CN104746883A - Construction method for three-crane lifting installation used for bow-shaped space truss - Google Patents
Construction method for three-crane lifting installation used for bow-shaped space truss Download PDFInfo
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- CN104746883A CN104746883A CN201510140899.1A CN201510140899A CN104746883A CN 104746883 A CN104746883 A CN 104746883A CN 201510140899 A CN201510140899 A CN 201510140899A CN 104746883 A CN104746883 A CN 104746883A
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Abstract
The invention discloses a construction method for three-crane lifting installation used for a bow-shaped space truss. The construction method includes the following steps of conducting simulation to determine the gravity center of the bow-shaped space truss, arranging three lifting points and three cranes, conducting separation through the three cranes, conducting carrying and correcting work after separation is completed, hoisting the bow-shaped space truss on a platform, and fixing the bow-shaped space truss to the platform. The construction method is simple, easy to achieve, high in installation efficiency, scientific, convenient and capable of saving the labor cost and greatly reducing hoisting expenses. By separating, carrying, correcting and hoisting the whole bow-shaped space truss, sectional butt joint and correction of the truss are reduced, aloft welding does not need to be conducted between sectional trusses, and therefore the installation quality and the welding quality are improved, the truss installation construction period is shortened, and truss hoisting expenses are saved.
Description
Technical field
The present invention relates to a kind of arcuate space truss three machines and lift construction method of installation.
Background technology
Truss is a kind of being hinged at two ends each other by rod member, by the supporting traverse structure of welding, riveting or bolt being formed by connecting.Its advantage is that rod member mainly bears pulling force or pressure, thus can make full use of the intensity of material, and when span is larger, comparable solid web girder saves material, alleviates deadweight and increases rigidity.
At present, for the installation of the arcuate space truss of super large, adopt on-the-spot whole truss structure assembled after, be divided into 2 ~ 3 sections of truss, each point cut truss tread flaking, just removing, lift the construction method that installation welds again.Its weak point is: each point is cut truss installa-tion and all need to locate respectively, fix, correct.Point cutting truss and point cut at overhead welding between truss, the large and welding quality of welding capacity not easily ensures.Long construction period, affects programming.Security risk is large.
Summary of the invention
The object of the present invention is to provide a kind of arcuate space truss three machines to lift construction method of installation, this construction method of installation is simple and easy to realize, and installation effectiveness is high, and science is convenient, save cost of labor, significantly reduce lifting cost uses.By by the tread flaking of whole arcuate space truss, just removing, lifting, reduce truss and divide and cut docking, correct, thus avoid overhead welding, improve welding quality, shorten the truss installa-tion duration and save truss lifting cost and use.
In order to solve the problems of the technologies described above, adopt following technical scheme:
A kind of arcuate space truss three machines lift construction method of installation, and this construction method comprises the following steps:
(1) center of gravity of arcuate space truss is determined in emulation;
(2) three suspension centres and three loop wheel machines are set: the first center of gravity according to arcuate space truss and contour structure size arrange three suspension centres, at the middle part of arcuate space truss, the first suspension centre is set, at the suspension column of arcuate space truss, the second suspension centre is set, 3rd suspension centre is set in the end of arcuate space truss, and on three suspension centres, hanger is installed; Then three loop wheel machines are set respectively according to three suspension centres set, the first suspension centre arrange large-scale crane, the second suspension centre arranges medium-sized loop wheel machine, the 3rd suspension centre arranges small-sized crane;
(3) three loop wheel machines are utilized to carry out tread flaking work;
(4) carry out removing just working after tread flaking work completes: first step large-scale crane slowly promotes arcuate space truss as main lifting, medium-sized loop wheel machine hangs the suspension column of arcuate space truss, the suspension column of arcuate space truss is kept to depart from the state of ground, the suspension hook of small-sized crane promotes with arcuate space truss, auxiliary arcuate space truss stands up, after the end of arcuate space truss departs from ground completely, remove the suspension hook of small crane; Second step keeps the suspension hook of medium-sized loop wheel machine motionless, makes arcuate space truss entirety be in the slow circumvolve of vertical direction, completes removing of arcuate space truss and just work;
(5) arcuate space truss is lifted on platform;
(6) arcuate space truss is fixed on platform: first with bearing pin, the suspension column of arcuate space truss is fixed on platform, and the end of arcuate space truss is supported in temporary support columns, adjust arcuate space truss state afterwards to design point, draw and establish cable rope to be fixed; Then with the middle part mounting stay of medium-sized loop wheel machine at arcuate space truss; Then, after strut installation in position, be fixed at the two ends bearing pin of strut and temporary support columns respectively; Finally remove the suspension hook of large-scale crane, remove three loop wheel machines, complete the installation work of whole arcuate space truss.
Further, in step (1), determine that the method for the center of gravity of arcuate space truss first sets up the spatial entities model of arcuate space truss, then according to the contour structure size of arcuate space truss determine respectively arcuate space truss be in horizontal, stand up, remove just with lift the position of centre of gravity that is fixed on platform.Because arcuate space truss position of centre of gravity can constantly can change along with the lifting of three loop wheel machines, by analogue simulation determination arcuate space truss be in horizontal, stand up, remove and be just fixed on the change of position of centre of gravity on platform with lifting, thus advantageously more quickly and easily truss is lifted into the position of specifying in staff.
Further, the concrete grammar arranging the first suspension centre, the second suspension centre and the 3rd suspension centre in step (2) is that the lifting focus point that applicable arcuate space truss lifts is determined in the change that the first step is in position of centre of gravity that is horizontal, that stand up, just removing and be fixed on platform according to arcuate space truss; Second step is at the middle part of arcuate space truss, and position more than lifting focus point arranges the first suspension centre; 3rd step is according to the first suspension centre and the lifting determined locus of focus point, and in suspension column and the end of arcuate space truss, the position below lifting focus point arranges the second suspension centre and the 3rd suspension centre respectively.Due to the construction method of installation adopting three machines to lift, three different suspension centres be determined.First a lifting focus point is determined in the position of centre of gravity change by analyzing arcuate space truss, by lifting the determination of focus point, at the high-order suspension centre arranged by position more than the lifting focus point of truss hoisting, is namely the first suspension centre; Pass through according to the first suspension centre and lifting focus point simultaneously, position below truss lifting focus point arranges two low level suspension centres respectively, namely be the second suspension centre and the 3rd suspension centre, the plane that first suspension centre, the second suspension centre and the 3rd suspension centre are formed is by lifting focus point, namely the first suspension centre, the second suspension centre, the 3rd suspension centre and lifting focus point 4 are in same plane, three suspension centres formed so stressed clear and definite, lifting is stable thus improve the security reliability lifted.
Further, in step (2), the main hoisting structure formed with the first suspension centre, installs four movable hangers at the middle part of arcuate space truss; With the auxiliary hoisting structure that the second suspension centre and the 3rd suspension centre are formed, at the suspension column of arcuate space truss and end, two fixing hangers are installed respectively.Large-scale crane lifting arcuate space truss adopts four hangers, 4 binding liftings, be installed on the outside of trussed construction, namely four hangers are all arranged on the Nodes of truss web and chord member, lifting stress point is placed on chord member, and the position of hanger changes with the difference of the shape of truss, weight, center of gravity.The auxiliary hoisting structure that second suspension centre and the 3rd suspension centre are formed, installs two fixing hangers respectively, and auxiliary main hoisting structure, completes the installation of whole truss jointly.
Further, in step (2), the concrete grammar arranging three loop wheel machines connects four wire rope on four movable hangers of the first suspension centre, and four rope coils be held together and be connected on the suspension hook of large-scale crane by the other end of wire rope; On two the fixing hangers of the second suspension centre with the 3rd suspension centre, be connected two wire rope according to the above-mentioned method arranging large-scale crane respectively, and two rope coils be held together the other end of wire rope is connected on the hanger of medium-sized loop wheel machine and small-sized crane.
Further, in step (3), simultaneously the concrete operations of tread flaking start three loop wheel machines, and large-scale crane is as main lifting, and medium-sized loop wheel machine and small-sized crane, as auxiliary lifting, make the suspension column of arcuate space truss and end depart from ground smoothly; Then remove the assembled moulding bed of arcuate space truss, by the lifting of arcuate space truss to positive status to be removed, and keep arcuate space truss to lie low.In tread flaking process, three loop wheel machines work simultaneously, by large-scale crane as main lifting, entirety pulls truss to rise, medium-sized loop wheel machine and small-sized crane are as auxiliary lifting, the suspension column of arcuate space truss and end can not be collided with ground, ground can be departed from smoothly, enter positive status to be removed safely.
Further, in step (4), the concrete operations of lifting are the suspension hooks first removing medium-sized loop wheel machine, four of large-scale crane hangers are all among uniform stressed, by the remaining lifting work of large-scale crane complete independently.
Further, in step (6), draw the method for establishing cable rope to be first draw respectively in the both sides at the middle part of arcuate space truss to establish two cable wind ropes, then draw respectively at the suspension column of arcuate space truss and the both sides of end and establish two cable wind ropes, keep the lateral stability of arcuate space truss.Utilization is drawn and is established cable rope, makes truss installa-tion structure on platform more stable.
Owing to adopting technique scheme, there is following beneficial effect:
The present invention is that a kind of arcuate space truss three machines lift construction method of installation, and this construction method of installation is simple and easy to realize, and installation effectiveness is high, and science is convenient, save cost of labor, significantly reduce lifting cost uses.By by the tread flaking of whole arcuate space truss, just removing, lifting, reduce truss and divide and cut docking, correct, thus avoid overhead welding, improve welding quality, shorten the truss installa-tion duration and save truss lifting cost and use.Three boards are adopted to hang, wherein large-scale crane utilizes four movable hangers, the middle part of colligation arcuate space truss is as the first suspension centre, medium-sized loop wheel machine utilizes two fixing hangers, and the suspension column of colligation arcuate space truss, as the second suspension centre, small-sized crane utilizes two fixing hangers, the end of colligation arcuate space truss, as the 3rd suspension centre, makes whole arcuate space truss by tread flaking, is just removing, the step such as lifting is successfully lifted into assigned address.The plane that first suspension centre, the second suspension centre and the 3rd suspension centre are formed is by lifting focus point, namely the first suspension centre, the second suspension centre, the 3rd suspension centre and lifting focus point 4 are in same plane, and three suspension centres of formation are stressed clearly, lifting is stable thus the security reliability of raising lifting.Do not need to cut between truss to locate respectively, fix and correct to each point to install, do not need to carry out overhead welding between point section truss and point section truss yet, thus improve installation quality and welding quality, shorten the truss installa-tion duration and save truss lifting cost use.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described:
Fig. 1 is the structural representation of arcuate space truss in the present invention;
Fig. 2 is the structural representation that in the present invention, a kind of arcuate space truss lifts construction method of installation with three machines;
Fig. 3 is that in the present invention, arcuate space truss is removing the structural representation in positive process;
Fig. 4 be in the present invention arcuate space truss in hoisting process structural representation;
Fig. 5 is structural representation when arcuate space truss is connected with platform in the present invention.
Detailed description of the invention
As shown in Figures 1 to 5, a kind of arcuate space truss is that emulation determines that the center of gravity of arcuate space truss → arrange three suspension centres and three loop wheel machines → utilize three loop wheel machines carry out tread flaking work → carry out removing after tread flaking work completes and just to work → be lifted into by arcuate space truss on platform 11 → be fixed on platform 11 by arcuate space truss by the flow process that three machines lift construction method of installation.
(1) center of gravity of arcuate space truss is determined in emulation: the spatial entities model first setting up arcuate space truss, then according to the contour structure size of arcuate space truss determine respectively arcuate space truss be in horizontal, stand up, remove the just fixing position of centre of gravity on platform 11 with lifting.Because arcuate space truss position of centre of gravity can constantly can change along with the lifting of three loop wheel machines, be in change that is horizontal, that stand up, remove the just fixing position of centre of gravity on platform 11 with lifting by analogue simulation determination arcuate space truss, thus advantageously more quickly and easily truss be lifted into the position of specifying in staff.
(2) three suspension centres and three loop wheel machines are set: the first step according to arcuate space truss be in horizontal, stand up, just to remove and the lifting focus point 14 that applicable arcuate space truss lifts is determined in the change of fixing position of centre of gravity on platform 11; Second step is at the middle part 7 of arcuate space truss, and the position of lifting focus point more than 14 arranges the first suspension centre 4; 3rd step is according to the first suspension centre 4 and the lifting determined locus of focus point 14, and in suspension column 8 and the end 9 of arcuate space truss, the position of lifting focus point less than 14 arranges the second suspension centre 5 and the 3rd suspension centre 6 respectively; 4th step installs four movable hangers at the middle part 7 of arcuate space truss; The auxiliary hoisting structure that 5th step is formed with the second suspension centre 5 and the 3rd suspension centre 6, installs two fixing hangers respectively at the suspension column 8 of arcuate space truss and end 9.6th step connects four wire rope on four movable hangers of the first suspension centre 4, and four rope coils is held together and is connected on the suspension hook of large-scale crane 1 by the other end of wire rope; On two the fixing hangers of the second suspension centre 5 with the 3rd suspension centre 6, be connected two wire rope according to the above-mentioned method arranging large-scale crane 1 respectively, and two rope coils are held together the other end of wire rope is connected to medium-sized loop wheel machine 2 and small-sized crane 3 hanger on.Due to the construction method of installation adopting three machines to lift, three different suspension centres be determined.First a lifting focus point 14 is determined in the position of centre of gravity change by analyzing arcuate space truss, by lifting the determination of focus point 14, at the high-order suspension centre arranged by the position of the lifting focus point more than 14 of truss hoisting, is namely the first suspension centre 4; Pass through according to the first suspension centre 4 and lifting focus point 14 simultaneously, in the position of truss lifting focus point less than 14, two low level suspension centres are set respectively, namely be the second suspension centre 5 and the 3rd suspension centre 6, the plane that first suspension centre 4, second suspension centre 5 and the 3rd suspension centre 6 are formed is by lifting focus point 14, namely the first suspension centre 4, second suspension centre 5, the 3rd suspension centre 6 and lifting focus point 14 4 are in same plane, three suspension centres formed so stressed clear and definite, lifting is stable thus improve the security reliability lifted.Large-scale crane lifting arcuate space truss adopts four hangers, 4 binding liftings, be installed on the outside of trussed construction, namely four hangers are all arranged on the Nodes of truss web and chord member, lifting stress point is placed on chord member, and the position of hanger changes with the difference of the shape of truss, weight, center of gravity.The auxiliary hoisting structure that second suspension centre 5 and the 3rd suspension centre 6 are formed, installs two fixing hangers respectively, and auxiliary main hoisting structure, completes the installation of whole truss jointly.
(3) three loop wheel machines are utilized to carry out tread flaking work: start three loop wheel machines, large-scale crane 1 is as main lifting, and medium-sized loop wheel machine 2 and small-sized crane 3, as auxiliary lifting, make the suspension column 8 of arcuate space truss and end 9 depart from ground smoothly simultaneously; Then remove the assembled moulding bed 10 of arcuate space truss, by the lifting of arcuate space truss to positive status to be removed, and keep arcuate space truss to lie low.In tread flaking process, three loop wheel machines work simultaneously, by large-scale crane 1 as main lifting, entirety pulls truss to rise, medium-sized loop wheel machine 2 and small-sized crane 3 are as auxiliary lifting, the suspension column 8 of arcuate space truss and end 9 can not be collided with ground, ground can be departed from smoothly, enter positive status to be removed safely.
(4) carry out removing just working after tread flaking work completes: large-scale crane 1 slowly promotes arcuate space truss as main lifting, medium-sized loop wheel machine 2 hangs the suspension column 8 of arcuate space truss, the suspension column 8 of arcuate space truss is kept to depart from the state of ground, the suspension hook of small-sized crane 3 promotes with arcuate space truss, auxiliary arcuate space truss stands up, after the end 9 of arcuate space truss departs from ground completely, remove the suspension hook of small crane; Then keep the suspension hook of medium-sized loop wheel machine 2 motionless, make arcuate space truss entirety be in the slow circumvolve of vertical direction, complete removing of arcuate space truss and just work.Removing in positive process, large-scale crane 1 still slowly promotes arcuate space truss as main lifting, small-sized crane 3 assists arcuate space truss to stand up, medium-sized loop wheel machine 2 suspension hook is motionless, truss integral is caused to be in the slow circumvolve of vertical direction, its Main Function does not contact to earth for making truss remove in positive process in rotation, does not also need truss to be hung ground too high, only lifting bottom truss need be left ground and be about about 50mm.
(5) arcuate space truss is lifted on platform 11: the 3rd step hoisting process: the suspension hook first removing medium-sized loop wheel machine 2, four of large-scale crane 1 hangers is all among uniform stressed, by the remaining lifting work of large-scale crane 1 complete independently.
(6) arcuate space truss is fixed on platform 11: first with bearing pin, the suspension column 8 of arcuate space truss is fixed on platform 11 bearing, and the end 9 of arcuate space truss is supported in temporary support columns 12, adjust arcuate space truss state afterwards to design point, draw and establish cable rope to be fixed; Then with middle part 7 mounting stay 13 of medium-sized loop wheel machine 2 at arcuate space truss; Then, after strut 13 installation in position, be fixed at the two ends bearing pin of strut 13 and temporary support columns 12 respectively; Finally remove the suspension hook of large-scale crane 1, remove three loop wheel machines, complete the installation work of whole arcuate space truss.Draw the method for establishing cable rope to be first draw respectively in the both sides at the middle part 7 of arcuate space truss to establish two cable wind ropes, then draw respectively at the suspension column 8 of arcuate space truss and the both sides of end 9 and establish two cable wind ropes, keep the lateral stability of arcuate space truss.Utilization is drawn and is established cable rope, makes truss installa-tion structure on platform 11 more stable.
These are only specific embodiments of the invention, but technical characteristic of the present invention is not limited thereto.Any based on the present invention, for solving substantially identical technical problem, realize substantially identical technique effect, done ground simple change, equivalent replacement or modification etc., be all covered by among protection scope of the present invention.
Claims (8)
1. arcuate space truss three machines lift a construction method of installation, it is characterized in that: comprise following installation steps:
(1) center of gravity of arcuate space truss is determined in emulation;
(2) three suspension centres and three loop wheel machines are set: the first center of gravity according to arcuate space truss and contour structure size arrange three suspension centres, at the middle part of arcuate space truss, the first suspension centre is set, at the suspension column of arcuate space truss, the second suspension centre is set, 3rd suspension centre is set in the end of arcuate space truss, and on three suspension centres, hanger is installed; Then three loop wheel machines are set respectively according to three suspension centres set, the first suspension centre arrange large-scale crane, the second suspension centre arranges medium-sized loop wheel machine, the 3rd suspension centre arranges small-sized crane;
(3) three loop wheel machines are utilized to carry out tread flaking work;
(4) carry out removing just working after tread flaking work completes: first step large-scale crane slowly promotes arcuate space truss as main lifting, medium-sized loop wheel machine hangs the suspension column of arcuate space truss, the suspension column of arcuate space truss is kept to depart from the state of ground, the suspension hook of small-sized crane promotes with arcuate space truss, auxiliary arcuate space truss stands up, after the end of arcuate space truss departs from ground completely, remove the suspension hook of small crane; Second step keeps the suspension hook of medium-sized loop wheel machine motionless, makes arcuate space truss entirety be in the slow circumvolve of vertical direction, completes removing of arcuate space truss and just work;
(5) arcuate space truss is lifted on platform;
(6) arcuate space truss is fixed on platform: first with bearing pin, the suspension column of arcuate space truss is fixed on platform, and the end of arcuate space truss is supported in temporary support columns, adjust arcuate space truss state afterwards to design point, draw and establish cable rope to be fixed; Then with the middle part mounting stay of medium-sized loop wheel machine at arcuate space truss; Then, after strut installation in position, be fixed at the two ends bearing pin of strut and temporary support columns respectively; Finally remove the suspension hook of large-scale crane, remove three loop wheel machines, complete the installation work of whole arcuate space truss.
2. a kind of arcuate space truss three machines lift construction method of installation according to claim 1, it is characterized in that: in described step (1), determine that the method for the center of gravity of arcuate space truss first sets up the spatial entities model of arcuate space truss, then according to the contour structure size of arcuate space truss determine respectively arcuate space truss be in horizontal, stand up, remove just with lift the position of centre of gravity that is fixed on platform.
3. a kind of arcuate space truss three machines lift construction method of installation according to claim 1, it is characterized in that: the concrete grammar arranging three suspension centres in described step (2) is that the lifting focus point that applicable arcuate space truss lifts is determined in the change that the first step is in position of centre of gravity that is horizontal, that stand up, just removing and be fixed on platform according to arcuate space truss; Second step is at the middle part of arcuate space truss, and position more than lifting focus point arranges the first suspension centre; 3rd step is according to the first suspension centre and the lifting determined locus of focus point, and in suspension column and the end of arcuate space truss, the position below lifting focus point arranges the second suspension centre and the 3rd suspension centre respectively.
4. a kind of arcuate space truss three machines lift construction method of installation according to claim 1, it is characterized in that: in described step (2), with the main hoisting structure that the first suspension centre is formed, four movable hangers are installed at the middle part of arcuate space truss; With the auxiliary hoisting structure that the second suspension centre and the 3rd suspension centre are formed, at the suspension column of arcuate space truss and end, two fixing hangers are installed respectively.
5. a kind of arcuate space truss three machines lift construction method of installation according to claim 1, it is characterized in that: in described step (2), the concrete grammar arranging three loop wheel machines connects four wire rope on four movable hangers of the first suspension centre, and four rope coils be held together and be connected on the suspension hook of large-scale crane by the other end of wire rope; On two the fixing hangers of the second suspension centre with the 3rd suspension centre, be connected two wire rope according to the above-mentioned method arranging large-scale crane respectively, and two rope coils be held together the other end of wire rope is connected on the hanger of medium-sized loop wheel machine and small-sized crane.
6. a kind of arcuate space truss three machines lift construction method of installation according to claim 1, it is characterized in that: in described step (3), simultaneously the concrete operations of tread flaking start three loop wheel machines, large-scale crane is as main lifting, medium-sized loop wheel machine and small-sized crane, as auxiliary lifting, make the suspension column of arcuate space truss and end depart from ground smoothly; Then remove the assembled moulding bed of arcuate space truss, by the lifting of arcuate space truss to positive status to be removed, and keep arcuate space truss to lie low.
7. a kind of arcuate space truss three machines lift construction method of installation according to claim 1, it is characterized in that: in described step (5), the concrete operations of lifting are the suspension hooks first removing medium-sized loop wheel machine, four of large-scale crane hangers are all among uniform stressed, by the remaining lifting work of large-scale crane complete independently.
8. a kind of arcuate space truss three machines lift construction method of installation according to claim 1, it is characterized in that: in described step (6), the method of establishing cable rope is drawn to be first draw respectively in the both sides at the middle part of arcuate space truss to establish two cable wind ropes, then draw respectively at the suspension column of arcuate space truss and the both sides of end and establish two cable wind ropes, keep the lateral stability of arcuate space truss.
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| CN105401691A (en) * | 2015-11-23 | 2016-03-16 | 中建钢构有限公司 | Temporary support device for shuttle-shaped space truss and assembling method thereof |
| CN105971291A (en) * | 2016-05-12 | 2016-09-28 | 中国华冶科工集团有限公司 | Hoisting method of L-shaped space truss |
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| CN106869319A (en) * | 2017-01-22 | 2017-06-20 | 中国十七冶集团有限公司 | Large span steel truss installation method |
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| CN106869319A (en) * | 2017-01-22 | 2017-06-20 | 中国十七冶集团有限公司 | Large span steel truss installation method |
| CN109353448A (en) * | 2018-10-29 | 2019-02-19 | 上海外高桥造船有限公司 | Boat segmental tread flaking method |
| JP2020090799A (en) * | 2018-12-03 | 2020-06-11 | 株式会社竹中工務店 | Architectural structure |
| JP7152282B2 (en) | 2018-12-03 | 2022-10-12 | 株式会社竹中工務店 | Building |
| CN109653513A (en) * | 2019-01-09 | 2019-04-19 | 中国五冶集团有限公司 | A kind of large-scale 7 font truss structure turn-over hanging method |
| CN110424745A (en) * | 2019-08-19 | 2019-11-08 | 中国二十二冶集团有限公司 | The assembled moulding bed of spacial special-shaped steel pipe truss and its assembly, installation method |
| CN115162534A (en) * | 2022-06-23 | 2022-10-11 | 中国建筑第二工程局有限公司 | Construction method of large-span special-shaped truss ceiling |
| CN115162534B (en) * | 2022-06-23 | 2023-07-21 | 中国建筑第二工程局有限公司 | Construction method of large-span special-shaped truss ceiling |
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