CN111719867A - Lower lifting point lifting device and lower lifting point integrated integral lifting method - Google Patents
Lower lifting point lifting device and lower lifting point integrated integral lifting method Download PDFInfo
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- CN111719867A CN111719867A CN202010587661.4A CN202010587661A CN111719867A CN 111719867 A CN111719867 A CN 111719867A CN 202010587661 A CN202010587661 A CN 202010587661A CN 111719867 A CN111719867 A CN 111719867A
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- lifting
- truss
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/142—Means in or on the elements for connecting same to handling apparatus
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C25/00—Cranes not provided for in groups B66C17/00 - B66C23/00
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/14—Conveying or assembling building elements
- E04G21/16—Tools or apparatus
- E04G21/162—Handles to carry construction blocks
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention provides a lower lifting point lifting device and a lower lifting point integrated integral lifting method, and relates to the field of steel structure engineering, wherein the lifting devices are symmetrically distributed on the periphery of a truss, and the lower lifting point lifting device comprises a lifting support, a hydraulic lifter, a steel strand, a lifting plate and two groups of connecting rods; promote the truss whole to the design elevation, carry out the member welding and two sets of upper chords to the mouth department again, with the construction volume and the construction degree of difficulty of the on-the-spot high latitude of greatly reduced, reduce construction cost.
Description
Technical Field
The invention relates to the field of steel structure engineering, in particular to a lower lifting point lifting device and a lower lifting point integrated integral lifting method.
Background
The truss structure is a beam-type member, which is an open-web girder consisting of a plurality of small-section rod pieces and is a statically determinate structure; because the section of the beam can be made very high, the beam has large bending resistance and small deflection, so that the beam is suitable for the span larger than that of a solid web girder, and the beam saves materials and has small self weight; truss structures are commonly used in large-span public buildings such as factory buildings, exhibition halls, gymnasiums and bridges; due to the roof structure, which is mostly used for construction, the truss is often also referred to as roof truss.
The truss often accomplishes the main part welding on ground, recycles lifting device and puts it hoist and mount in place, and the tradition way: the conventional temporary hoisting point for spatial structure hoisting is in a structural form that three temporary rods are converged into a hoisting point (namely a hoisting point), and the hoisting point is in a perforated welding ball structure; the three temporary rods of the structure are dismantled after being lifted in place, and the perforated welding ball non-standard part needs to be specially customized.
The construction method has the following defects: firstly, the construction difficulty is high, and the installation in-place difficulty is high; secondly, the deformation control difficulty in the lifting process is high; thirdly, the construction cost is high; fourthly, the construction period is long.
Disclosure of Invention
The invention aims to solve the technical problems of overcoming the defects in the prior art and providing a lower lifting point lifting device and a lower lifting point integrated integral lifting method, so that a large amount of high-altitude disassembly work after lifting in place is greatly reduced, and the construction period is saved; and the construction amount and the construction difficulty of the high altitude of the site are reduced, and the construction cost is reduced.
The invention is realized by the following technical scheme: the utility model provides a lower hoisting point hoisting device, this hoisting device symmetric distribution is around the truss, lower hoisting point hoisting device is including promoting the support, hydraulic pressure lifting mechanism, the steel strand wires, hanger plate and two sets of connecting rod, it fixes on the bracket at stand top to promote the support, hydraulic pressure lifting mechanism fixes on promoting the support, hydraulic pressure lifting mechanism upwards stimulates the steel strand wires, the lower extreme fixed connection of hanger plate and steel strand wires, the lower chord fixed connection in hanger plate and the truss outside, hanger plate and hydraulic pressure lifting mechanism coincide in vertical direction, two sets of connecting rods are located the tip of truss, the one end of connecting rod and the middle part fixed connection of lower chord, the other end of connecting rod and the first steel ball fixed connection in the truss outside, static definite structure is constituteed to connecting rod and truss.
The invention simplifies the form of the hoisting point, saves three temporary rod pieces, reduces the measure amount of the temporary structure, greatly reduces a large amount of high-altitude disassembly work after the hoisting in place and saves the construction period; promote the truss whole to the design elevation, carry out the member welding and two sets of upper chords to the mouth department again, with the construction volume and the construction degree of difficulty of the on-the-spot high latitude of greatly reduced, reduce construction cost.
According to the technical scheme, preferably, the hanging plate comprises the inserting plate and the lifting appliance which are detachably connected, the inserting plate is vertically inserted into the lower chord outside the truss, the inserting plate is fixedly connected with the lower chord, the lifting appliance is fixedly connected with the lower end of the steel strand, the inserting plate is permanently arranged in the lower chord, the lifting appliance is detachably connected with the inserting plate, and then on the basis of guaranteeing the structural strength, the construction is convenient for workers.
According to the technical scheme, preferably, when the lifting device is used for lifting, the connecting rod is used as a temporary suspender, so that the deformation problem of the truss in the lifting process is effectively inhibited; when the truss is hoisted in place, the connecting rods are used as reinforcing rods, and therefore the overall strength of the outer side of the truss is effectively enhanced.
A lower lifting point integrated integral lifting method uses a lower lifting point lifting device, and comprises the following steps:
fixedly mounting a lifting support on a bracket at the top of the upright post, and sequentially mounting a hydraulic lifter and a steel strand;
removing two groups of upper chords on the outer side of the truss, cutting the set length of the lower chords, welding two groups of connecting rods, vertically inserting an inserting plate into the lower chords at the end of the truss, fixedly connecting the inserting plate with the lower chords, fixedly connecting a lifting appliance with the lower ends of the steel strands, and detachably connecting the inserting plate with the lifting appliance;
the hydraulic lifter around the truss pulls the steel strand upwards, and the steel strand drives the truss to integrally lift upwards;
the truss is lifted to a set elevation, the two groups of upper chords, the intercepting sections of the lower chords and the truss end balls are welded in a repair mode, the two ends of the upper chords are fixedly connected with the truss end balls and the first steel balls respectively, the steel balls at the upper end portions of the upper chords are opposite to the stand columns in the vertical direction, and the central axis of the intercepting sections is coincident with the central axis of the lower chords.
The invention has the beneficial effects that: the invention simplifies the form of the hoisting point, saves three temporary rod pieces, reduces the measure amount of the temporary structure, greatly reduces a large amount of high-altitude disassembly work after the hoisting in place and saves the construction period; promote the truss whole to the design elevation, carry out the member welding and two sets of upper chords to the mouth department again, with the construction volume and the construction degree of difficulty of the on-the-spot high latitude of greatly reduced, reduce construction cost.
Drawings
Fig. 1 shows a schematic structural diagram of hoisting according to an embodiment of the invention.
Fig. 2 shows a schematic structural diagram after hoisting according to an embodiment of the invention.
Fig. 3 shows a schematic structural view of a connection between a hanger plate and a truss according to an embodiment of the present invention.
Fig. 4 shows a schematic structural view of a hanger plate in an embodiment in accordance with the invention.
Fig. 5 shows a lifting bracket top deformation diagram according to an embodiment of the invention.
FIG. 6 shows a lifting bracket stress ratio diagram according to an embodiment of the invention.
FIG. 7 illustrates a finite element analysis diagram according to an embodiment of the invention.
Fig. 8 shows a distribution diagram of lifting points when lifting a truss according to an embodiment of the invention.
In the figure: 1. lifting the support; 2. a hydraulic lifter; 3. steel strand wires; 4. a hanger plate; 5. a connecting rod; 6. inserting plates; 7. a spreader; 8. a lower chord; 9. a truss; 10. a first steel ball; 11. a bracket; 12. a column; 13. intercepting a section; 14. an upper chord; 15. the truss end ball.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and preferred embodiments.
As shown in the figure, the invention provides a lower lifting point lifting device which is symmetrically distributed on the periphery of a truss 9, the lower lifting point lifting device comprises a lifting support 1, a hydraulic lifter 2, a steel strand 3, a lifting plate 4 and two groups of connecting rods 5, wherein the lifting support 1 is fixed on a bracket 11 at the top of an upright post 12, the hydraulic lifter 2 is fixed on the lifting support 1, the hydraulic lifter 2 pulls the steel strand 3 upwards, the lifting plate 4 comprises an inserting plate 6 and a lifting appliance 7 which are detachably connected, the inserting plate 6 is vertically inserted into a lower chord 8 at the outer side of the truss 9, the inserting plate 6 is fixedly connected with the lower chord 8, the lifting appliance 7 is fixedly connected with the lower end of the steel strand 3, the inserting plate 6 is permanently stored in the lower chord 8, the lifting appliance 7 is detachably connected with the inserting plate 6, the construction of workers is convenient on the basis of ensuring the structural strength, the lifting appliance 7 and the hydraulic lifter 2 are overlapped in the vertical direction, two sets of connecting rods 5 are located the tip of truss 9, and the one end of connecting rod 5 and the middle part fixed connection of lower chord 8, the other end of connecting rod 5 and the first steel ball 10 fixed connection in the truss 9 outside, connecting rod 5 and truss 9 constitute statically determinate structure.
Furthermore, when the lifting is carried out, the connecting rod 5 is used as a temporary suspender, so that the deformation problem of the truss 9 in the lifting process can be effectively inhibited; when the truss is hoisted in place, the connecting rods 5 are used as reinforcing rods, and therefore the overall strength of the truss 9 is effectively enhanced.
A lower lifting point integrated integral lifting method uses the lower lifting point lifting device, and the working process comprises the following steps:
(1) fixedly mounting a lifting support 1 on a bracket 11 at the top of an upright post 12, and sequentially mounting a hydraulic lifter 2 and a steel strand 3;
(2) removing the two groups of upper chords 14 on the outer side of the truss 9, cutting a cutting section 13 with a set length of the lower chord 8, wherein the cutting section 13 is preferably the length within the range of 1.25m from the center of the upright post 12, vertically inserting the inserting plate 6 into the lower chord 8 at the end of the truss 9, wherein the position is about 1.7m from the center of the upright post 12, fixedly connecting the inserting plate 6 with the lower chord 8, welding the two groups of connecting rods, fixedly connecting the lifting appliance 7 with the lower end of the steel strand 3, and detachably connecting the inserting plate 6 with the lifting appliance 7;
(3) the hydraulic lifter 2 around the truss 9 pulls the steel strand 3 upwards, and the steel strand 3 drives the truss 9 to integrally lift upwards;
(4) the truss 9 is lifted to a set elevation, two groups of upper chords 14, the intercepting sections 13 of the lower chords 8 and the truss end balls 15 are welded in a repair mode, the two ends of the upper chords 14 are fixedly connected with the truss end balls 15 and the first steel balls 10 respectively, the steel balls at the upper end portions of the upper chords are opposite to the stand columns 12 in the vertical direction, and the central axis of the intercepting sections 13 is overlapped with the central axis of the lower chords 8.
The stress calculation process for the lifting bracket 1 at the top of the column 12 is as follows:
as shown in fig. 5 and 6, the lifting support 1 and the upright post 12 (preferably, a steel pipe concrete column) are subjected to integral modeling calculation, the maximum lifting load is 940KN, the horizontal load (the maximum counter force 938KN of the lifting point) is 5% of the vertical load, the load division coefficient is 1.4, and as a result, the top horizontal displacement of the lifting support 1 is about 44 mm; the lifting end is bent downwards by about 18 mm; and the maximum stress ratio of the rod piece is about 0.71 to 0.9, so that the construction requirement is met.
As shown in fig. 7, during the lifting process, the maximum loads 931KN (200 ton lower hanger 7) and 453KN (60 ton lower hanger 7) are applied to the lower hanger, and by considering the load division coefficient of 1.4 times and through finite element analysis, the stress of the lower hanger is below 220MPa except for partial stress concentration, and the lifting requirement is met (the material of the hanger is Q345B steel).
As shown in fig. 8, according to the madars software simulation lifting force analysis, a plurality of groups of lifting point lifting devices are uniformly arranged on the top of the upright column.
The invention has the beneficial effects that: the invention simplifies the form of the hoisting point, saves three temporary rod pieces, reduces the measure amount of the temporary structure, greatly reduces a large amount of high-altitude disassembly work after the hoisting in place and saves the construction period; lifting the truss 9 to the designed elevation integrally, welding the rod piece at the opening and two groups of upper chords 14, greatly reducing the construction amount and the construction difficulty of the high altitude of the site, and reducing the construction cost.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (4)
1. The utility model provides a lower hoisting point hoisting device, this hoisting device symmetric distribution is around the truss, its characterized in that, lower hoisting point hoisting device is including promoting support, hydraulic pressure lifting mechanism, steel strand wires, hanger plate and two sets of connecting rods, it fixes on the bracket at stand top to promote the support, hydraulic pressure lifting mechanism fixes on promoting the support, hydraulic pressure lifting mechanism upwards stimulates the steel strand wires, the lower extreme fixed connection of hanger plate and steel strand wires, the lower chord fixed connection in hanger plate and the truss outside, hanger plate and hydraulic pressure lifting mechanism coincide, and is two sets of in vertical direction the connecting rod is located the tip of truss, the one end of connecting rod and the middle part fixed connection of lower chord, the other end of connecting rod and the first steel ball fixed connection in the truss outside, static definite structure is constituteed to connecting rod and truss.
2. A lower lifting point lifting device as claimed in claim 1, wherein the lifting plate comprises an insert plate and a lifting appliance which are detachably connected, the insert plate is vertically inserted into the lower chord outside the truss, the insert plate is fixedly connected with the lower chord, and the lifting appliance is fixedly connected with the lower end of the steel strand.
3. A lower lifting point lifting device according to claim 2, characterized in that the connecting rod is used as a temporary boom when lifting; when the hoisting is in place, the connecting rod is used as a reinforcing rod.
4. A lower suspension point integrated integral lifting method, which is characterized in that the lower suspension point lifting device of claim 3 is used, and comprises the following steps:
fixedly mounting a lifting support on a bracket at the top of the upright post, and sequentially mounting a hydraulic lifter and a steel strand;
removing two groups of upper chords on the outer side of the truss, cutting the set length of the lower chords, vertically inserting an inserting plate into the lower chords at the end of the truss, fixedly connecting the inserting plate with the lower chords, welding two groups of connecting rods, fixedly connecting the lifting appliance with the lower ends of the steel strands, and detachably connecting the inserting plate with the lifting appliance;
the hydraulic lifter around the truss pulls the steel strand upwards, and the steel strand drives the truss to integrally lift upwards;
the truss promotes to set for the elevation, and the intercepting section and the truss end ball of two sets of upper chords, lower chord are repair-welded, and the both ends of upper chord this moment respectively with truss end ball and first steel ball fixed connection, in vertical direction the tip steel ball is just to the stand, the central axis of intercepting section and the central axis coincidence of lower chord.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010587661.4A CN111719867A (en) | 2020-06-24 | 2020-06-24 | Lower lifting point lifting device and lower lifting point integrated integral lifting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010587661.4A CN111719867A (en) | 2020-06-24 | 2020-06-24 | Lower lifting point lifting device and lower lifting point integrated integral lifting method |
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| CN111719867A true CN111719867A (en) | 2020-09-29 |
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| CN202010587661.4A Pending CN111719867A (en) | 2020-06-24 | 2020-06-24 | Lower lifting point lifting device and lower lifting point integrated integral lifting method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112573341A (en) * | 2020-12-05 | 2021-03-30 | 李昇 | Column top hoisting mechanism and construction method thereof |
| CN113666284A (en) * | 2021-08-23 | 2021-11-19 | 中建八局发展建设有限公司 | Hydraulic lifting construction method for outdoor truss steel structure |
| CN114525846A (en) * | 2021-12-09 | 2022-05-24 | 北京建工集团有限责任公司 | Mounting method of unequal-elevation steel truss structure |
| CN116654761A (en) * | 2023-07-04 | 2023-08-29 | 北京建工集团有限责任公司 | Rooting device with hoisting and temporary fixing functions and use method thereof |
-
2020
- 2020-06-24 CN CN202010587661.4A patent/CN111719867A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112573341A (en) * | 2020-12-05 | 2021-03-30 | 李昇 | Column top hoisting mechanism and construction method thereof |
| CN113666284A (en) * | 2021-08-23 | 2021-11-19 | 中建八局发展建设有限公司 | Hydraulic lifting construction method for outdoor truss steel structure |
| CN114525846A (en) * | 2021-12-09 | 2022-05-24 | 北京建工集团有限责任公司 | Mounting method of unequal-elevation steel truss structure |
| CN116654761A (en) * | 2023-07-04 | 2023-08-29 | 北京建工集团有限责任公司 | Rooting device with hoisting and temporary fixing functions and use method thereof |
| CN116654761B (en) * | 2023-07-04 | 2024-01-26 | 北京建工集团有限责任公司 | Rooting device with hoisting and temporary fixing functions and use method thereof |
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