CN110836028B - Double-high-span steel-making tower installation method - Google Patents
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Abstract
The invention particularly relates to a double-high-span steel-making tower installation method; the method is characterized in that: the method is characterized by comprising the following steps: the construction method comprises the steps of preferentially constructing a 1#2# tower high-span high-rise frame; the components are installed in a modularized mode, the installation sequence adopts a normal installation method, and the components are installed from bottom to top in sequence; hoisting the bottom layer column by using a crawler crane, and adjusting and secondarily grouting after the bottom layer column is installed; after the bottom layer columns are installed, frame beams, bent beams and inter-column support installation are carried out to assemble the platform secondary beams and the iron alloy bin, and the platform plate is sequentially installed from bottom to top; mounting a tower high-span two-section column; the electromechanical tube is synchronously inserted and installed; and finally, the crawler crane moves back to the field. Compared with the traditional single high-span tower, the method adopts modular assembly instead of the traditional assembly and installation at high altitude one by one, thereby saving the shift cost of the crawler crane platform and improving the operation efficiency.
Description
Technical Field
The invention relates to the field of building construction, in particular to a method for installing a double-high-span steel-making tower.
Background
The steel-making tower is the core of steel making, and a large amount of equipment, pipelines and bridge cables are concentrated in platforms at each layer of the tower. In the traditional steelmaking plant design, the design structure of the tower building of the steelmaking plant is single high span, the installation process is mature, but the installation experience of the structure of the steelmaking double high span tower building in China is zero, the installation experience of the steelmaking double high span tower building is existed in the quiet steelmaking project of the south-crossing river before the company, but the steelmaking double high span tower buildings are relatively parallel and are not connected, so the construction is basically carried out according to the conventional tower installation process, in the project, the installation of the steelmaking double high span tower building can not be realized according to the conventional single high span steelmaking plant installation method, and the main reason is that the steelmaking double high span tower buildings are connected.
Disclosure of Invention
The invention aims to overcome the defects and provides a construction method for a double-high-span steel-making tower.
In order to achieve the above object, the present invention is realized by:
a method for installing a double-high span steel-making tower comprises
Step 1, preferentially constructing a 1#2# tower high-span high-rise frame according to the construction sequence of a converter foundation, wherein the high-rise frame is divided into seven layers, mainly comprising +11.35m, 20.15m, 27.5m, 36.65m, 42.5m, 47.85m and 59 m;
step 2, modularly installing tower high-span H-1/H10-14 line components, wherein the installation sequence adopts a normal installation method, and the components are sequentially installed from bottom to top;
step 3, hoisting the bottom-layer column by using 350t and 260t crawler cranes, wherein the hoisting range of the 350t and 260t crawler cranes covers the H-1/H10-14 line, and adjusting and secondary grouting are performed after the bottom-layer column is installed;
step 4, after the bottom layer column is installed, carrying out support installation on the frame beam, the bent frame beam and the column to ensure that the bottom layer column forms structural stability;
step 5, assembling 11.35m, 20.15m and 27.5m platform secondary beams and ferroalloy storage bins, and sequentially installing platform plates from bottom to top, so as to insert equipment and pipeline installation, ensure safety isolation during cross operation, enable motor-generator tube professional to be installed synchronously, and shorten construction period;
step 6, after the platforms of 11.35m, 20.15m and 27.5m are installed, installing two-section columns of the tower high-span H-1/H10-14 line, and similarly installing frame beams, bent beams and inter-column supports to enable the bottom-layer columns to form structural stability;
step 7, sequentially installing platform secondary beams and platform plates of 36.65m, 42.5m and 47.85m, synchronously inserting and installing electromechanical tubes, wherein a No. 1 and No. 2 deaerator is arranged on a platform of 36m, and the installation weight reaches 30t, so when a high-span tower is installed, an equipment supply plan must be closely tracked, large-scale equipment influencing tower closure mainly comprises the deaerator, a vaporization flue and a steam pocket, and other small-scale equipment can be installed by using a truck crane after the tower is closed;
step 8, after the 47.85m platform is installed, the last section of the vaporization flue-bending flue is also installed;
step 9, at the moment, the J-K feeding II spans 9-15 lines of 260t of crawler cranes can be installed on a J-K10-14 line 43m oxygen lance platform, and the G-H refining spans 10-14 lines of 350t of crawler cranes are synchronously installed on a H-J10-14 line high-span top-layer column, a frame beam and a bent frame beam;
step 10, J-K is installed across a 10-14-line 43m oxygen lance platform by adopting a flip-chip method, and is disassembled from 14 lines to 10 lines, and a dust collection cover, an 48.74m platform, a 53.66m platform, a ventilation shaft and a roofing tertiary dust removal pipeline below the 43m oxygen lance platform are hoisted in sequence;
11, after H-J span 10-14 line high-span top layer columns, frame beams and bent frames form structural stability, starting platform installation, steam drum hoisting, and sealing a roof and a dust hood on the roof;
step 12, the most central part of the double-high-span tower installation process is that a K-row 1/11-11 line 43.89m oxygen lance gas platform and a 3#4 converter high-span tower platform share one platform beam, and the platform beam is connected with a 1/K-K span two-section column of a 3#4 converter, so that the K-row 1/11-11 line 43.89m oxygen lance gas platform can be installed only when the 1/K-K section column of the 3#4 converter is installed;
step 13, optimally installing time nodes of 8-11 bottom-layer columns of 1/K-K rows of high-rise frames of 3#4 converter tower buildings: when the 47m platform is installed on the No. 1 and No. 2 tower, the synchronous installation of a first section of column and the first three layers of platforms of the No. 3 and No. 4 tower is completed; when the 59m platform and the roof of the No. 1 No. 2 tower are installed, the No. 1 No. 2 oxygen lance platform is installed synchronously, and the two-section column and the 47m platform of the No. 3 No. 4 tower are installed completely; when the oxygen lance platform is installed from 14 lines to 11 lines, the installation of the No. 3#4 tower 59m and the roof is completed. Therefore, the synchronous progress and the complementary interference of the connection area of the 1#2 tower and the 3#4 tower are achieved, finally, 260t of reserved frames of the 1#2 tower is used for spanning 1/11-11 lines in JK to hoist the final oxygen lance platform, the reserved roof is unloaded from 8 lines to 1 line from JK after hoisting is finished, the crawler crane retreats from the field, 250t of reserved frames of the 3#4 tower are used for unloading the reserved roof from 9-1 lines from LM spanning 9 lines, and finally the crawler crane retreats from the field.
Compared with the traditional single high-span tower, the method adopts modular assembly, for example: 59m roofing dust excluding hood, the dust cage below 43m oxygen rifle platform, roofing purlin all adopt the modularization installation, assemble on ground, wholly hoist, rather than traditional one by one splice in high altitude, have practiced thrift track platform shift cost and have improved the operating efficiency. The high-altitude operation time is reduced in the aspect of safety, and the safety risk is reduced.
Compared with the traditional single high-span tower installation process, the double high-span tower adopts a normal installation method, and platforms on each layer are installed and sealed along with segmented steel columns, so that the purpose is to enable the motor and electric pipe major to be capable of inserting construction synchronously, the construction period is greatly shortened, the construction cost is saved, and the construction safety is guaranteed.
When a 43m oxygen lance platform is installed from a JK span 14-10, a disassembly and assembly method is adopted, the installation of a bottom layer column, each layer of platform and two sections of columns of a 3#4 furnace high-span tower is synchronously carried out, mutual interference is avoided, the synchronization of the construction progress of a 1#2# tower and a 3#4# tower can be ensured, the construction period is ensured, and when the platform is finally disassembled to 11 lines, 350t crawler cranes are synchronously utilized to hoist a 3#4# tower steam pocket and seal the last span of the JK oxygen lance-spanning platform.
Drawings
Fig. 1 is a plan view and a perspective view of a double high-span tower.
Fig. 2 is a layout diagram of a track crane retreating route and a track crane.
Detailed Description
A double-high span steelmaking tower installation method comprises the following steps:
step one, a double-high-span tower layout (as shown in figure 1);
step two, introducing a double-high-span tower process;
the 43m platform of the 1#2 high-span tower and the 3#4 high-span tower are connected at K-row 1/11-11 two-section columns, therefore, if an oxygen lance platform of the 10-14 line of the 1#2 high-span tower is to be completed, the two-section columns of the 3#4 tower must be completed, but because the manufacturing amount of the steel structure of the double-high-span steel plant reaches 8.5 ten thousand tons, and the columns are all designed to be box-type columns, the manufacturing amount cannot reach the condition that the double-high-span tower is constructed simultaneously, the optimal and reasonable double-high-span tower installation process must be found according to the manufacturing progress of the steel structure, and the optimal installation effect can be achieved in safety, quality, cost and progress.
Step three, constructing a double high-span tower;
3.1 before the double-high-span tower is installed, the civil engineering column foundation preferentially concentrates the construction of the double-high-span tower foundation and the converter foundation.
3.2 the steel construction drawing is received the back, is deepened by deepening the company, and the tower steel construction is deepened to double high-span to the preferential centralized resource, notices the steel column segmentation position, and the steel column segmentation principle makes things convenient for steel column commodity circulation transportation and construction hoist and mount, and double high-span steel column installation elevation is highest to reach 70.8m in this project, divide into the three-section, and bottom layer post installation top elevation +28.3m, two sections post installation top elevation +51.87m, top layer post installation top elevation +70.8 m.
And 3.3, considering the track crane entering and exiting routes, wherein the track crane exiting route determines the installation sequence of the double-high-span tower, and in the project, 1-8 line roofs with the feeding I span and the feeding II span are reserved and used as the track crane exiting route, and the reserved roofs are installed in the direction of the 8-1 line. (FIG. 2)
3.4 combine the characteristics such as two high tower layouts of striding, operation radius, maximum component weight, choose suitable economic crawler crane, in this project, arrange 1 350t crawler crane and 1 260t crawler crane respectively in 1#2 tower G-H refining stride 9-15 line and J-K reinforced II stride 9-15 line, respectively arrange 1 250t crawler crane in 3#4 tower J-K reinforced II stride 7-11 line and L-M reinforced I stride 7-11 line respectively. (FIG. 2)
3.5 according to the construction sequence of the converter foundation, the high-span high-rise frame of the No. 1#2 tower building is preferentially constructed, and the high-rise frame is mainly divided into seven layers, namely +11.35m, 20.15m, 27.5m, 36.65m, 42.5m, 47.85m and 59 m.
The tower high-span H-1/H10-14 line components are installed in a modularized mode, the installation sequence adopts a forward installation method, and the components are installed in sequence from bottom to top;
hoisting the bottom-layer column by using 350t and 260t crawler cranes, covering the hoisting range of the 350t and 260t crawler cranes with H-1/H10-14 lines, and adjusting and performing secondary grouting after the bottom-layer column is installed;
after the bottom layer column is installed, the frame beam, the bent frame beam and the support among the columns are installed, so that the bottom layer column forms structural stability;
assembling 11.35m, 20.15m and 27.5m platform secondary beams and ferroalloy bins, and sequentially installing platform plates from bottom to top, so as to insert equipment and pipeline installation, ensure safety isolation in cross operation, enable the professional of electromechanical tubes to be synchronously installed, and shorten the construction period;
after the platforms of 11.35m, 20.15m and 27.5m are installed, the two-section column with the high span of the tower and H-1/H10-14 lines is installed, and the frame beam, the bent frame beam and the inter-column support are also installed, so that the bottom-layer column forms structural stability;
the method is characterized in that platform secondary beams and platform plates of 36.65m, 42.5m and 47.85m are sequentially installed, electromechanical tubes are synchronously inserted and installed, a No. 1 and No. 2 deaerator is arranged on a platform of 36m, and the installation weight reaches 30t, so when a high-span tower is installed, an equipment supply plan must be closely tracked, large-scale equipment influencing tower closure mainly comprises the deaerator, a vaporization flue and a steam pocket, and other small-scale equipment can be installed by using a truck crane after the tower closure.
After the 47.85m platform is installed, the last section of the vaporizing flue-bending flue is also installed.
At the moment, the J-K charging II spans 9-15 lines of 260t crawler crane can be installed on a J-K10-14 line 43m oxygen lance platform, and the G-H refining spans 10-14 lines of 350t crawler crane synchronously carries out H-J10-14 line high-span top-layer column, frame beam and framed bent beam installation.
(9) J-K is installed across the 10-14 line 43m oxygen lance platform by adopting a flip-chip method, and is disassembled from 14 line to 10 line, and a dust hood, an 48.74m platform, a 53.66m platform, a ventilation shaft and a roofing tertiary dust removal pipeline below the 43m oxygen lance platform are hoisted in sequence.
(10) And after the H-J span 10-14 line high-span top layer column, the frame beam and the bent frame beam form structural stability, platform installation, steam drum hoisting, roof sealing and a dust hood on the roof are started.
The most central part of the double-high-span tower installation process is that a K-row 1/11-11 line 43.89m oxygen lance gas platform and a 3#4 converter high-span tower platform share one platform beam, and the platform beam is connected with a 1/K-K span two-section column of a 3#4 converter, so that the K-row 1/11-11 line 43.89m oxygen lance gas platform can be installed only after the 1/K-K two-section column of the 3#4 converter is installed.
Optimal installation time node of 8-11 bottom-layer column of 1/K-K column of high-rise frame of 3#4 converter tower: when the 47m platform is installed on the No. 1 and No. 2 tower, the synchronous installation of a first section of column and the first three layers of platforms of the No. 3 and No. 4 tower is completed; when the 59m platform and the roof of the No. 1 No. 2 tower are installed, the No. 1 No. 2 oxygen lance platform is installed synchronously, and the two-section column and the 47m platform of the No. 3 No. 4 tower are installed completely; when the oxygen lance platform is installed from 14 lines to 11 lines, the installation of the No. 3#4 tower 59m and the roof is completed. Therefore, the connection region of the 1#2 tower and the 3#4 tower is synchronous in progress and complementary in interference, finally, 260t of reserved frames of the 1#2 tower is used for hoisting a final oxygen lance platform in a JK crossing 1/11-11 line, the reserved roof is unloaded from the JK crossing 8 line to the 1 line after hoisting is finished, the crawler crane moves back, 250t of reserved frames of the 3#4 tower are used for unloading the reserved roof from the 9-1 line in an LM crossing 9 line, and finally the crawler crane moves back, so that the double-high-crossing tower is the best construction and installation process in the aspects of construction progress, construction safety and cost control.
Claims (1)
1. A double-high span steel-making tower installation method is characterized in that: comprises that
Step 1, preferentially constructing a 1#2# tower high-span high-rise frame according to the construction sequence of a converter foundation, wherein the high-rise frame is divided into seven layers, namely +11.35m, 20.15m, 27.5m, 36.65m, 42.5m, 47.85m and 59 m;
step 2, modularly installing tower high-span H-1/H10-14 line components, wherein the installation sequence adopts a normal installation method, and the components are sequentially installed from bottom to top;
step 3, hoisting the bottom-layer column by using 350t and 260t crawler cranes, wherein the hoisting range of the 350t and 260t crawler cranes covers the H-1/H10-14 line, and adjusting and secondary grouting are performed after the bottom-layer column is installed;
step 4, after the bottom layer column is installed, carrying out support installation on the frame beam, the bent frame beam and the column to ensure that the bottom layer column forms structural stability;
step 5, assembling 11.35m, 20.15m and 27.5m platform secondary beams and ferroalloy storage bins, and sequentially installing platform plates from bottom to top, so as to insert equipment and pipeline installation, ensure safety isolation during cross operation, enable motor-generator tube professional to be installed synchronously, and shorten construction period;
step 6, after the platforms of 11.35m, 20.15m and 27.5m are installed, installing two-section columns of the tower high-span H-1/H10-14 line, and similarly installing frame beams, bent beams and inter-column supports to enable the bottom-layer columns to form structural stability;
step 7, sequentially installing platform secondary beams and platform plates of 36.65m, 42.5m and 47.85m, synchronously inserting and installing electromechanical tubes, wherein a No. 1 and No. 2 deaerator is arranged on a platform of 36m, and the installation weight reaches 30t, so when a high-span tower is installed, equipment supply plans must be closely tracked, large-scale equipment for closing the tower is influenced, the large-scale equipment comprises the deaerator, a vaporization flue and a steam pocket, and other small-scale equipment is installed by a truck crane after the tower is closed;
step 8, after the 47.85m platform is installed, the last section of the vaporization flue-bending flue is also installed;
step 9, at the moment, the J-K feeding II spans 9-15 lines of 260t of crawler cranes can be installed on a J-K10-14 line 43m oxygen lance platform, and the G-H refining spans 10-14 lines of 350t of crawler cranes are synchronously installed on a H-J10-14 line high-span top-layer column, a frame beam and a bent frame beam;
step 10, J-K is installed across a 10-14-line 43m oxygen lance platform by adopting a flip-chip method, and is disassembled from 14 lines to 10 lines, and a dust collection cover, an 48.74m platform, a 53.66m platform, a ventilation shaft and a roofing tertiary dust removal pipeline below the 43m oxygen lance platform are hoisted in sequence;
11, after H-J span 10-14 line high-span top layer columns, frame beams and bent frames form structural stability, starting platform installation, steam drum hoisting, and sealing a roof and a dust hood on the roof;
step 12, the most central part of the double-high-span tower installation process is that a K-row 1/11-11 line 43.89m oxygen lance gas platform and a 3#4 converter high-span tower platform share one platform beam, and the platform beam is connected with a 1/K-K span two-section column of a 3#4 converter, so that the K-row 1/11-11 line 43.89m oxygen lance gas platform can be installed only when the 1/K-K section column of the 3#4 converter is installed;
step 13, installing time nodes of 8-11 bottom columns of 1/K-K rows of high-rise frames of 3#4 converter tower buildings: when the 47m platform is installed on the No. 1 and No. 2 tower, the synchronous installation of a first section of column and the first three layers of platforms of the No. 3 and No. 4 tower is completed; when the 59m platform and the roof of the No. 1 No. 2 tower are installed, the No. 1 No. 2 oxygen lance platform is installed synchronously, and the two-section column and the 47m platform of the No. 3 No. 4 tower are installed completely; when the oxygen lance platform is installed from 14 lines to 11 lines, the installation of the No. 3 No. 4 tower 59m and the roof is completed; therefore, the connection region of the 1#2 tower and the 3#4 tower is synchronous in progress and does not interfere with each other, finally, 260t of crawler cranes are reserved on the 1#2 tower high-rise frame to hoist the final oxygen lance platform in a JK crossing 1/11-11 line, the reserved roof is unloaded from the JK crossing 8 line to the 1 line after hoisting is finished, the crawler cranes retreat from the field, 350t of crawler cranes are reserved on the 3#4 tower high-rise frame to unload the reserved roof from the 9-1 line when the LM crossing 9 line, and finally the crawler cranes retreat from the field.
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| CN114807494B (en) * | 2022-04-28 | 2024-01-23 | 重庆钢铁股份有限公司 | Method for replacing crane beam of receiving span and refining span of steel mill without stopping production |
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| CN100432239C (en) * | 2004-03-17 | 2008-11-12 | 技术资源有限公司 | Method of building a direct smelting plant |
| CN100569625C (en) * | 2006-01-26 | 2009-12-16 | 贵阳铝镁设计研究院 | The localization method of single-layer multiple-span bent column crane beam |
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