CN115045560A - Pre-assembly method of special-shaped high-rise steel structure - Google Patents
Pre-assembly method of special-shaped high-rise steel structure Download PDFInfo
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- CN115045560A CN115045560A CN202210715999.2A CN202210715999A CN115045560A CN 115045560 A CN115045560 A CN 115045560A CN 202210715999 A CN202210715999 A CN 202210715999A CN 115045560 A CN115045560 A CN 115045560A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 51
- 239000010959 steel Substances 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000000638 solvent extraction Methods 0.000 claims abstract description 4
- 238000003466 welding Methods 0.000 claims description 28
- 239000012535 impurity Substances 0.000 claims 1
- 238000010276 construction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
- E04H12/10—Truss-like structures
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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
- E04G21/16—Tools or apparatus
- E04G21/18—Adjusting tools; Templates
- E04G21/1841—Means for positioning building parts or elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/34—Arrangements for erecting or lowering towers, masts, poles, chimney stacks, or the like
Abstract
The invention discloses a pre-assembly method of a special-shaped towering steel structure, which comprises the following steps: partitioning the special-shaped high-rise steel structure to be built according to the structural characteristics, and segmenting the structure of each region according to the factory assembly environment; then, each segmented structure is circularly pre-assembled; the splicing method comprises the steps that an error adjusting control point is arranged at the splicing connection position, and splicing errors are eliminated by adjusting the error adjusting control point in the pre-splicing process, so that the splicing is accurate. When the method is applied, the pre-assembly work of the special-shaped high-rise steel structure is completed under the limited pre-assembly field, and the assembly precision is improved by arranging the error adjusting control points at the assembly connection positions to eliminate the assembly error.
Description
Technical Field
The invention relates to the field of steel structure building construction, in particular to a pre-assembly method of a special-shaped high-rise steel structure.
Background
In tower mast type buildings, steel structure structures are widely applied, and the tower mast type building has the advantages of good structural stress, light structure dead weight, short construction period, simple and convenient high-altitude operation and the like. With the gradual maturity of the construction technology of tower mast type buildings, a large number of power transmission towers, communication towers, television towers, wind power generation towers and the like are built every year.
Due to the limitation of transportation and on-site construction machinery, tower mast buildings need to be manufactured into single structural parts in a processing plant, are pre-assembled in the factory to ensure on-site construction precision, and are transported to the site for high-altitude assembly. In the prior art, the structure of the special-shaped high-rise steel structure is complex, the size change of the section in the height direction is large, the space connecting nodes of the structural part are more, and meanwhile, the pre-assembly field of a factory is limited, so how to complete the pre-assembly work of the complex special-shaped high-rise steel structure in the limited field and ensure the matching precision of components is a great difficulty in the pre-assembly of the engineering.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a pre-assembly method of a special-shaped high-rise steel structure, which can ensure assembly precision.
The pre-assembling method of the special-shaped towering steel structure comprises the following steps:
partitioning the special-shaped high-rise steel structure to be built according to the structural characteristics, and segmenting the structure of each region according to the factory assembly environment;
then, each segmented structure is circularly pre-assembled;
the splicing method comprises the steps that an error adjusting control point is arranged at the splicing connection position, and splicing errors are eliminated by adjusting the error adjusting control point in the pre-splicing process, so that the splicing is accurate.
The pre-assembling method of the special-shaped towering steel structure provided by the embodiment of the invention at least has the following beneficial effects:
when the method is applied, the pre-assembly work of the special-shaped high-rise steel structure is completed under the condition of limited factory site, the assembly precision is improved by arranging the error adjusting control point at the assembly connection position to eliminate the assembly error, and the efficiency of the special-shaped high-rise steel structure in the actual assembly process on site can be improved.
According to some embodiments of the invention, the columns of the special-shaped high-rise steel structure are connected with each other in the length direction through the flange plates, wherein error adjustment control points are arranged for the connection between the columns of the inclined segmented structure: selecting a flange plate at the top and/or the bottom of the middle section to be intermittently welded with the column; and during pre-assembly, if assembly errors occur, opening the welding seams for intermittent welding and adjusting the positions of the columns, and after the errors are eliminated, completely and firmly welding the flange plates on the columns.
According to some embodiments of the invention, a beam is arranged between the columns of the special-shaped high-rise steel structure, and error adjusting control points are arranged between two ends of the beam and the columns: set up the bracket branch pipe in the side of post, the bracket branch pipe with the tip of crossbeam all is equipped with T template, two pass through bolted connection behind the T template back-off, during the disconnected welding between bracket branch pipe and post, in the time of assembling in advance, if produce and assemble the error, open and be interrupted welded welding seam and adjustment the position of bracket branch pipe eliminates the error after, will bracket branch pipe welds firmly on the post completely.
According to some embodiments of the invention, a diagonal rod is arranged between the columns of the special-shaped high-rise steel structure, and error adjusting control points are arranged between two ends of the diagonal rod and the columns: set up the connecting plate in the side of post, the tip of down tube is equipped with the U template, pass through bolted connection after U template and the connecting plate cooperation, the welding is interrupted with the post to the connecting plate, when assembling in advance, if produce and assemble the error, open and be interrupted welded welding seam and adjust the position of connecting plate, after eliminating the error, will the connecting plate welds firmly on the post completely.
According to some embodiments of the invention, horizontal pre-assembly or vertical pre-assembly is used for different segmental structures according to the characteristics of the structures.
According to some embodiments of the invention, a first platform plate is prepared as a bottom support before horizontal pre-assembly, and ground sundries are cleaned before the first platform plate is laid; then, according to the drawing, a ground sample is placed on the first platform plate through a total station, and the horizontal jig frame is installed on the first platform plate according to the ground sample.
According to some embodiments of the invention, the level of the horizontal jig is checked by using a level meter and adjusted to a design requirement value; and preparing a plurality of adjusting gaskets for adjusting the deformation of the horizontal jig frame caused by bearing.
According to some embodiments of the invention, before vertical pre-assembly, a pre-assembly field is cleaned, then a center position is determined on a hardening field, ground sample lines are radially placed by taking the center position as a center according to a drawing and the positions of bottom pillars are determined, then a second platform plate is placed at each bottom pillar position, and finally the vertical jig is placed on each second platform plate.
According to some embodiments of the invention, a plurality of ground anchor plates are arranged between two adjacent second platform plates, and a support lath is arranged to connect the second platform plates and the ground anchor plates.
According to some embodiments of the invention, the bottom pillar is placed on the vertical jig frame when vertical pre-assembling is performed; three pull anchors are arranged between the bottom column and the ground anchor plate, wherein two pull anchors are arranged on the outer side of the bottom column relative to the central position, and the other pull anchor is positioned on the inner side of the bottom column; and after the cross beam and the inclined rod between the bottom columns are erected, the pull anchor on the inner side of the bottom column is removed.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The invention is further described with reference to the following figures and examples, in which:
fig. 1 is a schematic overall structure diagram of a construction example of a special-shaped high-rise steel structure according to an embodiment of the invention;
fig. 2 is an axonometric view of the outer frame structure after horizontal pre-assembly of the engineering example of the special-shaped high-rise steel structure according to the embodiment of the invention;
fig. 3 is an axonometric view after horizontal pre-assembly of a tower-well structure of an engineering example of the special-shaped high-rise steel structure of the embodiment of the invention is completed;
fig. 4 is an axonometric view after horizontal pre-assembly of an elevator shaft structure of an engineering example of a special-shaped high-rise steel structure of one embodiment of the invention is completed;
fig. 5 is a schematic diagram of an engineering example of a pre-assembly method of a special-shaped high-rise steel structure according to an embodiment of the invention when a tower well column is pre-assembled;
fig. 6 is a schematic view of a vertical jig frame of a pre-assembling method for a special-shaped towering steel structure according to an embodiment of the invention;
fig. 7 is a schematic structural view of an outer frame column of an engineering example of a pre-assembly method of a special-shaped high-rise steel structure according to an embodiment of the present invention;
fig. 8 is a schematic structural view of an outer frame beam of an engineering example of a pre-assembly method of a special-shaped high-rise steel structure according to an embodiment of the invention;
fig. 9 is a partially enlarged view of an outer frame structure of an engineering example of a pre-assembling method of a special-shaped towering steel structure according to an embodiment of the present invention;
reference numerals:
110. an outer frame; 111. an outer frame column; 112. an outer frame beam; 113. an outer frame diagonal rod; 114. a flange plate; 115. a bracket branch pipe; 116. a T-shaped plate; 117. a connecting plate; 118. a U-shaped plate;
120. a tower well; 121. a tower well column; 122. a tower shaft diagonal rod; 123. a tower shaft beam; 124. a second platen; 125. a circular tube; 126. a ground anchor plate; 127. a support panel; 128. pulling an anchor;
130. an elevator shaft; 131. an elevator shaft column; 132. an elevator shaft cross beam; 133. an elevator shaft diagonal rod;
140. a decorative ball;
150. and an antenna segment.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, etc., is indicated based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, a plurality means two or more. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
The invention discloses a pre-assembling method of a special-shaped towering steel structure, which comprises the following steps of:
partitioning the special-shaped high-rise steel structure to be built according to the structural characteristics, and segmenting the structure of each region according to the factory assembly environment;
then, each segmented structure is circularly pre-assembled;
the splicing method comprises the steps that an error adjusting control point is arranged at the splicing connection position, and splicing errors are eliminated by adjusting the error adjusting control point in the pre-splicing process, so that the splicing is accurate.
When the method is applied, the pre-assembly work of the special-shaped high-rise steel structure is completed under the condition of limited factory site, the assembly precision is improved by arranging the error adjusting control point at the assembly connection position to eliminate the assembly error, and the efficiency of the special-shaped high-rise steel structure in the actual assembly process on site can be improved.
It can be understood that the columns of the special-shaped high-rise steel structure are connected with each other in the length direction through the flange plate 114, wherein error adjustment control points are arranged for the connection between the columns of the inclined segmented structure: selecting a flange plate 114 at the top and/or the bottom of the middle section to be welded with the rest column sections at intervals; during pre-assembly, if assembly errors occur, the welding seams of intermittent welding are opened, the position of the column is adjusted, and after the errors are eliminated, the flange plate 114 is completely and firmly welded on the column.
It can be understood that a beam is arranged between the columns of the special-shaped high-rise steel structure, and error adjusting control points are arranged between the two ends of the beam and the columns: the side of the column is provided with a bracket branch pipe 115, the end parts of the bracket branch pipe 115 and the beam are provided with T-shaped plates 116, the two T-shaped plates 116 are connected through bolts after being reversely buckled, the bracket branch pipe 115 and the column are welded intermittently, during pre-assembly, if assembly errors occur, intermittently welded welding seams are opened, the position of the bracket branch pipe 115 is adjusted, and after the errors are eliminated, the bracket branch pipe 115 is completely welded and fixed on the column.
It can be understood that the inclined rod is arranged between the columns of the special-shaped high-rise steel structure, and the error adjusting control points are arranged between the two ends of the inclined rod and the columns: the side of the column is provided with a connecting plate 117, the end part of the diagonal rod is provided with a U-shaped plate 118, the U-shaped plate 118 is matched with the connecting plate 117 and then connected through a bolt, the connecting plate 117 and the column are welded intermittently, during pre-assembly, if assembly errors occur, welding seams of intermittent welding are opened, the position of the bracket branch pipe 115 is adjusted, and after the errors are eliminated, the connecting plate 117 is completely welded on the column firmly.
It can be understood that different segmental structures are horizontally pre-assembled or vertically pre-assembled according to the characteristics of the structures. In order to ensure the precision matching between the components of different batches during the field construction, the components of different batches need to be circularly pre-assembled. The principle is as follows: when the vertical pre-assembly is carried out, the uppermost column section in the previous round is used as the lowermost column section in the next round, and the circular pre-assembly is carried out. When horizontal pre-assembly is carried out, the column finished in the previous round is used as the starting column in the next round, and circular pre-assembly is carried out.
It can be understood that before horizontal pre-assembly, the first platform plate is prepared as a bottom support, and the ground sundries are cleaned before the first platform plate is laid; then, according to the drawing, a ground sample is placed on the first platform plate by using a total station, and the horizontal jig is installed on the first platform plate according to the ground sample.
It can be understood that the level gauge is adopted to check the elevation of the horizontal jig frame and adjust the elevation to a value required by the design; a plurality of adjusting gaskets are prepared for adjusting the deformation of the horizontal jig frame caused by bearing.
Sufficient rigidity must be guaranteed when the horizontal jig frame is arranged, after the pre-assembly of each batch is finished, the horizontal jig frame can be adjusted according to the horizontal jig frame drawing of the next batch and then recycled, so that the jig frame measure material investment is less, and the economy is better.
It can be understood that, before the vertical pre-assembly, the pre-assembly field is cleaned, then the center position is determined on the hardening field, then ground lines are radially arranged by taking the center position as the center according to the drawing and the positions of the bottom pillars are determined, then the second flat bed plate 124 is arranged at each position of the bottom pillars, and finally the vertical jig frame is arranged on each second flat bed plate 124.
It can be understood that the vertical jig frame includes a circular tube 125 disposed on the second platen 124, the cross section of the circular tube 125 is not smaller than that of the bottom pillar, a flange is disposed on the circular tube 125, the flange and the circular tube 125 should be fully welded, and the weld leg is not smaller than hf 10.
It will be appreciated that a support shell section may also be provided on the inside of the bottom pillar, in cooperation with the tie anchor 128 to provide a secure mounting of the bottom pillar.
It will be appreciated that, with reference to fig. 6, a plurality of ground anchor plates 126 are provided between adjacent second platform plates 124, and support bars 127 are provided to connect second platform plates 124 with ground anchor plates 126.
It can be understood that, referring to fig. 5, when vertical pre-assembly is performed, a bottom column is placed on the vertical jig frame; three tie-anchors 128 are arranged between the bottom pillar and the ground anchor plate 126, wherein two tie-anchors 128 are arranged at the outer side of the bottom pillar relative to the central position, and the other tie-anchor 128 is arranged at the inner side of the bottom pillar; temporary lugs may be welded to the sides of the bottom pillar to secure the tie anchor 128. The tie-down anchors 128 inside the bottom posts are removed after the cross-beam and diagonal members between the bottom posts are erected.
And then continuously assembling the tower mast structure on the upper layer of the bottom column, the anchor 128 needs to be pulled on the second layer, after the second layer is built, the anchor 128 on the outer side of the bottom column can be detached, but the anchor 128 needs to be pulled again for fixing during subsequent unloading. After the third layer is built, the second layer of tie anchors 128 must not be removed to ensure overall stability.
Next, a method for pre-assembling the special-shaped high-rise steel structure according to the present invention will be described in an engineering example, and as shown in fig. 1, the special-shaped high-rise steel structure includes an outer frame 110, a tower shaft 120, an elevator shaft 130, a decorative ball 140, and an antenna section 150. The decoration ball 140 and the antenna section 150 do not need to be assembled, the outer frame 110 and the elevator shaft 130 are horizontally pre-assembled, and the intersection position of the tower well 120, the tower well 120 and the outer frame 110 is vertically pre-assembled.
Referring to fig. 1 and 2, the outer frame 110 includes four lattice trusses, each of which includes four outer frame columns 111, a plurality of outer frame beams 112, and a plurality of outer frame diagonal rods 113; the length of the single outer frame column 111 is about 8m, and the total height of the outer frame 110 after the first section of outer frame column 111, the second section of outer frame column 111 and the third section of outer frame column 111 are spliced from bottom to top meets the welding condition, so that the first section of outer frame column 111, the second section of outer frame column 111 and the third section of outer frame column 111 of the outer frame 110 do not participate in pre-splicing, and a direct welding connection mode is adopted. Due to the field limitation, in the embodiment, the horizontal splicing length is controlled to be 40-45 meters, and each section of the outer frame column 111 is about 8m in the embodiment, so that every 5 sections are taken as a pre-splicing turn, the pre-splicing turn is a fourth section of the outer frame column 111-an eighth section of the outer frame column 111, and a eighth section of the outer frame column 111-a twelfth section of the outer frame column 111, and so on until the pre-splicing of the last section of the outer frame column 111 is completed.
The outer frame columns 111 adjacent to each other in the length direction are connected through the flange 114, and the outer frame columns 111 have slopes, so that error adjustment control points are provided, for example, when the eighth to twelfth outer frame columns 111 are pre-assembled, the column top flange 114 of the outer frame column 111 in the middle section can be selected as the error adjustment control points, namely, the flange 114 of the column top of the tenth outer frame column 111 and the tenth outer frame column 111 are welded discontinuously, in the embodiment, welding is performed discontinuously by 100mm, when the pre-assembled column is subjected to assembly errors, if the assembly errors occur, the welding seams for the intermittent welding can be opened to adjust the position of the tenth outer frame column 111, the errors are eliminated, and after the errors are eliminated, the flanges 114 are completely welded and firmly.
Referring to fig. 2, 7 and 9, enclosing the outer frame columns 111 into a tower mast structure requires arranging an outer frame beam 112 between adjacent outer frame columns 111, and error adjustment control points are also arranged between two ends of the outer frame beam 112 and the outer frame columns 111: the side of the outer frame column 111 is provided with bracket branch pipes 115, the bracket branch pipes 115 are welded with the outer frame column 111 at intervals of 100mm, the end parts of the bracket branch pipes 115 and the outer frame beam 112 are provided with T-shaped plates 116, and the two T-shaped plates 116 are connected through bolts after being reversely buckled. During pre-assembly, if assembly errors occur, the welding seams which are welded discontinuously are opened, the position of the bracket branch pipe 115 is adjusted, and after the errors are eliminated, the bracket branch pipe 115 is completely and firmly welded on the outer frame column 111.
Referring to fig. 8, in order to make the outer frame 110 more integral and structurally stable, outer frame diagonal members 113 are provided between adjacent outer frame columns 111. Error adjustment control points are arranged between the two ends of the outer frame diagonal rod 113 and the outer frame column 111: the side surface of the outer frame column 111 is provided with a connecting plate 117, the end part of the outer frame diagonal rod 113 is provided with a U-shaped plate 118, the U-shaped plate 118 is matched with the connecting plate 117 and then is connected with the connecting plate 117 through a bolt, the connecting plate 117 and the outer frame column 111 are welded at intervals of 100mm, when the pre-assembly is carried out, if an assembly error is generated, a welding seam which is welded at intervals is opened, the position of the connecting plate 117 is adjusted, and after the error is eliminated, the connecting plate 117 is completely and firmly welded on the outer frame column 111.
Referring to fig. 3, the tower shaft 120 includes eight tower shaft columns 121, a plurality of tower shaft diagonal rods 122, and a plurality of tower shaft beams 123. The tower shaft 120 is vertically pre-assembled, the vertical assembly height is controlled within 25 meters, each tower shaft column 121 is about 8m, and the partial tower shaft columns 121 are segmented into 12 meters, so that 3 sections of the tower shaft columns 121 with the segments of 8 meters are used as a pre-assembly round, and 2 sections of the tower shaft columns with the segments of 12 meters are used as a pre-assembly round when 12 meters of columns are met. Taking the tower well column 121 with the length of 8 meters as an example, since the first section of the tower well 120 is a pre-embedded column embedded with concrete, pre-assembly is not needed, and therefore, the pre-assembly turns are from the second section of the tower well column 121 to the fourth section of the tower well column 121, from the fourth section of the tower well column 121 to the sixth section of the tower well column 121, and so on until the last section of the tower well column 121.
Two adjacent tower shaft columns 121 are connected by a flange plate 114, and the tower shaft columns 121 have no inclination, so that error adjustment control points for connecting the columns do not need to be arranged. The tower well column 121 needs to be provided with a tower well beam 123 between adjacent tower well columns 121 to surround a tower mast structure, and error adjustment control points are also arranged between two ends of the tower well beam 123 and the tower well columns 121: and a tower well beam 123 connecting plate 117 is arranged on the side surface of the tower well column 121, and the tower well beam 123 connecting plate 117 is welded with the tower well column 121 discontinuously by 100 mm. During pre-assembly, if assembly errors occur, the welding seams which are welded discontinuously are opened, the position of the tower well cross beam 123 connecting plate 117 is adjusted, and after the errors are eliminated, the tower well cross beam 123 connecting plate 117 is completely and firmly welded on the tower well column 121. Error adjustment control points are arranged between the two ends of the tower well inclined rod 122 and the outer frame column 111: the side surface of the tower well column 121 is provided with a tower well diagonal rod 122 connecting plate 117, the tower well diagonal rod 122 connecting plate 117 and the tower well column 121 are welded at intervals of 100mm, when pre-assembly is carried out, if assembly errors occur, welding seams which are welded at intervals are opened, the position of the tower well diagonal rod 122 connecting plate 117 is adjusted, and after the errors are eliminated, the tower well diagonal rod 122 connecting plate 117 is completely welded and fixed on the tower well column 121.
Referring to fig. 4, the elevator shaft 130 includes four elevator shaft columns 131, a plurality of shaft beams 132, and a plurality of shaft struts 133. The elevator shaft column 131 is vertically pre-assembled, and the assembling method is similar to that of the tower shaft column 121, and is not described herein. The two elevator shaft columns 131 which are adjacent up and down are connected by the flange 114, and because the elevator shaft columns 131 have no inclination, error adjustment control points for connecting the columns do not need to be arranged. The cross bars and the inclined bars of the elevator shaft 130 are also provided with error adjusting control points, the arrangement mode is similar to that of the elevator shaft 130, and the description is omitted here.
In addition, for the precision control of the hole group of the bolt connection node, the bolt diameter is 2mm smaller than the bolt hole due to the installation requirement of the bolt. In the pre-assembly process, 2mm can result in hole group errors. It is therefore necessary to machine pins for positioning, in relation to the size of the bolt holes. The size of the pin is 1mm smaller than that of the bolt hole, and clearance fit is adopted. During pre-assembly, a mode that one half is positioned by using pins and the other half is fixed by using bolts is adopted, the precision of the hole group connected by the bolts is controlled, and pre-assembly errors are eliminated.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The pre-assembling method of the special-shaped towering steel structure is characterized by comprising the following steps of:
partitioning the special-shaped high-rise steel structure to be built according to the structural characteristics, and segmenting the structure of each region according to the factory assembly environment;
then, each segmented structure is circularly pre-assembled;
the splicing method comprises the steps that an error adjusting control point is arranged at the splicing connection position, and splicing errors are eliminated by adjusting the error adjusting control point in the pre-splicing process, so that the splicing is accurate.
2. The pre-assembling method for the special-shaped high-rise steel structure according to claim 1, wherein the columns of the special-shaped high-rise steel structure are connected in the length direction through flanges, and error adjustment control points are arranged for the connection between the columns of the inclined segmented structure: selecting a flange plate at the top and/or the bottom of the middle section to be intermittently welded with the column; and during pre-assembly, if assembly errors occur, opening the welding seams for intermittent welding and adjusting the positions of the columns, and after the errors are eliminated, completely and firmly welding the flange plates on the columns.
3. The pre-assembling method for the special-shaped high-rise steel structure according to claim 1, wherein a beam is arranged between columns of the special-shaped high-rise steel structure, and error adjusting control points are arranged between two ends of the beam and the columns: set up the bracket branch pipe in the side of post, the bracket branch pipe with the tip of crossbeam all is equipped with T template, two pass through bolted connection behind the T template back-off, during the disconnected welding between bracket branch pipe and post, in the time of assembling in advance, if produce and assemble the error, open and be interrupted welded welding seam and adjustment the position of bracket branch pipe eliminates the error after, will bracket branch pipe welds firmly on the post completely.
4. The pre-assembling method for the special-shaped high-rise steel structure according to claim 1, wherein a diagonal bar is arranged between columns of the special-shaped high-rise steel structure, and error adjusting control points are arranged between two ends of the diagonal bar and the columns: set up the connecting plate in the side of post, the tip of down tube is equipped with the U template, pass through bolted connection after U template and the connecting plate cooperation, the welding is interrupted with the post to the connecting plate, when assembling in advance, if produce and assemble the error, open and be interrupted welded welding seam and adjust the position of connecting plate, after eliminating the error, will the connecting plate welds firmly on the post completely.
5. The pre-assembly method of the special-shaped towering steel structure according to claim 1, wherein horizontal pre-assembly or vertical pre-assembly is adopted for different segmented structures according to the characteristics of the structure.
6. The pre-assembly method of the special-shaped towering steel structure according to claim 5, wherein a first platform plate is prepared as a bottom support before horizontal pre-assembly, and ground impurities are cleaned before the first platform plate is laid; then, according to the drawing, a ground sample is placed on the first platform plate through a total station, and the horizontal jig frame is installed on the first platform plate according to the ground sample.
7. The pre-assembling method for the special-shaped towering steel structure according to claim 6, wherein a level gauge is adopted to check the elevation of the horizontal jig frame and adjust the elevation to a design requirement value; and preparing a plurality of adjusting gaskets for adjusting the deformation of the horizontal jig frame caused by bearing.
8. The pre-assembling method for the special-shaped towering steel structure according to claim 5, wherein before vertical pre-assembling, a pre-assembled field is cleaned, a center position is determined on a hardened field, ground patterns are radially placed with the center position as a center according to a drawing, positions of bottom columns are determined, a second platform plate is placed at each position of the bottom columns, and finally the vertical jig frame is placed on each second platform plate.
9. The method for pre-assembling the special-shaped high-rise steel structure according to claim 8, wherein a plurality of ground anchor plates are arranged between two adjacent second platform plates, and supporting battens are arranged to connect the second platform plates and the ground anchor plates.
10. The pre-assembly method of the special-shaped towering steel structure according to claim 8, wherein the bottom column is placed on the vertical jig frame when vertical pre-assembly is performed; three pull anchors are arranged between the bottom column and the ground anchor plate, wherein two pull anchors are arranged on the outer side of the bottom column relative to the central position, and the other pull anchor is positioned on the inner side of the bottom column; and after the cross beam and the inclined rod between the bottom columns are erected, the pull anchor on the inner side of the bottom column is removed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210715999.2A CN115045560A (en) | 2022-06-23 | 2022-06-23 | Pre-assembly method of special-shaped high-rise steel structure |
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Address after: No.1908, Zhongtian Meijing building, No.2009, Pingshan Avenue, Liulian community, Pingshan street, Pingshan District, Shenzhen, Guangdong 518000 Applicant after: China Construction Steel Structure Co.,Ltd. Address before: No.1908, Zhongtian Meijing building, No.2009, Pingshan Avenue, Liulian community, Pingshan street, Pingshan District, Shenzhen, Guangdong 518000 Applicant before: China Construction Steel Engineering Co.,Ltd. |