CN109704211B - TC6015 tower crane dismounting and mounting method - Google Patents

Abstract

The invention discloses a TC6015 tower crane dismounting and mounting method, which comprises the steps of vertically transporting 3 tons of roof cranes by a construction elevator, and manually horizontally transporting the 3 tons of roof cranes to a set position for manual mounting; installing 6 tons of roof cranes by adopting 3 tons of roof cranes, installing 25 tons of roof cranes by adopting 6 tons of roof cranes, and installing a TCR6030 tower crane by adopting 25 tons of roof cranes; after jacking, the TCR6030 tower crane is matched with a 25-ton roof crane together to disassemble the TC6015 tower crane deformed on site; reconfiguring a TC6015 tower crane to independently complete installation activities by adopting a TCR6030 tower crane; and disassembling all auxiliary disassembling and assembling equipment after the TC6015 tower crane is installed. According to the technical scheme, the TC6015 tower crane can be disassembled and assembled on the premise of ensuring safety.

Description

TC6015 tower crane dismounting and mounting method

Technical Field

The invention belongs to the technical field of building construction, and particularly relates to a TC6015 tower crane dismounting and mounting method.

Background

The TC6015 tower crane is a construction machine which is commonly used in road and bridge engineering, and when pier construction is carried out, if the TC6015 tower crane is inclined, the disassembly needs to be carried out, and after the disassembly, one TC6015 tower crane is installed again. As the on-site concrete is already constructed to the pier top solid concrete elevation, the TC6015 tower crane is difficult to disassemble and reinstall and has great potential safety hazards. Therefore, the development of the TC6015 tower crane dismounting and mounting method is of great significance.

Disclosure of Invention

The invention aims to provide a TC6015 tower crane dismounting and mounting method to solve the technical problem of TC6015 tower crane dismounting and mounting.

The invention is realized by the following steps:

a TC6015 tower crane dismounting and mounting method is characterized in that a construction elevator is adopted to vertically transport 3 tons of roof cranes, and the 3 tons of roof cranes are manually and horizontally transported to reach a set position for manual mounting. Adopt 3 tons roofing to hang and install 6 tons roofing and hang, adopt 6 tons roofing to hang and install 25 tons roofing and hang and install TCR6030 tower machine, adopt 25 tons roofing to hang. And after jacking, the TCR6030 tower crane is matched with a 25-ton roof crane together to disassemble the TC6015 tower crane deformed on site. And reconfiguring the TC6015 tower crane to independently complete installation activities by adopting a TCR6030 tower crane. And disassembling all auxiliary disassembling and assembling equipment after the TC6015 tower crane is installed.

The construction process comprises the following steps: tower crane reinforcement → manual installation of 3-ton roof crane → 3-ton roof crane pre-embedding completion of 25-ton embedded part → installation of 6-ton roof crane → 6-ton roof crane pre-embedding completion of TCR6030 tower crane embedded part → installation of 25-ton roof crane → dismantling of 6-ton roof crane by 25-ton roof crane → installation of TCR6030 tower crane → jacking of TCR6030 tower crane → dismantling of TC6015 tower crane → installation of TC6015 tower crane → self-descending of TCR6030 tower crane → dismantling of TCR6030 roof crane → dismantling of TCR6030 tower crane → dismantling of TC6015 tower crane → dismantling of TC roof crane → dismantling of TC6015 tower crane → 3-ton roof crane → roof crane and withdrawal of auxiliary tower crane.

According to the technical scheme, the TC6015 tower crane can be disassembled and assembled on the premise of ensuring safety.

Drawings

Fig. 1 is a schematic view of the tower top reinforcing structure of the present invention. In the figure, 1-channel steel is connected with a main chord of a balance arm, 2-channel steel, 3-twisted tower top, 4-inclined balance arm and 5-channel steel batten plate.

Detailed Description

The present invention is further illustrated by the following examples, which should not be construed as limiting the invention in any way.

Example 1: disassembly scheme for Yunnan 8# pier TC6015 tower crane

1. Reinforcing the tower crane;

surveying before reinforcement: through actual observation and mapping of technicians and field measurement personnel, the inclination state of the tower body is backward inclining. And analyzing that the bending moment in the direction of the balance arm is larger than that in the direction of the cargo boom. The tower crane tilts backwards by 50mm towards the direction of the balance arm. And a total station is adopted to accurately survey the posture of the existing tower crane in the tower body center crossing and vertical tower crane lifting plane. And analyzing and judging that the front sheet diagonal brace on the tower top also has tensile stress in the state, and welding and reinforcing the diagonal brace on the tower top in the direction of the crane boom.

The treatment principle is as follows: the existing tower top is strictly forbidden to apply any external force (such as beating, prying the main chord member and the web member, and forbidding to adopt a crowbar and a sledge hammer). Application of an external force causes a disturbance of the existing equilibrium state. The occurrence of secondary disasters is avoided, and secondary accidents are avoided.

The treatment method comprises the following steps:

1.1, tools such as one 3.2-ton unilateral guide pulley, one hemp rope with the diameter of 100 meters and 20mm, a steel wire rope with the length of 2 meters and the diameter of 18mm, 1-ton shackle and the like are arranged. And fixing the 3.2 ton unilateral guide pulley on one corner of the main chord of the sleeve frame by using a steel wire rope shackle (well performing steel wire rope protection work). The hemp rope passes through two rope ends of the guide pulley to be knotted. The electric welding machine, the oxygen acetylene and the reinforcing material are manually dragged to the jacket frame platform through the fixed pulley rope. The oxygen acetylene is separated by more than 5m (a rest platform is placed in one bottle, a sleeve frame platform is placed in the other bottle) according to the standard requirement, and the distance between the ignition point and the oxygen acetylene bottle is more than 10 m. Fire prevention measures such as a fire keeper, a fire receiving basin fire extinguisher and the like are arranged.

And 1.2, actually measuring the length of the reinforcing material on site by adopting a meter ruler, and cutting the initial length on the bracket operation plane. And dragging the steel wire rope to the sleeve frame platform by using a hemp rope. And then the steel wire is pulled to the reinforcing position at the tower top by a 10-meter hand rope for welding treatment.

1.3, the reinforcing rod piece and the original tower top form a new lattice component. The tower crane is ensured to be safer in the state.

2. Manually installing a 3-ton roof crane;

2.1 carrying out adhesion and reinforcement treatment on the elevator.

2.2 heightening the height of the elevator.

And 2.3, erecting a transportation operation platform of the concrete solid surface of the pier and treating pier top reinforcing steel bars. Firstly, 3 tons of materials such as a roof crane winding drum, a winding drum bracket, an inclined stay bar, a hydraulic pump station, a steel wire rope and the like are transported to a solid surface layer.

And 2.4 immediately dismantling the solid surface layer transportation platform and the channel after the solid surface layer material is transported. And (5) recovering the transportation platform with the bracket elevation to pass.

And 2.53 t of treating the foundation of the roof crane. 3 pieces of on-site 40a I-steel are adopted and combined together to create a 3-ton roof crane vertical force plane, and 3 pieces of side-by-side I-steel are welded on a bracket and firmly welded with welding feet with the size of 8 mm. And then, the height compensation is carried out by adopting 40a I-steel. And an oblique support is additionally arranged. And determining the rotation center position of the 3-ton roof crane and the position of another inclined strut embedded part by the center of one inclined strut of the steel structure foundation support. The supporting legs of the 3-ton roof crane are stressed in a square of 4 meters and 4 meters (3 corners are stressed). And after the steel column foundation at the position of the rotation center is determined, welding and reinforcing the inclined support rod. And the other inclined strut marks the determined embedded center position by using a marker pen or paint, and processes the concrete (containing C35) poured by the embedded part embedded by the steel bar, wherein the concrete is not less than C35.

2.6 setting up a double-row scaffold of a reverse type. The installation is used when the gyration stand. The rotary upright post is immediately dismantled after being installed.

After the 2.73 ton roof crane foundation is positioned, an operation platform between the brackets is erected. The operating platform has the requirement of bearing a 1-ton crane arm. And play the effect of depositing 3 tons of tower machine parts, instruments and having a temporary rest.

2.8 the small movable pulley block is adopted to install the rotary upright post and the inclined stay bar thereof at 4 multiplying power. When the rotary support is installed, the rope entering direction of the winch is noticed. And simple reinforcement welding is carried out immediately after the rope entering direction of the rotary support is determined.

2.9 placing the rotary support drum. The center of the winding drum is connected with the rope inlet pulley in a plane. And the winch is arranged on the embedded part. After a reinforcing steel bar with the diameter of 32 penetrates through the interior of the embedded part and is firmly welded and fixed with the main bridge pier reinforcing steel bar, the winch embedded part is poured. (the concrete strength is not less than C35).

2.10 installing a crane arm. The crane boom is provided with 4 sections of crane booms by adopting a 3-ton chain block. And 4 steel wire rope chain blocks on the TC6015 tower body are used for splicing the rest 5 sections of the crane arms and then suspending the spliced crane arms on the standard sections. After the upper chord pin shaft of the crane boom is connected, the crane boom is lifted by a chain block of the tower body to butt-joint the crane boom into 16 meters.

2.11 installing a luffing rope. And an oil circuit is connected, the wire rope of the variable-amplitude winch is replaced and released, the variable-amplitude rope is wound by 4 times, and the fishplate pin shaft is firmly constrained.

2.12 installing a lifting steel wire rope. And connecting a leading rope which is put in advance with a main hoisting steel wire rope by using a steel wire rope connecting rope sleeve to slowly operate a main hoisting machine until the main steel wire rope passes through a arm tip hoisting pulley block and is connected with a hoisting hook.

2.13 debug self test.

3. Pre-burying a 25-ton roof crane foundation;

after the 3.13 ton roof crane is debugged, 25 ton roof crane supporting legs are arranged on the surface of the pier. Concrete foundation bars of 3.5 m x 0.9 m were hoisted to the pier top surface at the same time.

3.2, placing the embedded support legs for leveling, binding reinforcing steel bars to fix the erection bars, and pouring concrete.

Mounting a 46-ton roof crane;

the 6-ton roof crane is installed by adopting a 3-ton roof crane as hoisting equipment;

the 3 tons of roof cranes have 4-17 meters and are hoisted for 3 tons in the whole process.

And 4.16 t of roof crane foundation treatment. And hoisting the material of the base steel beam of the 6 tons roof crane to the steel beam on the bracket plane by adopting the 3 tons roof crane. And (5) carrying out reinforcement welding treatment on the 6-ton roof crane foundation.

4.2 installation cross chassis, weld stirrup and girder steel, the stirrup adopts high strength bolt to be connected with cross chassis.

4.3 install 3 standard knots.

4.4 the crane boom assembled on the ground is lifted by using a 3-ton roof crane. The crane boom is fixed on the TC6015 tower body by a tower body steel wire rope.

4.5 install 6 tons of roof and hang slewing bearing.

4.6 installing 6 tons of roof crane balance arms.

4.7 a lifting winch and a variable-amplitude winch are installed.

4.8 install A frame assembly.

4.93 ton roofing hangs and cooperates under the wire rope combined action of tower body firmly with the restraint of arm root pin joint point.

4.10 winding amplitude-variable steel wire rope and its lifting steel wire rope.

4.11 install the balanced weight, 6 tons roofing hangs debugging acceptance.

5, pre-embedding a TCR6030 tower crane foundation;

after the 5.16-ton roof crane is debugged, the 25-ton roof crane embedded sections are placed on the surfaces of the piers. Concrete foundation bars of 3.5 m x 1 m were hoisted simultaneously to the pier top surface.

5.2, placing the embedded support legs, leveling, binding reinforcing steel bars, fixing the erection bars, and pouring concrete.

625 tons of roof hangers are installed.

And 6 tons of installed roof cranes are used as hoisting equipment to install 25 tons of roof cranes.

6.1 installing 1 section of 3 m transition section and 2 sections of 3 m standard section.

6.2 installing a slewing bearing.

6.3 installing a balance arm frame.

And 6.4, installing a main hoisting mechanism assembly and a luffing mechanism assembly thereof.

6.5 installing the A frame assembly.

6.6 assembling the crane arm assembly by adopting a 70-ton truck crane on the ground. 6 tons are adopted to be hoisted to the top surface of the pier, and a 30-meter crane arm of a 25-ton roof is installed under the combined action of a steel wire rope of the tower body.

6.7 installing the balance weight.

And debugging and acceptance of 6.825 ton roof cranes.

Dismounting the 76-ton roof crane;

and (4) disassembling the 6-ton roof crane by using the mounted 25-ton roof crane as hoisting equipment.

7.1 the balance weight of the 6-ton roof crane is removed by adopting the installed 25-ton roof crane.

7.2 dismantle the jib assembly of 6 tons of roofing cranes.

7.3 dismantle A shelf assembly.

7.4 disassembling a hoisting winch assembly and a variable-amplitude winch assembly.

7.5 disassembling the balance arm.

7.6 disassembling the slewing bearing assembly.

7.7 the standard section of the tower body and the cross underframe thereof are disassembled.

8, mounting a TCR6030 tower crane;

and (3) installing the TCR6030 tower crane by using the installed 25-ton roof crane as hoisting equipment.

And 8.1, 4 standard knots are installed.

And 8.2, installing a sleeve frame assembly.

And 8.3, installing a rotary support assembly.

And 8.4, mounting a balance arm structural member.

And 8.5, a hoisting mechanism assembly and a luffing mechanism assembly are installed.

And 8.6, installing the A frame assembly.

8.7 install 30 meters crane arm.

8.8 winding amplitude-variable steel wire rope and main hoisting steel wire rope.

And 8.9 installing a balance weight.

8.10 jacking to 8 standard sections after debugging and acceptance.

9, disassembling the TC6015 tower crane;

the mechanical equipment used for disassembling the TC6015 is TCR6030 and a 25-ton roof crane.

9.1 the TCR6030 tower crane is used for hoisting the operation frame and the anti-falling device is arranged on the lifting hook. Personnel in the construction cage must hang the safety belt from the fall arrester. And lifting the winch to the vicinity of a 25.36-meter lifting point of a TC6015 crane arm. Two steel wire ropes with the diameter of 28mm are hung on the two sides of about 25.36 meters. One hanging point is 21 meters and one hanging point is 29 meters. Four 4 steel wire ropes with the diameter of 28mm adopt two chain blocks with the weight of 5 tons to adjust the stress state of the steel wire ropes. So that the steel wire rope is just in an unstressed state.

9.2 placing the suspension cage and the person on the surface of the pier. The number of preventers is 2.

9.3 hoisting the winch. The winch adopts two long and two short steel wire ropes. And the stress states of the hoisting point and the steel wire rope are adjusted by matching with a 3.2-ton chain block. Removing the fixed winch bolt, and slowly detaching the winch to the pier plane

9.4 removing the first counterweight. And re-tying the steel wire rope with the diameter of 28mm by 6 meters and the short steel wire rope by 2 meters. And 5 tons of chain blocks are hung on a 2m steel wire rope. And simultaneously, all the balance weights are independently and firmly fixed on the balance arm by adopting a steel wire rope. And cutting off the cross beam at the counterweight end part of the balance arm by adopting gas cutting equipment. The first counterweight transversely adopts a 3.2-ton chain block and a steel wire rope to draw and guide the direction to the direction of the rotation center. The first counterweight is difficult to move in the tower dismantling process. The lifting hook of the TCR6030 tower crane is stopped at a position 5 meters above the balance weight, and the balance weight is lifted upwards by mainly adopting a chain block of 5 tons. The cooperation of 5 tons of chain block and 3.2 tons of chain block will balance the weight and take out (alternative, if 5 tons of chain block can't take out the balance weight, then adopt the mode of transferring downwards to remove the balance weight restraint, adopt gas cutting equipment to open 50 cm's opening with the web member with the level of balance arm afterbody and take away the balance weight). Special attention is paid to: data of monitoring the inclination of the tower body by the total station are required to be set on the ground in the link. And carrying out ground monitoring in the whole tower dismantling process, and communicating data with general commanders of the tower dismantling through an interphone in real time. The tower crane keeps a backward tilting state of 0-50mm in the whole process of tower dismantling. The control method adopts a 25-ton roof crane to control the lifting force to realize the balance of the posture of the tower crane.

9.5 the successive balancing weights are removed in the same way. The total station monitors the posture of the tower body and ensures that the tower body keeps inclining backwards by 0-50 mm.

9.6 removal of the balance arm. 4 steel wire ropes with the diameter of 22 are 8 meters for the balance arm dismantling, and 2 two hand chain blocks with the weight of 3.2 tons are hung in the direction of the root part of the balance arm to adjust the stress condition of the steel wire ropes for hoisting the balance arm. The sliding rope connected with the rotary tower body is tied. (rope slipping function, preventing the balance arm from hanging at a point or before or after the balance arm, and ensuring the safety and controllability of the operation activity in the whole hoisting process). The 10m hand rope is tied to facilitate ground guidance of ground personnel and placement of the balance arm. And (3) removing the balance arm pin shaft, and cutting off the connecting plate between the rotary tower body and the balance arm by gas cutting when the balance arm pin shaft cannot be smoothly removed in the removing process. (gas cutting process of setting special person for fire-receiving measure and fire-fighting measure)

9.7 dismantling the tower top pull rod. The tower top pull rod adopts TCR6030 to tie short and long wire ropes and a suspension cage for a crane. The worker must hang the safety hook. The fall arrester is arranged on the TCR6030 hook. A3.2 ton chain block is adopted to connect the separated pull rod with the tower top. After the lug plates of the pull rods are cut off, the long pull rods and the short pull rods are placed on the upper chord of the crane boom and effectively tied up by using No. 8 iron wires.

9.8 removal of the top of the tower. And the stress state of the steel wire rope is adjusted by adopting TCR6030 through long and short steel wire ropes and 3.2 tons of chain blocks, and the gas cutting is carried out on the tower top.

9.9 removal of boom pull rod a 10m long pull rod which is easy to slip off is removed by a TCR6030 tower crane.

9.10 boom removal. And the crane boom is still firmly tied with the rotary tower body by adopting a steel wire rope with the diameter of 12mm when the crane boom is dismantled. And releasing the constraint of the crane boom root. When the constraint can not be relieved by adopting a machine, the constraint is cut off by adopting gas cutting. And slowly loosening the binding steel wire rope. And (4) readjusting the posture of the crane boom (finely adjusting to realize automatic balance under the self-gravity state). A10-meter hand rope is arranged in advance at the root arm tip position of the crane arm. Convenient to dismantle and then place the ground personnel in a guiding way.

9.11 the rotary tower body is dismantled. Four equal-length steel wire ropes are adopted to tie 4 angular points. And 4 pin shaft constraints with the rotary tower body are removed. Tying a 10-meter hand rope. Placing on the ground.

9.12 removing the swivel assembly. Before dismantling, the slewing bearing is separated from the sleeve frame. 4 steel wire ropes with the same length and the diameter of 22mm are adopted for disassembly. And releasing the restriction of the rotary support assembly and the standard joint connecting pin shaft. Removed to the surface using TCR 6030.

9.13 removing the sleeve frame assembly. A10-meter hand rope is tied by a steel wire rope which is the same as the hoisting and rotating assembly. The jacket frame is slowly lifted out of the standard section. And (5) hoisting to the ground.

10, installation of new equipment TC 6015;

10.1 the standard knot on site is lowered for more safety in installation and the height of two standard knots is disassembled in advance.

10.2 ground operators used 70 ton truck-cranes to assemble parts on the ground such as small pieces.

And 10.3, installing a sleeve frame assembly.

10.4 mounting the slewing bearing assembly to contain the cab.

And 10.5, installing a rotary tower body and a tower top assembly.

10.6 mounting the balance arm assembly.

10.7 install a 2 ton counterweight.

10.8 install 60 meters boom assembly. (the dolly is locked to the arm root position).

10.9 installing the remaining balancing weight.

10.10 according to the specification, the main hoisting steel wire rope is threaded and wound.

And 10.11 debugging and accepting, and carrying out a load test.

11 TCR6030 descending and disassembling;

and (3) disassembling the TCR6030 tower crane by taking the mounted 25-ton roof crane as hoisting equipment.

11.1 the TCR6030 tower crane is automatically lowered to 4 standard sections (including embedded sections) of the initial installation height strictly according to the specification requirements.

11.2 the 25-ton roof crane is adopted as the main hoisting and dismantling equipment. And adopting the installed TC6015 equipment as an auxiliary tower dismantling tool.

11.3 use 25 tons roofing crane to remove TC6030 balance weight according to the specification.

11.2 disassembling the lifting hook to recover the lifting steel wire rope.

11.3 disassembling the crane arm. And recovering the amplitude-variable steel wire rope.

11.4 disassembling the A-shaped frame.

11.5 disassembling the balance arm assembly.

11.6 disassembling the rotary support.

11.7 disassembling the sleeve frame assembly.

11.8 disassembling the remaining standard sections.

12. Disassembling a 25-ton roof crane;

and (4) taking the installed TC6015 as hoisting equipment to perform disassembling operation.

12.1 adopt TC6015 to dismantle 25 tons of roof crane counterweights.

12.2 dismantle 25 tons roofing hoist arm.

12.3 dismantle 25 tons of roofing and hang A shelves assembly.

12.4 disassembling 25-ton roof crane winch assembly and variable amplitude winch assembly.

12.5 disassembling the balance arm assembly.

12.6 disassembling the slewing bearing assembly.

12.7 disassembling the remaining standard sections.

13.3 t of roof crane disassembly;

and (4) taking the installed TC6015 as hoisting equipment to perform disassembling operation.

13.1 disassembling 3 tons of roof hoisting hooks, and recycling the main hoisting steel wire rope to the winding drum.

13.2 hoisting the crane arm by adopting TC6015 magnification.

13.3 disassembling the hoisting and winding mechanism.

13.4 disassembling the power pump station system.

13.5 two inclined supporting rods of the 3-ton roof crane are respectively disassembled.

13.6 disassembling 3 ton roof hanging upright post and rotary assembly.

The above are only specific application examples of the present invention, and other embodiments of the present invention are within the scope of the present invention as claimed by using equivalent alternatives or equivalent variations.

Claims (1)

1. A TC6015 tower crane dismounting and mounting method is characterized by comprising the following steps: vertically transporting 3 tons of roof cranes by using a construction elevator, and manually horizontally transporting the 3 tons of roof cranes to a set position for manual installation; installing 6 tons of roof cranes by adopting 3 tons of roof cranes, installing 25 tons of roof cranes by adopting 6 tons of roof cranes, and installing a TCR6030 tower crane by adopting 25 tons of roof cranes; after jacking, the TCR6030 tower crane is matched with a 25-ton roof crane together to disassemble the TC6015 tower crane deformed on site; reconfiguring a TC6015 tower crane, and independently completing installation activities by adopting a TCR6030 tower crane; disassembling all auxiliary disassembling and assembling equipment after the reconfigured TC6015 tower crane is assembled; the construction process comprises the following steps: tower crane reinforcement → manual installation of 3-ton roofing crane → 3-ton roofing crane pre-embedding of 25-ton embedded parts → installation of 6-ton roofing crane → 6-ton roofing crane pre-embedding of TCR6030 tower crane embedded parts → installation of 25-ton roofing crane → dismantling of 6-ton roofing crane by 25-ton roofing crane → installation of TCR6030 tower crane → jacking of TCR6030 tower crane → dismantling of TC6015 tower crane → TCR 605 tower crane installation of reconfigured TC6015 tower crane → TCR6030 self-descending → TCR6030 roof dismantling TCR6030 → dismantling of reconfigured TC6015 tower crane 25-ton roofing crane dismantling of 25-ton tower crane → dismantling of 3-ton roofing crane → roofing crane and auxiliary tower crane withdrawal.

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