Coastal silt geology boiler steel frame partition construction method

Abstract

The present application relates to the technical field of building engineering, and discloses a coastal silt geological boiler steel frame partition construction method, which comprises the following steps: S1, steel frame partition is divided according to raft foundation; S2, partition installation and real-time monitoring; S3, data processing and parameter calculation; S4, installation adjustment and deviation correction; and S5, geological solidification treatment. According to the targeted partition design of the partition raft foundation and the geological stability requirement, the present application realizes the parallel construction mode of steel frame installation and civil pile foundation and peripheral equipment foundation, solves the core problem that the boiler hoisting construction arrangement under silt geology is restricted by pile foundation, and innovatively proposes the counter-pressure heaped load and the preset column deviation quantitative empirical formula, so that the offset, settlement and post-loaded structure variation caused by unit load can be accurately calculated, the accurate quantification of the preset deviation of the correction load and the elevation is realized, the overall dimensional deviation after the installation of all partitions is ensured to strictly meet the industry standard, and the quality hidden dangers such as foundation deviation and uneven settlement caused by the fluidity of silt layer are solved.

Description

Technical Field

[0001] This invention relates to the field of building engineering technology, specifically to a method for zoned construction of a boiler steel frame in coastal silt geology. Background Technology

[0002] my country's coastal areas (such as the Yangtze River Delta, Pearl River Delta, and estuary delta) are widely covered with silt and silty soil layers that have high natural water content (60%-90%), large porosity (e>1.5), high compressibility (a1-2=1.5-2.3 / MPa), and low shear strength (Su=5-10kPa). These soils are in a fluid plastic state with extremely poor permeability (k≈10-8cm / s) and significant thixotropy and rheology, making them typical unsuitable foundations for engineering construction.

[0003] Boiler steel frames, as the core load-bearing structure of thermal power plants and industrial boilers, are characterized by their large size, heavy weight, and high installation precision requirements (the deviation of column center and elevation difference must be controlled within millimeters). When constructing boiler steel frames in coastal silty geological conditions, traditional techniques face many intractable challenges:

[0004] Poor geological stability leads to high construction risks: the silt layer has insufficient bearing capacity, and the steel frame is prone to uneven settlement of the foundation and lateral extrusion during installation, which can cause the columns to tilt, the beams to twist, and even the foundation to shift due to the extrusion of the pile foundation. Traditional overall hoisting or simple segmented construction cannot form an immediate stable frame, which can easily lead to structural instability.

[0005] The existing zoning construction lacks targeted design: the conventional boiler steel frame layer-by-layer and segment-by-segment hoisting method does not take into account the rheological characteristics of silt geology, the zoning is based only on structural dimensions, without taking into account the stress characteristics of raft foundation and geological stability requirements, the installation sequence is chaotic, it is impossible to form a staged stable unit through zoning, and the coordination with civil engineering pile foundation and raft foundation construction is poor, which limits the optimization of the construction period.

[0006] Insufficient precision in correction and elevation control: Existing pile foundation correction in soft soil areas mostly adopts extensive methods such as excavator pulling and jack pushing. Inaccurate reaction force control can easily cause secondary damage to the pile body or overcorrection. In addition, there is a lack of precise correction load calculation models for silty geology. At the same time, traditional installation does not consider the impact of subsequent settlement and rebound, and there is no scientific method for calculating the pre-set elevation deviation, resulting in the steel frame exceeding the accuracy standard after completion.

[0007] Poor coordination between geological treatment and construction: Traditional soft soil treatment often adopts replacement or vacuum preloading methods. Replacement is costly and generates a lot of construction waste, while vacuum preloading has a long construction period (requiring several months). Neither method is coordinated with the steel frame installation process, and it is impossible to eliminate the laminar flow dynamics of silt caused by construction disturbance in real time, making it difficult to control foundation deformation from the root.

[0008] Therefore, we propose a zoned construction method for boiler steel frames in coastal silt geology. Summary of the Invention

[0009] The purpose of this invention is to provide a method for the zonal construction of boiler steel frames in coastal silt geology, thereby solving or at least alleviating one or more of the above-mentioned problems and other problems existing in the prior art.

[0010] To achieve the above objectives, the present invention provides the following technical solution: a method for zoned construction of a boiler steel frame in coastal silt geology, comprising the following steps:

[0011] S1. Divide the steel frame into zones according to the raft foundation: Divide the steel frame into multiple independent stable zones, including the initial stable frame zone and the subsequent sequential installation zone;

[0012] S2. Zonal installation and real-time monitoring: Starting from the initial stable frame area, steel frames are installed layer by layer in a preset order. At the same time, the construction of civil engineering pile foundations and raft foundations are carried out in parallel, and the settlement, horizontal offset and torsion value of columns and beams in the installed area are monitored simultaneously.

[0013] S3. Data Processing and Parameter Calculation: Based on monitoring data, the average settlement, rebound, and load required for foundation offset correction are calculated through a data analysis system.

[0014] S4. Installation, Adjustment and Correction: Adjust the preset deviation value of the column elevation according to the calculation results, calibrate the column installation accuracy through anchor bolts, and correct the foundation offset by surcharge counter-pressure.

[0015] S5. Geological solidification treatment: A mixing head is used to mix and solidify the solidifying agent with the silt layer around the boiler foundation, eliminating the internal flow dynamics of the silt to stabilize the geological structure.

[0016] In a method for zoned construction of a boiler steel frame in coastal silt geology according to the present invention, optionally, in step S1, the steel frame is divided into a first zone, a second zone, a third zone, a fourth zone, and a fifth zone:

[0017] The coordinates of the first region division are: (K3, 4), (K3, 5), (K5, 4), (K5, 5);

[0018] The coordinates for the second region division are: (K3, 1), (K3, 2), (K5, 1), (K5, 2);

[0019] The coordinates for the third region are: (K1, 4), (K1, 5), (K2, 4), (K2, 5);

[0020] The coordinates for the fourth region are: (K1, 1), (K1, 2), (K2, 1), (K2, 2);

[0021] The coordinates of the fifth region are: (K0, 1), (K0, 5), (K1, 5), (K1, 1);

[0022] The initial stabilization frame areas are (K3, 4), (K3, 5), (K5, 4), and (K5, 5). The installation sequence is clockwise. After all areas are installed, the main beams between each area are connected.

[0023] In a method for zoned construction of a boiler steel frame in coastal silt geology according to the present invention, optionally, in step S3, the data analysis system calculates the preset deviation value using an empirical formula for the preset installation deviation of the steel column elevation, wherein the formula is:

[0024]

[0025] This refers to the counter-pressure reactor load, expressed in kg.

[0026] This is the adjustment coefficient for the counter-pressure load distance, which is proportional to the sum of the squares of the horizontal and vertical distances from the counter-pressure load to the offset foundation, i.e. , Adjustment coefficient, Horizontal distance Vertical distance;

[0027] The expected offset shift amount is expressed in mm.

[0028] The expected migration time is in days.

[0029] The projected area of ​​the counter-pressure load;

[0030] Cumulative offset, in mm;

[0031] Mass of the foundation and installed equipment, in kg;

[0032] Cumulative offset time, in days;

[0033] Projected area of ​​the foundation and installed equipment.

[0034] In a method for zoned construction of a boiler steel frame in coastal silt geology according to the present invention, optionally, in step S3, the data analysis system calculates the preset deviation value using an empirical formula for the preset installation deviation of the steel column elevation, wherein the formula is:

[0035]

[0036] in, This is the reference elevation of the steel column, in meters (m).

[0037] This is the elevation of the installed steel columns after settlement, in meters.

[0038] The elevation is the pre-set installation deviation margin for the planned steel columns, in meters;

[0039] Pre-set installation tolerance for planned steel columns, in meters (m).

[0040] The estimated settlement rebound of the installed steel column (m);

[0041] The mass of the installed equipment is expressed in kg.

[0042] The mass of the equipment to be installed is expressed in kg.

[0043] In a zonal construction method for a boiler steel frame in coastal silt geology according to the present invention, optionally, when multiple installed steel columns exist...

[0044]

[0045] This represents the number of steel columns that have been installed.

[0046] Let K be the mass of the equipment corresponding to the i-th installed steel column, in kg.

[0047] In a zonal construction method for a boiler steel frame in coastal silt geology according to the present invention, optionally, in step S3, the data analysis system can calculate the offset, settlement rebound, correction load and expected correction time of the raft foundation counter-pressure load in each area.

[0048] Calculate the preset installation deviation value of the column;

[0049] The least squares method is used to fit the offset trend curve and settlement trend curve of the column foundation, and the change value of foundation settlement caused by unit load is output.

[0050] In a zonal construction method for a boiler steel frame in coastal silt geology according to the present invention, optionally, in step S4, the specific method of the surcharge counter-pressure correction is as follows: in the area opposite to the foundation offset, the surcharge position and load size are determined according to the offset trend value output by the data analysis system, and the bias pressure is applied by the surcharge block to eliminate the foundation offset caused by the extrusion during pile foundation construction.

[0051] In a method for zonal construction of a boiler steel frame in coastal silt geology according to the present invention, optionally, in step S5, the curing agent consists of the following components in parts by weight: 6 parts cement, nanoparticles with a particle size of 500 nm. 3 portions of nanoparticles with a particle size of 400nm 2 parts, polyvinyl alcohol fiber 0.2 parts.

[0052] In a method for zoned construction of a boiler steel frame in coastal silt geology according to the present invention, optionally, in step S2, the real-time monitoring adopts a multi-angle measurement method, including:

[0053] The boiler centerline is fitted using professional measurement data and used as the installation reference.

[0054] The boiler baseline is verified by measuring professional data, and the deviation between the overall axis of the boiler and the plant's measurement system is adjusted.

[0055] In the coastal silt geological boiler steel frame zoning construction method according to the present invention, optionally, after the steel frame is installed, the overall technical indicators meet the following requirements:

[0056] Plate beam deflection ≤3mm;

[0057] Maximum deviation of column center ≤3mm;

[0058] The maximum deviation of longitudinal length is ≤5mm, and the maximum deviation of transverse length is ≤2mm;

[0059] The elevation difference between adjacent columns is ≤3mm, and the maximum elevation deviation of columns is ≤2mm;

[0060] The maximum diagonal difference is ≤5mm.

[0061] Compared with the prior art, the beneficial effects of the present invention are:

[0062] This invention innovatively achieves a parallel construction mode of steel frame installation, civil engineering pile foundation, and surrounding equipment foundation by designing raft foundations according to zoned zoning requirements and geological stability needs. It breaks the traditional process barrier of civil engineering first and then installation, greatly optimizes the construction rhythm, and solves the core problem of boiler hoisting construction arrangement being constrained by pile foundation in silty geology.

[0063] An innovative empirical formula for quantifying the deviation of counter-pressure surcharge and pre-erected columns is proposed, which can accurately calculate the offset, settlement and subsequent structural changes caused by unit load. This achieves precise quantification of the deviation between the correction load and the pre-set elevation, ensuring that the overall dimensional deviation after installation of all zones strictly meets industry standards. It solves the quality problems such as foundation offset and uneven settlement caused by the fluidity of the silt layer, and achieves millimeter-level precision control.

[0064] A multi-angle measurement technique, combining professional installation data to fit the centerline and professional measurement data to verify the baseline, is employed to construct a dual-benchmark assurance mechanism. This not only accurately fits the actual boiler centerline, ensuring the reliability of the steel frame installation benchmark, but also provides precise data for subsequent pipeline system layout by adjusting the deviation between the overall axis and the plant's measurement system. This achieves full-process quality control from steel frame installation to the construction of supporting systems, significantly improving the overall reliability and seamless integration of the project. Attached Figure Description

[0065] Figure 1 This is a zoning diagram of the first-floor steel frame of a gas-fired boiler in a zoning construction method for boilers in coastal silt geology, as described in this invention. Detailed Implementation

[0066] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0067] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0068] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as up, down, left, right, inside, outside, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0069] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connection" or similar designations indicating the connection relationship between components should be interpreted broadly. For example, they may refer to a fixed connection, a detachable connection, or an integral part; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0070] Example 1

[0071] Please see Figure 1This invention provides a technical solution: a method for zoned construction of a boiler steel frame in coastal silt geology, comprising the following steps:

[0072] S1. Divide the steel frame into zones according to the raft foundation: Based on the "Code for Design of Steel Structures of Boilers" GB / T22395-2022, and combined with the distribution of boiler steel frame columns and beams and the raft foundation structure, the steel frame is divided into multiple independent stable zones, including the initial stable frame zone and the subsequent sequential installation zone.

[0073] In this embodiment, the steel frame is divided into a first region, a second region, a third region, a fourth region, and a fifth region:

[0074] The coordinates of the first region division are: (K3, 4), (K3, 5), (K5, 4), (K5, 5);

[0075] The coordinates for the second region division are: (K3, 1), (K3, 2), (K5, 1), (K5, 2);

[0076] The coordinates for the third region are: (K1, 4), (K1, 5), (K2, 4), (K2, 5);

[0077] The coordinates for the fourth region are: (K1, 1), (K1, 2), (K2, 1), (K2, 2);

[0078] The coordinates of the fifth region are: (K0, 1), (K0, 5), (K1, 5), (K1, 1);

[0079] The initial stable frame areas are (K3, 4), (K3, 5), (K5, 4), and (K5, 5). The installation sequence is clockwise. After all areas are installed, the main beams between each area are connected. Then, the upper steel frame is installed layer by layer until the entire steel structure construction is completed.

[0080] S2. Zonal Installation and Real-time Monitoring: Starting from the initial stable frame area, steel frames are installed layer by layer in a preset order. At the same time, civil engineering pile foundation construction and raft foundation construction are carried out in parallel to optimize the critical path schedule and monitor the settlement, horizontal offset and torsion value of columns and beams in the installed area simultaneously.

[0081] The real-time monitoring employs a multi-angle measurement method, including:

[0082] The boiler centerline is fitted using professional measurement data and used as the installation reference.

[0083] The boiler baseline is verified by measuring professional data, and the deviation between the overall boiler axis and the plant's measurement system is adjusted.

[0084] S3. Data Processing and Parameter Calculation: Based on monitoring data, the average settlement, rebound, and load required for foundation offset correction are calculated through a data analysis system.

[0085] Due to the high fluidity and compressibility of the silt beneath the foundation, the self-weight of the steel frame equipment installed in the first area and the subsequent construction of the civil engineering pile foundation and raft foundation will have a certain impact on the installed area. The main impacts are the horizontal offset, torsion, and vertical settlement (or lifting) and overturning of the foundation in the installed area. Therefore, accurately measuring and processing the offset, torsion, and settlement data of the steel frame and foundation, and controlling the accuracy of the installation are the key points of the zoning construction.

[0086] Based on observational data, an empirical formula for foundation offset surcharge counterpressure is proposed when the silt distribution around the construction site is basically uniform and without significant differences, to correct foundation offset:

[0087] The formula is:

[0088]

[0089] This refers to the counter-pressure reactor load, expressed in kg.

[0090] This is the adjustment coefficient for the counter-pressure load distance, which is proportional to the sum of the squares of the horizontal and vertical distances from the counter-pressure load to the offset foundation, i.e. , Adjustment coefficient, Horizontal distance Vertical distance;

[0091] The expected offset shift amount is expressed in mm.

[0092] The expected migration time is in days.

[0093] The projected area of ​​the counter-pressure load;

[0094] Cumulative offset, in mm;

[0095] Mass of the foundation and installed equipment, in kg;

[0096] Cumulative offset time, in days;

[0097] Projected area of ​​the foundation and installed equipment.

[0098] At the same time, an empirical formula for the preset installation deviation of steel column elevation is proposed when the distribution of silt around the construction site is basically uniform and there is no significant difference:

[0099]

[0100] in, This is the reference elevation of the steel column, in meters (m).

[0101] This is the elevation of the installed steel columns after settlement, in meters.

[0102] The elevation is the pre-set installation deviation margin for the planned steel columns, in meters;

[0103] Pre-set installation tolerance for planned steel columns, in meters (m).

[0104] The estimated settlement rebound of the installed steel column (m);

[0105] The mass of the installed equipment is expressed in kg.

[0106] The weight of the equipment to be installed is expressed in kg.

[0107] When multiple steel columns are already in place, the pre-set installation deviation margin is taken as the average of the expected settlement rebound of the multiple installed steel columns, that is, at least the following conditions must be met:

[0108]

[0109] This represents the number of steel columns that have been installed.

[0110] Let K be the mass of the equipment corresponding to the i-th installed steel column, in kg.

[0111] Meanwhile, the data analysis system uses the least squares method to fit the offset trend curves and settlement trend curves of each column foundation in different directions, outputs the change value of foundation settlement caused by unit load, and outputs information on offset and settlement exceeding the standard.

[0112] Based on the empirical formulas, the offset and settlement rebound of the raft foundation counter-pressure load, the correction load and the expected correction time for each area are calculated; the preset installation deviation of the columns is calculated, so as to carry out the adjustment of the column reference elevation and longitudinal and transverse center lines, so that the final installation elevation and center line deviation of each zone meet the requirements of national industry standards.

[0113] S4. Installation, Adjustment and Correction: Adjust the preset deviation value of the column elevation according to the calculation results, calibrate the column installation accuracy through anchor bolts, and correct the foundation offset by surcharge counter-pressure.

[0114] S5. Geological solidification treatment: A mixing head is used to mix and solidify the solidifying agent with the silt layer around the boiler foundation, eliminating the internal flow force of the silt to stabilize the geological structure and avoid uneven settlement after the boiler equipment is installed.

[0115] The curing agent is composed of the following components in parts by weight: 6 parts cement, 3 parts nanoparticles with a particle size of 500nm, 2 parts nanoparticles with a particle size of 400nm, and 0.2 parts polyvinyl alcohol fiber.

[0116] The steel frame, after installation, meets the following overall technical specifications:

[0117] Plate beam deflection ≤3mm;

[0118] Maximum deviation of column center ≤3mm;

[0119] The maximum deviation of longitudinal length is ≤5mm, and the maximum deviation of transverse length is ≤2mm;

[0120] The elevation difference between adjacent columns is ≤3mm, and the maximum elevation deviation of columns is ≤2mm;

[0121] The maximum diagonal difference is ≤5mm.

[0122] All parts not described in this invention are the same as or can be implemented using existing technology. Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for zoned construction of a boiler steel frame in coastal silt geology, characterized in that, Includes the following steps: S1. Divide the steel frame into zones according to the raft foundation: Divide the steel frame into multiple independent stable zones, including the initial stable frame zone and the subsequent sequential installation zone; S2. Zonal installation and real-time monitoring: Starting from the initial stable frame area, steel frames are installed layer by layer in a preset order. At the same time, the construction of civil engineering pile foundations and raft foundations are carried out in parallel, and the settlement, horizontal offset and torsion value of columns and beams in the installed area are monitored simultaneously. S3. Data Processing and Parameter Calculation: Based on monitoring data, the average settlement, rebound, and load required for foundation offset correction are calculated through a data analysis system. S4. Installation, Adjustment and Correction: Adjust the preset deviation value of the column elevation according to the calculation results, calibrate the column installation accuracy through anchor bolts, and correct the foundation offset by surcharge counter-pressure. S5. Geological solidification treatment: A mixing head is used to mix and solidify the solidifying agent with the silt layer around the boiler foundation, eliminating the internal flow dynamics of the silt to stabilize the geological structure.

2. The method for zoned construction of boiler steel frame in coastal silt geology according to claim 1, characterized in that, In step S1, the steel frame is divided into a first region, a second region, a third region, a fourth region, and a fifth region: The coordinates of the first region division are: (K3, 4), (K3, 5), (K5, 4), (K5, 5); The coordinates for the second region division are: (K3, 1), (K3, 2), (K5, 1), (K5, 2); The coordinates for the third region are: (K1, 4), (K1, 5), (K2, 4), (K2, 5); The coordinates for the fourth region are: (K1, 1), (K1, 2), (K2, 1), (K2, 2); The coordinates of the fifth region are: (K0, 1), (K0, 5), (K1, 5), (K1, 1); The initial stabilization frame areas are (K3, 4), (K3, 5), (K5, 4), and (K5, 5). The installation sequence is clockwise. After all areas are installed, the main beams between each area are connected.

3. The method for zoned construction of boiler steel frames in coastal silt geological formations according to claim 1, characterized in that, In step S3, the data analysis system calculates the preset deviation value using an empirical formula for the preset installation deviation of the steel column elevation. The formula is: ； This refers to the counter-pressure reactor load, expressed in kg. This is the adjustment coefficient for the counter-pressure load distance, which is proportional to the sum of the squares of the horizontal and vertical distances from the counter-pressure load to the offset foundation, i.e. , Adjustment coefficient, Horizontal distance Vertical distance; The expected offset shift amount is expressed in mm. The expected migration time is in days. The projected area of ​​the counter-pressure load; Cumulative offset, in mm; Mass of the foundation and installed equipment, in kg; Cumulative offset time, in days; Projected area of ​​the foundation and installed equipment.

4. The method for zoned construction of boiler steel frame in coastal silt geology according to claim 1, characterized in that, In step S3, the data analysis system calculates the preset deviation value using an empirical formula for the preset installation deviation of the steel column elevation. The formula is: ； in, This is the reference elevation of the steel column, in meters (m). This is the elevation of the installed steel columns after settlement, in meters. The elevation is the pre-set installation deviation margin for the planned steel columns, in meters; Pre-set installation tolerance for planned steel columns, in meters (m). The estimated settlement rebound of the installed steel column (m); The mass of the installed equipment is expressed in kg. The mass of the equipment to be installed is expressed in kg.

5. The method for zoned construction of boiler steel frames in coastal silt geological areas according to claim 4, characterized in that, When there are multiple installed steel columns ； This represents the number of steel columns that have been installed. Let K be the mass of the equipment corresponding to the i-th installed steel column, in kg.

6. The method for zoned construction of boiler steel frames in coastal silt geology according to claim 5, characterized in that, In step S3, the data analysis system can calculate the offset, settlement rebound, correction load and expected correction time of the counter-pressure load of the raft foundation in each area. Calculate the preset installation deviation value of the column; The least squares method is used to fit the offset trend curve and settlement trend curve of the column foundation, and the change value of foundation settlement caused by unit load is output.

7. The method for zoned construction of boiler steel frame in coastal silt geology according to claim 1, characterized in that, In step S4, the specific method of the surcharge counter-pressure correction is as follows: in the area opposite to the foundation offset, the surcharge position and load size are determined according to the offset trend value output by the data analysis system, and the bias pressure is applied by the surcharge block to eliminate the foundation offset caused by the extrusion during pile foundation construction.

8. The method for zoned construction of boiler steel frame in coastal silt geology according to claim 1, characterized in that, In step S5, the curing agent consists of the following components in parts by weight: 6 parts cement, nanoparticles with a particle size of 500 nm. 3 portions of nanoparticles with a particle size of 400nm 2 parts, polyvinyl alcohol fiber 0.2 parts.

9. The method for zoned construction of boiler steel frames in coastal silt geology according to claim 1, characterized in that, In step S2, the real-time monitoring adopts a multi-angle measurement method, including: The boiler centerline is fitted using professional measurement data and used as the installation reference. The boiler baseline is verified by measuring professional data, and the deviation between the overall axis of the boiler and the plant's measurement system is adjusted.

10. The method for zoned construction of boiler steel frames in coastal silt geological areas according to any one of claims 1-9, characterized in that, After the steel frame is installed, the overall technical specifications meet the following requirements: Plate beam deflection ≤3mm; Maximum deviation of column center ≤3mm; The maximum deviation of longitudinal length is ≤5mm, and the maximum deviation of transverse length is ≤2mm; The elevation difference between adjacent columns is ≤3mm, and the maximum elevation deviation of columns is ≤2mm; The maximum diagonal difference is ≤5mm.

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