CN114775881A - Dome structure hoisting construction method and mounting and connecting structure - Google Patents
Dome structure hoisting construction method and mounting and connecting structure Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 258
- 239000010959 steel Substances 0.000 claims abstract description 258
- 238000000926 separation method Methods 0.000 claims abstract description 81
- 238000009434 installation Methods 0.000 claims abstract description 26
- 210000001503 joint Anatomy 0.000 claims abstract description 18
- 238000005192 partition Methods 0.000 claims abstract description 10
- 238000013461 design Methods 0.000 claims abstract description 7
- 230000002787 reinforcement Effects 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims description 18
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- 238000012937 correction Methods 0.000 claims description 9
- 229910000746 Structural steel Inorganic materials 0.000 claims description 3
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- 238000006073 displacement reaction Methods 0.000 claims description 3
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- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000007779 soft material Substances 0.000 claims description 3
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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
- E04B7/00—Roofs; Roof construction with regard to insulation
- E04B7/08—Vaulted roofs
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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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Abstract
The invention discloses a hoisting construction method and an installation and connection structure of a dome structure, wherein the dome structure comprises an edge-closing truss, a corner unit connected to one side in the edge-closing truss, separation truss belts which are connected to the edge-closing truss in an upward direction and are arranged at intervals, separation units connected between the separation truss belts and an arc-shaped truss connected to the middle part of the edge-closing truss in the longitudinal direction; and supporting steel columns are connected below the dome structure at intervals. According to the invention, the support steel column is combined with the segmentation and the targeted design of the dome structure, so that the lower support is provided for the dome structure; dividing the steel frame dome structure to provide a division and partition basis for later installation and hoisting; the middle arc truss is more beneficial to the use of a middle large-span building space under the condition of meeting the requirement of strengthening the middle stress; the arrangement of the separation units and the separation truss belts is favorable for local reinforcement under the change of the wave curvature; and a truss butt joint gap is reserved, so that the dome structure is favorably and effectively installed and hoisted.
Description
Technical Field
The invention belongs to the technical field of steel structures, and particularly relates to a dome structure hoisting construction method and a mounting and connecting structure.
Background
Along with the development of steel structures, the styles of steel structure buildings are more and more complex, and the connection between steel frames and columns in the steel structures, the design of the steel frames or the combination of the steel frames and other structural forms are increasingly abundant. To the design of architectural forms such as exhibition hall, stadium or art center not only comparatively complicated in the pattern and also can make great improvement and breakthrough in order to guarantee the linear style at the steel construction, when special-shaped dome structure and lower part cylinder are connected, the hoist and mount installation of cylinder need not guarantee the convenient construction of installation of dome structure as well.
Disclosure of Invention
The invention provides a dome structure hoisting construction method and a mounting and connecting structure, which are used for solving the technical problems of hoisting and mounting a dome structure and a supporting steel column, installing the dome structure in a partition and subsection manner, connecting the supporting steel column and the dome structure and the like.
In order to realize the purpose, the invention adopts the following technical scheme:
a dome structure hoisting construction method comprises a side-folding truss, corner units connected to one inner side of the side-folding truss, separating truss belts connected to the side-folding truss in an upward direction at intervals, separating units connected between the separating truss belts and an arc-shaped truss connected to the middle of the side-folding truss in the longitudinal direction; supporting steel columns are connected below the dome structure at intervals;
the dome structure is wavy in the horizontal direction and the vertical direction, the length direction of one side of the dome structure is lower than that of the other side of the dome structure, the vertical projection comprises a sharp corner part on one side and a trapezoidal part on the other side of the dome structure, and the periphery of the trapezoidal part is an arc-shaped edge;
the construction method for hoisting the dome structure comprises the following specific steps:
step one, height division is carried out on a supporting steel column according to the wave shape of a dome structure, and an embedded column base is arranged at the bottom of the supporting steel column and is supported by an angle steel bracket; the supporting steel column is installed from the middle to the two ends
Step two, the installation of the angle steel bracket is required to be carried out in an intervening construction mode when the concrete strength of the pile foundation reaches more than 80%, and the installation sequence is carried out in sequence according to civil engineering subareas; after the civil pile foundation construction is finished, providing a working surface and completing the installation of the angle steel bracket, sequentially and alternately installing first sections of steel columns, and constructing the support steel columns to a position 1.20 meters above the elevation of the top of the bearing platform; the basement support steel column is installed and hoisted by adopting a near tower crane;
step three, fixedly connecting the assembled support steel columns in the same vertical direction, connecting the support steel columns through C-shaped steel plates during butt joint, and performing auxiliary construction through temporary supporting pieces when connecting the upper section support steel columns; the supporting steel columns are arranged corresponding to the column bodies in the dome structure and are connected through temporary fixing plates or fixing frames; the supporting steel columns are arranged in unequal lengths according to the layer height and the lower part structure of the dome structure, and the top of each supporting steel column can be detachably connected with a positioning plate;
step four, when the supporting steel column is constructed to the dome structure, deepening the steel frame dome structure through CAD and three-dimensional software, and dividing the steel frame dome structure into a pure steel frame and a truss for targeted installation construction;
step five, after corresponding steel frames in the corner units and the separation units are installed, temporarily fixing the steel frames, and particularly performing encryption temporary support on the reserved gaps at the belt positions of the separation trusses and the reserved gaps at the arc trusses; fixing the steel frames at the segmented hoisting positions through temporary fixing splints until the subsequent integral steel frame is installed, and welding rigid connection nodes at the splicing positions of the steel frames through full penetration; rechecking the position and the line type of the steel frame;
step six, splicing the edge-closing truss, the arc-shaped truss and the separation truss belt on site; setting an assembling operation frame, carrying out all-dimensional measurement and correction on the total length, the width, the height and the like of the operation frame, then establishing a control grid for the placing position of the truss rod piece, and then starting assembling; measuring and paying off the spatial positions of all points of the rod piece, and arranging a limiting block for placing the rod piece;
step seven, during hoisting, firstly, trial hoisting is carried out, the hoisting is stopped when the hoisting height is 100-200 mm, and the firmness of the rigging and the stability of the crane are checked; after the confirmation of no error, the crane can be instructed to slowly ascend to enable the center of the truss to be aligned with the center of the installation position, then the hook is slowly ascended, and the stable mooring ropes in four directions are manually tensioned in the hoisting process to prevent the truss from laterally shaking;
step eight, hoisting the truss to the position above the cylindrical surface, rotating the truss by using a stable cable to align the truss to the splicing position so as to accurately position the truss, slowly positioning the truss, and accurately positioning the side truss and the secondary truss at the elevation relative to the roof truss beam; thereby completing the installation of the dome structure.
Furthermore, the lifting point is positioned on the connecting lug plate of the top of the supporting steel column, when the column is lifted, the column is lifted and rotates while hooking, so that the column is vertical, the bottom plate of the column is kept 40-60 cm away from the ground, and the crane arm is slowly rotated and falls onto the angle iron bracket;
after the first section of supporting steel column circles to the right, the center lines of the two sides are matched with the marked center line of the angle steel bracket, the four sides are considered, the angle steel bracket anchor bolts are aligned and penetrate into anchor bolt holes at the bottom of the column, and wind-holding ropes are adopted for reinforcement to prevent toppling; correcting the first section of column, measuring the elevation, displacement and vertical deviation of the first section of column for primary correction, then screwing down the anchor bolt nut, then performing secondary correction, and then welding with the angle steel bracket.
Further, in the fourth step, the edge-closing trusses, the corner units, the separation truss belts, the separation units and the arc trusses are subjected to region division synchronous construction; and firstly constructing a pure steel frame part and a truss part in the same area.
Further, in the sixth step, the web members of the truss are placed, positioned and temporarily fixed, and the overall position relation is measured and adjusted according to the upper chord member, the lower chord member and the point position marks on the web members to be spliced; after the components are adjusted and fixed, detecting by using a steel ruler, a plumb bob and the like according to point position marks and ground projection points on the pieces to be spliced, fixing by using spot welding, recording and storing detection data, comparing and analyzing with a design drawing, and adjusting if the components do not meet the requirements; if the requirements are met, performing a welding process and a subsequent process.
Furthermore, a separation top connecting column and a separation steel frame in the separation truss band are both installed together with the angle connecting steel frame and the separation unit inner steel frame, wherein joints corresponding to the separation inner trusses are installed on the separation steel frame in advance; after the angle units and the corresponding steel frames in the separation units are installed, the reserved gaps at the positions of the separation truss belts are encrypted to form temporary supports, the installation operation platform is used for installing the separation inner trusses, and the separation inner trusses are installed from the middle to two sides or are installed together in a regional mode.
Furthermore, when the truss is hoisted, binding points are padded in the truss by using soft materials, and the height difference of the left support and the right support of the truss is adjusted when the steel wire ropes are bound, so that the truss can be stably positioned in place in the hoisting process; binding stable cables at two ends of the truss respectively; welding temporary reinforcing and positioning measures before hoisting;
after the truss is installed, the truss is reinforced and fixed by adopting a cable rope, and after the truss is hoisted in place, the truss needs to be reinforced with the steel beam and a splicing part through a frame butt-joint fixing plate;
the verticality of the steel beam is checked by a theodolite or a total station, the steel beam can be welded after the truss is corrected to be qualified, the truss needs to be welded after being temporarily fixed, and the section bar is a round tube and needs to be provided with a round-corner suspension cage for welding.
Further, the installation and connection structure of the dome structure comprises a steel frame dome structure, wherein the horizontal direction and the vertical direction of the steel frame dome structure are both wavy, the length direction of one side is lower than that of the other side, the vertical projection comprises a sharp corner part on one side and a trapezoidal part on the other side, and the periphery of the trapezoidal part is an arc-shaped edge;
the steel frame dome structure comprises a side folding truss, a corner unit connected to one side in the side folding truss, separation truss belts connected to the upper side of the side folding truss at intervals, separation units connected between the separation truss belts, and an arc truss connected to the middle of the side folding truss in length.
The edge-closing truss is arranged at the periphery of the steel frame dome structure, the edge-closing truss is wavy in the horizontal direction and the vertical direction, the length direction of one side of the edge-closing truss is lower than that of the other side of the edge-closing truss, and the edge-closing truss comprises a sharp corner part and an arc-shaped trapezoidal part and is integrally shaped like a sharp head knife outer frame; the edge-receiving truss comprises an edge main truss, an edge additional steel frame and an edge additional truss which are connected to one side of a sharp corner of the edge main truss, an edge top column connected to the joint of a truss rod piece and the steel frame, corner connecting frames and edge top connecting frames which are connected to the edge main truss at the two sides of the corner of the connecting corner at the sharp corner of the edge main truss, corner trusses which are connected between the edge top connecting frames and the corner connecting frames, and edge secondary connecting trusses arranged on the opposite sides of the sharp corner;
the main side truss comprises a vertical and vertically arc-shaped main side frame body and a main side frame rib plate connected to the main side frame body, the main side frame body is made of I-shaped steel, the main side truss comprises a sharp corner part and an arc-shaped trapezoidal part, a notch is formed in one side of the sharp corner part, the notch is connected with an additional side steel frame in a staggered mode, and a side jacking column and a supporting steel column connected below the side jacking column are connected in the staggered mode; the side of the arc-shaped trapezoidal part of the side main truss, which is opposite to the sharp corner, is formed by splicing and connecting truss rod pieces;
the side top column comprises a side top column body and a side top column butt joint rod, and the height of the side top column body is not less than the height of the side main truss, the height of the side additional steel frame and the height of the side additional truss; the side top column butt joint rod comprises two rod pieces and a steel plate which are arranged in an I shape, and the two rod pieces which are parallel up and down are correspondingly connected with the side main truss or the side additional truss.
Furthermore, the separation truss belts are arranged at intervals in the length direction of the trapezoid parts of the edge-closing trusses and comprise two parallel separation steel frames, separation inner trusses connected between the separation steel frames and separation top connecting columns arranged below the separation trusses at intervals;
the separating inner trusses are arranged in an X shape and connected to the vertical upper part of the separating steel frame;
the separation units are arranged between the separation truss belts and are separation steel frames connected in a net shape, the separation steel frames are connected in a cross shape, and the cross-shaped connection position comprises an upper staggered connection and a lower staggered connection and a flush connection.
Furthermore, the arc truss comprises two parallel arc steel frames which are semicircular, and an arc main truss connected between the two arc steel frames, wherein an arc frame connecting column and an arc frame butt joint rod connected between the arc steel frame connecting column and the separating steel frame respectively are arranged at the joint of the separating steel frame connected between the arc steel frame and the separating unit;
the arc frame butt joint rod comprises two rod pieces and a steel plate which are arranged in an I shape, and further comprises two rod pieces which are parallel up and down and are correspondingly connected with an arc main truss, the arc main truss is horizontally arranged in a multi-stage W shape, and is vertically connected in a 'single' shape;
the arc frame connecting columns are connected through a steel frame; the semi-circular arc-shaped range is also connected with direct connection trusses at intervals, the direct connection trusses are arranged in the long direction of the separation units and in the short direction at intervals, the direct connection trusses are arranged in a multi-stage W shape in the horizontal direction and are connected in a single-row shape in the vertical direction.
Furthermore, the angle unit is in an arc-shaped frame-shaped triangle and comprises an angle connecting steel frame, an angle mark connecting top column connected below the cross angle connecting steel frame and an angle side top column connected at the top of the sharp angle of the angle connecting steel frame;
the angle connecting steel frame comprises an angle connecting main frame which is arc-shaped vertically and an angle connecting frame rib plate connected to the angle connecting main frame, and the angle connecting main frame is made of I-shaped steel; the corner edge top column is fixedly connected with the edge folding truss through a steel frame;
the corner mark connecting top column comprises a corner mark connecting top main column and a corner mark connecting top main column connecting end, the height of the corner mark connecting top main column is not less than that of the corner connecting main frame, and the corner mark connecting top main column connecting end is detachably and fixedly connected with the corner mark connecting main frame corresponding to the periphery of the corner mark connecting top main column; the connecting end of the main column on the top of the corner mark is I-shaped.
The invention has the following beneficial effects:
1) according to the invention, the support steel column is combined with the subsection and the pertinence design of the dome structure, so that the lower support is provided for the dome structure; the supporting steel column is detachably and temporarily fixedly connected with the column body in the dome structure, so that the steel frame and the truss can be hoisted and accurately positioned conveniently;
2) according to the invention, the steel frame dome structure is divided, so that the distribution of the connecting positions of the steel frame and the truss in the structure is determined, and a division and partition basis is provided for later installation and hoisting; the steel frame dome structure is a special-shaped structure, and the trusses and the steel frame are both arranged in an arc shape or double curvature mode, wherein the edge-closing trusses provide modeling and lateral support foundations for the whole structure, and the arc-shaped trusses in the middle are more beneficial to the use of a middle large-span building space under the condition that the stress of the middle is enhanced;
3) according to the invention, through the arrangement of the separation units and the separation truss belts, the dome structure is favorably and uniformly reinforced in the longitudinal direction, and the local reinforcement is favorably carried out under the change of the wave curvature; the steel frame is constructed in advance during construction, and the truss butt joint gap is reserved, so that the dome structure is favorably and effectively mounted and hoisted.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention; the primary objects and other advantages of the invention may be realized and attained by the instrumentalities particularly pointed out in the specification.
Drawings
FIG. 1 is a first perspective view of a dome structure and supporting steel columns;
FIG. 2 is a second perspective view of a steel frame dome structure and its connection structure;
FIG. 3 is a top view of a steel frame dome structure;
FIG. 4 is a schematic view of a steel frame dome structure and supporting steel columns;
FIG. 5 is a schematic view of corner units and a closed edge truss structure at a sharp corner;
FIG. 6 is a schematic view of the corner unit and the edge truss connection at the sharp corner;
FIG. 7 is a schematic view of the connection of the main edge truss;
FIG. 8 is a schematic view of the structure of the cross-shaped splicing part of the corner units;
FIG. 9 is a schematic view of the corner mark to top post connection at the cross of the corner unit;
FIG. 10 is a schematic view of a split truss belt construction;
FIG. 11 is a schematic view of an arc truss and its connection structure;
FIG. 12 is a schematic view of partial connection of the arc main trusses;
fig. 13 is a schematic view of the partition unit, the arc-shaped trapezoidal-side main truss and the connection structure thereof.
Reference numerals are as follows: 1-supporting steel column, 2-dome structure, 21-edge-folding truss, 211-edge main truss, 2111-edge main frame body, 2112-edge main frame ribbed slab, 212-edge additional steel frame, 213-edge additional truss, 214-edge top column, 2141-edge top column body, 2142-edge top column butt-joint rod, 215-corner connecting frame, 216-edge top connecting frame, 217-corner truss, 218-edge secondary connecting truss, 22-corner unit, 221-corner connecting steel frame, 2211-corner connecting main frame, 2212-corner connecting frame ribbed slab, 222-corner mark connecting top column, 2221-corner mark top main column, 2222-corner mark top main column connecting end, 223-corner edge top column, 23-truss belt, 231-separating steel frame, 232-separating inner truss, 233-separating top connecting column, 24-separating unit, 25-arc truss, 251-arc steel frame, 252-arc frame connecting column, 253-arc main truss, 254-arc frame butt joint rod, 3-frame connecting piece, 4-frame butt joint rod and 5-frame butt joint fixing plate.
Detailed Description
Taking a certain competition venue as an example, the venue is in a steel structure in a building form, and more than four layers of steel columns are connected with a roof steel frame and a truss; the building extension is arranged as an inclined steel column. The competition venue is of a steel frame-combined steel plate shear wall structure; the wall is a steel plate shear wall; the plate is a steel bar truss floor bearing plate; wherein the dome structure at the top is wavy and has a length which is lower towards the inside than towards the outside. The steel plate shear wall seismic grade is three levels, and the frame seismic grade is three levels. The foundation form is pile foundation and independent foundation.
As shown in fig. 1 to 13, a method for hoisting and constructing a dome structure, the dome structure 2 comprises a side-folding truss 21, corner units 22 connected to one inner side of the side-folding truss 21, separation truss belts 23 connected to the side-folding truss 21 and arranged at intervals in an upward direction, separation units 24 connected between the separation truss belts 23, and arc-shaped trusses 25 connected to the middle part of the side-folding truss 21 in the upward direction; supporting steel columns 1 are connected below the dome structure 2 at intervals; dome structure 2 is wavy and one side length to being less than the opposite side length to in the horizontal and vertical direction, and vertical projection contains the apex of one side and the trapezoidal portion of opposite side, and trapezoidal portion periphery is the arc limit.
In this embodiment, the steel frame dome structure 2 is wavy in the horizontal direction and the vertical direction and one side length direction is less than the other side length direction, and vertical projection contains the apex portion of one side and the trapezoidal portion of opposite side, and trapezoidal portion periphery is the arc limit.
The steel-framed dome structure 2 includes a trimming truss 21, corner units 22 connected to one inner side of the trimming truss 21, separation truss bands 23 connected to the trimming truss 21 in an upward direction and spaced apart from each other, separation units 24 connected between the separation truss bands 23, and an arc-shaped truss 25 connected to the longitudinal middle of the trimming truss 21.
In this embodiment, the edge-folding truss 21 is arranged at the periphery of the steel frame dome structure 2, the edge-folding truss 21 is wavy in the horizontal direction and the vertical direction, the length of one side is lower than that of the other side, the edge-folding truss 21 comprises a sharp corner part and an arc-shaped trapezoidal part, and the whole edge-folding truss is in a shape of a pointed head knife outer frame; the edge-folding truss 21 includes an edge main truss 211, edge-attached steel frames 212 and 213 connected to the sharp corner side of the edge main truss 211, an edge top post 214 connected to the connection between the truss members and the steel frames, corner connecting frames 215 and 216 connected to the corner of the edge main truss 211 at the corner, corner connecting frames 217 and 215 connected between the corner top connecting frames 216 and 215, and edge sub-trusses 218 disposed on the opposite side of the sharp corner.
In this embodiment, the main side truss 211 includes a main side frame 2111 which is vertically and vertically arc-shaped, and a main side frame rib plate 2112 connected to the main side frame 2111, the main side frame 2111 is made of i-steel, the main side truss 211 includes a sharp corner portion and an arc-shaped trapezoidal portion, a notch is formed in one side of the sharp corner portion, the notch is connected with an additional steel frame 212 in a staggered manner, and the staggered portion is connected with the side top post 214 and the support steel column 1 connected below the side top post 214; the side of the arc-shaped trapezoidal part of the side main truss 211 opposite to the sharp corner is formed by splicing and connecting truss rod pieces.
In this embodiment, the side pillar 214 includes a side pillar body 2141 and a side pillar butt rod 2142, and the height of the side pillar body 2141 is not less than the heights of the side main truss 211, the side additional steel frame 212, and the side additional truss 213; the side top column docking rod 2142 includes two rod members and a steel plate which are arranged in an i-shape, and further includes two rod members which are parallel up and down and are correspondingly connected to the side main truss 211 or the side additional truss 213.
The separation truss belts 23 are arranged at intervals in the length direction of the trapezoid part of the edge-closing truss 21 and comprise two parallel separation steel frames 231, separation inner trusses 232 connected between the separation steel frames 231 and separation top connecting columns 233 arranged below the separation trusses at intervals; the inner separation truss 232 is arranged in an X shape, and the inner separation truss 232 is connected to the vertical upper part of the separation steel frame 231.
In this embodiment, the separation units 24 are disposed between the separation truss bands 23, the separation units 24 are separation steel frames 231 connected in a mesh manner, the separation steel frames 231 are connected in a cross manner, and the cross connection includes vertical staggered connection and flush connection.
The arc truss 25 comprises two parallel arc steel frames 251 in a semi-circle shape, an arc main truss 253 connected between the two arc steel frames 251, an arc frame connecting column 252 and an arc frame butt-joint rod 254 connected between the arc steel frame 251 and the separating steel frame 231 of the arc steel frame connecting column 252 and between the arc steel frame 251 and the separating steel frame 231 respectively.
In this embodiment, the arc frame docking rod 254 includes two rod members and a steel plate arranged in an i-shape, and further includes two rod members arranged in parallel up and down and connected to the arc main truss 253, wherein the arc main truss 253 is arranged horizontally in a multi-stage W-shape and connected vertically in a "single" shape.
In this embodiment, the arc frame connecting columns 252 are connected through a steel frame; still the interval connection has directly to link the truss in the semicircle arc within range, directly links the truss and arranges and at the short distance interval along separating unit 24 length, directly link the truss and be multistage W form setting to the plain direction, be "individual" font connection vertically.
The corner unit 22 is an arc frame-shaped triangle, and comprises a corner steel connecting frame 221, a corner mark top connecting column 222 connected below the cross corner steel connecting frame 221, and a corner side top column 223 connected to the top of the corner steel connecting frame 221; the angle connection steel frame 221 comprises an angle connection main frame 2211 which is vertically and vertically arc-shaped and an angle connection frame ribbed plate 2212 connected to the angle connection main frame 2211, and the angle connection main frame 2211 is made of I-steel; the corner edge top column 223 is fixedly connected with the edge-folding truss 21 through a steel frame.
In this embodiment, the corner mark top-connected column 222 includes a corner mark top main column 2221 and a corner mark top main column connecting end 2222, the height of the corner mark top main column 2221 is not less than the height of the corner connecting main frame 2211, and the corner mark top main column connecting end 2222 is detachably and fixedly connected to the corner connecting main frame 2211 around the corner mark top main column 2221; the main column connecting end 2222 at the top of the corner mark is I-shaped.
With reference to fig. 1 to 13, a hoisting construction method for a dome structure 2 is further described, which specifically comprises the following steps:
step one, height division is carried out on a supporting steel column 1 according to the wave shape of a dome structure 2, and the bottom of the supporting steel column 1 is an embedded column base and is supported by an angle steel bracket; the supporting steel column 1 is installed from the middle to two ends.
Step two, installing the angle steel bracket, wherein the angle steel bracket is subjected to intervening construction when the strength of concrete of a pile foundation reaches more than 80%, and the installation sequence is sequentially carried out according to civil engineering subareas; after the civil pile foundation construction is finished, providing a working surface and completing the installation of the angle steel bracket, sequentially and alternately installing first sections of steel columns, and constructing the support steel columns 1 to a position 1.20 meters above the elevation of the top of a bearing platform; the basement support steel column 1 is installed and hoisted by adopting a near tower crane.
Step three, fixedly connecting the assembled supporting steel columns 1 in the same vertical direction, connecting the supporting steel columns through C-shaped steel plates during butt joint, and performing auxiliary construction through temporary supporting pieces when the upper section supporting steel columns 1 are connected; the supporting steel columns 1 are arranged corresponding to the columns in the dome structure 2 and are connected through temporary fixing plates or fixing frames; the supporting steel columns 1 are arranged in unequal lengths according to the layer height and the lower structure of the dome structure 2, and the top of each supporting steel column 1 can be detachably connected with a positioning plate.
In the embodiment, the lifting point is positioned on the top connecting lug plate of the support steel column 1, when the column is lifted, the column rotates while lifting the hook, so that the column is vertical, the bottom plate of the column keeps 40-60 cm away from the ground, and the crane arm slowly rotates and falls above the angle iron bracket.
After the first section of supporting steel column 1 is rotated to the right position, the central lines of two sides are matched with the marked central line of the angle steel bracket, and the angle steel bracket anchor bolts are taken into consideration from four sides, the angle steel bracket anchor bolts are aligned and penetrated into the bolt holes at the column bottom, and wind-holding ropes are adopted for reinforcement to prevent toppling; correcting the first section of column, measuring the elevation, displacement and vertical deviation of the first section of column for primary correction, then screwing down the anchor bolt nut, then performing secondary correction, and then welding with the angle steel bracket.
And step four, when the supporting steel column 1 is constructed to the dome structure 2, deepening the steel frame dome structure 2 through CAD and three-dimensional software, and dividing the steel frame dome structure 2 into two parts, namely a pure steel frame and a truss, for targeted installation and construction.
In the fourth step, the edge-closing truss 21, the corner units 22, the separation truss belts 23, the separation units 24 and the arc-shaped truss 25 are subjected to region division synchronous construction; and firstly constructing a pure steel frame part and a truss part in the same area.
Step five, after the corresponding steel frames in the corner units 22 and the separation units 24 are installed, temporarily fixing the steel frames, and particularly, carrying out encryption temporary support on the reserved gaps at the 23 parts of the separation truss belts and the reserved gaps at the 25 parts of the arc trusses; fixing the steel frame at the segmented hoisting position through a temporary fixing splint until the subsequent integral steel frame is completely installed, and then welding rigid connection nodes at the steel frame splicing position through full penetration; and rechecking the position and the line type of the steel frame.
For the separation truss belt, the separation top connecting column 233 and the separation steel frame 231 are both installed together with the angle connecting steel frame 221 and the separation unit 24 inner steel frame, wherein the separation steel frame is pre-installed with a joint corresponding to the separation inner truss 232; after the corresponding steel frames in the corner units 22 and the separation units 24 are installed, the reserved gaps at the positions of the separation truss bands 23 are encrypted to form temporary supports, the operation platform is installed to install the separation inner trusses 232, and the separation inner trusses are installed from the middle to two sides or installed together in different areas during installation.
Step six, assembling the edge-closing truss 21, the arc-shaped truss 25 and the separating truss belt 23 on site; setting an assembling operation frame, carrying out omnibearing measurement and correction on the total length, width, height and the like of the operation frame, then establishing a control grid for the placing position of the truss rod piece, and then starting assembling; and measuring and paying off the spatial positions of all points of the rod piece, and setting a limiting block for placing the rod piece.
In the sixth step, the web members of the truss are placed, positioned and temporarily fixed, and the overall position relation is measured and adjusted according to the upper chord member, the lower chord member and point position marks on the web members to be spliced; after the components are adjusted and fixed, detecting by using a steel ruler, a plumb bob and the like according to point position marks and ground projection points on the pieces to be spliced, fixing by using spot welding, recording and storing detection data, comparing and analyzing with a design drawing, and adjusting if the components do not meet the requirements; if the requirements are met, performing a welding process and a subsequent process.
Step seven, during hoisting, firstly, trial hoisting is carried out, the hoisting is stopped when the hoisting height is 100-200 mm, and the firmness of the rigging and the stability of the crane are checked; after the confirmation of no error, the crane can be instructed to slowly ascend to enable the center of the truss to be aligned with the center of the installation position, then the hook is slowly ascended, and the stable mooring ropes in four directions are manually tensioned in the hoisting process to prevent the truss from laterally swinging.
When the truss is hoisted, binding points are padded in the truss by using a soft material, and the height difference of the left support and the right support of the truss is adjusted when the steel wire ropes are bound, so that the truss can be stably positioned in the hoisting process; binding stable cables at two ends of the truss respectively; welding temporary reinforcing and positioning measures before hoisting; after the truss is installed, the truss is reinforced and fixed through the cable rope, and after the truss is hoisted in place, the truss needs to be reinforced with the steel beam and the splicing part through the frame butt-joint fixing plate 5.
The verticality of the steel beam is checked by a theodolite or a total station, the steel beam can be welded after the truss is corrected to be qualified, the truss needs to be welded after being temporarily fixed, and the section bar is a round tube and needs to be provided with a round-corner suspension cage for welding.
Step eight, hoisting the truss to a position above the cylindrical surface, rotating the truss by using a stable cable to align the truss to the splicing position so as to accurately position the truss, slowly positioning the truss, and accurately positioning the side truss and the secondary truss at the relative elevation with the roof truss beam; thereby completing the installation of the dome structure 2.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that may be made by those skilled in the art within the technical scope of the present invention will be covered by the scope of the present invention.
Claims (10)
1. A hoisting construction method of a dome structure is characterized in that the dome structure (2) comprises a side-folding truss (21), corner units (22) connected to one inner side of the side-folding truss (21), separating truss belts (23) connected to the side-folding truss (21) in an upward direction and arranged at intervals, separating units (24) connected between the separating truss belts (23) and arc-shaped trusses (25) connected to the middle of the side-folding truss (21) in the longitudinal direction; supporting steel columns (1) are connected below the dome structure (2) at intervals;
the dome structure (2) is wavy in the horizontal direction and the vertical direction, the length direction of one side is lower than that of the other side, the vertical projection comprises a sharp corner part on one side and a trapezoidal part on the other side, and the periphery of the trapezoidal part is an arc-shaped edge;
the construction method for hoisting the dome structure (2) comprises the following specific steps:
step one, height division is carried out on a support steel column (1) according to the wave shape of a dome structure (2), and the bottom of the support steel column (1) is an embedded column base and is supported by an angle steel support; the supporting steel column (1) is arranged from the middle to the two ends
Step two, installing the angle steel bracket, wherein the angle steel bracket is subjected to intervening construction when the strength of concrete of a pile foundation reaches more than 80%, and the installation sequence is sequentially carried out according to civil engineering subareas; after the civil pile foundation construction is finished, providing a working surface and completing the installation of the angle steel bracket, sequentially and alternately installing first sections of steel columns, and constructing the supporting steel columns (1) to a position 1.20 meters above the elevation of the top of the bearing platform; the basement support steel column (1) is installed and hoisted by adopting a near tower crane;
step three, fixedly connecting the assembled supporting steel columns (1) in the same vertical direction, connecting the supporting steel columns through C-shaped steel plates during butt joint, and performing auxiliary construction through temporary supporting pieces when the upper section supporting steel columns (1) are connected; the supporting steel column (1) is arranged corresponding to the center column body of the dome structure (2) and is connected through a temporary fixing plate or a fixing frame; the supporting steel column (1) is arranged in unequal lengths according to the layer height and the lower part structure of the dome structure (2), and the top of the supporting steel column (1) can be detachably connected with a positioning plate;
fourthly, when the supporting steel column (1) is constructed to the dome structure (2), deepening the steel frame dome structure (2) through CAD and three-dimensional software, and dividing the steel frame dome structure (2) into a pure steel frame and a truss for targeted installation construction;
fifthly, after the corresponding steel frames in the corner units (22) and the separating units (24) are installed, temporarily fixing the steel frames, and particularly, carrying out encryption temporary support on the reserved gaps at the positions of the separating truss belts (23) and the reserved gaps at the positions of the arc-shaped trusses (25); fixing the steel frame at the segmented hoisting position through a temporary fixing splint until the subsequent integral steel frame is completely installed, and then welding rigid connection nodes at the steel frame splicing position through full penetration; rechecking the position and the line type of the steel frame;
step six, carrying out on-site assembly on the edge-closing truss (21), the arc-shaped truss (25) and the separating truss belt (23); setting an assembling operation frame, carrying out all-dimensional measurement and correction on the total length, the width, the height and the like of the operation frame, then establishing a control grid for the placing position of the truss rod piece, and then starting assembling; measuring and setting off the spatial position of each point of the rod piece, and arranging a limiting block for placing the rod piece;
step seven, during hoisting, firstly, trial hoisting is carried out, the hoisting is stopped when the hoisting height is 100-200 mm, and the firmness of the rigging and the stability of the crane are checked; after the confirmation of no error, the crane can be instructed to slowly ascend to enable the center of the truss to be aligned with the center of the installation position, then the hook is slowly ascended, and the stable mooring ropes in four directions are manually tensioned in the hoisting process to prevent the truss from laterally shaking;
step eight, hoisting the truss to the position above the cylindrical surface, rotating the truss by using a stable cable to align the truss to the splicing position so as to accurately position the truss, slowly positioning the truss, and accurately positioning the side truss and the secondary truss at the elevation relative to the roof truss beam; thereby completing the installation of the dome structure (2).
2. The construction method for hoisting the dome structure according to claim 1, wherein the hoisting point is positioned on the top connecting lug plate of the supporting steel column (1), when the column is hoisted, the column is hoisted and rotated while being hooked, so that the column is erected, the bottom plate of the column is kept 40-60 cm away from the ground, and the crane arm is slowly rotated and falls above the angle iron bracket;
after the first section of supporting steel column (1) circles round in place, the central lines of the two sides are matched with the marked central line of the angle steel bracket, the four sides are considered, the angle steel bracket anchor bolts are aligned and penetrate into anchor bolt holes at the column bottom, and wind-holding ropes are adopted for reinforcement to prevent toppling; correcting the first section of column, measuring the elevation, displacement and vertical deviation of the first section of column for primary correction, then screwing down the anchor bolt nut, then performing secondary correction, and then welding with the angle steel bracket.
3. A method for hoisting and constructing a dome structure according to claim 1, wherein in the fourth step, the edge-closing trusses (21), the corner units (22), the separating truss belts (23), the separating units (24) and the arc trusses (25) are synchronously constructed by dividing areas; and firstly constructing a pure steel frame part and a truss part in the same area.
4. The hoisting construction method for the dome structure according to claim 1, wherein in the sixth step, the web members of the truss are placed, positioned and temporarily fixed, and the overall position relation is measured and adjusted according to the upper chord member, the lower chord member and the point position marks on the web members to be spliced; after the components are adjusted and fixed, detecting by using a steel ruler, a plumb bob and the like according to point position marks and ground projection points on the pieces to be spliced, fixing by using spot welding, recording and storing detection data, comparing and analyzing with a design drawing, and adjusting if the components do not meet the requirements; if the requirements are met, performing a welding process and a subsequent process.
5. A hoisting construction method for a dome structure according to claim 4, characterized in that the separation top connecting column (233) and the separation steel frame (231) in the separation truss band are installed together with the angle connecting steel frame (221) and the steel frame in the separation unit (24), wherein the separation steel frame is pre-installed with a joint corresponding to the separation inner truss (232); after the corresponding steel frames in the corner units (22) and the separation units (24) are installed, the reserved gaps at the positions of the separation truss belts (23) are encrypted to form temporary supports, the installation operation platform is used for installing the separation inner trusses (232), and the installation operation platform is installed from the middle to two sides or installed together in a regional mode.
6. The hoisting construction method for the dome structure according to claim 1, wherein when the truss is hoisted, binding points are padded in the binding points by using soft materials, and the height difference of left and right supports of the truss is adjusted when the steel wire ropes are bound, so that the truss can be stably positioned in the hoisting process; binding stable cables at two ends of the truss respectively; welding temporary reinforcing and positioning measures before hoisting;
after the truss is installed, the truss is reinforced and fixed by adopting a cable rope, and after the truss is hoisted in place, the truss needs to be reinforced with the steel beam and a splicing part through a frame butt-joint fixing plate (5);
the verticality of the steel beam is checked by a theodolite or a total station, the steel beam can be welded after the truss is corrected to be qualified, the truss needs to be welded after being temporarily fixed, and the section bar is a round tube and needs to be provided with a round-corner suspension cage for welding.
7. The mounting and connecting structure of the dome structure is characterized in that a steel frame dome structure (2) is wavy in the horizontal direction and the vertical direction, the length direction of one side is lower than that of the other side, a vertical projection comprises a sharp corner part on one side and a trapezoidal part on the other side, and the periphery of the trapezoidal part is an arc-shaped edge;
the steel frame dome structure (2) comprises a side folding truss (21), corner units (22) connected to one inner side of the side folding truss (21), separating truss belts (23) connected to the side folding truss (21) in the longitudinal direction and arranged at intervals, separating units (24) connected between the separating truss belts (23) and arc-shaped trusses (25) connected to the middle of the side folding truss (21) in the longitudinal direction;
the edge-closing truss (21) is arranged at the periphery of the steel frame dome structure (2), the edge-closing truss (21) is wavy in the horizontal direction and the vertical direction, the length direction of one side is lower than that of the other side, the edge-closing truss (21) comprises a sharp corner part and an arc-shaped trapezoidal part, and the whole edge-closing truss is in a sharp-head-knife outer frame shape; the edge-receiving truss (21) comprises an edge main truss (211), an edge additional steel frame (212) and an edge additional truss (213) which are connected to one side of a sharp corner of the edge main truss (211), edge top columns (214) which are connected to the joints of truss rod pieces and the steel frames, corner connecting frames (215) and edge top connecting frames (216) which are connected to the two edge main trusses (211) at the corner connecting corner of the sharp corner of the edge main truss (211), corner trusses (217) which are connected between the edge top connecting frames (216) and the corner connecting frames (215), and edge secondary connecting trusses (218) which are arranged on the opposite sides of the sharp corner;
the side main truss (211) comprises a vertical and vertically arc-shaped side main frame body (2111) and side main frame rib plates (2112) connected to the side main frame body (2111), the side main frame body (2111) is made of I-steel, the side main truss (211) comprises a sharp corner part and an arc-shaped trapezoidal part, a notch is formed in one side of the sharp corner part, the notch is connected with an additional steel frame (212) in a staggered manner, and a side top column (214) and a support steel column (1) connected below the side top column (214) are connected in the staggered manner; the side of the arc-shaped trapezoidal part of the side main truss (211) opposite to the sharp corner is formed by splicing and connecting truss rod pieces;
the side top column (214) comprises a side top column body (2141) and a side top column butt joint rod (2142), and the height of the side top column body (2141) is not less than the heights of the side main truss (211), the side additional steel frame (212) and the side additional truss (213); the side top column butt joint rod (2142) comprises two rod pieces and a steel plate which are arranged in an I shape, and further comprises two rod pieces which are parallel up and down and are correspondingly connected with the side main truss (211) or the side additional truss (213).
8. A mounting and connection structure for a dome structure according to claim 7, wherein the partition truss bands (23) are spaced apart lengthwise in the trapezoidal portion of the edge truss (21) and comprise two parallel partition steel frames (231), a partition inner truss (232) connected between the partition steel frames (231), and partition top struts (233) spaced apart below the partition trusses;
the separating inner truss (232) is arranged in an X shape, and the separating inner truss (232) is connected to the vertical upper part of the separating steel frame (231);
separate for separating unit (24) between truss area (23), separate unit (24) for being netted separation steelframe (231) of connecting, separate to be the cross between steelframe (231) and connect, the cross junction contains dislocation connection from top to bottom and flushes the connection.
9. A mounting and connecting structure of a dome structure according to claim 7, wherein the arc-shaped truss (25) comprises two parallel arc-shaped steel frames (251) in a semicircle shape, an arc-shaped main truss (253) connected between the two arc-shaped steel frames (251), arc-shaped frame connecting columns (252) arranged at the joints of the arc-shaped steel frames (251) and the separating steel frames (231) of the separating unit (24), and arc-shaped frame butt-joint rods (254) connected to the arc-shaped frame connecting columns (252) and respectively arranged between the arc-shaped steel frames (251) and the separating steel frames (231);
the arc frame butt joint rod (254) comprises two rod pieces and a steel plate which are arranged in an I shape, and further comprises two rod pieces which are parallel up and down and are correspondingly connected with an arc main truss (253), wherein the arc main truss (253) is horizontally arranged in a multi-stage W shape and is vertically connected in a single-point shape;
the arc frame connecting columns (252) are connected through a steel frame; the semi-circular arc-shaped range is also connected with direct connection trusses at intervals, the direct connection trusses are arranged in the long direction and in the short direction at intervals along the separation unit (24), the direct connection trusses are arranged in a multi-stage W shape in the horizontal direction and are connected in an 'individual' shape in the vertical direction.
10. A mounting and connecting structure for a dome structure, as claimed in claim 7, wherein said corner units (22) are in the shape of arc-shaped frame triangles comprising corner connecting steel frames (221), corner mark connecting top columns (222) connected below the cross corner connecting steel frames (221), corner side top columns (223) connected at the sharp corners of the corner connecting steel frames (221);
the angle connection steel frame (221) comprises an angle connection main frame (2211) which is vertically and vertically arc-shaped and an angle connection frame ribbed plate (2212) connected to the angle connection main frame (2211), and the angle connection main frame (2211) is made of I-shaped steel; the corner edge top column (223) is fixedly connected with the edge folding truss (21) through a steel frame;
the corner mark top-connected column (222) comprises a corner mark top main column (2221) and a corner mark top main column connecting end (2222), the height of the corner mark top main column (2221) is not less than that of the corner connecting main frame (2211), and the corner mark top main column connecting end (2222) is detachably and fixedly connected with the corner mark top main column connecting end (2221) corresponding to the corner connecting main frame (2211) on the periphery of the corner mark top main column (2221); the main column connecting end (2222) at the top of the corner mark is I-shaped.
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| CN114775881B (en) | 2022-11-08 |
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