CN117145215A - Large-scale bloom-shaped special-shaped steel column sectional assembly construction method for high-speed rail station - Google Patents
Large-scale bloom-shaped special-shaped steel column sectional assembly construction method for high-speed rail station Download PDFInfo
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 380
- 239000010959 steel Substances 0.000 title claims abstract description 380
- 238000010276 construction Methods 0.000 title claims abstract description 32
- 238000005266 casting Methods 0.000 claims abstract description 66
- 238000003466 welding Methods 0.000 claims abstract description 62
- 240000004282 Grewia occidentalis Species 0.000 claims abstract description 15
- 239000004567 concrete Substances 0.000 claims description 28
- 238000009434 installation Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 11
- 238000013461 design Methods 0.000 claims description 6
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 11
- 238000009417 prefabrication Methods 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 5
- RKTYLMNFRDHKIL-UHFFFAOYSA-N copper;5,10,15,20-tetraphenylporphyrin-22,24-diide Chemical compound [Cu+2].C1=CC(C(=C2C=CC([N-]2)=C(C=2C=CC=CC=2)C=2C=CC(N=2)=C(C=2C=CC=CC=2)C2=CC=C3[N-]2)C=2C=CC=CC=2)=NC1=C3C1=CC=CC=C1 RKTYLMNFRDHKIL-UHFFFAOYSA-N 0.000 description 3
- 230000008569 process Effects 0.000 description 3
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- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G19/00—Auxiliary treatment of forms, e.g. dismantling; Cleaning devices
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/12—Mounting of reinforcing inserts; Prestressing
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B2001/0053—Buildings characterised by their shape or layout grid
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2406—Connection nodes
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2463—Connections to foundations
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
- E04B2001/2466—Details of the elongated load-supporting parts
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- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a large-scale flower-shaped special-shaped steel column sectional assembly construction method for a high-speed rail station, which comprises the following steps of: the huge flower-shaped special-shaped steel column is prefabricated in a segmented mode and is divided into a lower section cross-shaped steel skeleton, a special-shaped steel column, an arc-shaped quadrangle box-shaped steel column, a central steel column and a second steel casting; welding the lower section cross-shaped steel framework, the pre-buried column leg bolts and the mother plate into a whole, and pouring a bearing platform around the lower section cross-shaped steel framework; fixedly screwing the special-shaped steel column and the bearing platform embedded part at the bottom; the bottom of the arc-shaped quadrangular box steel column is fixedly connected with the special-shaped steel column by welding; welding the bottom of the central steel column with the middle position of the special-shaped steel column; the arc-shaped four-corner box steel columns are connected through a plurality of layers of external horizontal cross bars; welding a second steel casting on the top of the arc-shaped square box-shaped steel column; the invention performs prefabrication and transportation in sections, improves the manufacturing precision and reduces the transportation cost; the high-altitude welding workload is reduced, and the construction cost is reduced.
Description
Technical Field
The invention relates to the field of steel structure support of high-speed rail stations, in particular to a large-scale flower-shaped special-shaped steel column sectional assembly construction method for a high-speed rail station.
Background
With the continuous development of the construction industry, steel structures are increasingly used as important supporting structures in large building structures, particularly in the construction of high-speed rail stations, and in the construction process of the high-speed rail stations, larger space is required for accommodating passengers going to and from; a wide field of view is also required for viewing and understanding the schedule to be started; a certain space height may also be reserved for later expansion transformation; this requires the steel structure to support the roof or the house cover; the vertical height of the steel structure is also required to be high enough, typically between 40m and 60 m; there is also a need to support house lids with very little steel structure, such as: four or six support the house cover of large tracts of land, had the stable support like this, inside also obtained great space to can hold more people, the space field of vision is also wider.
Therefore, the steel structure is required to have larger bearing capacity, and in order to strengthen the bearing capacity of the steel structure, the volume of the steel structure is increased, and the mass is also increased, so that the steel structure is in a huge state. The prior art generally adopts site construction for the construction of the steel structure, and the welding assembly is carried out on site, so that the steel structure has the advantages that: timely constructing and correcting construction errors in time; but has the disadvantages: the welding is assembled in the air, so that the air welding difficulty is high, the welding operation time is prolonged, the welding technical requirement of a welder is high in an air welding mode, the welding processing cost is high, the high-altitude welding risk is high, the management difficulty is high, and the management cost is increased; the construction period is prolonged, and the construction cost is high.
Disclosure of Invention
The invention aims to overcome the defects of high-altitude construction difficulty, long construction period and high cost in the prior art and provides a large-scale flower-shaped special-shaped steel column sectional assembly construction method for a high-speed rail station; the high-altitude welding workload is reduced, so that various risks brought by high-altitude operation are reduced, the prefabrication is convenient for factories, and the machining precision is higher; the transportation cost is reduced by sectional transportation; the efficiency of on-site installation is improved, construction cost is reduced.
In order to achieve the above purpose, the invention provides a method for sectionally assembling and constructing a huge bloom-shaped special-shaped steel column for a high-speed rail station, which comprises the following steps:
step S1: the huge flower-shaped special-shaped steel column is prefabricated in a segmented mode and is divided into a lower section cross-shaped steel skeleton, a special-shaped steel column, an arc-shaped quadrangle box-shaped steel column, a central steel column and a second steel casting;
step S2: installing a lower section cross-shaped steel skeleton; embedding column leg bolts according to the installation positions, installing corresponding mother boards on the column leg bolts, welding the mother boards and the lower section cross-shaped steel framework into a whole, and performing concrete pouring of a bearing platform around the lower section cross-shaped steel framework;
step S3: hoisting a special-shaped steel column; fixedly screwing the special-shaped steel column and the bearing platform embedded part at the bottom, and then pouring concrete in time;
step S4: building a temporary support frame and hoisting an arc-shaped square box-shaped steel column; constructing a temporary support frame for temporarily supporting the arc-shaped square box-shaped steel column around the special-shaped steel column; the bottoms of the arc-shaped quadrangular box steel columns are fixedly connected with the special-shaped steel columns by welding;
step S5: hoisting a central steel column; welding the bottom of the central steel column with the middle position of the special-shaped steel column; the internal horizontal cross rod and the arc-shaped square box-shaped steel column are welded and fixed;
step S6: hoisting an external horizontal cross rod; the arc-shaped four-corner box steel columns are connected through a plurality of layers of external horizontal cross bars;
step S7: hoisting a second steel casting; and welding the second steel casting on the top of the arc-shaped quadrangle box-shaped steel column, and welding and fixing the second steel casting with the central steel column through the inclined cross rod.
Preferably, the surface of the lower section cross-shaped steel skeleton is provided with pegs connected with concrete, the lower section cross-shaped steel skeleton is formed by splicing and welding a plurality of steel plates, each steel plate is numbered before processing, the welding sequence of each steel plate and the position of a welding line are reasonably arranged, and polishing and leveling are performed after welding is completed.
Preferably, the step S2 further includes: burying column foot bolts according to the mounting positions, mounting the corresponding mother board on the column foot bolts, and screwing and clamping the mother board by using a nut on the upper part and the lower part of each column foot bolt; the distance between the end part of the column foot bolt and the motherboard is adjusted according to the actual installation height, and coarse positioning is carried out according to the pre-buried steel bar head and the installation height on the foundation cushion layer originally; a theodolite is respectively arranged on the longitudinal axis and the transverse axis, a level gauge is arranged at a place which is close to the installation site and convenient to install, the correction axis of the theodolite is correspondingly overlapped with the axis marked on the motherboard, and three instruments are used for simultaneously comparing the embedded bolts; after repeated comparison and inspection, checking the levelness of the motherboard by using a leveling ruler after confirming the axis and the elevation of the embedded bolt, checking the verticality of the bolt by using a plumb bob, and connecting and welding the embedded column foot bolt with the steel bar which is originally embedded on the cushion layer at an angle of 45-60 degrees by using the steel bar after the verticality of the bolt is correct.
Preferably, the special-shaped steel column comprises steel column brackets, a middle section steel column and an upper section steel column from bottom to top; and the surfaces of the steel column bracket and the middle section steel column are provided with pegs connected with concrete.
Preferably, the step S3 further includes: hoisting the steel column bracket by using a crane prepared in advance after the bearing platform concrete reaches the strength required by design, fixedly connecting the steel column bracket with a bearing platform embedded part at the bottom by using a manual auxiliary tool, simultaneously screwing the embedded anchor bolt, and simultaneously calibrating and positioning the steel column bracket, and screwing the embedded anchor bolt after the height, the levelness and the verticality of the steel column bracket meet the design requirements; then carrying out hidden acceptance and timely pouring concrete; hoisting the middle section steel column and performing concrete construction; and finally, hoisting the upper section steel column.
Preferably, the step S4 further includes: the arc four-corner box steel column is large in size, the arc four-corner box steel column is hoisted by the crane for many times, the temporary support frame is used as an auxiliary support during hoisting, the temporary support frame comprises an H-shaped steel table surface at the lower part of the arc four-corner box steel column and a plurality of round steel pipes welded on the H-shaped steel table surface, the upper part of each round steel pipe is welded on the arc four-corner box steel column to serve as a temporary support in the middle part, the hoisting of four arc four-corner box steel columns is completed, and the bottom of the arc four-corner box steel column is fixedly connected with the upper section steel column through welding.
Preferably, the step S5 further includes: the central steel column comprises a lower section central box steel column, a third steel casting, an upper section central box steel column and a first steel casting; firstly, hoisting a lower section central box steel column, wherein the lower section central box steel column is fixedly connected with the middle position of an upper section steel column by welding; the side surface is welded and fixed with the arc-shaped square box-shaped steel column through the internal horizontal cross rod; secondly, hoisting a third steel casting, wherein the third steel casting is welded with the lower section central box steel column; the side surface is welded and fixed with the arc-shaped square box-shaped steel column through the internal horizontal cross rod; hoisting the upper section central box steel column again, and welding the upper section central box steel column and the third steel casting; finally, hoisting a first steel casting, wherein the first steel casting is welded with the upper section central box steel column; thereby completing the hoisting and welding of the whole central steel column.
Preferably, the step S6 further includes: hoisting an external horizontal cross rod, wherein the external horizontal cross rod is a member connected with an arc-shaped square box steel column and is divided into 8 external horizontal cross rod connecting pieces in total of 2 layers, and after the hoisting of a central steel column is completed, the external horizontal cross rod connecting pieces are hoisted in time so as to ensure the overall stability of the arc-shaped square box steel column; and (3) hoisting the external horizontal cross rod from bottom to top by using the crawler crane, and performing installation welding from bottom to top in the vertical direction.
Preferably, the step S7 further includes: and after the second steel casting is assembled, the second steel casting is slowly lifted to the top of the arc-shaped square box-shaped steel column by using the crawler crane, the second steel casting and the top of the arc-shaped square box-shaped steel column are welded and fixed by manual assistance and calibration positioning, and the second steel casting construction is completed by welding and fixing the inclined cross rod and the third steel casting.
Compared with the prior art, the invention has the beneficial effects that:
the giant flower-shaped special-shaped steel column plays a role in supporting the roof of the high-speed rail station, and is high in vertical height and heavy in weight; for convenient construction, the huge flower-shaped special-shaped steel column is prefabricated in a segmented mode, and can be divided into five parts according to the requirements of site construction, wherein the five parts are respectively: the steel casting comprises a lower section cross-shaped steel skeleton, a special-shaped steel column, an arc-shaped square box-shaped steel column, a central steel column and a second steel casting; the five parts are prefabricated, produced and assembled in factories respectively, and finally, the whole assembly and the assembly of connecting pieces are carried out by using a sectional hoisting mode; the parts are prefabricated in factories, which belongs to small-batch production, and is favorable for precision control and obtaining semi-finished prefabricated parts with stable precision; the assembly is carried out on the ground, the production efficiency is higher, and the processing cost is saved; meanwhile, each part has lighter weight during transportation, is beneficial to block transportation, reduces the transportation cost and is safer in transportation; and the high-altitude welding workload is reduced, so that various risks brought by high-altitude operation are reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a giant bloom shaped profiled steel column for a high-speed rail station provided by the invention;
FIG. 2 is a schematic view of the upper half of a giant bloom shaped profiled steel column for a high-speed rail station provided by the invention;
FIG. 3 is a schematic structural view of the bottom of the lower section cross-shaped steel skeleton provided by the invention;
fig. 4 is a schematic structural view of a steel column bracket provided by the invention;
FIG. 5 is a schematic view of the structure of the middle section steel column provided by the invention;
FIG. 6 is a schematic structural view of an upper section steel column provided by the invention;
FIG. 7 is a schematic structural view of an arc-shaped tetragonal box steel column provided by the invention;
FIG. 8 is a schematic view of a third steel casting according to the present invention;
FIG. 9 is a schematic view of a first steel casting according to the present invention;
fig. 10 is a schematic view of the structure of a second steel casting provided by the present invention.
The drawings include:
1. giant flower-shaped special-shaped steel columns; 11. a lower section cross-shaped steel skeleton; 12. a special-shaped steel column; 13. arc-shaped square box-shaped steel columns; 14. a central steel column; 15. a second steel casting; 2. an inner horizontal rail; 3. an outer horizontal rail; 4. a sloped rail; 121. steel column bracket; 122. a middle section steel column; 123. an upper section steel column; 141. a lower section central box steel column; 142. a third steel casting; 143. an upper section of central box steel column; 144. a first steel casting; 51. a peg; 52. a motherboard; 53. and a column base bolt.
Detailed Description
The technical solutions of the present embodiment of the present invention will be clearly and completely described below with reference to the drawings in the present embodiment of the present invention, and it is apparent that the described present embodiment is one embodiment of the present invention, but not all the present embodiments. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present invention.
Referring to fig. 1 to 10, the present invention provides a method for sectional assembly and construction of a huge bloom-shaped profiled steel column for a high-speed rail station.
In the embodiment, all the house covers of the high-speed rail station are supported by six huge flowering shaped special-shaped steel columns 1, the huge flowering shaped special-shaped steel columns 1 are structures formed by wrapping steel reinforced concrete with steel sections, the total height is 55.5m, the length from the foundation of the flowering column to the flowering section reaches 26.5m, and steel plates with the thickness of 60 mm-80 mm are used as steel sections.
The embodiment adopts a process method of 'first assembling in sections and then assembling in total', and the manufacturing precision of the single component is ensured, so that the assembly precision of the huge flower-shaped special-shaped steel column is ensured.
Specifically, step S1: dividing the huge flower-shaped special-shaped steel column 1 into five parts from bottom to top according to actual construction conditions, and respectively prefabricating in factories, and dividing the large flower-shaped special-shaped steel column into a lower section cross-shaped steel skeleton 11, a special-shaped steel column 12, an arc-shaped square box-shaped steel column 13, a central steel column 14 and a second steel casting 15; the module is manufactured in a prefabricated factory, transported to the site, and assembled by means of equipment, devices, instruments and the like such as a crane, a temporary support, a measuring instrument and the like.
Furthermore, each part is prefabricated in a factory, which belongs to small-batch production and is beneficial to precision control and obtaining a semi-finished product prefabricated part with stable precision; the assembly is carried out on the ground, the production efficiency is higher, and the processing cost is saved; meanwhile, each part has lighter weight during transportation, is beneficial to block transportation, reduces the transportation cost and is safer in transportation; and the high-altitude welding workload is reduced, so that various risks brought by high-altitude operation are reduced.
As shown in fig. 3, the lower section cross-shaped steel skeleton 11 is firstly processed, the lower section cross-shaped steel skeleton 11 is formed by splicing and welding a plurality of rectangular steel plates, each steel plate is numbered before processing by splicing and welding the plurality of steel plates, the welding sequence of each steel plate and the position of a welding line are reasonably arranged, and polishing and leveling are performed after welding is completed; firstly, one side is processed, then the welded structure is turned over by a chain block, and then the other side is processed; finally, the surface of the welded lower section cross-shaped steel skeleton 11 is provided with a bolt 51 connected with concrete, and further, the lower section cross-shaped steel skeleton 11 is required to be embedded in the concrete, and the bolt 51 is arranged to facilitate the connection with the concrete, so that the connection is firmer and more stable.
Further, in this embodiment, as shown in fig. 1, the lower section cross-shaped steel skeleton 11 has a relatively high vertical height, and the lower section cross-shaped steel skeleton 11 may be divided into two upper and lower parts for processing, which is beneficial to processing and transportation, thereby reducing processing cost and transportation cost.
Step S2: installing a lower section cross-shaped steel skeleton 11; according to the installation position, embedded parts such as column foot bolts 53 are embedded, a corresponding mother board 52 is installed on the column foot bolts 53, the mother board 52 and the lower section cross-shaped steel skeleton 11 are welded into a whole, and concrete pouring of a bearing platform is carried out around the lower section cross-shaped steel skeleton 11.
The step S2 further includes: embedding embedded parts such as column foot bolts 53 and the like according to the installation positions, installing the corresponding mother board 52 on the column foot bolts 53, and screwing up and down one nut on each column foot bolt 53 to clamp the mother board 52; the distance between the end of each column leg bolt 53 and the motherboard 52 is adjusted according to the actual installation height, and coarse positioning is carried out according to the pre-buried steel bar heads and the installation height on the foundation mat originally; a theodolite is respectively arranged on the longitudinal axis and the transverse axis, a level gauge is arranged at a place which is close to the installation site and convenient to install, the correction axis of the theodolite is correspondingly overlapped with the axis marked on the motherboard 52, and three instruments are used for simultaneously comparing the embedded bolts; after repeated comparison and inspection, the axis and elevation of the embedded bolt are confirmed to be correct, the levelness of the motherboard 52 is checked by a level ruler, the verticality of the bolt is checked by a plumb bob, and the embedded bolt and the steel bar originally embedded on the cushion layer are connected and welded at an angle of 45-60 degrees by the steel bar after the verticality of the bolt is correct.
The motherboard 52 and the lower section cross-shaped steel skeleton 11 are welded into a whole to ensure the rigidity and strength of the stress when the concrete is poured fully. After the embedded part is fixed, after the embedded part is accepted by a construction party, a general contractor, a supervision unit or an owner, concrete pouring is carried out, and concrete construction is carried out strictly according to the technical bottoms when concrete is poured, so that the pouring quality is ensured.
Step S3: as shown in fig. 1, the profiled steel column 12 is hoisted; because the vertical height of the special-shaped steel column 12 is longer, in the embodiment, the special-shaped steel column 12 is divided into three parts according to the external structure of the special-shaped steel column 12, specifically, the special-shaped steel column 12 comprises a steel column bracket 121, a middle section steel column 122 and an upper section steel column 123 from bottom to top; the surfaces of the steel column bracket 121 and the middle section steel column 122 are provided with pegs 51 connected with concrete.
The step S3 further includes: after the bearing platform concrete reaches the strength required by design, hoisting by using a crane prepared in advance, fixedly connecting the manually-assisted steel column bracket 121 with a bearing platform embedded part at the bottom, simultaneously screwing the embedded anchor bolt, and simultaneously calibrating and positioning the steel column bracket 121, wherein after the height, the levelness and the verticality of the steel column bracket 121 meet the design requirement, the embedded anchor bolt is screwed; then constructing the steel bars and templates, and performing concealed acceptance and timely pouring of concrete after the construction party, the contractor, the supervision or the first party unit are inspected to be qualified; then hoisting the middle section steel column 122 and performing concrete construction; finally, the upper section steel column 123 is hoisted.
As shown in fig. 1, the lower section cross-shaped steel skeleton 11 and the special-shaped steel column 12 have obvious difference in structure, so that the lower section cross-shaped steel skeleton 11 is divided, the manufacture of the lower section cross-shaped steel skeleton 11 is facilitated, and the manufacture time is saved; the independent manufacturing of the special-shaped steel column 12 is also facilitated; wherein, the lower section cross-shaped steel skeleton 11 is welded and assembled by rectangular steel plates, and is easy to manufacture at one time; meanwhile, the lower section cross-shaped steel skeleton 11 is used as a bottom layer supporting column, the functions are the same, the same pegs 51 are arranged on the surface of the lower section cross-shaped steel skeleton, and a concrete layer is covered on the lower section cross-shaped steel skeleton; the steel column bracket 121 needs to be pre-buried on a floor slab and is integrated with a horizontal floor slab, the middle section steel column 122 is used as a middle layer of the special-shaped steel column 12 and is also a main supporting piece of the special-shaped steel column 12, and a concrete layer needs to be poured.
Further, as shown in fig. 4 to 6, since the main functions of the steel column brackets 121, the middle section steel column 122 and the upper section steel column 123 are different, resulting in different structures, the present embodiment further finely divides them according to the different structures, thereby facilitating the manufacture.
Step S4: building a temporary support frame and hoisting an arc-shaped square box-shaped steel column 13; as shown in fig. 7, the arc-shaped tetragonal box steel post 13 has larger size, longer span and heavier weight; only one piece can be hoisted at a time, four times of hoisting are needed to complete the hoisting, and auxiliary support is needed during assembly; specifically, a temporary supporting frame for temporarily supporting the arc-shaped quadrangular box-shaped steel columns 13 is built around the special-shaped steel columns 12; the bottom of the arc-shaped quadrangular box steel column 13 is fixedly connected with the special-shaped steel column 12 by welding; still further, rely on interim support frame as auxiliary stay during hoist and mount, interim support frame includes the H shaped steel mesa at arc four corners box shaped steel post 13 lower part and welds the many circular steel pipes on H shaped steel mesa, circular steel pipe upper portion then welds on arc four corners box shaped steel post 13, and as the interim support in middle part, accomplishes the hoist and mount of four arc four corners box shaped steel posts 13, arc four corners box shaped steel post 13 bottom and upper segment steel post 123 carry out welded fastening connection.
Step S5: hoisting the central steel column 14; welding the bottom of the central steel column 14 with the middle position of the special-shaped steel column 12; and the inner horizontal cross rod 2 and the arc-shaped square box-shaped steel column 13 are welded and fixed;
the step S5 further includes: the central steel column 14 comprises a lower section central box steel column 141, a third steel casting 142, an upper section central box steel column 143 and a first steel casting 144; firstly, a lower section central box-type steel column 141 is hoisted, and the middle position of the lower section central box-type steel column 141 and the middle position of an upper section steel column 123 are fixedly connected by welding; the side surface is welded and fixed with the arc-shaped square box-shaped steel column 13 through the internal horizontal cross rod 2; secondly, hoisting a third steel casting 142, wherein the third steel casting 142 is welded with the lower section central box steel column 141; the side surface is welded and fixed with the arc-shaped square box-shaped steel column 13 through the internal horizontal cross rod 2; hoisting the upper section of the central box steel column 143 again, and welding the upper section of the central box steel column 143 and the third steel casting 142; finally, hoisting a first steel casting 144, wherein the first steel casting 144 is welded with the upper section central box steel column 143; thereby completing the lifting and welding of the entire center steel column 14.
The central steel column 14 is divided into four sections, namely a lower section central box steel column 141, a third steel casting 142, an upper section central box steel column 143 and a first steel casting 144; the purpose of dividing into four sections is to facilitate transportation and manufacture, split the sections from the structure, so that the central steel column 14 is manufactured faster and has transportation conditions, the lower section central box steel column 141 and the upper section central box steel column 143 are hollow vertical square tubes, plates can be used for welding and forming respectively, the third steel casting 142 and the first steel casting 144 are complex in structure, and casting processing and one-time processing and forming are adopted; so in the manufacture of the center steel column 14, division into four segments is the optimal choice under the current construction, process and transportation conditions.
Step S6: hoisting an external horizontal cross bar 3; the arc-shaped four-corner box steel columns 13 are connected through a plurality of layers of external horizontal cross bars 3;
as shown in fig. 2, the outer horizontal cross rod 3 is hoisted, the outer horizontal cross rod 3 is a member connected with the arc-shaped square box steel column 13 and is divided into 8 outer horizontal cross rod 3 connecting pieces in an upper layer and a lower layer, and after the central steel column 14 is hoisted, the outer horizontal cross rod 3 connecting pieces are hoisted in time so as to ensure the overall stability of the arc-shaped square box steel column 13; and the outer horizontal cross rod 3 is hoisted from bottom to top by using a crawler crane, and is installed and welded from bottom to top in the vertical direction.
Step S7: as shown in fig. 10, the second steel casting 15 is hoisted; and hoisting the second steel casting 15 to the top of the arc-shaped tetragonal box-shaped steel column 13 for welding, and welding and fixing the second steel casting with the central steel column 14 through the inclined cross rod 4.
The step S6 further includes: the structure assembly of the second steel casting 15 is carried out on the ground, after the assembly of the second steel casting 15 is completed, the second steel casting 15 is slowly lifted to the top of the arc-shaped quadrangular box-shaped steel column 13 by utilizing a crawler crane, the second steel casting is welded and fixed with the top of the arc-shaped quadrangular box-shaped steel column 13 by manually assisting in calibration and positioning, and the second steel casting 15 construction is completed by welding and fixing the second steel casting with the third steel casting 142 through the inclined cross rod 4.
The above examples are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above examples, and any other changes, modifications, substitutions, combinations, and simplifications that do not depart from the spirit and principle of the present invention should be made in the equivalent manner, and the embodiments are included in the protection scope of the present invention.
Claims (9)
1. A large-scale flower-shaped special-shaped steel column sectional assembly construction method for a high-speed rail station is characterized by comprising the following steps of: the method comprises the following steps:
step S1: the large-sized flowering special-shaped steel column (1) is prefabricated in a segmented mode and is divided into a lower section cross-shaped steel skeleton (11), a special-shaped steel column (12), an arc-shaped quadrangle box-shaped steel column (13), a central steel column (14) and a second steel casting (15);
step S2: installing a lower section cross-shaped steel skeleton (11); embedding column leg bolts (53) according to the installation positions, installing corresponding mother boards (52) on the column leg bolts (53), welding the mother boards (52) and the lower section cross-shaped steel framework (11) into a whole, and pouring concrete of a bearing platform around the lower section cross-shaped steel framework (11);
step S3: hoisting a special-shaped steel column (12); fixedly screwing the special-shaped steel column (12) and the bearing platform embedded part at the bottom, and then pouring concrete in time;
step S4: building a temporary support frame and hoisting an arc-shaped square box-shaped steel column (13); constructing a temporary support frame for temporarily supporting the arc-shaped quadrangular box-shaped steel columns (13) around the special-shaped steel columns (12); the bottoms of the arc-shaped quadrangular box steel columns (13) are fixedly connected with the special-shaped steel columns (12) in a welding way;
step S5: hoisting a central steel column (14); welding the bottom of the central steel column (14) with the middle position of the special-shaped steel column (12); and the inner horizontal cross rod (2) and the arc-shaped square box steel column (13) are welded and fixed;
step S6: hoisting an external horizontal cross bar (3); the arc-shaped quadrangle box-shaped steel columns (13) are connected through a plurality of layers of external horizontal cross bars (3);
step S7: hoisting a second steel casting (15); and welding a second steel casting (15) on the top of the arc-shaped quadrangle box-type steel column (13), and welding and fixing the second steel casting with the central steel column (14) through the inclined cross rod (4).
2. The method for sectionally assembling and constructing the huge bloom-shaped special-shaped steel column for the high-speed rail station, which is disclosed in claim 1, is characterized in that: the surface of the lower section cross-shaped steel skeleton (11) is provided with pegs (51) connected with concrete, the lower section cross-shaped steel skeleton (11) is formed by assembling and welding a plurality of steel plates, each steel plate is numbered before processing, the welding sequence of each steel plate and the position of a welding seam are reasonably arranged, and polishing and leveling are performed after welding is completed.
3. The method for sectionally assembling and constructing the huge bloom-shaped special-shaped steel column for the high-speed rail station, which is disclosed in claim 1, is characterized in that: the step S2 further includes: embedding column base bolts (53) according to the installation positions, installing corresponding mother boards (52) on the column base bolts (53), and screwing up and down one nut on each column base bolt (53) to clamp the mother boards (52); the distance between the end part of the column foot bolt (53) and the motherboard (52) is adjusted according to the actual installation height, and coarse positioning is carried out according to the pre-buried steel bar head and the installation height on the foundation cushion layer originally; a theodolite is respectively arranged on the longitudinal axis and the transverse axis, a level gauge is arranged at a place which is close to the installation site and convenient to install, the correction axis of the theodolite is correspondingly overlapped with the axis marked on the motherboard, and three instruments are used for simultaneously comparing the embedded bolts; after repeated comparison and inspection, checking the levelness of the motherboard by using a leveling ruler after confirming the axis and the elevation of the embedded bolt, checking the verticality of the bolt by using a plumb bob, and connecting and welding the embedded column foot bolt (53) with the steel bar which is originally embedded on the cushion layer at an angle of 45-60 degrees by using the steel bar after the verticality of the bolt is correct.
4. The method for sectionally assembling and constructing the huge bloom-shaped special-shaped steel column for the high-speed rail station, which is disclosed in claim 1, is characterized in that: the special-shaped steel column (12) comprises a steel column bracket (121), a middle section steel column (122) and an upper section steel column (123) from bottom to top; and the surfaces of the steel column bracket (121) and the middle section steel column (122) are provided with pegs (51) connected with concrete.
5. The method for sectionally assembling and constructing the huge bloom-shaped special-shaped steel column for the high-speed rail station, which is disclosed by claim 4, is characterized in that: the step S3 further includes: after the bearing platform concrete reaches the strength required by design, hoisting by using a crane prepared in advance, fixedly connecting the manually-assisted steel column bracket (121) with a bearing platform embedded part at the bottom, simultaneously screwing the embedded anchor bolt, simultaneously calibrating and positioning the steel column bracket (121), and screwing the embedded anchor bolt after the height, the levelness and the verticality of the steel column bracket (121) meet the design requirement; then carrying out hidden acceptance and timely pouring concrete; hoisting the middle section steel column (122) and performing concrete construction; and finally, hoisting the upper section steel column (123).
6. The method for sectionally assembling and constructing the huge bloom-shaped special-shaped steel column for the high-speed rail station, which is disclosed by claim 4, is characterized in that: the step S4 further includes: the arc four-corner box steel column (13) is large in size, the arc four-corner box steel column (13) is hoisted by using the crane for many times, the temporary support frame is used as an auxiliary support during hoisting, the temporary support frame comprises an H-shaped steel table surface at the lower part of the arc four-corner box steel column (13) and a plurality of round steel pipes welded on the H-shaped steel table surface, the upper part of the round steel pipe is welded on the arc four-corner box steel column (13) and used as a temporary support in the middle part, the hoisting of the four arc four-corner box steel columns (13) is completed, and the bottom of the arc four-corner box steel column (13) is fixedly connected with the upper section steel column (123) through welding.
7. The method for sectionally assembling and constructing the huge bloom-shaped special-shaped steel column for the high-speed rail station, which is disclosed by claim 4, is characterized in that: the step S5 further includes: the central steel column (14) comprises a lower section central box steel column (141), a third steel casting (142), an upper section central box steel column (143) and a first steel casting (144); firstly, a lower section central box steel column (141) is hoisted, and the lower section central box steel column (141) is fixedly connected with the middle position of an upper section steel column (123) by welding; the side surface is welded and fixed with the arc-shaped square box-shaped steel column (13) through the internal horizontal cross rod (2); secondly, hoisting a third steel casting (142), wherein the third steel casting (142) is welded with the lower section central box steel column (141); the side surface is welded and fixed with the arc-shaped square box-shaped steel column (13) through the internal horizontal cross rod (2); hoisting the upper section central box steel column (143) again, and welding the upper section central box steel column (143) and the third steel casting (142); finally, hoisting a first steel casting (144), wherein the first steel casting (144) is welded with the upper section central box steel column (143); thereby completing the hoisting and welding of the whole central steel column (14).
8. The method for sectionally assembling and constructing the huge bloom-shaped special-shaped steel column for the high-speed rail station, which is disclosed in claim 1, is characterized in that: the step S6 further includes: hoisting the outer horizontal cross rod (3), wherein the outer horizontal cross rod (3) is a member connected with the arc-shaped square box steel column (13) and is divided into 8 outer horizontal cross rod (3) connecting pieces in total of upper and lower 2 layers, and after the hoisting of the central steel column (14) is completed, the outer horizontal cross rod (3) connecting pieces are hoisted in time so as to ensure the overall stability of the arc-shaped square box steel column (13); and (3) hoisting the external horizontal cross rod (3) from bottom to top by using the crawler crane, and performing installation welding from bottom to top in the vertical direction.
9. The method for sectionally assembling and constructing the huge bloom-shaped special-shaped steel column for the high-speed rail station, which is disclosed by claim 7, is characterized in that: the step S7 further includes: the second steel casting (15) is assembled on the ground, after the second steel casting (15) is assembled, the second steel casting (15) is slowly lifted to the top of the arc-shaped square box steel column (13) by using the crawler crane, and is welded and fixed with the top of the arc-shaped square box steel column (13) by manual assistance and calibration positioning, and the second steel casting (15) construction is completed by welding and fixing the second steel casting (15) with the third steel casting (142) through the inclined cross rod (4).
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