CN111852036A - Sliding hoisting method for long-span pipe truss structure - Google Patents
Sliding hoisting method for long-span pipe truss structure Download PDFInfo
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- CN111852036A CN111852036A CN202010636460.9A CN202010636460A CN111852036A CN 111852036 A CN111852036 A CN 111852036A CN 202010636460 A CN202010636460 A CN 202010636460A CN 111852036 A CN111852036 A CN 111852036A
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- sliding
- unit
- truss
- jig frame
- support
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
- E04C3/11—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with non-parallel upper and lower edges, e.g. roof trusses
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a sliding hoisting method for a long-span pipe truss structure, which comprises the following steps: dividing a steel structure into a plurality of units according to the number of trusses and the number of grids; secondly, dividing the weight of each unit into a plurality of sections; thirdly, arranging a walking tower crane and a track for sliding of the jig frame along the vertical direction of the truss; manufacturing a detachable jig frame according to the division of the units, and moving the jig frame to the design position of the truss unit through traction; step five, the walking tower crane walks to the position close to the assembly unit, sequentially hoists the required subsections to the sliding jig frame, removes the support of the sliding jig frame after assembling and welding the units into a unit, and directly places the assembly unit at the position of the designed support; sixthly, the walking tower crane walks to a pulling point at the position close to the assembly unit to be pulled to slide at the same elevation, and the support is fixed; and assembling unit by unit, and sliding in a split manner until the construction of the whole steel structure is completed. The large-span truss system is directly put in place at a design position, and the precision is easy to guarantee.
Description
Technical Field
The invention belongs to the technical field of hoisting, and particularly relates to a sliding hoisting method for a long-span pipe truss structure.
Background
Along with social progress, a large-span space structure is developed vigorously, the span is larger and larger, the modeling is more and more novel and unique, and the technical requirements on installation and construction are higher and higher. In actual construction, projects with large span, weight and installation height exist, the ground cannot bear impact force generated during hoisting of a crane, and the crane cannot be installed by adopting a conventional method.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a sliding hoisting method for a long-span pipe truss structure.
The invention solves the technical problems through the following technical means: the method for hoisting the truss structure of the large-span pipe in a sliding manner comprises the following steps:
dividing a steel structure into a plurality of units according to the number of trusses and the number of grids;
secondly, dividing the weight of each unit into a plurality of sections;
thirdly, arranging a walking tower crane and a track for sliding of the jig frame along the vertical direction of the truss;
manufacturing detachable jig frames according to the division of the units, connecting the jig frames into a whole, and moving the jig frames to the design positions of the truss units through traction;
step five, the walking tower crane walks to the position close to the assembly unit, sequentially hoists the required subsections to the sliding jig frame, removes the support of the sliding jig frame after assembling and welding the units into a unit, and directly places the assembly unit at the position of the designed support;
Sliding the jig frame to the position of the next assembly unit along the rail in an idle-load manner through a pulley block, and forming the assembly jig frame of the next unit through adjustment and modification to be temporarily fixed with the floor or the ground; when the walking tower crane walks to a pulling point at the position close to the assembly unit, the assembly unit is pulled to perform equal-elevation sliding, and after the sliding unit slides to a design position, a sliding track is removed, and a support is fixed; and assembling unit by unit, and sliding in a split manner until the construction of the whole steel structure is completed.
Further, each unit must be no less than two trusses or two meshes.
Furthermore, on the ground axis of the designed position of the rail fixing steel structure, a pressing plate is used for pressing the lower wing plate of the rail, a nut is screwed and fixed on the original foundation bolt, and the rail is welded and fixed on the embedded iron plate and the pressing plate.
Further, the rail connection is rigid connection.
The invention has the beneficial effects that:
the large-span truss system is directly put in place at a designed position, and the installation precision of the support is easy to guarantee.
And (II) the requirements on hoisting equipment and traction equipment are not high, and a small crane or a winch can be used, even not used. And only partial splicing supports need to be erected, and if platforms are available at the end parts of the building, scaffolds can not be erected.
The floor or ground structure of truss lower part can be fully utilized, the mounting height of the structure is reduced, meanwhile, a large number of scaffold and scaffold taking and dismounting personnel are not needed, the equipment investment cost is reduced, the processes of hoisting, assembling, welding, measurement correction, painting and the like of the roof steel structure can be repeatedly carried out on the same jig frame by adopting the process, the mounting quality of the roof can be improved, the construction operating condition is improved, and the safety in the construction process can be increased.
Drawings
FIG. 1 is an embodiment slip process flow diagram;
FIG. 2 is a schematic illustration of an example scaffold (fetal membrane);
FIG. 3 is an assembled cross-sectional view of an embodiment primary truss;
FIG. 4 is a schematic illustration of the fastening of the embodiment rails;
FIG. 5 is a schematic illustration of the connection between the rails of the embodiment;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
As shown in fig. 1 to 3, the method for hoisting the large-span pipe truss structure in a sliding manner comprises the following steps:
dividing a steel structure into a plurality of units according to the number of trusses and the number of grids, wherein each unit is not less than two trusses or two grids;
secondly, dividing the weight of each unit into a plurality of sections;
thirdly, arranging a walking tower crane and a track for sliding of the jig frame along the vertical direction of the truss; on the ground axis of the designed position of the rail fixing steel structure, a pressing plate is used for pressing a lower wing plate of the rail, nuts are screwed and fixed on the original foundation bolts, the rail is welded and fixed on the embedded iron plate and the pressing plate, and the rail is connected rigidly.
Manufacturing detachable jig frames according to the division of the units, connecting the jig frames into a whole, and moving the jig frames to the design positions of the truss units through traction;
step five, the walking tower crane walks to the position close to the assembly unit, sequentially hoists the required subsections to the sliding jig frame, removes the support of the sliding jig frame after assembling and welding the units into a unit, and directly places the assembly unit at the position of the designed support;
sliding the jig frame to the position of the next assembly unit along the rail in an idle-load manner through a pulley block, and forming the assembly jig frame of the next unit through adjustment and modification to be temporarily fixed with the floor or the ground; when the walking tower crane walks to a pulling point at the position close to the assembly unit, the assembly unit is pulled to perform equal-elevation sliding, and after the sliding unit slides to a design position, a sliding track is removed, and a support is fixed; and assembling unit by unit, and sliding in a split manner until the construction of the whole steel structure is completed.
The technical scheme has the following characteristics: the large-span truss system is directly put in place at a designed position, and the installation precision of the support is easy to guarantee.
And (II) the requirements on hoisting equipment and traction equipment are not high, and a small crane or a winch can be used, even not used. And only partial splicing supports need to be erected, and if platforms are available at the end parts of the building, scaffolds can not be erected.
The floor or ground structure of truss lower part can be fully utilized, the mounting height of the structure is reduced, meanwhile, a large number of scaffold and scaffold taking and dismounting personnel are not needed, the equipment investment cost is reduced, the processes of hoisting, assembling, welding, measurement correction, painting and the like of the roof steel structure can be repeatedly carried out on the same jig frame by adopting the process, the mounting quality of the roof can be improved, the construction operating condition is improved, and the safety in the construction process can be increased.
The specific construction process is as follows:
and (I) placing a ground sample on the platform, and after the ground feet are placed flat, placing expansion bolts on corresponding positions to play a positioning role.
(II) building an assembly tire membrane on a site corresponding to the main truss, wherein the building of the tire membrane is carried out according to the following drawing: after the scaffold (the moulding bed) is built, 5 measuring points are arranged along the longitudinal direction of the truss, and the corresponding elevation position is determined (meanwhile, the mounted pre-arch 1/500 is considered).
Thirdly, compounding longitudinal and transverse axes and elevations by using a theodolite, timely processing the found problems, and popping out a truss installation position line;
(IV) a slideway making method: connecting the two into a whole by using crane beams, and directly fixing the two onto a short column of a pipe truss base;
fifthly, after the horizontal force is eliminated, the horizontal force can be aligned to the datum line steel ball support after sliding in place, and the jack is clamped on the support plate and is gradually jacked up; positioning bolts or positioning steel plates can be added on the pre-buried plates;
sixthly, controlling the translation process, namely adjusting the height and controlling the speed by adopting a single-bar sliding method, and simultaneously paying attention to the change condition of the truss at any moment;
(seventh) in-position control: when the truss support is in place, the jack is loosened to enable the truss support to slowly fall on the arc support, and the falling speed of the support is well controlled.
(eighth), after the lower chord and the upper chord are in place and adjusted, all the auxiliary rods are assembled in place, tack welding is carried out, corresponding data are measured and recorded by a theodolite and a leveling instrument, after the data are qualified, intersecting line welding seams of the main chord and the auxiliary rods are welded, and the welding sequence is carried out according to corresponding welding process rules to prevent serious welding deformation and distortion deformation of the truss.
(nine) truss paint construction: and before the truss does not leave the jig frame, spraying primer and paint in the middle layer on the truss as early as possible according to the design requirements of a drawing, and uniformly spraying finish after the truss is installed in place.
(ten) control of the translation process:
1. the fixing mode of the track is as follows: the rail is fixed on the axes of the 10-shaft column and the 17-shaft column, the lower wing plate of the rail is pressed by the pressing plate, and the nut is screwed and fixed on the original foundation bolt. And meanwhile, the rail is welded and fixed on the embedded iron plate and the pressing plate.
2. Connection between the tracks: the rail connection is rigid. The web plates between each section of crane rails are fixedly connected by 2M 16 multiplied by 5510.95 high-strength bolts, the wing plates are fixedly welded, and the nodes are supported by 20# I-steel in the sliding process.
3. Prevention of rail lateral movement: the firm and reliable connection between the track and the embedded part of the column is ensured. And the track is supported by scaffold steel pipes on the walkway to prevent lateral movement.
4. And (3) treatment of a sliding contact surface: two pieces of round steel with the diameter of 20mm are welded at the bottom of each truss support and are placed in parallel with the track, so that the contact area between the truss support and the track is reduced. Grease was added during the slip process to reduce the contact surface coefficient of friction.
5. Selection of the sliding power: in the scheme, two trusses slide simultaneously, 4 supports of the two trusses are traction nodes of the chain block in order to ensure coordination and unification of the trusses in the sliding process, each node is dragged by a 5t chain block, and 4 chain blocks are arranged in total. The other end of the hoist is fixed on the concrete columns with 10 shafts and 17 shafts by a steel wire rope.
And (3) calculating the friction force: the self weight of the truss is about 25T
Coefficient of friction of steel: no lubrication: 0.15;
traction force: 0.15 × 25T ═ 3.75T < 5T;
the method comprises the following steps: 0.1; traction force: 0.1 × 25T ═ 2.5T < 5T
Therefore, the 5T hoist is used as traction power to meet the requirement.
6. Controlling the truss sliding speed: due to the large span of the truss, a commander carries out coordinated control on the sliding speeds of the two sides on the 5-layer middle platform, and the truss supports on the two sides can slide at similar speeds on the track. The staff on the track of both sides need listen to commander's commander, guarantees that the relative displacement of both sides is controlled within 5 cm.
7. Deformation control of the truss: the truss has large span and weight, and is easy to deform in sliding, so various measures are taken to prevent the truss from deforming.
Firstly, upper chord pipes of every two trusses are connected and fixed by 5 root system rods;
and secondly, 4 oppositely-pulled and obliquely-pulled steel wire ropes are arranged among 4 supports of the lower chord and are tensioned by a hoist, so that the lower chord of the truss is prevented from being unfolded outwards, and the stability of a sliding plane of the track is ensured.
(eleven) in-position control:
1. installing the truss in place: before the truss is in place, roof truss beams above the walkways on the 10-axis and 17-axis sides are reinforced, 20# I-steel serves as a support to prop against the beam ends, and spot welding is conducted for fixation. After the truss slides in place, each ball support is hung on a roof truss beam by a 10t hand hoist, the truss is pulled by a hoist to be lifted, and 2 hoists are needed for lifting on one side.
2. Hoisting:
17, the two ball supports on the axis are integrally lifted to enable one side of the truss to be away from the track for a certain height.
And secondly, after the truss leaves the track, the track is dismounted, and dirt on the embedded part is cleaned.
And thirdly, installing a rubber pad on the support according to the design requirement.
And fourthly, integrally lowering the truss onto the embedded support, and screwing down the foundation bolt after positioning.
Hoisting one side of the 10-axis by the same method.
The large-span pipe truss structure sliding hoisting method provided by the technical scheme has wide application range, and specifically comprises the following steps:
large span single span, multi-span space truss or net rack structure with complex supporting condition
And (II) the building plane is a rectangular, trapezoidal or polygonal isoplanar.
The supporting condition (III) can be the condition of simple peripheral support, or the condition of combining point support and peripheral support.
And fourthly, when the building plane is rectangular, the slide rails can be arranged on the ring beams at two sides to realize two-point traction.
And fifthly, when the span is large, a sliding rail can be additionally arranged in the middle to realize three-point or four-point traction, so that the net rack does not need to be subjected to bending increase after splitting, or when the span is large, the problem can be solved by adopting a method of adding a counter beam.
Sixthly, construction is carried out in areas such as narrow sites and mountain areas; is also suitable for crossing construction; such as replacement of workshop roofs, steel rolling, parallel construction of equipment foundations, equipment and roof structures in plants of machinery and the like.
It is noted that, in this document, relational terms such as first and second, and the like, if any, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (4)
1. The method for hoisting the large-span pipe truss structure in a sliding manner is characterized by comprising the following steps of: dividing a steel structure into a plurality of units according to the number of trusses and the number of grids;
secondly, dividing the weight of each unit into a plurality of sections;
thirdly, arranging a walking tower crane and a track for sliding of the jig frame along the vertical direction of the truss;
manufacturing detachable jig frames according to the division of the units, connecting the jig frames into a whole, and moving the jig frames to the design positions of the truss units through traction;
step five, the walking tower crane walks to the position close to the assembly unit, sequentially hoists the required subsections to the sliding jig frame, removes the support of the sliding jig frame after assembling and welding the units into a unit, and directly places the assembly unit at the position of the designed support;
sliding the jig frame to the position of the next assembly unit along the rail in an idle-load manner through a pulley block, and forming the assembly jig frame of the next unit through adjustment and modification to be temporarily fixed with the floor or the ground; when the walking tower crane walks to a pulling point at the position close to the assembly unit, the assembly unit is pulled to perform equal-elevation sliding, and after the sliding unit slides to a design position, a sliding track is removed, and a support is fixed; and assembling unit by unit, and sliding in a split manner until the construction of the whole steel structure is completed.
2. The method for slipping and hoisting the long-span pipe truss structure according to claim 1, wherein each unit has no less than two trusses or two grids.
3. The method for hoisting the longspan pipe truss structure in a sliding manner according to claim 2, wherein a pressing plate is used for pressing a lower wing plate of the rail on the ground axis of the design position of the rail fixing steel structure, nuts are screwed and fixed on the original foundation bolts, and the rail is welded and fixed on the embedded iron plate and the pressing plate.
4. The large-span pipe truss structure slipping hoisting method according to claim 3, wherein the rail connection is a rigid connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010636460.9A CN111852036A (en) | 2020-07-03 | 2020-07-03 | Sliding hoisting method for long-span pipe truss structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010636460.9A CN111852036A (en) | 2020-07-03 | 2020-07-03 | Sliding hoisting method for long-span pipe truss structure |
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| CN111852036A true CN111852036A (en) | 2020-10-30 |
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| CN202010636460.9A Pending CN111852036A (en) | 2020-07-03 | 2020-07-03 | Sliding hoisting method for long-span pipe truss structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117052137A (en) * | 2023-07-25 | 2023-11-14 | 上海宝冶集团有限公司 | Large grid steel structure sliding installation device and construction method thereof |
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| CN101451383A (en) * | 2008-12-25 | 2009-06-10 | 中国建筑第八工程局有限公司 | Sliding construction method of large span steel structure roof |
| CN101725255A (en) * | 2009-11-13 | 2010-06-09 | 高申甫 | Segmental slipping and assembling process of overhead large-span steel structure |
| CN201786002U (en) * | 2010-06-02 | 2011-04-06 | 中建钢构有限公司 | Sliding jig for construction of large-span steel structure |
| JP2015161125A (en) * | 2014-02-27 | 2015-09-07 | 大成建設株式会社 | Plumbing adjustment method and building |
| CN208702174U (en) * | 2018-08-31 | 2019-04-05 | 中冶建工集团有限公司 | A kind of Node In Large-span Pipe Truss roof truss air translation mounting bracket system |
-
2020
- 2020-07-03 CN CN202010636460.9A patent/CN111852036A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101451383A (en) * | 2008-12-25 | 2009-06-10 | 中国建筑第八工程局有限公司 | Sliding construction method of large span steel structure roof |
| CN101725255A (en) * | 2009-11-13 | 2010-06-09 | 高申甫 | Segmental slipping and assembling process of overhead large-span steel structure |
| CN201786002U (en) * | 2010-06-02 | 2011-04-06 | 中建钢构有限公司 | Sliding jig for construction of large-span steel structure |
| JP2015161125A (en) * | 2014-02-27 | 2015-09-07 | 大成建設株式会社 | Plumbing adjustment method and building |
| CN208702174U (en) * | 2018-08-31 | 2019-04-05 | 中冶建工集团有限公司 | A kind of Node In Large-span Pipe Truss roof truss air translation mounting bracket system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117052137A (en) * | 2023-07-25 | 2023-11-14 | 上海宝冶集团有限公司 | Large grid steel structure sliding installation device and construction method thereof |
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