CN107055347B - A kind of Tower crane disassembly structures and methods of high-rise installation - Google Patents

Abstract

The present invention discloses a kind of Tower crane disassembly structures and methods of high-rise installation, tower crane is fixed using cantilever steel girder structure by the outside of any floor in skyscraper and roofing is hung, mounting structure is novel, tower crane can not be installed and the defects of roofing hangs structure at roof by overcoming " people " font skyscraper, selection is installed fixed tower crane and roofing from the floor for needing to carry out building operation by way of installing cantilever steel girder and hung, after tower crane fulfils assignment, capable dismounting is lifted up into by roofing, fixed form is simple, it is novel, and it may be mounted at the outside of any floor, Installation Flexibility is strong, the installation of renovation and external equipment especially for the building for having completed agent structure, without being hung from ground installation tower crane and roofing, greatly save installation cost and running cost that tower crane and roofing are hung.

Description

A kind of Tower crane disassembly structures and methods of high-rise installation

Technical field

The present invention relates to the dismounting side of technical field of building construction, more particularly to a kind of tower crane installed in intermediate floor Formula.

Background technology

Tower crane is a kind of crane gear also known as " derrick crane " the most frequently used on construction site, with a section spreading (height) (referred to as " standard knot "), for hanging the raw material of the constructions such as working reinforcing bar, wood stupefied, concrete, steel pipe.Tower crane is work A kind of essential equipment on the ground.

In existing building, in order to save the floor space on ground, space is better profited from, it will usually building is built Must be very high, and in order to attractive in appearance, exterior wall, glass can be all installed, the method for being commonly installed glass, it is to install outside indoors, and The roof of glass, particularly " people " font structure is installed for rooftop position, is usually installed, adopted by the way of tower crane In this way, it is necessary to be synchronous with building body construction, and tower crane is typically all to be arranged on ground base cushion cap, passes through ground The pre-buried form of thumb screw is fixed, then increases standard knot and attachment device in primary standard height, due to bulky, weight weight, such as Fruit is attached to Super High top, it is necessary to install many standard knots and attaching frame from ground, if carry out the architectural engineering of small range, Tower crane is installed from ground, many manpower and materials and financial resources can be wasted, wasted time and energy, and building master has been built up for some Body, and roof can not install the structure that tower crane and roofing are hung, to carry out the construction of high-storey, it is necessary to build tower since ground Basis is hung, it is extremely inconvenient, when needing to dismantle tower crane, it may be necessary to build roofing by another seat height building and hang, extremely It is inconvenient.

The content of the invention

For weak point present in above-mentioned technology, present invention offer one kind may be mounted at any one in skyscraper Tower crane disassembly structure on the outside of floor layer, and the method for dismounting to tower crane, it is main to be still in for skyscraper and roof The glass installation of the building of " people " font structure, without being hung from ground installation tower crane and roofing, greatly save disassembly cost.

In order to achieve the above object, a kind of detaching structure of the tower crane of high-rise installation of the present invention, the basic steel of the tower crane Beam is arranged between high-rise floor, and roofing, which is hung, to be also mounted between high-rise floor, and the foundation structure use that roofing is hung is encorbelmented Steel beam structure, the cantilever steel girder include upper box beam, lower box beam, hound, H profile steel and fastener, the upper box Beam is extended out from the core position of building to the edge of building to construction wall, core of the lower box beam from building Position extends to the edge of building, and the upper box beam is led to the marginal position built with lower box beam with the marginal position built Cross fastener and be fixed with H profile steel, connect between the end points of the extension of the upper box beam and lower box beam and the edge of building Be connected to hound, the upper box beam and lower box beam are both provided with two, and two upper box beam is parallel in the horizontal plane sets Put, described two upper box beams be arranged in parallel with lower box beam in vertical direction, and are further fixed on one between two upper box beams Block reinforced slab, four supporting legs that the roofing hangs base are arranged on the extension of two upper box beams.

Wherein, the fastener includes U-shaped anchor ear, the first bolt fastening structure and the second bolt fastening structure, described Upper box beam and the connected mode of building are the first bolt fastening structure and the second bolt fastening structure, the lower box beam with The connected mode of building is U-shaped anchor ear, and the U-shaped anchor ear is by high-strength bolt and rear fender by lower box beam and building Fixed, by the way that top board is placed on above upper box beam, lower platen is placed on building and mixed first bolt fastening structure The lower section of native agent structure is coagulated, concrete main body structure and top board are penetrated by high-strength bolt therebetween and lower platen will Upper box beam is fixed, wherein, the floor for strengthening enabling capabilities, the upper box beam and concrete main body are provided with upper box beam Footing plate is also clamped between structure, the upper box beam is extended building, and the angular position formed with building, also set Anti-back device is equipped with, the top board of second bolt fastening structure is placed on the top of box beam, and lower platen is placed on Below concrete main body structure, footing plate is clamped between upper box beam and concrete main body structure, and high-strength bolt penetrates pressure Plate and lower platen fix upper box beam, at the rear of upper box beam, are provided with reinforcement.

Wherein, the roofing hangs the supporting leg of base, is connected on by carbon dioxide arc welding on top box type beam, and roofing hang base with The place of upper box beam contact is additionally provided with stiffener plate, in order to preferably support whole roofing to hang, in the lower end of reinforced slab also By articulated manner, inner support tie-beam is installed with, and the end set of the upper box beam to stretch out at two has level Tie-beam.

The present invention discloses a kind of Tower crane disassembly method of high-rise installation, is provided with the tower crane of high-rise installation mentioned above Detaching structure, and tower crane and roofing are hung all between the floor of high-rise, its demounting procedure is:First installation is attached together Device, falls section, with the stable tower crane of steel wire rope；Then part counterweight is removed again, is left two pieces of counterweights, room is installed on crane arm Face is hung, the large arm of dismounting crane arm front end, then dismantles the front tension bar of crane arm, and one of match somebody with somebody is unloaded after dismantling leading portion crane arm Weight, after dismounting after the crane arm of part, removes last block counterweight；Afterwards successively remove counter-jib, drivers' cab, transition segment, Remove upper rotary, remove gyration gear ring, lower revolution, remove lifting platform and outer sleeve frame, remove remaining standard knot, finally remove Basic girder steel and cantilever steel girder.

Wherein, in installation attachment device, drop in tower step, roofing first is sling into weighing arm turns on the outside of building, counter-jib To building direction, it is in an angle of 90 degrees with tower crane, prevents tower crane from being collided during by standard knot down handling, Ran Houkai Beginning falls supreme one of the attachment position of standard knot, dismantles and drops section after attachment device again, by tower after following one of the attachment device of dismounting Machine drops to last 3 standard knots, is attached tower body and building with steel wire rope, and connected mode is using on the inside of tower-body standard section Two main device for carrying a tripot burrs are pulled in 45 degree on building connection girder steel laterally around steel wire rope, and the order then removed according to tower crane is torn open Remove.

Wherein, in crane arm demounting procedure, first hung with roofing and dismantle amplitude variation trolley and luffing assembly to ground, then profit Roofing is hung on the lower boom of derrick runway girder front end with amplitude variation trolley, roofing is hung into supporting leg with clamping plate is clamped in lower boom On, hanging on end " people " font crosspoint steel wire rope in roofing, oblique pull is middle to control room with chain block on top boom backward Luffing is hung in face, and main power system is replaced by Lift Mechanism in Power Hoist steel wire rope, and the roofing hangs revolution apart from building edge, tower crane After roofing is sling the outside segment distance of luffing one of weighing arm by crane arm when dismantling, derrick runway girder is rotated by 90 ° to the right to angle and carried out down Work is dropped, lifting performance is hung according to roofing, crane arm front section is carried out in the air to cut arm, then integral demounting hindfoot portion Crane arm.

Wherein, in counter-jib step is dismantled, derrick runway girder left direction time is turn 90 degrees by dismounting after completing crane arm, Now counter-jib is hung in the range of 10 meters apart from roofing, and counterweight installation region is layered on preprepared flitch, above covering peace The whole network is simultaneously tightened, and is respectively connected the corner shackle of raising hoist engine with suspension ring with four length identical lifting ropes, by roofing Suspension hook is sling to lifting rope stress, then gets the bearing pin being connected with hoist engine, and raising hoist engine is hung and opened after being loaded onto ground Beginning integral demounting counter-jib.

Wherein, it is characterised in that also include the demounting procedure of tower cap, in tower cap unloading process, existed with two strap bolts On the hangers of tower crown end, start to loosen tower cap and transition segment connecting bolt after strap is tensed, connecting bolt, which loosens, uses tower crane To dismantle special electric spanner and carry out lever impact, nut is gone to twist and removed after loosening with hand, and connecting bolt is removed with electric wrench, Nut easily comes off under effect of inertia in electric wrench sleeve and smashes following glass curtain wall；Tower cap starts after removing with same Mode dismantle transition segment and drivers' cab, drivers' cab dismounting is relatively easy.

Wherein, slewing tower, in the unloading process of undersetting and slew gear, with the hoisting steel of four equal lengths Cord is banded in four connection otic placodes of upper rotary, is tightened up steel wire rope to stress, is expired boarding in lower revolution in advance, incite somebody to action Turn round connection and loosen removal with high-strength bolt, then gyration gear ring is removed, hang and prized gyration gear ring with crowbar when carrying gyration gear ring One flitch of pad is played, steel wire rope is passed beneath from gear ring, steel wire rope is worn outward from interior, and shackle is closed up, and two steel wire ropes are in pair Angle forms, and places ground, when dismantling lower pivoting support, is bundled in revolution respectively with four steel wire rope square forms and connects with gear ring In the spiro keyhole position connect, station is in stock last time after the high-strength bolt that revolution is connected with standard knot is removed with double offset ring spanner below Turn on platform, bearing pin impact method is identical with crane arm dismounting mode, starts after bearing pin connection in corner is removed under lifting upwards Pivoting support, lifting by crane previous name dismounting work, observation revolution separates situation with standard knot junction in standard knot under revolution, confirms Lifting signal is provided after errorless, roofing hangs driver and starts to lift by crane by a small margin according to signal, confirm safety after can turn round to the left and under Hook, place ground and be transported through work.

Wherein, in cantilever steel girder unloading process, two braces above cantilever steel girder are first lifted up into capable dismounting with roofing, Then two lifting rope bolts are hung on the hangers of cantilever steel girder both ends, by after steel wire rope stress in the middle part of vertical cylinder by lower supporting rod with The connection bearing pin of hold-down support removes, before removing and connecting bearing pin, with a steel wire rope by brace and opposite Core Walls Structure wall Between connect, steel cord ends bolt hang a chain block, the outside impulsive force of hound is controlled with chain block, by bearing pin After impact, chain block is slowly loosened, releases the connection between steel wire rope and chain block to hound in vertical state, Set up U-shaped anchor ear back shroud bolt looseness in advance on the landing stage of scaffold finished, dismantle cover plate, after the completion of detachable cover plate, room Pico- revolution to the left is hung in face, makes U-shaped anchor ear accelerate the lower hook of revolution to ground to transport after departing from concrete column.

The beneficial effects of the invention are as follows：

Compared with prior art, the Tower crane disassembly structure mounting structure of high-rise installation of the invention is novel, overcomes " people " Font skyscraper can not install tower crane at roof and the defects of roofing hangs structure, select from needing to carry out building operation Floor fixed tower crane and roofing are installed by way of cantilever steel girder is installed hung, after tower crane fulfils assignment, hung by roofing To be dismantled, fixed form is simple, novel, and may be mounted at the outside of any floor, and Installation Flexibility is strong, especially for The renovation of the building of agent structure and the installation of external equipment have been completed, without being hung from ground installation tower crane and roofing, Greatly save installation cost and running cost that tower crane and roofing are hung.

Brief description of the drawings

Fig. 1 is that tower crane of the present invention hangs the structural representation being fixed on building with roofing；

Fig. 2 is that roofing of the embodiment of the present invention hangs basic steel girder erection structural representation；

Fig. 3 is the bolt fastening structure of the embodiment of the present invention first；

Fig. 4 is the bolt fastening structure of the embodiment of the present invention second；

Fig. 5 is the U-shaped hooping structure schematic diagram of the embodiment of the present invention；

Fig. 6 is that roofing of the embodiment of the present invention hangs dismounting tower crane structural representation；

Fig. 7 is that the step of roofing of the embodiment of the present invention hangs dismounting tower crane is schemed.

Embodiment

In order to more clearly state the present invention, the present invention is further described below in conjunction with the accompanying drawings.

Refer to Fig. 1-Fig. 2 present invention and disclose a kind of detaching structure of the tower crane of high-rise installation, the basic girder steel peace of tower crane Between the floor of high level, roofing, which is hung, to be also mounted between high-rise floor, and the foundation structure that roofing is hung uses cantilever steel girder Structure, cantilever steel girder include upper box beam 31, lower box beam 32, hound 33, H profile steel 34 and fastener, upper box beam 31 Extended out from the core position of building to the edge of building to construction wall, core position of the lower box beam 32 from building Extend to the edge of building, upper box beam 31 passes through tight with the marginal position and the marginal position of lower box beam 32 and building built It is fixedly mounted with to put and is fixed with H profile steel 34, is connected between the end points of the extension of upper box beam 31 and the edge of lower box beam 32 and building There is hound 33, upper box beam 31 is both provided with two with lower box beam 32, and two upper box beams 31 are parallel in the horizontal plane Set, two upper box beams 31 be arranged in parallel with nowel box beam in vertical direction, and are further fixed on one piece between two upper box beams Reinforced slab, four supporting legs that roofing hangs 1 base are arranged on the extension of two upper box beams 31.

1 surface-based structure is hung with existing tower crane 2 and roofing, tower crane 2 is saved and roofing hangs 1 and is mounted to This and human cost, meanwhile, overcome that " people " font skyscraper can not install tower crane 2 at roof and roofing hangs 1 The defects of structure, select from need carry out build operation floor installed by way of cantilever steel girder is installed fixed tower crane 2 with And roofing hangs 1, after tower crane 2 fulfils assignment, hang 1 by roofing and dismantled, fixed form is simple, novel, and may be mounted at The outside of any floor, Installation Flexibility is strong, renovation and outside especially for the building for having completed agent structure The installation of equipment, 1 is hung without installing tower crane 2 and roofing from ground, greatly save tower crane 2 and roofing hang 1 installation cost with And running cost.

Fig. 3-Fig. 5 is referred to, in the present embodiment, fastener includes U-shaped anchor ear 353, the first bolt fastening structure 351 With the second bolt fastening structure 352, upper box beam 31 and the connected mode of building are the first bolt fastening structure 351 and second Bolt fastening structure 352, the connected mode of lower box beam 32 and building are U-shaped anchor ear 353, and U-shaped anchor ear 353 is by will be high-strength Bolt 4 and rear fender 3531 fix lower box beam 32 with building, and the first bolt fastening structure 351 is by by top board 3511 are placed on the top of box beam 31, and lower platen 3512 is placed on the lower section of building concrete agent structure, therebetween Concrete column structure and top board 3511 and lower platen 3512 are penetrated by high-strength bolt 4 to fix upper box beam 31, its In, the floor 311 of enhancing enabling capabilities is provided with upper box beam 31, is also pressed from both sides between upper box beam 31 and concrete main body structure Hold footing plate 3513, upper box beam 31 extends building, and the angular position formed with building, is additionally provided with anti-back Device 3514, the top board 3521 of the second bolt fastening structure 352 are placed on the top of box beam 31, and lower platen 3522 is placed Below concrete main body structure, footing plate 3523 is clamped between upper box beam 31 and concrete main body structure, high-strength bolt 4 Penetrate top board 3521 and lower platen 3522 to fix upper box beam 31, at the rear of upper box beam 31, be provided with reinforcement 3524。

Fig. 6-Fig. 7 is referred to, in the present embodiment, roofing hangs the supporting leg 11 of 1 base, and top box is connected on by carbon dioxide arc welding On type beam 31, and the place that roofing hangs 1 base with upper box beam 31 contacts is additionally provided with stiffener plate, whole in order to preferably support Individual roofing hangs 1, in the lower end of reinforced slab also by articulated manner, is installed with inner support tie-beam, and stretch out at two The end set of upper box beam 31 have horizontal connection beam.

In the present embodiment, its specific unloading process is, using the dismounting of " people " font roof high-rise as Example, tower crane 2 is arranged on the 48th floor layer main body, the basic girder steel of the above-mentioned detaching structure of tower crane 2, in a pre-installation, first 48 Steel girder erection position concrete structure surface upper marginal position places 1200*700*30mm thickness iron plates between layer A-B axis, to prevent Basic girder steel directly contacts and increased the anti-pressure ability of girder steel lower concrete structure with concrete, and girder steel wide 400mm is with mixing Solidifying soil contact face is smaller and easily damages concrete structure by pressure.Basic girder steel is adopted when being made with No. 8 Axis Cross positions of building Strengthen the moment of flexure of cantilever steel girder with the two-sided long stiffener plates of two-sided 5000*360*25mm；

Before steel beam foundation is outwards encorbelmented, first lower tie-strut upper end is connected with girder steel otic placode bearing pin, lower end Φ 12 Steel wire rope bolt jail, the steel wire rope other end are connected with chain block on building, are lifted up basic girder steel with tower crane, tense hand Cucurbit is drawn, lower supporting rod lower end is drawn in No. 8 axis and surveyed, puts down basic girder steel, lower supporting rod promotes laterally, when being connected to lower support The 1200*700*30mm iron plates of bar bottom reach precalculated position (47 axis centre of floor 8) and use M48*1600 through-wall bolts 4 afterwards Root is by upper and lower iron plate with building to clamping fixed.Connection outside horizontal connection pull bar after two cantilever steel girders install, then it is solid The hound 33 of fixed two cantilever steel girders carrys out immobilizing foundation girder steel or so stability, because that can not install diagonal brace outside the girder steel of left side basis Bar 33, therefore hound 33 is arranged in basic girder steel and surveyed, two hounds 33 diagonally form the progress of bridging formula.Girt Connected with hound 33 using both ends pin type, pin diameter is the types of Φ 50, and internal overarm support is fixed on building connection otic placode Beams of concrete lateral surface, it is fixed on and is built using M24*500*8.8 level harness cord high-strength bolt bar planting modes because 8 axis cantilever thickness are larger Build on thing.Folder position is returned back to top with national standard 400*400*20*4000 types H profile steel 34 with girder steel in 8 axis concrete structures, The lower end of H profile steel 34 is identical with last layer by the use of 30mm steel plates as footing plate, connected mode.

In order to control basic girder steel in the case where roofing hangs 1 active force backward or front slide, in girder steel lower end and 8 axis intersections The limits device of a 200*400*30 type is welded elevationally outward, and limits device is supported to building concrete structure outer ledge Weld 3 pieces of triangles at 7 axis and girder steel the position girder steel rear that crosses afterwards with footing plate junction and strengthen strength plates, with footing plate four Individual bolt fixed force controls the outside Slideslip of girder steel.

Security platform is set up with scaffolding steel pipe level on basic girder steel, the face scaffolding height of platform three is not less than 1.8 The guard rail of rice, the pin that plane makes of bamboo plate are taken off Man Tang and are paved with, and two cantilever steel girder spacing are 4 meters, outrigger platform 6 Rice, there is 1 meter of operating space per face, meet construction requirement.

In order to prevent to encorbelment, construction platform side stress causes to turn on one's side, and 8# iron wire multiple tracks will be used between steel pipe and outrigger platform Upper strata is compressed with steel pipe after the full hall bedding of binding connection, it is ensured that levels operation platform safety is errorless.Horizontal overall mao bamboon must not harrow There are hanging phenomenon or hanging point to must not exceed 20 centimeters, it is necessary to which more people detect mounting platform and guard rail is firm and solid reliable, protection Rail height must not be less than 1.8 meters, should there is the safety suspension point that safety belt is hung above installation position, and safety belt hitch point is adopted Formed with Φ 13mm steel wire ropes and 120*120*2000 square through-pipes, specific method is before square through-pipe vertically is welded on into operating platform End, on horizontal bolt steel wire rope to the structural columns in vertical square through-pipe upper end, in safety steel cable centre position using bundle head lock Circle mode carries out more than 4 safety loops, and safety belt tie point is buckled in safety loop, even if safety steel cable outer end is because of other Reason come off do not interfere with yet safety belt protection work cause the accident of falling at high altitude.Roofing hangs 1 basic installation and carried out Four directions carries out roofing after checking and accepting and hangs 1 installation again.

In the present embodiment, 1 dismounting tower crane is hung with 12T roofings, 12T roofings hang 1 basis can not pacify on inhering architecture Dress, considers two 15000*400*400 box beams of outwards being encorbelmented on beam slab face between 48 layers of A-B axles, and box beam stretches out building 6 meters of beyond the region of objective existence side, inside 9 meters of building edge, in box beam and horizontal building beam intersection using high-strength bolt to pressing from both sides mode Fixed box beam, box beam, which is outwards encorbelmented, uses diagonal brace between Φ 152*16mm seamless steel pipes and 47 layers of building below position. 12T roofings are hung 1 and are arranged on cantilever steel girder outer fix, it is 3800*4400mm that 12T roofings, which hang 1 key dimension, i.e., outside building It is 3500mm that lateral edges hang 1 centre distance with roofing.1 is hung first in upward 7 meters of foundation for tower crane place peace with the 12T roofings installed One of attachment device is filled to consolidate the stability after tower crane removes upper attachment together.Then 1 is hung with 12T roofings to tear tower crane counterweight open Except 4 pieces (3 pieces of 1.64T, 1 piece of 1.0T), stay one piece of 1.64T and one piece of 2T counterweight, progressively removed after crane arm is removed tower cap, on Revolution, gear ring, lower revolution, set body panel, stock and standard component and basic girder steel etc..

Using 12T roofings 1 is hung after the completion of tower crane dismounting 6T roofings are hung into 1 base be lifted on 48 layers of A axis toward B axle line position 2 meters of positions of skew are vertically installed by one 400*440*20 types H profile steel 34, the lower end footing plate of H profile steel 34 and concrete structure Beam is formed with M48*8.8 levels high-strength bolt 4 to folder, upper end is completed with welding on the outside of horizontal connection beam, and vertical H is consolidated with this Type swings.In the vertical inner side of H profile steel 34 with the tilting of 300*300*16 types H profile steel 34 and 7 axis beam faces in advance to pressing from both sides shape Into firm banking connected with otic placode, increase horizontal beam and vertical H profile steel 34 because 6T roofings hang 1 hang carry caused by outside hang load Change caused by torque, 6T roofings hang the outside pulling force of 1 brace as 7 tons, and downward pressure is 4 tons, and building pulling force and pressure are equal Can carrying.12T roofings hang and the segmentation cut-out of basic girder steel are adjusted into ground after the completion of 1 dismounting.First in 6T rooms when dismounting 6T roofings hang 1 1 overhung, one long chain block of 5T*10 rice is hung in face, and 6T roofings are hung into 1 with chain block is adjusted to 48 laminate faces, crane arm point Into 9 sections, hoist engine bulk-breaking is transported to ground with hand fork lifter by indoor elevator, last place cleaning, completes to remove work.

Specifically operate and be：

Installation for attachment device：In the present embodiment, the tower crane that need to be dismantled uses overhanging type steel frame beam foundation, no base Plinth ballast, weight of basis itself are unable to reach the power of toppling of control tower crane, and original design is mounted with one 4 at basic upward 13 meters The attachment device of bar pull bar, when tower crane drop section arrives attachment position, derrick runway girder to basis still has 21 meters of height, and tower crane is inclined Covering torque, still some are big, for the sake of security, one of attachment device, attachment drawing are installed again at upward 7 meters places of foundation for tower crane section Bar tie point is placed on the column of the vertical steel construction of agent structure, and original installation remains stationary as with the tensile structure on the inside of column, tower Machine dismantle 1 meter place attachment device after continue drop section to 7 meters place adhere to again attachment device until by tower crane drop save be 3 standard knot height Spend (8.4 meters).Machine remove before first in the attachment device of four pull bars of the upward 7 meters of places installation one in tower body basis, stablized with this Stability after tower crane dismounting one of attachment above.By roofing hang 1 crane arm turn to building on the outside of, counter-jib to building object space To, be in an angle of 90 degrees with tower crane, prevention tower crane collided during by standard knot down handling.Then start to fall standard Supreme one of attachment position is saved, drops and saves at 7 meters again after dismounting attachment device, drop tower crane after dismantling following one of attachment device To last 3 standard knots, tower body and building are attached with Φ 20mm steel wire ropes, connected mode is using in tower-body standard section The main device for carrying a tripot burr in side two is pulled in 45 degree on building connection girder steel laterally around steel wire rope, the order then removed according to tower crane Remove.

During tower crane carries out drop section, the coordinating and unifying is answered in action, and two people respectively see one respectively when jacking cylinder is in place Mark time, confirm that the operable oil cylinder driven valve in safe rear jacks upwards, confirm that overlord adopts and can entered after selling out complete open during decline Row receives cylinder.Personnel forbid station on the outside of standard knot when standard knot is outwards drawn, can after confirmation safety and correct wear safety belt Linked up with and gone on platform to introduce wheel work.

The dismounting of counterweight：This dismounting operation carries out dismounting operation, tower crane drop from QTZ80.12 type roof-type cranes Stop revolution to right-hand rotation, crane arm to roofing is hung into 1 crane arm after minimum with one meter remote apart from tower crane counter-jib, turning round Rotational speed is controlled minimum in journey, prevention roofing, which hangs 1 crane arm inertia force, causes roofing to hang 1 crane arm and tower crane counter-jib Collide.Slowly outside luffing, now roofing, which hangs 1 suspension hook and is in highest and hangs, carries position, and lifting rope uses length as 1 meter of lifting The suspender belt progress for 3T is measured, is connected under suspender belt with 5T shackles with counterweight suspension ring, when hanging first piece of counterweight of load, weight is 1000KG, roofing, which hangs 1 amplitude peak, to be allowed to hang load 2.7T, and satisfaction is hung load and required.Roofing hangs 1 rings center and last block counterweight Block suspension ring hang load in vertical state, and suspension hook is lifted to after balancing weight lower end is higher by counter-jib railing and turns round 180 degree to the left upwards, so Hook is descended afterwards to ground.Same mode is hung except other counterweights, is stayed last block 2T and 1.64T to match somebody with somebody and is focused on counter-jib.Treat by before Hang except 1.64T counterweights, hung after crane arm is removed completely except last block 2T counterweights again after the completion of the large arm dismounting of 20 meters of end.With During hanging load again, the counter-jib position for having hung load counterweight is in cavity position, notices that prevention personnel fall from cavity position, people Member safety belt must be suspended on safely and effectively can not have collision it is possible be such as brace medium position, safety belt suspension Rope length degree is not enough it is contemplated that lengthen the rope of equivalent specifications quality or select to wear the safety rope of 3 meters of length, it is ensured that safety is applied Work.

Specific dismounting mode is as follows:

Tower crane will be highly 8.4 meters of tower bodies after tower, and it is 12.4 meters to add rotating assembly and transition segment, counter-jib rearward end distance It is 21.5 meters that roofing, which hangs 1 and effectively hangs load distance, it is allowed to which it is 3T to hang loading capability, and satisfaction hangs load operating mode.

Roofing hangs 1 hoisting sling and lifts special strap or steel wire cable using 5T, and hoist cable is connected with counterweight suspension ring uses 5T Shackle is attached, and hangs one piece of load every time.

Roofing is hung into 1 crane arm and returns back to tower crane counter-jib end balancing weight top, adjustment suspension hook and last block counterweight Hoist cable is connected by the perpendicularity of block, lower hook with balancing weight, then will be hung load and be tensed, and it is existing whether observation balancing weight latch blocks As, confirm lifting upwards again after safety, pay attention to observing between counterweight and equalizer bar and try not have friction, prevention balancing weight corner Concrete block have because of collision aequum small-sized lump depart from pound to following cladding glass caused by finished product destroy.

When balancing weight lifts by crane upwards observe tower body stability and oblique pull steel wire rope rate of tension and corner protector whether come off and Injure steel wire rope.

First piece of counterweight is transferred to ground, hang carry second piece of counterweight when, lifting 10 centimeters after by roofing hang 1 crane arm to Outer luffing causes two pieces of balancing weight separation, piece flitch of traverse between two pieces of balancing weights, and two people stand on the platform of both sides, hold wood Side, prevent mutually to hit between balance weight, stay one piece of 1.64T and 2T to match somebody with somebody after same method four pieces of counterweights of dismounting and focus on counter-jib On, treat dismantling one piece of 1.64T counterweight after the completion of preceding 20 meters of counterweights dismounting, crane arm dismantles last again after the completion of all dismantling Block 2T balancing weights.

When balancing weight is dismantled, workmen's safety belt must be suspended on place that is fixed limited and can not being collided by counterweight, Such as brace medium position, inadequate be contemplated that of safety belt bolt lanyard length lengthen the rope of bolt lanyard equivalent specifications, but Overall incremental sizes can not be more than 3 meters, and connection is limited, and two safety cock lanyards must distinguish bolt extension, prevent once safety rope Because the injured safety of collision cannot be protected.

Counterweight is covered weighted regions with flitch after all dismantling, and flitch is connected with counter-jib to be carried out with iron wire Tighten, prevent flitch high-altitude from departing from.It is tensioned above flitch with double layer security net, safety net is tensed between iron wire and platform, in advance Anti- falling from high altitude, it is ensured that safety

Crane arm unloading process：The tower crane Edge Distance building edge A axis centres distance of this dismounting is 13 meters, room Face hangs 1 10 meters of crane arm direction lower end, and the jib length that need to be dismantled is 45 meters, and center suspension centre is 21 meters, and roofing hangs 1 revolution It it is 3.5 meters apart from building edge.Because roofing hangs 1 smaller with the distance between building, derrick runway girder need to be by room when dismantling Face, which hangs the outside luffing of 1 crane arm derrick runway girder could be rotated by 90 ° to angle to the right to 20 meters, carries out decline work, according to roofing Hang 1 lifting performance Mr. table, roofing, which hangs 1 lifting performance in 20 meters of luffing, can not meet integral demounting requirement, therefore consider will 20 meters carry out cutting arm in the air before crane arm, then 25 meters of crane arms after integral demounting, and roofing hangs 1 satisfaction and hangs load requirement.

Specifically dismounting mode is：First hang 1 with roofing to dismantle amplitude variation trolley and luffing assembly to ground, small using luffing The type 6T roofings of Φ 80 are hung 1 and are arranged under tower crane Section 8 crane arm front end on device for carrying a tripot bar by car, and 6T roofings are hung into 1 supporting leg with clamping plate presss from both sides Tightly on lower device for carrying a tripot bar, 6T roofings hang 1 upper end " people " font crosspoint Φ 18mm steel wire ropes backward oblique pull on upper device for carrying a tripot bar, in Between with 5T chain blocks control 6T roofings hang 1 luffing, main power system is replaced by Lift Mechanism in Power Hoist steel wire rope.Risen in first segment Weighing arm root and 6T roofings, which are hung, respectively installs a fixed pulley on device for carrying a tripot bar on 1 position, main rope is passed through from tower cap pulley and passed through First segment crane arm and gin pole, which glide, to take turns to the downward bolt of gin pole top pulleys and is wound on that to be disassembled crane arm center to the front, is split Unload crane arm and depart from bearing pin and keep light state before weight below, in the case where being disassembled crane arm and gin pole installation crane arm horizontal web member it Between be attached with 2T chain blocks, connected after 3 and 6T roofings hung into 1 pico- 10 centimeters of luffing forward after bearing pins are all got, Then 2T chain blocks are loosened, it is inclined after crane arm completely disengages the crane arm being attached thereto to being disassembled, remove 2T Hoist rope is started downwards to ground after chain block, rope made of hemp bolt is hung over into root on the crane arm being disassembled before dismounting Portion, control crane arm turn round in the air, prevent the fracture caused by lifting revolution of arm destroys hoist rope and accident occurs.

After the completion of the dismounting of Section 10 crane arm, 6T roofings are hung into 1 shifting and are filled on Section 8 crane arm, roofing is then hung 1 Lifting rope bolt at 22 meters of the derrick runway girder on device for carrying a tripot bar, by crane arm to after hanging oneself and carrying 50 centimeters, with tower crane main rope in tower cap Front tension bar is tensed in top pulleys and gets connection bearing pin (method of strike bearing pin is identical with dismounting crane arm bearing pin), slowly Front tension bar is placed on derrick runway girder on device for carrying a tripot bar and first tightened with 8# iron wires, then with 8mm wire cable strengthenings, pull bar is removed and connects Pin axle, hang 1 with 6T roofings and crane arm and segmentation pull bar are hung by section and be loaded onto ground, dismounting mode is identical with dismounting first segment. 1 lifting rope is hung by roofing is loosened after the completion of 20 meters of dismountings before crane arm, is hung except counterweight below stays one piece of 2T, then dismounting is surplus Remaining 25 meters of crane arms.25 meters of crane arms are disposably dismantled, before dismounting that rope made of hemp bolt is downward in crane arm front end, are risen for aerial Weighing arm direction in the air and it is anti-beat strands, after crane arm disengaging bearing pin is connected, roofing is hung into 1 outside luffing, by a small margin to Right-hand rotation to crane arm can move right in being moved down with former 90 degree of directions of crane arm, and ground retains 2 people's above controlling parties Xiang Sheng, direction rope and ground-angle are 60 degree, and dynamics controls according to crane arm in direction in midair, accomplishes hanging object with hanging Hook does not turn round and does not collide building.Crane arm dismounting before by root and other be possible to building collide place all Wrapped up with old cotton-wadded quilt, it is ensured that curtain wall finished product is not damaged by.

In crane arm unloading process, all personnel must wear the safety belt of double safeguard protections, two bolt lanyard difference Bolt hangs over home at two, and underfooting must stand firm, and when loosening 6T roofings hang the connection protection 2T chain blocks under 1, personnel squat On the inside of crane arm, it is paved with above lower horizontal covering and brace with flitch and bundlees firm, personnel are sitting on flitch, prevent steel wire The impulsive force injury workmen that rope slides.First split pin is connected with brace with iron wire before bearing pin impact, then uses hand hammer Gently impact removes split pin.After split pin removes, passed around and tightened from split pin hole position with 10# iron wires, other end and oblique abdomen Bar connects, and is first gently impacted with sledgehammer, tries the tight ness rating of bearing pin, as it is relatively tight and with sledgehammer tap it is several under treat that bearing pin has been put down under Tapped after device for carrying a tripot bar with hand hammer, another people withstands bearing pin one on the outside of device for carrying a tripot bar with palm, and prevention bearing pin is caused by impulsive force is too quickly Come off.Big hand hammer two people during being used alternatingly hold hammer handle, and by small-sized safety rope and crane arm of the bolt in hammer handle root Toggle, prevention sledgehammer, which is slipped out of the hand, pounds downward surface glass curtain wall.

Dismantle counter-jib：Roofing hangs 1 steering balance arm balancing weight region, and last block 2T balancing weights are dismantled to ground Afterwards, tower crane is balanced into revolution of arm and hangs 1 direction to roofing, counter-jib center suspension centre hangs 1 centre-to-centre spacing as 9 meters apart from roofing, and this hangs load In the range of allow to hang and carry 9T, but need outside luffing in view of hoisting objects back lower place region, thus consider by raising hoist engine with Counter-jib decomposes dismounting.Lifting mechanism weight is 1210KG.

The corner that the lifting rope of four equal lengths is connected to raising hoist engine with shackle when dismantling raising hoist engine is hung On ear, the pico- stress of suspension hook, suspension hook will be lifted by crane upwards by a small margin after each two connections bearing pin impact before and after raising hoist engine, really Start to turn round lower hook to the left after recognizing safety, place ground transhipment.

Counter-jib weight is 2251.48KG, adds balance arm brace 300KG, it is 2500KG to add up to weight.By four days on suspension hook Bolt is hung on four hangers of counter-jib lifting rope respectively, clears up all moveable debris on counter-jib, and the bearing pin of dismounting is necessary Playbacked, including split pin.All instruments are cleaned to wheelhouse flat position, only stay a hand hammer and a pair of tongs to make With, but must hold and hold.

Roofing is hung into 1 suspension hook to lift by crane upwards, counter-jib is bent downwardly in low state before rear height, balance arm brace link position To people can pickaback position, four dismounting works up, by safety belt hang it is firm after, two people pickaback descend pull bar, and human hand support pulls up Bar, a people impact bearing pin, impact the proficiency back side on the other hand and cover bearing pin, pre- anti-dropout, and after bearing pin exits, the people of back stay two is by pull bar Placement is got off, and bearing pin playback, the lower people of pull bar two helps slowly to draw close upper connecting rod to tower cap and tightened with iron wire, same method Remove another pull bar.

Roofing is hung into 1 suspension hook and drops to counter-jib horizontality, two people stand on the inside of transition segment, after having hung safety belt Start to remove the split pin that counter-jib connects bearing pin, bearing pin is impacted from outside to inside, the human hand of inner side one is sealed bearing pin prevention bearing pin and taken off Fall, bearing pin should slightly exert oneself close to impact when exiting, and with bearing pin is held, forbid bearing pin to slip out of the hand.

After counter-jib departs from transition segment, ground draws the personnel of direction controlling rope to change drawstring angle at any time, controls counter-jib In direction in midair, colleague's roofing hangs 1 and turns round lower hook to the left, and counter-jib placement ground is transported through into work.

Dismantle driver's cabin：It is more convenient when hanging 1 dismounting driver's cabin using roofing, by roofing hang 1 four lifting ropes respectively with Driver's cabin Lifting Lug is attached, and lifting rope is played into stress, then releases the safety guarantor between driver's cabin and tower cap Steel wire rope is protected, the cable that driver's cabin is connected with counter-jib has packed up disk in driver's cabin when dismantling counter-jib, will be small-sized Instrument and unnecessary accessory are both placed in driver's cabin corner, but to place uniformly, and cab door is locked.Remove driver's cabin and platform Between connect bearing pin, be hung on iron wire on driver's cabin hanger.Lifting driver's cabin, roofing hang 1 inside luffing upwards, and driver's cabin is not The collision rift roofing that start to turn left can be carried out with revolution and hangs 1 time hook, driver's cabin is connected into bearing pin on ground is placed on driver's cabin Interior transhipment.

The dismounting of tower cap：It is more relatively easy to remove tower cap, but to consider that tower cap is connected high-strength bolt with transition segment and has rust Turbid scene, some possible nuts have been difficult to loosen, and fire welding device is thought about when consideration carries out gas cutting with oxygen, it may be considered that Put out a fire with the built-in a small amount of water of iron sheet barrel or yellow sand, consideration is pulled with oil skin corner on four columns of upper rotary to form One string bag, a small amount of water is started to exchange fire in the string bag, is started to exchange fire with fiery bucket, is started to exchange fire below with oilcloth above, double shielding, it is ensured that Safety.

With the 3T straps bolt that two length are 1 meter on the hangers of tower crown end, strap is connected with tower cap and carried out with 5T shackles, Start to loosen tower cap and transition segment connecting bolt after strap is tensed, connecting bolt is loosened using tower crane dismounting special electric spanner Lever impact is carried out, nut goes to twist and removed, not directly gone to remove connecting bolt, spiral shell completely with electric wrench after loosening with hand Cap easily comes off under effect of inertia in electric wrench sleeve and smashes following glass curtain wall.

Slewing tower, upper undersetting and slew gear dismounting：Slewing tower, upper undersetting and slew gear add up to 4.5T, can disposably it be dismantled in tower body disassembly direction, but hanging in view of roofing needs after 1 revolution 180 degree luffing to go out out to 16 meters Begin lower hook, hangs 1 lifting performance table data according to roofing, 18 meters allow to hang load 4.5T, it is contemplated that the wind load and peace of 260 meters of height Overall coefficient, determine upper and lower pivoting support carrying out decomposition dismounting, i.e., first dismantle upper bracket, gyration gear ring and undersetting, maximum weight Measure as 1261KG, be entirely capable of satisfaction and hang load requiring.

It is banded in the hoisting wirerope of four equal lengths in four connection otic placodes of upper rotary, tightens up steel wire rope to stress State, expires boarding in lower revolution in advance, and prevention personnel and bolt falling are pounded to cladding glass after passing through following protective platform. Two erectors will turn round connection and loosened with high-strength bolt and remove in centre of gyration double offset ring spanner, and two personnel are from the centre of gyration Upper rotary is out observed in 48 layers of building and whether there is potential safety hazard during lifting, will be risen slightly on suspension hook, is observed Whether upper bracket completely disengages gyration gear ring, confirms safe and punctual rear beginning revolution to the left and lower hook, appointed place are placed, Same mode removes gyration gear ring, levers up gyration gear ring with crowbar when hanging and carrying gyration gear ring and pads a flitch, by steel Cord is passed beneath from gear ring, and steel wire rope is worn outward from interior, and shackle is closed up, and two steel wire ropes place ground in diagonally forming.

Under dismounting during pivoting support, the bolt that revolution is connected with gear ring is bundled in respectively with four steel wire rope square forms In hole position, station is in stock upper rotary platform after the high-strength bolt that revolution is connected with standard knot is removed with double offset ring spanner below On, bearing pin impact method is identical with crane arm dismounting mode, starts the lower revolution branch of lifting upwards after bearing pin connection in corner is removed Seat, lifting by crane previous name dismounting work, observation revolution separates situation with standard knot junction in standard knot under revolution, after confirmation is errorless Lifting signal is provided, roofing hangs 1 driver and starts to lift by crane by a small margin according to signal, can to the left turn round and lower hook, put after confirming safety Put ground and be transported through work.

Outer sleeve frame is dismantled：Tower crane standard knot is first introduced into platform before dismounting outer sleeve frame and operating platform piecemeal is dismantled, During platform is dismantled, pay attention to nut and pad is smaller is easily separated from, promptly pulled after having hung safety belt in position of standing firm Hand, carry out nut with hand after platform nut is loosened and exit, the nut screw rod dismantled is put with bucket, is confirmed existing without coming off As occurring.

Four days lifting rope bolts are hung in the bearing pin hole position that outer sleeve frame corner is connected with lower pivoting support, by suspension hook slowly to Upper lifting, the perpendicularity of suspension hook and tower body is observed, prevention suspension hook off normal causes corner pulley stuck phenomenon to occur, when outer sleeve frame takes off From starting to turn round lower hook to the left after standard knot height, specified location is placed, is turned after stock is fallen with truck crane on ground Fortune.Outer sleeve frame weight is 3T, and roofing, which hangs 1 and met, to be hung load and require.

Oil hydraulic system, jacking stock, platform and guardrail are dismantled, needs first (to contain jacking hydraulic system before dismantling climbing frame Petrol station, oil cylinder), operating platform, introduce platform dismounting, hydraulic jack is received and the Heng Liang that climbs is introduced in standard behind extreme higher position Heng Liang is carried out protection with the horizontal web member of standard knot with steel wire rope and is connected by section in marking time, by outer after prevention Heng Liang disengaging jacking cylinders Power influences to slide.The respectively dismounting one of two oil pipes of oil cylinder, other end is tightened on the joint dismantled, protection oil pipe excuse Do not come to harm and be lost in hydraulic oil.The power line of petrol station is packed up disk and tightened on motor.The pin that oil cylinder is connected with Heng Liang Axle is hit remove after, lifting strap fasten at the middle and upper part for climbing oil cylinder, strap stress with flitch tap strap shackle, it is ensured that strap Contacted with oil cylinder closely.Hit except the connection bearing pin above oil cylinder, two disassembly stations are pushed outwardly on oil cylinder on the inside of standard knot Portion, in addition two people station oil cylinder is held on platform, roofing hangs 1 and slowly risen, and ground is placed after oil cylinder is hung out into stock.

Hoist cable is fastened in the middle part of two side bars for introducing platform when platform is introduced in dismounting, hoist cable stress to platform is micro- upwards Stick up, two bearing pins of hand hammer percussion connection, depart to platform with introducing beam, introduction platform is adjusted to ground and is transported through.

Passed through from inside to outside from two lower crosspieces among platform railing with a strap, another head is hung on suspension hook, is hung With pico- stress, the connecting bolt of hound 33 below platform is first dismantled, dismantle personnel station on the inside of standard knot during dismounting, suspension Safety belt, a feet station found horizontal web member, and a pin catches on standard knot diagonal web member, and body is leant out outside standard knot, by connecting bolt Dismounting.Bolt is placed with keg in dismounting, prevention pad, nut come off.

After platform is dismantled, four steel wire cables hang over four angles of stock and bound, and check that pulley is after steel wire rope stress No to have stuck phenomenon, the steel wire rope that stock is connected with standard knot removes, and packs up overlord and sells to be lived with iron wire band, is slowly lifted up Stock, turn round lower hook to the left after stock is highly above standard section and place ground transhipment work.

Standard knot is dismantled：Standard knot and base section totally 3 section are dismantled, coxopodite weight is 963KG, reinforcement section weight is 976KG* 2 sections, it is 2915KG to add up to weight, and overall hangs of consideration carries 3 sections, and roofing is hung into 1 four rope bolts extensions and strengthened after saving corner, taut wire Rope, after the high-strength bolt that 16 M39*8.8 are saved is removed with double offset ring spanner impact in foundation beam position, it is accurate that 3 feast-brand marks are lifted by crane upwards Section, and ground is placed, transition after being fallen with truck crane.

Undercarriage bea and cantilever steel girder dismounting：It is mainly safety belt hitch point ratio to dismantle undercarriage bea and foundation beam and cantilever steel girder It is more difficult, consider to place 4 20 meters of lengthening safety rope 48 layers of entablature position, safety belt is effectively connected with safety rope Connect, then weld 1.3 meters of high steel pipes in cantilever steel girder end, by one Φ 10mm steel wire rope of steel pipe upper end bolt and building It is attached, is shaken hands when being walked as personnel to stablize centre of body weight and play railing effect between thing.

Dismounting undercarriage bea second point is that the fire prevention measure for cutting off work of weld seam equally adds water using fire prevention oilcloth and started to exchange fire Basin apparatus is carried out, and special messenger's hand extinguisher during rectification is cut off, is ready to put out a fire at any time, oxygen-acetylene pipe sends special messenger by second Alkynes pipe is bent, and acetylene hose is carried out into bending, control tempering during pre- anti-backfire.

Undercarriage bea and foundation beam hang load and are not described in detail, main to introduce dismounting cantilever steel girder step：First by cantilever steel girder Two braces hang 1 with roofing and dismantled above, and then two lifting rope bolts are hung on the hangers of cantilever steel girder both ends, by steel wire The connection bearing pin of lower supporting rod and hold-down support is removed in the middle part of 47 layers of vertical cylinder after pico- stress of restricting, bearing pin is connected removing Before, being connected with a steel wire rope between brace and opposite Core Walls Structure wall, steel cord ends bolt hangs a 3T chain block, The outside impulsive force of hound 33 is controlled with chain block.After bearing pin is impacted, chain block is slowly loosened, to hound 33 In vertical state, the connection between steel wire rope and chain block is released.By U-shaped armful on the landing stage of scaffold finished is set up in advance 353 back shroud bolt loosenesses are bound round, topmost two (each one of both sides) will first be stayed in above, other bolts are dismantled, and are being dismantled Prevent cover plate during the bolt of the top to slide downwards, with flitch or channel-section steel by cover plate supported underneath, treat that bolt removes a back shroud When having certain interval between cylinder with a flitch pad between cover plate and cylinder, a human hand held cover plate is held, and another people tears open Last bolt is unloaded, cover plate lift is placed on the landing stage of scaffold a middle people by totally three people, and tying down the people of cover plate three with the rope made of hemp holds Place ground.After the completion of detachable cover plate, roofing hangs 1 pico- revolution to the left, U-shaped anchor ear 353 is accelerated back after departing from concrete column Turn lower hook to ground to transport.

Advantage of the invention is that：

1) the Tower crane disassembly structure mounting structure of high-rise installation of the invention is novel, overcome " people " font skyscraper from Tower crane can not be installed and the defects of roofing hangs structure at roof, select to pass through installation from the floor for needing build operation The mode of cantilever steel girder is installed fixed tower crane and roofing and hung, and after tower crane fulfils assignment, capable dismounting is lifted up into by roofing；

2) fixed form is simple, novel, and may be mounted at the outside of any floor, and Installation Flexibility is strong, particularly pair In the renovation for the building for having completed agent structure and the installation of external equipment, without installing tower crane and roofing from ground Hang, greatly save installation cost and running cost that tower crane and roofing are hung.

Disclosed above is only several specific embodiments of the present invention, but the present invention is not limited to this, any ability What the technical staff in domain can think change should all fall into protection scope of the present invention.

Claims (10)

1. a kind of detaching structure of the tower crane of high-rise installation, it is characterised in that the basic steel girder erection of the tower crane is in high level Between floor, roofing, which is hung, to be also mounted between high-rise floor, and the foundation structure that roofing is hung uses cantilever steel girder structure, described outstanding Choosing girder steel includes upper box beam, lower box beam, hound, H profile steel and fastener, core bit of the upper box beam from building Put to the edge of building and extend out to construction wall, the lower box beam is from the core position of building to the edge of building Extension, the upper box beam are fixed with lower box beam with the marginal position built with the marginal position built by fastener H profile steel, is connected with hound between the end points of the extension of the upper box beam and lower box beam and the edge of building, it is described on Box beam is both provided with two with lower box beam, and two upper box beams be arranged in parallel in the horizontal plane, described two upper boxes Beam be arranged in parallel with lower box beam in vertical direction, and is further fixed on one piece of reinforced slab, the roofing between two upper box beams Four supporting legs for hanging base are arranged on the extension of two upper box beams.

2. the detaching structure of the tower crane of high-rise installation according to claim 1, it is characterised in that the fastener includes The connected mode of U-shaped anchor ear, the first bolt fastening structure and the second bolt fastening structure, the upper box beam and building is the The connected mode of one bolt fastening structure and the second bolt fastening structure, the lower box beam and building is U-shaped anchor ear, described U-shaped anchor ear is fixed lower box beam with building by high-strength bolt and rear fender, and first bolt fastening structure passes through Top board is placed on above upper box beam, lower platen is placed on the lower section of building concrete agent structure, led to therebetween Cross high-strength bolt and penetrate concrete main body structure and top board and lower platen and fix upper box beam, wherein, in upper box beam The floor of enhancing enabling capabilities is provided with, footing plate is also clamped between the upper box beam and concrete main body structure, it is described Upper box beam extends building, and the angular position formed with building, is additionally provided with anti-back device, second bolt The top board of fixed structure is placed on the top of box beam, and lower platen is placed on below concrete main body structure, footing plate folder To hold between upper box beam and concrete main body structure, high-strength bolt penetrates top board and lower platen and fixes upper box beam, At the rear of upper box beam, reinforcement is provided with.

3. the detaching structure of the tower crane of high-rise installation according to claim 1, it is characterised in that the roofing hangs the branch of base Leg, it is connected on by carbon dioxide arc welding on top box type beam, and the place that roofing hangs base with upper box beam contacts is additionally provided with reinforcement Gusset, in order to preferably support whole roofing to hang, in the lower end of reinforced slab also by articulated manner, it is installed with inner support connection Beam, and the end set of the upper box beam to stretch out at two has horizontal connection beam.

A kind of 4. Tower crane disassembly method of high-rise installation, it is characterised in that be provided with the height described in claim 1-3 any one The detaching structure of the tower crane of layer installation, and tower crane and roofing are hung all between the floor of high-rise, its demounting procedure For:One of attachment device is first installed, falls section, with the stable tower crane of steel wire rope；Then part counterweight is removed again, is left two pieces of counterweights, Roofing is installed on crane arm to hang, the large arm of dismounting crane arm front end, then dismantles the front tension bar of crane arm, dismantle leading portion crane arm After unload one of counterweight, after dismounting after the crane arm of part, remove last block counterweight；Remove balance successively afterwards Arm, drivers' cab, transition segment, dismounting upper rotary, dismounting gyration gear ring, lower revolution, remove lifting platform and outer sleeve frame, remove residue Standard knot, finally remove basic girder steel and cantilever steel girder.

5. the Tower crane disassembly method of high-rise installation according to claim 4, it is characterised in that in installation attachment device, drop In tower step, roofing is first sling into weighing arm and turned on the outside of building, counter-jib is in an angle of 90 degrees with tower crane, prevented to building direction Only tower crane collides during by standard knot down handling, then starts to fall supreme one of the attachment position of standard knot, Section is dropped again after dismounting attachment device, dismantles and tower crane is dropped into last 3 standard knots after following one of attachment device, with steel wire rope general Tower body is attached with building, and connected mode is in 45 laterally around steel wire rope using two main device for carrying a tripot burrs on the inside of tower-body standard section Degree is pulled on building connection girder steel, the orderly release then removed according to tower crane.

6. the Tower crane disassembly method of high-rise installation according to claim 4, it is characterised in that in crane arm demounting procedure In, first hung with roofing and dismantle amplitude variation trolley and luffing assembly to ground, recycle amplitude variation trolley to hang roofing installed in tower crane On the lower boom of crane arm front end, roofing is hung into supporting leg with clamping plate and is clamped on lower boom, hanging on end " people " font in roofing intersects Oblique pull is on top boom backward with steel wire rope for point, and middle to hang luffing with chain block control roofing, main power system is by tower crane Rise mechanism steel wire rope to replace, the roofing hangs revolution apart from building edge, and roofing is sling into weighing arm when derrick runway girder is dismantled After the outside segment distance of luffing one, derrick runway girder is rotated by 90 ° to the right to angle and carries out decline work, lifting performance is hung according to roofing, Crane arm front section is carried out to cutting the crane arm of arm, then integral demounting hindfoot portion in the air.

7. the Tower crane disassembly method of high-rise installation according to claim 4, it is characterised in that in dismounting counter-jib step In, derrick runway girder left direction time is turn 90 degrees by dismounting after completing crane arm, and now counter-jib hangs 10 meters of scopes apart from roofing It is interior, counterweight installation region is layered on preprepared flitch, safety net is covered above and tightens, is risen with four length identicals The corner shackle of raising hoist engine is connected by lifting rope with suspension ring respectively, and roofing suspension hook is sling to lifting rope stress, then beaten Go out the bearing pin being connected with hoist engine, raising hoist engine is hung and starts integral demounting counter-jib after being loaded onto ground.

8. the Tower crane disassembly method of high-rise installation according to claim 4, it is characterised in that the dismounting step also including tower cap Suddenly, in tower cap unloading process, with two strap bolts on the hangers of tower crown end, start to loosen tower cap and mistake after strap is tensed Section connecting bolt is crossed, connecting bolt loosens carries out lever impact using tower crane dismounting special electric spanner, and nut uses hand after loosening Go twisting to remove, remove connecting bolt with electric wrench, nut easily comes off in electric wrench sleeve and pounded under effect of inertia Bad following glass curtain wall；Tower cap starts to dismantle transition segment and drivers' cab in the same way after removing, and drivers' cab dismounting is relatively simple It is single.

9. the Tower crane disassembly method of high-rise installation according to claim 7, it is characterised in that in slewing tower, up and down branch In the unloading process of seat and slew gear, four connection otic placodes of upper rotary are banded in the hoisting wirerope of four equal lengths On, steel wire rope is tightened up to stress, the full boarding in lower revolution, revolution connection is loosened with high-strength bolt and removed in advance, Gyration gear ring is removed again, hangs and gyration gear ring is levered up into one flitch of pad with crowbar when carrying gyration gear ring, by steel wire rope from gear ring Pass beneath, steel wire rope is worn outward from interior, and shackle is closed up, and two steel wire ropes place ground in diagonally forming, and dismantles lower revolution branch During seat, it is bundled in respectively in the spiro keyhole position that revolution is connected with gear ring with four steel wire rope square forms, below will revolution Station is on stock upper rotary platform after the high-strength bolt being connected with standard knot is removed with double offset ring spanner, bearing pin impact method and lifting Arm dismounting mode is identical, starts the lower pivoting support of lifting upwards after bearing pin connection in corner is removed, and lifts by crane previous name dismounting work and exists Turn round observation revolution in lower standard knot and situation is separated with standard knot junction, provide lifting signal after confirmation is errorless, roofing hangs department Machine starts to lift by crane by a small margin according to signal, can to the left be turned round after confirming safety and lower hook, placement ground are transported through work.

10. the Tower crane disassembly method of high-rise installation according to claim 4, it is characterised in that dismantled in cantilever steel girder Cheng Zhong, two braces above cantilever steel girder are first lifted up into capable dismounting with roofing, then two lifting rope bolts hang over cantilever steel girder On the hangers of both ends, the connection bearing pin of lower supporting rod and hold-down support will be removed in the middle part of vertical cylinder after steel wire rope stress, gone Before connection bearing pin, it will be connected with a steel wire rope between brace and opposite Core Walls Structure wall, steel cord ends bolt hangs one Chain block, control the outside impulsive force of hound, after bearing pin is impacted, slowly loosen chain block, extremely with chain block Hound in vertical state, releases the connection between steel wire rope and chain block, on the landing stage of scaffold finished is set up in advance By U-shaped anchor ear back shroud bolt looseness, cover plate is dismantled, after the completion of detachable cover plate, roofing hangs pico- revolution to the left, makes U-shaped anchor ear The lower hook of revolution to ground is accelerated to transport after departing from concrete column.