CN108716289B - Installation method of factory building extension steel column located at existing pipeline - Google Patents
Installation method of factory building extension steel column located at existing pipeline Download PDFInfo
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Abstract
The invention relates to a method for installing a factory building extension steel column at an existing pipeline, which belongs to a method for installing a steel structure of factory building extension, and is characterized in that the steel column of an extension factory building is divided into an upper steel column and a lower steel column, a column inner support positioned below an energy medium pipeline collision position in the lower steel column is changed into bolt connection from welding connection, so that the lower section of the lower steel column is provided with an n-shaped straight-through groove, when the lower steel column is installed, the column inner support is firstly removed, then the lower steel column is downwards inserted from the upper part of the energy medium pipeline, a striding mode is adopted, the lower steel column crosses the energy medium pipeline and then is inserted into a cup foundation, and after the lower steel column is installed, the upper steel column is installed, and the construction steps are: screening installation collision points of the extension steel columns of the factory building; secondly, designing the structure of a steel column at the expansion collision point of the factory building; and thirdly, mounting steel columns at the expansion collision points of the plant, so that the problem of mounting collision between the production energy medium pipelines and the steel columns of the expansion plant is solved, and the cost is reduced.
Description
Technical Field
The invention belongs to a method for installing a steel structure for expanding a plant, and particularly relates to a method for installing steel columns for expanding the plant.
Background
Metallurgical engineering is often encountered with: the factory building is due to the fact that an owner initially establishes the scale or initially limits investment funds, when the subsequent production line is improved in process or production scale, the problem that the original production workshop is not enough often occurs, and the existing main mode for solving the problem is to expand the original factory building. However, in the original production workshop, in order to meet the requirement of producing energy media at first, the energy media are conveyed to each production user point from an energy medium pipeline outside the factory building through a medium pipe network in the workshop according to the conventional design; when most plants are expanded, generally, the original production line is not arranged to stop production, a pipe network in a plant cannot stop supplying energy media due to production, the installation of steel columns of the expanded plant often meets the problem of blocking of energy media pipelines outside the plant, the common method is to move and change the original pipelines at the blocking positions and give way to the installation positions of the steel columns of the expanded plant, the moved and changed pipelines must stop supplying media during the construction of the method, the original production line must stop production due to stopping supplying media, the pipeline moving and changing must delay the normal production of the plant, the production task indexes of the whole year of an owner are influenced, and the problem that the steel columns of the expanded plant collide with the external energy media pipelines is directly influenced if the problem cannot be solved in time, so that the installation work of the steel columns of the subsequent expanded plant is restricted by the construction progress of projects.
Disclosure of Invention
The invention aims to provide an installation method of a workshop extension steel column at an existing pipeline, which is reasonable in structure, convenient to install, safe and reliable to use, solves the problem that an energy medium pipeline obstructs the installation of the workshop extension steel column, reduces the risk of energy medium supply interruption, ensures the normal production of an original workshop and the effective operation of a workshop extension project, and improves the construction efficiency and quality.
The purpose of the invention is realized by the following steps: a method for installing a factory building extension steel column at an existing pipeline is characterized by comprising the following steps: in order to facilitate installation, the latticed column (hereinafter referred to as a steel column) of the expanded plant is divided into an upper steel column and a lower steel column by taking a bracket plane of the steel column as a boundary, the upper steel column is of an H-shaped steel structure, and the lower steel column is of a latticed column which is axially symmetrical by taking the center of the column and is internally supported by a double-limb belt column. According to the position size of the collision point of the energy medium pipeline and two axial lines (longitudinal and transverse central axial lines) of the steel column of the extension factory building, a column inner support at the position which is higher than the upper surface of the energy medium pipeline by 100mm and lower than the upper surface of the energy medium pipeline in the inner cavity of a lower steel column is changed into bolt fastening connection from welding connection with a connecting plate on the inner wall of the lower steel column, when the lower steel column is installed, the column inner support which is connected with the bolt is temporarily dismounted, at the moment, the lower section of the column inner support is dismounted by the lower steel column to form an n-shaped straight-through groove with a notch, the width of the opening of the n-shaped straight-through groove is larger than the outer diameter of the energy medium pipeline, the height of the n-shaped straight-through groove on the lower steel column is larger than the height of the top surface of the energy medium pipeline, the opening of the n-shaped straight-through groove of the lower, correspondingly inserting the lower end section of a lower steel column into a cup foundation of an expansion steel column of a plant, then installing originally-dismantled column inner supports one by one to enable the lower steel column to form a stable structure, then, conducting alignment of the verticality and the central axis of the lower steel column, after the alignment is finished, filling the lower end section of the lower steel column and a gap in the cup foundation with C30 fine aggregate concrete, and after the strength of the fine aggregate concrete reaches 2Mpa, conducting installation butt joint work of an upper steel column of the steel column, thereby completing installation work of the expansion plant steel column at the position of collision with an energy medium pipeline.
The invention provides a method for installing a factory building extension steel column at an existing pipeline, which comprises the following construction steps: screening installation collision points of the extension steel columns of the factory building; secondly, designing the structure of a steel column at the expansion collision point of the factory building; and thirdly, installing steel columns at collision points of the factory building extension.
Wherein:
screening installation collision points of steel columns for plant extension:
1) and according to the longitudinal and transverse central axes of the original steel column of the factory building and the design file of the factory building extension, the longitudinal and transverse central axes of the steel column of the extended factory building are extended and marked.
2) The intersection point of the longitudinal central axis and the transverse central axis of the expanded plant steel column marked according to the method is a collision point inspection area, the intersection point is the central point for installing the expanded plant steel column, the central point is used as the center, and the outline of the expanded plant steel column is marked on the ground of the installation position by using lime powder according to the outline size of the expanded plant steel column.
3) And checking the quantity of the crossed parts of the projection line of the axis of the energy medium pipeline on the ground and the outline of the steel column of the expanded plant, and counting the size data of the collision points in the height direction of the lower steel column inner support of the energy medium pipeline and the steel column of the expanded plant, thereby completing the screening work of the installation collision points of the steel column of the expanded plant.
Secondly, designing a steel column structure at the expansion collision point of the plant:
1) for convenience of installation, a corbel plane of a steel column is used as a boundary, the steel column is divided into an upper steel column and a lower steel column, statistical collision point sizes of the energy medium pipelines and the lower steel column of the expanded plant steel column in the height direction are used as references, a column inner support located at a position, 100mm higher than and below the elevation of the upper surface of the energy medium pipeline in the lower steel column of the expanded plant is connected with the inner wall of the lower steel column in a welding mode originally and is designed to be in bolt fastening connection, at the moment, an n-shaped straight through groove with an opening is formed in the lower section of the lower steel column, the column inner support is removed, the opening width of the n-shaped straight through groove in the lower steel column is larger than the outer diameter of the energy medium pipeline, and the height of the n-shaped straight through groove in.
2) After the upper steel column and the lower steel column which are positioned at the position of collision with the energy medium pipeline of the extension plant are manufactured according to design, the connection bolts are adopted to enable the column inner supports of the lower steel column to be in corresponding fastening connection with the connection plates on the inner wall of the lower steel column, so that the steel column is prevented from deforming in the transportation process and influencing the subsequent installation accuracy of the lower steel column.
Thirdly, installing steel columns at collision points of the plant extension:
1) after a lower steel column at a collision point of a plant extension and an energy medium pipeline is transported to a construction position, a column inner support located at a position 100mm higher than and below the elevation of the upper surface of the energy medium pipeline in the lower steel column is firstly detached before installation, so that a n-shaped through groove is formed in the lower section of the lower steel column, then the lower steel column is inserted downwards from the upper side of the energy medium pipeline by adopting a straddle type installation form from the upper side of the energy medium pipeline by using a hoisting machine, after the energy medium pipeline is inserted, the lower end section of the lower steel column is correspondingly inserted into a cup foundation of the plant extension steel column, and then the original column inner support is installed and detached one by adopting connecting bolts, so that the lower steel column forms a stable structure.
2) And aligning the elevation of the lower steel column: the height of a steel column is controlled, the perpendicularity and the central axis of the lower steel column are controlled and aligned by adopting base grout at the bottom of the cup foundation, two theodolites which are arranged for 900 are adopted, the perpendicularity and the central axis of the lower steel column are controlled and aligned, after the alignment of the lower steel column is finished, a gap between the lower steel column and the cup foundation is filled with C30 fine aggregate concrete, and after the strength of the fine aggregate concrete reaches 2Mpa, the butt joint installation work of the upper steel column is carried out.
And the installation work of the steel columns at the collision points of the other energy medium pipelines and the steel columns of the extension plant is finished by the same method.
The invention provides a method for installing a factory building extension steel column at an existing pipeline, which divides the steel column at the collision point of an extension factory into an upper steel column and a lower steel column, supports the lower steel column at the position with the elevation 100mm higher than and below the upper surface of the collision position of an energy medium pipeline in the lower steel column, and changes the original welding connection into bolt fastening connection, when the lower steel column is installed, the inner support of the lower steel column at the position with the elevation 100mm higher than and below the upper surface of the energy medium pipeline is firstly removed, so that the lower section of the lower steel column forms a structure with an n-shaped straight through groove, then the lower steel column with the n-shaped straight through groove is inserted downwards from the upper part of the energy medium pipeline, a straddle installation form is adopted, the lower steel column crosses the energy medium pipeline and then is inserted into a cup foundation of the steel column, after the lower steel column is installed, the installation of the upper steel column is carried out, and the method solves the problem that the energy medium pipeline and the expansion factory building steel, the risk of production energy medium supply interruption possibly caused by the interference of the energy medium pipeline and the extension steel column of the plant is reduced, and the synchronous and effective operation of engineering construction and workshop production is ensured.
The method for installing the expansion steel columns of the plant located at the existing pipeline according to the present invention will be further described with reference to the accompanying drawings and examples.
Drawings
Fig. 1 is a schematic layout diagram of an existing energy medium pipeline 1 and an original plant before expansion of the plant in the installation method of the plant expansion steel column located at an existing pipeline according to the present invention.
Fig. 2 is a schematic front view of a lower steel column 2 of an extended plant steel column in the installation method of the plant extension steel column at an existing pipeline according to the present invention.
Fig. 3 is a schematic view illustrating the installation and positioning of the lower steel columns 2 of the extended plant steel columns in the installation method of the plant extension steel columns at the existing pipelines according to the present invention.
Fig. 4 is a schematic view of the installation and positioning of the upper steel columns 3 of the extended plant steel columns in the installation method of the plant extension steel columns at the existing pipelines according to the present invention.
FIG. 5 is a schematic front view of the steel column for plant extension at the existing pipeline according to the present invention after the plant extension is completed
In fig. 1-5:
1. energy medium pipeline 2, lower steel column 3, upper steel column 4, column inner support 5 and bolt
Examples
According to the extension project of a 120t steel converter plant in Shandong, the installation work of the plant extension steel column is completed by adopting the installation method of the plant extension steel column positioned at the existing pipeline.
(I): item overview:
the relevant parameters of the extension factory building structure are as follows: the highest elevation of the lattice steel column of the expanded plant is 38.900m, the weight of the lower steel column 2 of the steel column is 44t, and the length of the lower steel column is 27.400 m; the upper steel column 3 is 14t in weight and 12.500m in length; the height mark size of the upper surface of the energy medium pipeline is as follows: the maximum elevation is 10.000m, and the outer diameter of the energy medium pipeline is 273 mm.
(II) the construction steps are as follows:
step one, screening installation collision points of the extension steel columns of the factory building: (as shown in FIG. 1):
1) according to the longitudinal and transverse central axis of the original steel column of the factory building, according to the factory building extension design file, the longitudinal and transverse central axis positions of the lower steel column 2 of the steel column of the extended factory building are extended and marked.
2) The intersection point of the lower steel column 2 of the expanded plant steel column shown according to the marked longitudinal central axis and the intersection point of the transverse central axis is a collision point inspection area, the intersection point is the central point of the installation of the lower steel column 2 of the expanded plant steel column, and the outline of the lower steel column 2 of the expanded plant steel column is marked at the ground of the installation position by using lime powder according to the outline size of the lower steel column 2 of the expanded plant steel column at the central point position center.
3) The number of the crossed parts of the projection line of the axis of the energy medium pipeline 1 on the ground and the appearance contour line of the lower steel column 2 of the expanded plant steel column is checked, the size data of the collision position of the energy medium pipeline 1 and the column inner support of the lower steel column 2 of the expanded plant steel column in the height direction is counted, and therefore screening work of installation collision points of the plant expanded plant steel column is completed.
Step two, designing a steel column structure at the collision point of the factory building extension: (as shown in figure 2) of the drawings,
1) for convenience of installation, the steel column is divided into an upper steel column 3 and a lower steel column 2 by taking a corbel plane of the steel column as a boundary, a column inner support 4 in the lower steel column 2 of the extension plant and at a position 100mm higher than and below the elevation of the upper surface of the energy medium pipeline 1 is designed to be in fastening connection with a bolt 5 by taking the size of a collision point of the energy medium pipeline 1 and the lower steel column 2 of the extension plant steel column in the height direction as a reference, the lower section of the column inner support 4 in the lower steel column 2 of the extension plant is removed to form an n-shaped straight-through groove with a notch, the width of the opening of the n-shaped straight-through groove in the lower steel column 2 is larger than the outer diameter of the energy medium pipeline 1, and the height of the n-shaped straight-through groove in the lower steel column 2 is larger than 100mm of the elevation of the top surface of the energy medium pipeline 1.
2) After the upper steel column 3 and the lower steel column 2 of the steel column of the expansion plant are manufactured, the inner support 4 of the lower steel column 2 is fixedly connected with the connecting plate in the lower steel column 2 through bolts 5, so that the lower steel column 2 is not deformed in the transportation process, and the subsequent installation precision of the lower steel column 2 is not influenced.
Step three, installing steel columns at collision points of the plant extension: (as shown in FIG. 3, FIG. 4, FIG. 5)
1) After a lower steel column 2 of the extension plant is transported to a construction position, before installation, a column inner support 4 of a part, located at a position 100mm higher than and below the elevation of the upper surface of an energy medium pipeline 1, of the lower steel column 2 is firstly removed, then a hoisting machine is used for downwards installing the lower steel column 2 with an n-shaped through groove from the upper side of the energy medium pipeline 1 at the installation position of the steel column of the extension plant, a straddle type installation mode is adopted, the lower steel column 2 is inserted into a cup foundation of the steel column of the extension plant after passing through the energy medium pipeline 1, then the column inner support 4 which is removed in advance is installed piece by using bolts 5, after the column inner supports 4 are connected through bolts, two ends of each column inner support 4 are welded with a connecting plate in the lower steel column 2, and the lower steel column 2 is enabled to form a stable structure.
2) And aligning the elevation of the lower steel column 2: adopt the bottom seat thick liquid to carry out elevation control, alignment, the straightness and the central point that hang down of lower steel column 2 put control: and (3) controlling and aligning the verticality and the central axis of the lower steel column 2 by adopting two theodolites which are 900-arranged with each other until the design requirements are met, filling a gap between the lower steel column 2 and the cup rim foundation by using C30 fine aggregate concrete after the alignment of the lower steel column 2 is finished, and installing and butting the upper steel column 3 of the steel column after the strength of the fine aggregate concrete reaches 2 Mpa.
And the installation work of the steel columns at the collision points of the energy medium pipelines at other parts and the steel columns of the extension plant is finished by the analogy.
(III) construction effect:
according to the method, 30 steel columns of a 120t steel converter plant in Shandong are expanded, energy medium pipelines at the positions blocked by the steel columns are prevented from moving and changing by 270m, a production line is normally produced when the steel columns are expanded in the plant, and the construction method is commented and confirmed by owners and regulatory units.
Claims (1)
1. A method for installing a factory building extension steel column at an existing pipeline is characterized by comprising the following steps: dividing a steel column of an expanded plant into an upper steel column (3) and a lower steel column (2) by taking a corbel plane of the steel column as a boundary, wherein the upper steel column (3) is of an H-shaped steel structure, the lower steel column (2) is a lattice column which is axially symmetrical by taking a column center and is provided with column inner supports at two limbs, the column inner supports (4) in the inner cavity of the lower steel column (2) at a position which is higher than the upper surface of an energy medium pipeline (1 by 100mm and lower are changed into the fastening connection of bolts (5) according to the position size of collision points of the energy medium pipeline (1) and two axial lines, namely a longitudinal central axis and a transverse central axis, of the steel column of the expanded plant, when the lower steel column (2) is installed, the column inner supports (4) connected with the bolts are temporarily removed, at the moment, the lower steel column inner supports (2) are removed to form straight-through grooves with lower sections and openings, the width of an opening of the n-shaped straight-through groove is larger than the outer diameter of an energy medium pipeline (1), the height of the n-shaped straight-through groove on a lower steel column (2) is larger than the height of the top surface of the energy medium pipeline (1), the opening of the n-shaped straight-through groove on the lower steel column (2) is inserted downwards from the upper part of the energy medium pipeline (1) in a riding installation mode, after the energy medium pipeline (1) is inserted, the lower end section of the lower steel column (2) is correspondingly inserted into a cup opening base of a factory building extension steel column, an originally detached column inner support (4) is installed piece by piece, the lower steel column (2) forms a stable structure, then the verticality and the central axis of the lower steel column (2) are aligned, after the alignment is finished, C30 fine stone concrete is used for filling a gap between the lower end section of the lower steel column (2) and the cup opening base, and after the strength of the fine stone concrete reaches 2Mpa, the butt joint work of an upper steel column (3) of the steel column is carried out, thereby completing the installation work of the steel columns of the expanded plant at the collision part with the energy medium pipeline (1);
the installation method comprises the following construction steps: screening installation collision points of the extension steel columns of the factory building; secondly, designing the structure of a steel column at the expansion collision point of the factory building; thirdly, installing steel columns at collision points of the factory building extension;
wherein:
screening installation collision points of steel columns for plant extension:
1) extending and marking the longitudinal and transverse central axis positions of the steel columns of the expanded plant according to the longitudinal and transverse central axes of the original steel columns of the plant and the design files of the expanded plant;
2) marking the outline of the steel column of the expanded plant on the ground of the installation position by using lime powder by taking the central point as the center and according to the outline size of the steel column of the expanded plant;
3) checking the number of the crossed parts of the projection line of the axis of the energy medium pipeline (1) on the ground and the outline of the steel column of the expanded plant, and counting the size data of collision points of the energy medium pipeline (1) and the column inner support (4) of the lower steel column (2) of the steel column of the expanded plant in the height direction, thereby completing the screening work of the installation collision points of the steel column of the expanded plant;
secondly, designing a steel column structure at the expansion collision point of the plant:
1) for the convenience of installation, the bracket plane of the steel column is taken as a boundary line to divide the steel column into an upper steel column (3) and a lower steel column (2), taking the counted size of the collision point of the energy medium pipeline (1) and the lower steel column (2) of the steel column of the extension factory building in the height direction as a reference, the column inner support (4) in the lower steel column (2) of the extension factory building, which is positioned at the position 100mm higher than the upper surface of the energy medium pipeline (1) and below, is changed into the fastening connection of a bolt (5) from the original welding connection with the connecting plate in the lower steel column (2), at the moment, the lower section of the lower steel column (2) with the inner column support (4) removed forms an n-shaped through groove with a notch, the width of the opening of the n-shaped straight-through groove on the lower steel column (2) is larger than the outer diameter of the energy medium pipeline (1), the height of the n-shaped straight through groove on the lower steel column (2) is greater than the elevation 100mm of the top surface of the energy medium pipeline (1);
2) after an upper steel column (3) and a lower steel column (2) of the expanded plant, which are located at the position of collision with an energy medium pipeline (1), are manufactured according to the design, an inner column support (4) of the lower steel column (2) is fixedly connected with a connecting plate on the inner wall of the lower steel column (2) correspondingly through bolts (5), so that the lower steel column (2) is prevented from deforming in the transportation process and the subsequent installation precision of the lower steel column (2) is prevented from being influenced;
thirdly, installing steel columns at collision points of the plant extension:
1) after the lower steel column (2) at the collision point of the plant extension and the energy medium pipeline is transported to the construction position, before installation, firstly removing a column inner support (4) in the lower steel column (2) at a position 100mm higher than and below the upper surface of the energy medium pipeline (1) to enable the lower section of the lower steel column (2) to form an n-shaped through groove, then inserting the opening of the n-shaped through groove of the lower steel column (2) downwards from the upper part of the energy medium pipeline (1) by adopting a straddle type installation mode from the upper part of the energy medium pipeline (1) by using a hoisting machine, after the energy medium pipeline (1) is inserted, correspondingly inserting the lower end section of the lower steel column (2) into a cup foundation of an expanded steel column of a plant, and then installing originally-dismantled inner column supports (4) piece by adopting bolts (5) to enable the lower steel column (2) to form a stable structure;
2) and aligning the elevation of the lower steel column: adopting base grout at the bottom of the cup foundation to control the elevation, and controlling and aligning the verticality and the central position of the lower steel column (2), adopting two theodolites which are arranged at 90 degrees with each other to control and align the verticality and the central axis of the lower steel column (2), after the alignment of the lower steel column (2) is finished, filling the gap between the lower steel column (2) and the cup foundation with C30 fine aggregate concrete, and after the strength of the fine aggregate concrete reaches 2Mpa, then carrying out butt joint installation work of the upper steel column (3);
and the installation work of the steel columns at the collision points of the other energy medium pipelines (1) and the steel columns of the extension plant is finished by the same method.
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| CN109610867B (en) * | 2018-12-06 | 2021-03-19 | 中国十七冶集团有限公司 | Construction method for enlarging gable structure of factory building |
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| CN103498569B (en) * | 2013-10-12 | 2015-08-05 | 北京筑福国际工程技术有限责任公司 | The inner storey-adding reconstruction concrete-steel structure of old factory building and construction method thereof |
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