CN115404994A - Construction method of irregular curve space three-dimensional truss system of super-large-span building - Google Patents
Construction method of irregular curve space three-dimensional truss system of super-large-span building Download PDFInfo
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- CN115404994A CN115404994A CN202211292857.6A CN202211292857A CN115404994A CN 115404994 A CN115404994 A CN 115404994A CN 202211292857 A CN202211292857 A CN 202211292857A CN 115404994 A CN115404994 A CN 115404994A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/342—Structures covering a large free area, whether open-sided or not, e.g. hangars, halls
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads
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Abstract
The invention relates to a construction method of an irregular curve space three-dimensional truss system of a super-large span building, which comprises the steps of constructing an irregular curve truss model in a computer, and finishing the processing and manufacturing of truss rods; determining the position of a jig frame, and assembling the jig frame; dividing the space three-dimensional truss into three groups; and hoisting the space three-dimensional truss in sections according to the irregular curve truss model. The invention solves the problem that the large-diameter large-wall-thickness rod piece is difficult to pre-arch in the assembling process of the truss, solves the problem that the assembling jig frame repeatedly moves and is assembled along with the hoisting construction process in the traditional construction process by selecting the reasonable assembling site position and the hoisting construction sequence, improves the construction efficiency and saves the construction period. And each truss is hoisted in two sections, the middle position adopts a # -shaped support as a temporary support jig, the deflection deformation of the whole truss system in the hoisting process is minimum, and the irregular curve shape of the roof steel structure is ensured to the maximum extent.
Description
Technical Field
The invention relates to the technical field of steel structure engineering, in particular to a construction method of an irregular curve space three-dimensional truss system of a super-large span building.
Background
Along with the improvement of the social and economic level, the demand of large-scale meeting halls, sports centers and large airports is more and more increased, the large-span irregular linear truss with complex modeling and super-large span is more and more widely applied to building design, and the large-span truss has the advantages of light dead weight, good bearing performance and high strength, can provide super-large space, saves materials and can meet various modeling requirements. But the spatial three-dimensional truss frame of the irregular curve truss with the ultra-large span is difficult to assemble under the condition of limited field and is hoisted into progress along with the truss, the assembling jig frame needs to be moved repeatedly, the hoisting difficulty is huge, the irregular curve modeling difficulty of the truss is ensured after the truss is installed, and how to scientifically, orderly, reasonably and economically organize the lifting of the ultra-large span truss to play a key role in controlling the quality, progress, construction period and construction cost of the construction.
Disclosure of Invention
In order to solve the technical problems, the invention provides a construction method of an irregular curve space three-dimensional truss system of a super-large span building.
The invention provides a construction method of an irregular curve space three-dimensional truss system of a super-large span building, which adopts the following technical scheme:
a construction method of a super-large span building irregular curve space three-dimensional truss system comprises the following steps:
s1, constructing an irregular curve truss model in a computer to complete the processing and manufacturing of a truss rod piece;
s2, determining the position of a jig frame according to an irregular curve truss model built in a computer, and assembling the jig frame;
s3, dividing the space three-dimensional truss into three groups, namely a north side truss, a middle truss and a south side truss, wherein each truss comprises two symmetrically distributed upper chords, two symmetrically distributed lower chords and a plurality of inter-truss connecting rods;
s4, hoisting the space three-dimensional truss in a segmented manner according to the irregular curve truss model;
a1. hoisting and splicing the connecting rods between the north-side truss and the north-side truss, sequentially hoisting the north-side truss and the connecting rods between the north-side truss from north to south, and hoisting each truss in two sections;
a2. hoisting and splicing the south truss and the connecting rod between the south trusses, sequentially hoisting the south truss and the connecting rod between the south trusses from south to north, and hoisting each truss in two sections;
a3. moving the middle truss to the vacant space of a construction plant area for standby, and dismantling the jig frames on the left side and the right side of the assembly;
a4. and hoisting the middle truss, wherein the middle truss is three trusses, and two trusses and connecting rods on the left side and the right side are hoisted firstly.
By adopting the technical scheme, the problem that the large-diameter large-wall-thickness rod piece is difficult to pre-arch in the assembling process of the truss is solved, and the difficult problem that the assembling jig frame moves and is assembled repeatedly along with the hoisting construction process in the traditional construction process is solved by selecting the reasonable assembling site position and the hoisting construction sequence, so that the construction efficiency is improved, and the construction period is shortened.
Preferably, the step S1 includes:
utilizing CAD to complete the establishment of a truss three-dimensional linear model according to a design drawing;
introducing structural calculation software MIDAS, and calculating to obtain a vertical displacement value of each node position of the space three-dimensional truss, wherein the displacement value is an arching value of the node position of the space three-dimensional truss;
and completing the establishment of the space three-dimensional truss model through the deepening design software TEKLA, reversely applying the arching value to the position of each node of the space three-dimensional truss, completing a truss rod piece processing drawing, and finally completing the processing and manufacturing of each component rod piece of the truss.
Preferably, the step S2 includes:
the jig frame is arranged between two adjacent space trusses.
Preferably, the step S4 includes:
hoisting a first section of each truss, and determining the position of the truss to be fixed according to the irregular curve truss model;
installing a support frame shaped like a Chinese character 'jing' to support the first section of truss;
and hoisting the second section of each truss, and welding the spatial three-dimensional truss at high altitude.
By adopting the technical scheme, each truss is hoisted in two sections in the hoisting process of the truss, the middle position adopts the # -shaped support as the temporary support jig, the deflection deformation in the hoisting process of the whole truss system is minimum, and the irregular curve shape of the steel structure of the roof is ensured to the maximum extent.
Preferably, the step of welding each truss segment comprises:
hoisting the lower chord member to the jig frame, controlling the elevation position of each node, and then performing spot welding and fixing;
then, the upper chord is assembled and fixed, the connecting rods between the trusses are installed, and all-dimensional high-altitude welding is carried out after the assembling size is confirmed.
Preferably, the step of welding at high altitude comprises:
measuring the relative positioning size of the jig frame and the characteristic points of the space three-dimensional truss in the computer, and adjusting the out-of-tolerance part according to numerical values;
after the adjustment is finished, welding the space special-shaped steel pipe truss;
and after welding, carrying out 100% ultrasonic flaw detection on the welding seam.
In summary, the invention has the following beneficial technical effects:
the construction method of the irregular curved space three-dimensional truss system of the super-large span building solves the problem that a large-diameter large-wall-thickness rod piece is difficult to pre-arch in the assembling process of the truss, solves the problem that the assembling jig frame moves and is assembled repeatedly along with the hoisting construction process in the traditional construction process by selecting the reasonable assembling site position and the hoisting construction sequence, improves the construction efficiency and saves the construction period. And each truss is hoisted in two sections in the hoisting process of the truss, the middle position adopts a # -shaped support as a temporary support jig, the deflection deformation of the whole truss system in the hoisting process is minimum, and the irregular curved shape of the steel structure of the roof is ensured to the maximum extent.
Drawings
Fig. 1 is a schematic view of a truss hoisting sequence in the invention.
Detailed Description
The present invention is described in further detail below with reference to fig. 1.
The embodiment of the invention discloses a construction method of a super-large span building irregular curve space three-dimensional truss system. Referring to fig. 1, the method includes the following steps:
s1, constructing an irregular curve truss model in a computer to complete the processing and manufacturing of a truss rod piece;
specifically, the construction of a truss three-dimensional linear model is completed by utilizing CAD according to a design drawing;
introducing structural calculation software MIDAS, calculating to obtain a vertical displacement value of each node position of the space three-dimensional truss, wherein the displacement value is an arching value of the node position of the space three-dimensional truss, the vertical displacement value of each node position of the upper chord and the lower chord of the truss is calculated according to the construction process flow of the truss and the load to be borne by the truss, such as the dead weight load of a metal roof, the dead weight load of a truss body, the live load of the roof, the snow load and the wind load, and the displacement value is the arching value of the node position of the truss;
and (3) completing the establishment of a truss model through the deepening design software TEKLA, reversely applying the arching value to the position of each node of the truss, completing a truss rod piece processing drawing, and finally completing the processing and manufacturing of each component rod piece of the truss.
S2, determining the position of a jig frame according to an irregular curve truss model built in a computer, and assembling the jig frame;
specifically, the jig frame is arranged between two adjacent space three-dimensional trusses.
It should be noted that, in order to ensure that the structure is assembled and constructed safely and reliably, the assembly jig frame needs to be leveled in a field, and the slag stones are filled and compacted, and the local part of the upright rod is provided with 1.5m 0.01m concrete for leveling, so that the assembly is facilitated. Due to the fact that a field is limited, the trusses cannot be assembled in a whole truss mode, each truss can be assembled in two sections, the assembling field is arranged in the middle of the field, two groups of jig frames need to be arranged, each group of assembling jig frames can assemble two half trusses, and the two groups of jig frames can assemble 2 trusses simultaneously. When assembling the jig frame, firstly assembling 4 trusses on the north side, then assembling 4 trusses on the south side and finally assembling 3 trusses at the middle position by combining the hoisting sequence.
S3, dividing the space three-dimensional truss into three groups, namely a north side truss, a middle truss and a south side truss, wherein each truss comprises two sections of symmetrically distributed upper chords, two sections of symmetrically distributed lower chords and a plurality of inter-truss connecting rods;
the truss structure is an irregular curved space three-dimensional inverted triangle truss, the span reaches 117 meters, the self weight is 128 to 240 tons, the total number of the trusses is 11, the height of the upper chord and the lower chord of the truss is 6 meters, the width of the upper chord is 4 meters, and the distance between the web members is 7.5 meters.
S4, hoisting the space three-dimensional truss in sections according to the irregular curve truss model;
specifically, a first section of each truss is hoisted, and the position of the truss is determined to be fixed according to an irregular curve truss model;
installing a support frame shaped like a Chinese character 'jing' to support the first section of truss; wherein, each truss is hoisted in two sections, and when the first section is installed, a temporary support is needed to be arranged for supporting. The temporary cross-shaped support adopts tower crane standard knots as the support, and the size of each standard knot is 1.8 meters by 2.8 meters. The standard knot adopts square pipe tower crane standard knot as support, and the height of each standard knot of tower crane is 1.8 meters by 2.8 meters. The standard section four main rods are square tubes 135 × 12, the straight web members are square tubes 50 × 5, the inclined web members are square tubes 80 × 6 and square tubes 70 × 6, and the standard sections are connected through M36 large hexagon bolts. According to the actual elevation of the upper chord of each main truss, the top conversion tool is additionally arranged at the top of the support to support the vertical pipe, the contact part of the top surface of the vertical pipe and the chord is cut into an arc shape, the vertical pipe can be effectively attached to the upper chord, and the danger caused by sliding is prevented.
And hoisting the second section of each truss, and welding the spatial three-dimensional truss at high altitude.
a1. Hoisting and splicing the connecting rod between the north truss and the north truss, sequentially hoisting the north truss and the connecting rod of the north truss from north to south, and hoisting each truss in two sections;
a2. hoisting and splicing the south truss and the connecting rod between the south trusses, sequentially hoisting the south truss and the connecting rod of the south truss from south to north, and hoisting each truss in two sections;
a3. moving the middle truss to the vacant space of a construction plant area for standby, and dismantling the jig frames on the left side and the right side of the assembly;
a4. and hoisting the middle truss, wherein the middle truss is three trusses, and two trusses and connecting rods on the left side and the right side are hoisted firstly.
The optimal hoisting sequence can reduce the construction cost to the maximum extent, accelerate the construction progress and ensure the construction safety. Firstly, hoisting 4 trusses and connecting rods among trusses on the north side by adopting a 350-ton crawler crane, sequentially hoisting the 4 trusses and the connecting rods from north to south, and hoisting each truss in 2 sections; hoisting 4 trusses and connecting rods on the south side by using a 350-ton crawler crane again, sequentially hoisting the 4 trusses and the connecting rods from south to north, and hoisting each truss in two sections; assembling again to complete 3 trusses in the middle part, wherein 6 sections are total, moving to the empty space of a construction plant area for later use, and disassembling an assembling jig frame; and hoisting two trusses at the left side and the right side of the middle truss and the connecting rods by using a 350-ton crawler crane again, dismantling the crawler crane after hoisting is finished, and finally hoisting each section of the truss at the middle position by using two 500-ton truck cranes.
Specifically, the step of welding each truss section comprises:
hoisting the lower chord to a jig frame, controlling the elevation position of each node, and then performing spot welding and fixing;
then, the upper chord is assembled and fixed, the connecting rods between the trusses are installed, and all-dimensional high-altitude welding is carried out after the assembling size is confirmed.
It should be noted that in the truss assembling process, a 50t truck crane is used for hoisting the lower chord member to the assembling jig frame, the elevation value of each point of the node part is measured, the segmented butt joint position is well controlled and temporarily fixed by spot welding, then the truck crane is used for hoisting and transporting the upper chord main rod in sequence and positioning, the web members are assembled after the upper chord member and the lower chord member adopt the dimensional elevations of a theodolite, a total station and a level instrument and the position retest dimension is correct, and welding is performed from the middle to the two sides in a symmetrical and balanced manner after the assembling dimension of the truss is confirmed to be correct, so that the deformation caused by welding is reduced to the minimum.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above are all preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (6)
1. A construction method of a super-large span building irregular curve space three-dimensional truss system is characterized by comprising the following steps: the method comprises the following steps:
s1, constructing an irregular curve truss model in a computer to complete the processing and manufacturing of a truss rod piece;
s2, determining the position of a jig frame according to an irregular curve truss model built in a computer, and assembling the jig frame;
s3, dividing the space three-dimensional truss into three groups, namely a north side truss, a middle truss and a south side truss, wherein each truss comprises two symmetrically distributed upper chords, two symmetrically distributed lower chords and a plurality of inter-truss connecting rods;
s4, hoisting the space three-dimensional truss in a segmented manner according to the irregular curve truss model;
a1. hoisting and splicing the connecting rods between the north-side truss and the north-side truss, sequentially hoisting the north-side truss and the connecting rods between the north-side truss from north to south, and hoisting each truss in two sections;
a2. hoisting and splicing the south truss and the connecting rod between the south trusses, wherein the south truss and the connecting rod between the south trusses are hoisted from south to north in sequence, and each truss is hoisted in two sections;
a3. moving the middle truss to the vacant space of a construction plant area for standby, and dismantling the jig frames on the left side and the right side of the assembly;
a4. and hoisting the middle truss, wherein the middle truss is three trusses, and two trusses and connecting rods on the left side and the right side are hoisted firstly.
2. The construction method of the irregular curved space three-dimensional truss system for the super-large span building according to claim 1, wherein the method comprises the following steps: the step S1 includes:
utilizing CAD to complete the establishment of a truss three-dimensional linear model according to a design drawing;
introducing structural calculation software MIDAS, and calculating to obtain a vertical displacement value of each node position of the space three-dimensional truss, wherein the displacement value is an arching value of the node position of the space three-dimensional truss;
and completing the establishment of the space three-dimensional truss model through the deepening design software TEKLA, reversely applying the arching value to the position of each node of the space three-dimensional truss, completing a truss rod piece processing drawing, and finally completing the processing and manufacturing of each component rod piece of the truss.
3. The construction method of the irregular curved space three-dimensional truss system for the super-large span building according to claim 1, wherein the method comprises the following steps: the step S2 includes:
the jig frame is arranged between two adjacent space three-dimensional trusses.
4. The construction method of the irregular curved space three-dimensional truss system for the super-large span building according to claim 1, wherein the method comprises the following steps: the step S4 includes:
hoisting a first section of each truss, and determining the position of the truss to be fixed according to the irregular curve truss model;
installing a support frame shaped like a Chinese character 'jing' to support the first section of truss;
and hoisting the second section of each truss, and welding the spatial three-dimensional truss at high altitude.
5. The construction method of the irregular curved space three-dimensional truss system for the super-large span building according to claim 4, wherein: the step of welding each truss segment comprises:
hoisting the lower chord member to the jig frame, controlling the elevation position of each node, and then performing spot welding and fixing;
and then, assembling and fixing the upper chord member, installing the connecting rods between the trusses, and carrying out all-dimensional high-altitude welding after confirming the assembling size.
6. The construction method of the irregular curved space three-dimensional truss system for the super-large span building according to claim 5, wherein: the step of high altitude welding includes:
measuring the relative positioning size of the jig frame and the characteristic points of the space three-dimensional truss in the computer, and adjusting the out-of-tolerance part according to numerical values;
after the adjustment is finished, welding the space special-shaped steel pipe truss;
and after welding, carrying out 100% ultrasonic flaw detection on the welding seam.
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