block support system and construction method combining triangular brackets and floor steel pipes has the remarkable advantages of stable and reliable force, relatively small amount of materials, small settlement, and controllable safety risks. It is especially suitable for the 0# block project of the continuous rigid frame bridge with pier height less than 40 meters. In addition, the supporting system has a huge bearing capacity, which can carry 1578m ³ of concrete, equivalent to a weight of 3945t; the construction speed is fast, and the materials can be quickly assembled on site after arriving at the site. 5. Both the steel pipe column 51 and the truss are standard parts, with a high degree of standardization.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. However, the obvious changes or changes derived therefrom still fall within the scope of protection of the present invention.

Claims (10)

1. A No. 0 block support system combining a triangular bracket and a floor steel pipe, installed on a pier foundation, the pier foundation includes a cap (1) and a pier column (2) fixedly arranged on the cap (1) ), it is characterized in that, described No. 0 block supporting system comprises: The supporting structure is arranged above the pier column (2) for supporting the formwork structure (100), and the supporting structure includes a beam structure (3) arranged above the pier column (2), and a beam structure (3) fixedly arranged on the pier A triangular bracket (4) between the column (2) and the beam structure (3), the triangular bracket (4) is used to support the beam structure (3); The support structure includes a column (51) arranged between the platform (1) and the triangular bracket (4), and the column (51) is suitable for supporting the triangular bracket (4) to realize Support for the supporting structure. 2. the No. 0 block supporting system that triangular bracket and floor steel pipe according to claim 1 combine, it is characterized in that, described triangular bracket (4) is set to two rows, and described triangular bracket (4) of two rows ) are arranged on the left and right sides of the pier column (2) along the bridge direction, and two rows of triangular brackets (4) are respectively connected with the pier column (2) to pull the pier column (2). 3. The No. 0 block support system in which triangular brackets and floor-standing steel pipes are combined according to claim 2 is characterized in that, each row of triangular brackets (4) includes a plurality of triangular brackets distributed at intervals along the bridge direction (4), the support structure includes a plurality of uprights (51) corresponding to the plurality of triangular brackets (4), one end of the uprights (51) is fixedly arranged on the platform (1), The other end extends vertically upwards and is connected and fixed with the tripod bracket (4). 4. The No. 0 block support system combining the triangular bracket and the floor steel pipe according to claim 3, characterized in that, the uprights (51) are two rows, and the two rows of uprights (51) are arranged on the pier columns (2 ), the support structure also includes: Connecting rod (52), every row of uprights (51) is connected by described connecting rod (52); A buttress (53), the column (51) is connected to the pier column (2) through the buttress (53), the buttress (53) includes an additional rod and a pre-embedded board, the The embedded plate is arranged in the pier column (2), and one end of the additional rod is fixedly connected with the column (51), and the other end is fixedly connected with the embedded plate. 5. The No. 0 block support system combining a triangular bracket and a floor-standing steel pipe according to claim 4, wherein the support structure further comprises: The embedded part (54) of the column foot is pre-embedded and arranged on the platform (1), the bottom end of the column (51) is installed on the embedded part (54) of the column foot, and the column (51) ) is installed and fixed on the bearing platform (1) through the column foot embedded part (54). 6. The No. 0 block support system according to any one of claims 3-5, wherein the triangular bracket is combined with a floor-standing steel pipe, wherein the triangular bracket (4) includes brackets that are sequentially connected to form a triangular structure chord (41), bracket vertical bar (42) and bracket oblique bar (43) on the frame; One end of the bracket upper chord (41) is installed and fixed on the pier column (2), and the other end is connected with the upper end of the bracket oblique bar (43); the top of the bracket vertical bar (42) is connected with the The upper chord (41) of the bracket is connected, and the bottom end is installed and fixed on the column (51); the lower end of the bracket oblique bar (43) is connected and fixed with the lower end of the bracket vertical bar (42). 7. The No. 0 block support system combining a triangular bracket and a floor-standing steel pipe according to claim 6, characterized in that, the bracket upper chord (41), bracket vertical bar (42) and bracket oblique bar (43) are respectively hinged by bearing pins. 8. The No. 0 block support system in which triangular brackets and floor steel pipes are combined according to claim 1, characterized in that, the beam structure (3) includes spaced distribution along the transverse bridge and is fixedly arranged on the triangular brackets ( 4) a plurality of main cross beams (31), and a plurality of distribution beams (32) arranged along the longitudinal bridge direction and fixed on the main cross beams (31). 9. The No. 0 block support system combining a triangular bracket and a floor-standing steel pipe according to claim 8, wherein the supporting structure further comprises: The unloading device (6) has a preset abutment height, and the unloading device (6) is supported and arranged between the triangular bracket (4) and the main beam (31) for supporting the main beam (31) support, in the construction process, by adjusting the height of the top of the unloading device (6) to support the main beam (31) or release the support. 10. A construction method for the No. 0 block support system applied to the triangle bracket described in any one of claims 1-9 and the floor steel pipe, characterized in that the construction method comprises the following steps: Install the embedded parts: install the column base embedded parts (54) in the cap (1); perform pre-embedded installation of the supporting wall parts (53) at the preset height position on the pier body, and reserve a pair of pulling holes; Install the column (51): after the pier body is completed, install the steel pipe column (51) to the preset elevation, and weld the connecting rod (52) to reinforce the column (51); Install the triangular bracket (4): Install the triangular bracket (4) on the pier body of the pier column (2), weld the triangular bracket (4) and the upper horizontal plate of the column (51) on both sides, and wind the bracket The rod (41) is pulled in opposite directions; the bracket upper chord (41), the bracket oblique rod (43) and the column (51) and the upper horizontal plate of the column (51) are double-sidedly welded; Main beam (31) and distribution beam (32) trusses are installed; Install the unloading device (6): according to the preset spacing, a plurality of unloading devices (6) are arranged at transverse intervals on the bracket upper chord (41).

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