CN102108786B - Overall lifting construction method of ultra-large type building member and device thereof - Google Patents

Overall lifting construction method of ultra-large type building member and device thereof Download PDF

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Publication number
CN102108786B
CN102108786B CN201010595642A CN201010595642A CN102108786B CN 102108786 B CN102108786 B CN 102108786B CN 201010595642 A CN201010595642 A CN 201010595642A CN 201010595642 A CN201010595642 A CN 201010595642A CN 102108786 B CN102108786 B CN 102108786B
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China
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lifting
platform
lifting arm
building
screw thread
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CN201010595642A
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Chinese (zh)
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CN102108786A (en
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王狄龙
陆鑫苗
张观华
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浙江省天和建材集团有限公司
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Abstract

The invention relates to an overall lifting construction method of an ultra-large type building member and a device thereof, and the construction method comprises the following steps: A) preparation stage: building up a lifting platform, placing a jack on the lifting platform and mounting threaded lifting rods and load-lasting rods; B) lifting stage: 1) starting the jack to enable a piston to ascend one stroke, and then screwing threaded anchors on the lifting rods and the load-lasting rods downwards; 2) performing no-load oil return on the jack, and then screwing the anchor of the lifting rod for lifting the upper part of a steel beam downwards, and 3) sequentially repeating the steps 1) and 2) till the member is lifted to be slightly higher than a placing hole on the lifting platform, then inserting the placing steel beam, and further placing the member on the placing steel beam; and C) fixing stage: setting a permanent support upright post, and finally fixing the member on the upright post. The lifting device comprises the jack and the lifting platform, as well as a plurality of the threaded lifting rods and the threaded load-lasting rods. The process and the device are simple,the cost is low, the lifting process has no intervals, the speed is uniform, the lifting process is smooth and safe, and the process and the device can be used for lifting ultra-large tonnage, ultra-long and ultra-wide, any height and multi-pivot point building members.

Description

Ultra-large type building element construction method for lifting whole and device thereof

Technical field

The invention belongs to the method for improving and the device thereof of object, especially relate to on-the-spot construction method for lifting whole of a kind of ultra-large type building element and device thereof.

Background technology

The lifting of existing large-scale, ultra-large type building element; The general large-tonnage loop wheel machine that adopts carries out integral hoisting, but large-tonnage loop wheel machine volume is big, weight is also big, often will receive the restriction of place and road during use; Some construction site can't be used, and expense is higher; Also have through building and promote the method that support adopts the punching jack to match with prestress wire and promote; As; Chinese invention patent application specification (number of patent application: CN200810207806.2) disclose a kind of integral hoisting system for superaltitude overlong jumbo beam by truss method and construction method thereof; Said system comprises lifting support, formwork truss and promotes power system; Said formwork truss comprises fixedly truss of main body truss and end, and said end fixedly truss is fixed on the vertical structure of huge beam both sides, and said lifting support is fixedly set in two ends fixedly on the truss; Said lifting power system is fixed in and promotes on the support, and said lifting power system is connected with the main body truss through promoting steel strand.System architecture is complicated, deficiencies such as cost is high, operation is inconvenient, safety is low, long construction period but this type method for improving exists.

Summary of the invention

The present invention solves above-mentioned technical matters; Provide that a kind of technology is simple with device, cost is low, promote midway not at interval, hoisting speed evenly, promote that thing is steady, safety factor is high; Can promote super-tonnage, super-long and super-wide, a kind of ultra-large type building element construction method for lifting whole and the device thereof of the building element of arbitrary height, many fulcrums.

Above-mentioned technical matters of the present invention mainly is able to solve through following technical proposals:

A kind of ultra-large type building element construction method for lifting whole may further comprise the steps:

A, new field of technical activity: the structure according to building element is set up hoist point; Build lifting platform at each hoist point; Hydraulic jack is placed on the platform of lifting platform; Load onto screw thread ground tackle and pad (annotate: all ground tackle places of mentioning include pad in following this specification sheets) after the upper end of at least two screw thread lifting arms being passed the through hole of platform and pressure-bearing girder steel; Also load onto the screw thread ground tackle after passing the through hole that promotes on the girder steel then, be placed on the piston of hydraulic jack, the lower end of lifting arm is fixed on the building element promoting girder steel; The lower end that an above screw thread is held the lotus bar is fixed on the building element, screws on the screw thread ground tackle with holding after the through hole on the platform is passed in lotus bar upper end;

1), start electric oil pump and promote jack piston and rise B, improvement stage:; After jack piston is covered a stroke, with pressure-bearing girder steel on the lifting arm and promote ground tackle and the screw thread ground tackle of holding lotus bar upper end between the girder steel and be rotated down to platform and lean with lifting platform; 2), with the unloaded oil return of jack and make and promote girder steel and fall after rise synchronously with jack piston, the screw thread ground tackle that will promote the lifting arm above the girder steel then is rotated down to the upper surface with the lifting girder steel and leans; 3), repeat above-mentioned 1 successively), 2) step until building element is risen to a little more than on the lifting platform shelve hole or rest stand height after stop; To shelve girder steel then inserts in shelving hole or rest stand; Again with the unloaded oil return of jack, be placed in building element and shelve on the girder steel;

C, fixed building element stages: the nonvolatil support post of building element is set, treat that column is accomplished after, mention building element with jack again, extract out then and shelve crossbeam, be shelved on building element on the column at last and fix.

As preferably, described screw thread lifting arm is made up of last lifting arm and following lifting arm, links into an integrated entity with adaptor union; Described hold the lotus bar by on hold the lotus bar with under hold the lotus bar and form; Link into an integrated entity with mating connector; In the described new field of technical activity, load onto screw thread ground tackle and pad after earlier the through hole of platform and pressure-bearing girder steel being passed in the upper end of lifting arm on the screw thread, also load onto the screw thread ground tackle after passing the through hole that promotes on the girder steel then; The lower end of following lifting arm is fixed on the building element, and the other end that will go up lifting arm and following lifting arm then is connected them with adaptor union; Screw on the screw thread ground tackle with holding on the screw thread after the through hole on the platform is passed in lotus bar upper end, the lower end of holding the lotus bar under the screw thread be fixed on the building element, then will on hold the lotus bar and with adaptor union they be connected with the other end of time holding the lotus bar.In the above-mentioned improvement stage; When lifting arm when holding adaptor union on the lotus bar and rise near platform; Unload lower connector, down lifting arm and hold the lotus bar down and with building element transfer be fixed to lifting arm and on hold on the lotus bar; Repeat above-mentioned 1 then successively), 2) step continue to promote building element, up to a little more than on the lifting platform shelve hole or rest stand height after stop.

As preferably, described lifting platform is the lifting platform of concreting, during the fixed building member, the part of the lifting platform of shelving the crossbeam below is built up the nonvolatil support post of building element with concrete casting.

A kind of bont of ultra-large type building element integral hoisting construction; Comprise the lifting platform that jack, pillar and platform constitute, also comprise some screw thread force rods, described screw thread force rod is held the lotus bar by screw thread lifting arm and screw thread and is formed; Platform is provided with the through hole that supplies force rod to pass through; Described jack is placed on the platform, is placed with the lifting girder steel on the piston of jack, promotes on the girder steel and has through hole; The described lotus bar of holding passes the through hole on the platform; Described lifting arm passes on the platform and the through hole that promotes on the girder steel successively, the lifting arm of platform top and hold and be rotary with the screw thread ground tackle on the lotus bar, and described lifting arm and the lower end of holding the lotus bar are rotary with the screw thread ground tackle of fixed building member.

As preferably, described lifting arm is made up of last lifting arm and following lifting arm, and last lifting arm and following lifting arm link into an integrated entity with special-purpose assorted adaptor union; Described hold the lotus bar by on hold the lotus bar with under hold the lotus bar and form, link into an integrated entity with special-purpose assorted adaptor union.Because force rod rises with building element synchronously when promoting building element, when building element was thus lifted to higher height, the part that force rod extends upwardly out from flat surface can be very high; Both dangerous, therefore also influence operation is divided into two sections with force rod; Middle with the connection of detouchable adaptor union, when the adaptor union on the force rod rises near platform, unload lower connector and lower stress bar; The building element commentaries on classics is fixed on the force rod, exceeds the flat-bed height to reduce force rod.But the height of working as the required lifting of building element is not high, and when force rod was not very long, force rod can adopt whole force rod.

As preferably; Described lifting platform is built with concrete material and is formed, and is placed with the pressure-bearing girder steel on the platform, and the below of pressure-bearing girder steel is lined with billet; Described hydraulic jack is placed on the pressure-bearing girder steel, has the through hole that supplies lifting arm to pass on the said pressure-bearing girder steel.As the case may be, lifting platform also can adopt steel frame.

As preferably, said lifting arm is a finish rolling deformed bar with holding the lotus bar.

As preferably, described lifting arm with hold lotus bar two ends and expose ground tackle length more than or equal to 20mm.

Therefore, the present invention can promote super-tonnage, super-long and super-wide, the building element of arbitrary height, many fulcrums; Have simple and reasonable for structure; Stability height, good reliability, low cost and other advantages, be specially: 1. can promote building element continuously not at interval midway, hoisting speed is even; The lifting thing is steady, and safety factor is high; 2. the ground tackle of stress point, the adaptor union constructing operation is simple, and stressed member is stressed evenly during whole the lifting, can be according to promoting quantity and the position that the design of thing particular case promotes force rod; 3. lifting means is reusable, promotes stressed member and in lifting process, can not damage; 4. fining twisted steel itself has very big stiffness, and jack unloading back rod member can not drop, and can make full use of the lift stroke of jack; 5. adopting fining twisted steel is the method for improving of force rod, can form the construction of flowing water construction line, can accomplish a Pin, promotes a Pin, from economically also than other method for improving saving of labor, economize duration and cost; 6. can its part be reconstructed into the permanent support post of building after lifting platform uses, realize dual-use material, practice thrift cost greatly, shorten the duration.

Description of drawings

1. accompanying drawing 1 is the front elevation of two bow members of embodiment of the invention lifting;

2. accompanying drawing 2 is upward views of two bow members of embodiment of the invention lifting;

3. accompanying drawing 3 is block diagrams of finish rolling deformed bar and adaptor union thereof;

4. accompanying drawing 4 is bont structural representations of the present invention;

5. accompanying drawing 5 is lifting platform topside scheme drawings of the present invention;

6. accompanying drawing 6 is that bont is arranged scheme drawing on the flat surface of lifting platform of the present invention.

Among the figure: two bow member 1, end points 2, finish rolling deformed bar 3, adaptor union 4, lifting platform 5, pillar 6, platform 7, shelve hole 8, go up lifting arm 9, down lifting arm 10, ground tackle 11, jack 12, platform through hole 13, promote girder steel 14, pressure-bearing girder steel 15, hold lotus bar 16, backing plate 17, promote hole 18, lifting arm 19, pad 20.

The specific embodiment

Pass through embodiment below, and combine accompanying drawing, do further bright specifically technical scheme of the present invention.

Embodiment is the prestress pair bow members 1 (like Fig. 1, shown in 2) of factory building of two bow member structural systems of 50m for on-the-spot lift; Two bow member 1 span 50m; Wide 3.5m; 295 tons of weight, two bow members 1 by 2 independently bow member form, connect into two bow member systems through the linking beam between last arch ring and the lower boom.

4 hoist points of constructional feature selection of the two bow members 1 of hoist point basis, i.e. 4 end points 2 (as shown in Figure 2) of two bow members 1, and the prior lifting hole 18 (as shown in Figure 4) that the lifting force rod is installed of when building 4 end points 2 of pair bow members, leaving.Promote as shown in Figure 3 with force rod; Select the finish rolling deformed bar 3 of commercially available Φ 40 for use, be divided into by its function in lifting and supply jack 12 to promote lifting arm 19 that building elements use and hold 10 two kinds on lotus bar with what building element remained on that the hoisting depth position uses when jack 12 oil returns.Number according to hoist point is selected 8 cover lifting arms for use altogether through engineering calculation, because hoisting depth is higher, every cover lifting arm 19 is made up of with following lifting arm 10 last lifting arm 9, is connected with the special-purpose assorted adaptor union 4 of the finish rolling deformed bar of producer (as shown in Figure 3); Hold the lotus bar equally and also be 8 covers, every cover hold the lotus bar by on hold the lotus bar with under hold the lotus bar and form, also be connected with mating connector.Lifting arm and the total length of holding the lotus bar up and down are 12 meters up and down.Make stress point with the supporting ground tackle of the special-purpose nut shape of fining twisted steel, anchoring coefficient is 0.95.

Like Fig. 4,5, shown in 6; Respectively build the lifting platform 5 of a cement concrete (C25) at each hoist point; Hydraulic jack 12 and a supporting hydraulic electric oil pump of a 250T of configuration, lifting platform 5 is made up of platform 7 and pillar 6, and the platform through hole 13 that can supply force rod to pass and slide is arranged on the platform 7; The aperture of platform through hole 13 is slightly larger than the diameter of force rod, less than the diameter of ground tackle 11 or the width of pad 20.Jack 12 is placed on the platform 7, on the pillar 6 at the hoisting depth place that sets, be provided with insert shelve crossbeam shelve hole 8.Promoting uses jack 12 diameters to be 50cm; Because concrete platform 7 can not satisfy local compression bearing capacity required when promoting; Need place pressure-bearing girder steel 15 (selecting 160 channel beams for use) in jack 12 bottoms; In order to increase the diffusion zone of platform 7 partial pressings, make partially loaded area diffuse to pillar 6, also have the through hole that lets lifting arm 19 pass through accordingly with platform through hole 13 on the pressure-bearing girder steel 15.The fulcrum of pressure-bearing girder steel 15 is arranged near load-bearing pillar 6, and billet 17 on following can the pad of 15 liang of fulcrums of pressure-bearing girder steel is directly delivered on the pillar 6 the most of pressure that produces when promoting, and is not damaged to guarantee platform 7.The pistons end of hydraulic jack 12 is placed with and promotes girder steel 14 (selecting 320 channel beams for use), promotes on the girder steel 14 and has accomplished fluently in advance and platform through hole 13 corresponding through holes.

Dead work before promoting: clean out lifting hole 18 and lifting platform 5 earlier to guarantee that promoting thing rises unobstructed.Clean out the back and lifting arm 19 is installed and is held lotus bar 16, as shown in Figure 4, will descend lifting arm 10 earlier and hold lotus bar (not marking among the figure) down and insert in the lifting hole 18 of two bow member 1 end points 2 bottom installation pad and nut shape screw thread ground tackle 11 with the lifting arm symmetric arrangement.The top in lifting hole 18 is also installed ground tackle 11 and is screwed with two bow members 1, can landing so that descend lifting arm 10 times and hold the lotus bar.Two bow member 1 each end points 2 are adorned 2 covers and are held lotus bar 16, after holding the lotus bar down and installing again will on hold the lotus bar the upper end screw on screw thread ground tackle and pad 20 after passing the platform through hole 13 of lifting platform 5, and be rotated down to lifting platform 5 lean (referring to Fig. 6).Lifting arm 19 with hold lotus bar 16, the length of exposing the ground tackle part is not less than 20mm.

With the upper end of last lifting arm 9 pass promote the through hole of accomplishing fluently in advance on the girder steel 14 after; Load onto the screw thread ground tackle; Each root promotes and adorns 2 upward lifting arms 9 on the girder steel 14; To promote again on the piston tip that girder steel 14 is fixed on hydraulic jack 12; Lift jack 12 and last lifting arm 9 on the lifting platform 5 with hoisting crane, will make the lower end of lifting arm 9 pass on the pressure-bearing girder steel 15 successively and platform through hole 13 (referring to Fig. 5,6) during lifting, and on the lifting arm 19 between pressure-bearing girder steel 15 and the lifting girder steel 14, screw on ground tackle 11.

At last with every cover lifting arm and hold the lotus bar up and down and be connected up and down with adaptor union 4.Two bow members 1 two ends are totally 4 hoist points; Each hoist point is equipped with one group of 2 cover lifting arm 19 and one group of 2 cover held lotus bar 16; In the lifting process lifting arm 19 with hold lotus bar 16 and replace and stressedly rise simultaneously; And insurance each other has one group of rod member to be locked by ground tackle, even when the mechanical equipment et out of order, still can guarantee safety all the time in lifting process.

All behind the lifting means installation in position, need debug, make the work speed of each lifting means consistent, the error of abatement apparatus itself.Must try to promote before the formal lifting, with the inspection lifting means, the service condition of commander and communication system and lifting thing, lifting platform, support etc. have or not abnormal condition etc.

During lifting, start earlier electric oil pump and promote jack 12 pistons and rise, simultaneously lifting arm 19 with hold lotus bar 16 along with two bow members 1 rise together; When jack 12 pistons rise; To in time observe the working condition of each valve; Note observing the pressure fuel pump meter reading, pressure gauge reading directly reflects the stressing conditions of hoist point, and compression indicator will remain in the force value of permission during lifting; If any abnormal condition, can continue construction after the eliminating.Each lifting means should be synchronous in lifting in the lifting process, and the hoisting depth gap of adjacent two hoist points of homonymy must not be greater than 10 millimeters, and the lifting difference of each suspension centre of both sides must not be greater than 50 millimeters.Occur stopping construction immediately when difference is excessive, continue to promote construction again after adjusting within the permissible error value.

After the piston of jack 12 is covered a stroke; The screw thread ground tackle of holding lotus bar 16 of platform 7 tops is screwed down; Promptly rotate to platform 7 and lean, so that after making hydraulic jack 12 unloaded oil returns, two bow members 1 are hung on lifting platform 5 through holding lotus bar 16 and ground tackle thereof.Also can also be screwed down simultaneously in order to improve safety being equipped with ground tackle 11 on the lifting arm 19 between pressure-bearing girder steel 15 and the lifting girder steel 14.

Then with hydraulic jack 12 unloaded oil returns; Jack piston retracts to original position; Promote girder steel 14 and also fall the screw thread ground tackle of girder steel 14 top lifting arms 19 (promote this moment still in position) with piston synchronously after rise, oil return speed will be consistent, and each hoist point is landed synchronously.To promote then girder steel 14 top lifting arms 19 screw thread ground tackles 11 be rotated down to lifting girder steel 14 upper surfaces lean so that jack 12 carries out the lifting of next stroke.

And then start the rising of electric oil pump promotion jack 12 pistons, so cycle repeats constantly promotes two bow members 1.When lifting arm 19 when holding adaptor union 4 on the lotus bar 16 and rise near platform 7 for lower go up lifting arm 9 with on hold the height of lotus bar exposure platform 7; Simultaneously adaptor union 4 be also because of its diameter can't pass through greater than through hole 13, need unload lower connector 4, down lifting arm 10 and under hold the lotus bar and with two bow members 1 be transferred to lifting arm 9 and on hold on the lotus bar.When the first transfer lever 9 on enhancing and upgrading confined beams 15 beams 14 and 11 between the anchor rod holding charge on top of the platform 7 backspin anchorage 11 abut against the platform 7, from double arch Remove the lower rack a holding charge connector rod and 4, and then lift the lever holding charge on its lower end into the double arch an improved anchorage holes 18 and 11 re-fixed; then remove from under a double arch lifting lever 10 and its connector 4, then lift the lift lever 9 on the lower end of its double arch an improved insertion hole 18 and 11 re-fixed anchorage to complete the transfer work.

Transit working is accomplished continued and is promoted two bow members 1; Rise to exceed until two bow members 1 and shelve absolute altitude 50mm position; On lifting platform 5, reserve then shelve to insert shelved crossbeam in the hole 8 in, and again with each hoist point hydraulic jack 12 oil return, landing synchronously is placed on pair bow members 1 and shelves on the crossbeam.To shelve lifting platform 5 parts of crossbeam below then and water the nonvolatil column of smashing into the two bow members 1 of support; After treating that column reaches intensity; Mention two bow members 1 with hydraulic jack 12 again; Crossbeam is shelved in extraction, two bow members 1 is shelved on two bow member columns also fixes at last, accomplishes whole lifting construction.

Above embodiment is for the embodiment of building element hoisting depth when higher, when the height that promotes is not high; Be force rod when not being very long, force rod can adopt whole force rod, and force rod if adopt lifting arm a kind of just can accomplish to promote construct; Need not to be provided with and hold the lotus bar; When jack needs unloaded oil return,, just can building element be remained on the height that has promoted in the lifting process through being screwed down the ground tackle between the pressure-bearing girder steel and lifting girder steel on the lifting arm; Accomplish the unloaded oil return of jack, continue then to promote; Certainly if again configuration to hold the safety of lotus bar better.

Claims (7)

1. ultra-large type building element construction method for lifting whole is characterized in that may further comprise the steps:
A, new field of technical activity: the structure according to building element is set up hoist point; Build the lifting platform of concreting at each hoist point; Hydraulic jack is placed on the platform of lifting platform, loads onto screw thread ground tackle and pad after the upper end of at least two screw thread lifting arms being passed the through hole of platform and pressure-bearing girder steel, also load onto the screw thread ground tackle after passing the through hole that promotes on the girder steel then; Be placed on the piston of hydraulic jack promoting girder steel; The lower end of lifting arm is fixed on the building element, and the lower end that an above screw thread is held the lotus bar is fixed on the building element, screws on the screw thread ground tackle with holding after the through hole on the platform is passed in lotus bar upper end;
1), start electric oil pump and promote jack piston and rise B, improvement stage:; After jack piston is covered a stroke, with pressure-bearing girder steel on the lifting arm and promote ground tackle and the screw thread ground tackle of holding lotus bar upper end between the girder steel and be rotated down to platform and lean with lifting platform; 2), with the unloaded oil return of jack and make and promote girder steel and fall after rise synchronously with jack piston, the screw thread ground tackle that will promote the lifting arm above the girder steel then is rotated down to the upper surface with the lifting girder steel and leans; 3), repeat above-mentioned 1 successively), 2) step until building element is risen to a little more than on the lifting platform shelve hole or rest stand height after stop; To shelve crossbeam then inserts in shelving hole or rest stand; Again with the unloaded oil return of jack, be placed in building element and shelve on the crossbeam;
C, fixed building element stages: the lifting platform part that will shelve the crossbeam below builds up the nonvolatil support post of building element with concrete casting; After treating that column is accomplished; Mention building element with jack again, extract out then and shelve crossbeam, building element is shelved on the column also fixes at last.
2. ultra-large type building element construction method for lifting whole according to claim 1 is characterized in that, described screw thread lifting arm is made up of last lifting arm and following lifting arm, links into an integrated entity with adaptor union; Described hold the lotus bar by on hold the lotus bar with under hold the lotus bar and form; Link into an integrated entity with mating connector; In the described new field of technical activity, load onto screw thread ground tackle and pad after earlier the through hole of platform and pressure-bearing girder steel being passed in the upper end of lifting arm on the screw thread, also load onto the screw thread ground tackle after passing the through hole that promotes on the girder steel then; The lower end of following lifting arm is fixed on the building element, and the other end that will go up lifting arm and following lifting arm then is connected them with adaptor union; Screw on the screw thread ground tackle with holding on the screw thread after the through hole on the platform is passed in lotus bar upper end, the lower end of holding the lotus bar under the screw thread be fixed on the building element, then will on hold the lotus bar and with adaptor union they be connected with the other end of time holding the lotus bar; In the described improvement stage; When lifting arm when holding adaptor union on the lotus bar and rise near platform; Unload lower connector, down lifting arm and hold the lotus bar down and with building element transfer be fixed to lifting arm and on hold on the lotus bar; Repeat above-mentioned 1 then successively), 2) step continue to promote building element, up to a little more than on the lifting platform shelve hole or rest stand height after stop.
3. the bont of a ultra-large type building element integral hoisting construction comprises the lifting platform that jack, pillar and platform constitute, and it is characterized in that; Also comprise some screw thread force rods, described screw thread force rod is held the lotus bar by screw thread lifting arm and screw thread and is formed, and platform is provided with the through hole that supplies force rod to pass through; Described jack is placed on the platform; Be placed with the lifting girder steel on the piston of jack, promote on the girder steel and have through hole, the described lotus bar of holding passes the through hole on the platform; Described lifting arm passes on the platform successively and promotes the through hole on the girder steel; The lifting arm of platform top and hold and be rotary with the screw thread ground tackle on the lotus bar, described lifting arm and the lower end of holding the lotus bar are rotary with the screw thread ground tackle of fixed building member, and described lifting platform is built with concrete material and formed; On the pillar of setting the hoisting depth place, be provided with and insert the hole of shelving of shelving crossbeam.
4. bont according to claim 3 is characterized in that, described lifting arm is made up of last lifting arm and following lifting arm, and last lifting arm links into an integrated entity with special-purpose assorted adaptor union with following lifting arm; Described hold the lotus bar by on hold the lotus bar with under hold the lotus bar and form, link into an integrated entity with special-purpose assorted adaptor union.
5. bont according to claim 3; It is characterized in that be placed with the pressure-bearing girder steel on the described platform, the below of pressure-bearing girder steel is lined with billet; Described jack is placed on the pressure-bearing girder steel, has the through hole that supplies lifting arm to pass on the said pressure-bearing girder steel.
6. according to claim 3 or 4 or 5 described bonts, it is characterized in that said lifting arm is a finish rolling deformed bar with holding the lotus bar.
7. bont according to claim 6 is characterized in that, described lifting arm with hold lotus bar two ends and expose ground tackle length more than or equal to 20mm.
CN201010595642A 2010-12-09 2010-12-09 Overall lifting construction method of ultra-large type building member and device thereof CN102108786B (en)

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