CN104386598A - Dismantling method for tower crane jib - Google Patents
Dismantling method for tower crane jib Download PDFInfo
- Publication number
- CN104386598A CN104386598A CN201410470790.XA CN201410470790A CN104386598A CN 104386598 A CN104386598 A CN 104386598A CN 201410470790 A CN201410470790 A CN 201410470790A CN 104386598 A CN104386598 A CN 104386598A
- Authority
- CN
- China
- Prior art keywords
- crane
- arm
- jib
- ship
- compound type
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 15
- 150000001875 compounds Chemical class 0.000 claims description 31
- 239000000725 suspension Substances 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 abstract description 9
- 238000009434 installation Methods 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract 1
- 230000011218 segmentation Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
- B66C23/64—Jibs
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Jib Cranes (AREA)
Abstract
The invention relates to the field of machinery equipment installation and disassembly methods, in particular to a dismantling method for a tower crane jib. The method comprises the steps of: dismantling part of the platform at the downstream side of a main pier in advance and shortening the hanging distance; dismantling clump weights and a lifting hook, conducting first release to dismantle 4-6 sections of the jib, utilizing a combined crane ship to lay the jib flat slowly and then loosening the hook to let an inner pull rod bear all the jib weight; then dismantling outer pull rods one by one; performing tensioning with a chain block between a 3rd section of jib and a 4th section of jib, tying two hawser cables to two ends of jib 4-6, performing control respectively from the ship and a trestle, dismantling a connecting pin between the 3rd section of jib and a 4th section of jib, carrying out dismantling from bottom to top in order, and dismantling two pins at the jib root to let the jib break away from a slewing bearing, and then slowly lowering the jib to the platform. The method provided by the invention loosens the jib pull rods twice, disintegrate the jib in the air and realizes dismantling in sections, also has low requirement for the construction environment, has no need for large scale equipment, and saves the construction cost.
Description
Technical field
The present invention relates to mechanized equipment installation and removal method field, be specifically related to the method for dismounting of derrick runway girder.
Background technology
After derrick runway girder is removed and normally unclasped by crane arm pull bar, after the connection of the inside and outside pull bar of disposable releasing and crane arm, crane arm is removed by entirety.But the restriction often due to field condition or weight-lifting equipment in actual demolishing process, and have to crane arm pull bar to carry out unclasping for twice, aloft disintegrate crane arm, and segmentation is removed.And the connection of the inside and outside pull bar of disposable releasing and crane arm, need adopt main equipment, condition is harsh, and construction cost is too high.
In order to solve the problem, the invention provides one and carried out unclasping for twice by crane arm pull bar, aloft disintegrate crane arm, and segmentation is removed, and require low to construction environment, without the need to main equipment, saves the method for dismounting of the derrick runway girder of construction cost.
The method for dismounting of derrick runway girder of the present invention, comprises the following steps:
The first step, removes and prepares, and is removed by the Partial flats in main pier downstream in advance, shortens and hangs distance; Tower machine is fallen voluntarily joint to minimum altitude, retain 3 standard knots; Crawler crane installs brachium, and fixing near stem crawler crane being moved to covered barge; Ballast is carried out at cabin afterbody concrete block; Compound type crane ship concrete block carries out examination and hangs, and checks whether crawler crane lifting performance and stability of ship meet the demands;
Second step, remove clump weight, clump weight amounts to 5 pieces, 4 pieces large 1 piece little, removes needs and hangs height about 45m, selects high tide level to be hung out by clump weight block-by-block with compound type crane ship;
3rd step, removes suspension hook, is transferred to by suspension hook on platform, is then removed by the fixed end of master winch steel rope, opens main winch, is recovered to by wirerope-winding on reel; Amplitude variation trolley is moved on to crane arm root, and be temporarily fixed on crane arm; Variable-amplitude steel wire rope is removed rear winding from amplitude variation trolley to be recovered on the reel of luffing winch;
4th step, first time unclasps dismounting 4 ~ 6 and saves crane arm, selects tidal level to carry out operation more than during lm; Be wound up into by hoist rope in the assembly pulley of back stay, in order to unclasp pull bar, lifted by crane by arm end by crane arm with compound type crane ship, suitable tensioning hoist rope, removes the pin of arm-tie, slowly unclasps hoist rope, lax back stay; After outside link is completely lax, removes the pin at another place, then reclaim hoist rope, back stay is stretching, the pin that first time removes is installed again, makes back stay stressed; Crane arm is slowly set level rear loose hook by compound type crane ship, allows draw-in bar bear the weight of whole crane arm; Then outside link is removed one by one; Suspension centre is selected the point midway at Section 5 arm, compound type crane ship slowly hoists, play lift to 10 about t to stop hoisting, tighten up with chain block between 3,4 joint arms, two cable wind ropes are fastened at arm 4 ~ 6 two ends, control from ship and trestle respectively, to collide with the crane arm of crawler crane after free removal; Remove the connecting pin between the 3rd, 4 joint arms, remove according to order from bottom to top, after dismounting, slowly unclasp cucurbit, release impulsive force; The cucurbit of removing between 3,4 joints connects, and transfers on platform by arm joint 4 ~ 6;
5th step, removes Section 3 crane arm, removes pull bar, remove Section 3 arm with compound type crane ship with compound type crane ship, lifts by crane amplitude variation trolley and is pulled out crane arm, transfer on platform with compound type crane ship
6th step, second time is loosened dismounting 1 ~ 2 and is saved crane arm, location of being cast anchor by compound type crane ship; Compound type crane ship, by 1 ~ 2 joint boom hoist, makes it rotate up about 5 °, lax draw-in bar, and suitable tensioning hoist rope, again removes the pin reinstalled, slowly unclasp hoist rope, lax back stay; Allow tower cap lean forward, with lower link bar tower cap fixed and keep the attitude that leans forward; Remove two pins of the inside and outside pull bar of crane arm end, slowly crane arm is set level, allow pull bar throw off from end; Remove two pins at arm root place, allow crane arm depart from pivoting support, then slowly transfer to platform.
Crane arm pull bar carries out unclasping for twice by the present invention, and aloft disintegrate crane arm, and segmentation is removed, and requires low to construction environment, without the need to main equipment, saves construction cost.
Detailed description of the invention
The method for dismounting of derrick runway girder, comprises the following steps:
The first step, removes and prepares, and is removed by the Partial flats in main pier downstream in advance, shortens and hangs distance; Tower machine is fallen voluntarily joint to minimum altitude, retain 3 standard knots; Crawler crane installs brachium, and fixing near stem crawler crane being moved to covered barge; Ballast is carried out at cabin afterbody concrete block; Compound type crane ship concrete block carries out examination and hangs, and checks whether crawler crane lifting performance and stability of ship meet the demands;
Second step, remove clump weight, clump weight amounts to 5 pieces, 4 pieces large 1 piece little, removes needs and hangs height about 45m, selects high tide level to be hung out by clump weight block-by-block with compound type crane ship;
3rd step, removes suspension hook, is transferred to by suspension hook on platform, is then removed by the fixed end of master winch steel rope, opens main winch, is recovered to by wirerope-winding on reel; Amplitude variation trolley is moved on to crane arm root, and be temporarily fixed on crane arm; Variable-amplitude steel wire rope is removed rear winding from amplitude variation trolley to be recovered on the reel of luffing winch;
It is characterized in that the method for dismounting of derrick runway girder also comprises the 4th step, first time unclasps dismounting 4 ~ 6 and saves crane arm, selects tidal level to carry out operation more than during lm; Be wound up into by hoist rope in the assembly pulley of back stay, in order to unclasp pull bar, lifted by crane by arm end by crane arm with compound type crane ship, suitable tensioning hoist rope, removes the pin of arm-tie, slowly unclasps hoist rope, lax back stay; After outside link is completely lax, removes the pin at another place, then reclaim hoist rope, back stay is stretching, the pin that first time removes is installed again, makes back stay stressed; Crane arm is slowly set level rear loose hook by compound type crane ship, allows draw-in bar bear the weight of whole crane arm; Then outside link is removed one by one; Suspension centre is selected the point midway at Section 5 arm, compound type crane ship slowly hoists, play lift to 10 about t to stop hoisting, tighten up with chain block between 3,4 joint arms, two cable wind ropes are fastened at arm 4 ~ 6 two ends, control from ship and trestle respectively, to collide with the crane arm of crawler crane after free removal; Remove the connecting pin between the 3rd, 4 joint arms, remove according to order from bottom to top, after dismounting, slowly unclasp cucurbit, release impulsive force; The cucurbit of removing between 3,4 joints connects, and transfers on platform by arm joint 4 ~ 6;
5th step, removes Section 3 crane arm, removes pull bar, remove Section 3 arm with compound type crane ship with compound type crane ship, lifts by crane amplitude variation trolley and is pulled out crane arm, transfer on platform with compound type crane ship;
6th step, second time is loosened dismounting 1 ~ 2 and is saved crane arm, location of being cast anchor by compound type crane ship; Compound type crane ship, by 1 ~ 2 joint boom hoist, makes it rotate up about 5 °, lax draw-in bar, and suitable tensioning hoist rope, again removes the pin reinstalled, slowly unclasp hoist rope, lax back stay; Allow tower cap lean forward, with lower link bar tower cap fixed and keep the attitude that leans forward; Remove two pins of the inside and outside pull bar of crane arm end, slowly crane arm is set level, allow pull bar throw off from end; Remove two pins at arm root place, allow crane arm depart from pivoting support, then slowly transfer to platform.
Last crane arm is all transferred on trestle and platform after removing and is stacked temporarily, undertaken disintegrating by floor times such as compound type crane ship utilizations, entrucking, shipped off-site, so far, the dismounting work of crane arm all completes, and the remainder of tower machine removed by the box-like crane ship of available set.
Crane arm pull bar carries out unclasping for twice by the present invention, and aloft disintegrate crane arm, and segmentation is removed, and requires low to construction environment, without the need to main equipment, saves construction cost.
Claims (1)
1. the method for dismounting of derrick runway girder, comprises the following steps:
The first step, removes and prepares, and is removed by the Partial flats in main pier downstream in advance, shortens and hangs distance; Tower machine is fallen voluntarily joint to minimum altitude, retain 3 standard knots; Crawler crane installs brachium, and fixing near stem crawler crane being moved to covered barge; Ballast is carried out at cabin afterbody concrete block; Compound type crane ship concrete block carries out examination and hangs, and checks whether crawler crane lifting performance and stability of ship meet the demands;
Second step, remove clump weight, clump weight amounts to 5 pieces, 4 pieces large 1 piece little, removes needs and hangs height about 45m, selects high tide level to be hung out by clump weight block-by-block with compound type crane ship;
3rd step, removes suspension hook, is transferred to by suspension hook on platform, is then removed by the fixed end of master winch steel rope, opens main winch, is recovered to by wirerope-winding on reel; Amplitude variation trolley is moved on to crane arm root, and be temporarily fixed on crane arm; Variable-amplitude steel wire rope is removed rear winding from amplitude variation trolley to be recovered on the reel of luffing winch;
It is characterized in that the method for dismounting of derrick runway girder also comprises the 4th step, first time unclasps dismounting 4 ~ 6 and saves crane arm, selects tidal level to carry out operation more than during lm; Be wound up into by hoist rope in the assembly pulley of back stay, in order to unclasp pull bar, lifted by crane by arm end by crane arm with compound type crane ship, suitable tensioning hoist rope, removes the pin of arm-tie, slowly unclasps hoist rope, lax back stay; After outside link is completely lax, removes the pin at another place, then reclaim hoist rope, back stay is stretching, the pin that first time removes is installed again, makes back stay stressed; Crane arm is slowly set level rear loose hook by compound type crane ship, allows draw-in bar bear the weight of whole crane arm; Then outside link is removed one by one; Suspension centre is selected the point midway at Section 5 arm, compound type crane ship slowly hoists, play lift to 10 about t to stop hoisting, tighten up with chain block between 3,4 joint arms, two cable wind ropes are fastened at arm 4 ~ 6 two ends, control from ship and trestle respectively, to collide with the crane arm of crawler crane after free removal; Remove the connecting pin between the 3rd, 4 joint arms, remove according to order from bottom to top, after dismounting, slowly unclasp cucurbit, release impulsive force; The cucurbit of removing between 3,4 joints connects, and transfers on platform by arm joint 4 ~ 6;
5th step, removes Section 3 crane arm, removes pull bar, remove Section 3 arm with compound type crane ship with compound type crane ship, lifts by crane amplitude variation trolley and pulled out with compound type crane ship
Crane arm, transfers on platform;
6th step, second time is loosened dismounting 1 ~ 2 and is saved crane arm, location of being cast anchor by compound type crane ship; Compound type crane ship, by 1 ~ 2 joint boom hoist, makes it rotate up about 5 °, lax draw-in bar, and suitable tensioning hoist rope, again removes the pin reinstalled, slowly unclasp hoist rope, lax back stay; Allow tower cap lean forward, with lower link bar tower cap fixed and keep the attitude that leans forward; Remove two pins of the inside and outside pull bar of crane arm end, slowly crane arm is set level, allow pull bar throw off from end; Remove two pins at arm root place, allow crane arm depart from pivoting support, then slowly transfer to platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410470790.XA CN104386598A (en) | 2014-09-16 | 2014-09-16 | Dismantling method for tower crane jib |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410470790.XA CN104386598A (en) | 2014-09-16 | 2014-09-16 | Dismantling method for tower crane jib |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104386598A true CN104386598A (en) | 2015-03-04 |
Family
ID=52604582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410470790.XA Pending CN104386598A (en) | 2014-09-16 | 2014-09-16 | Dismantling method for tower crane jib |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104386598A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104692261A (en) * | 2015-03-24 | 2015-06-10 | 启东建筑集团有限公司 | Symmetrical dismounting construction method for attachment device of tower crane |
| CN105712218A (en) * | 2016-03-31 | 2016-06-29 | 中国建筑第八工程局有限公司 | Construction method for changing lifting arm of heavy horizontal-arm tower crane at high altitude |
-
2014
- 2014-09-16 CN CN201410470790.XA patent/CN104386598A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104692261A (en) * | 2015-03-24 | 2015-06-10 | 启东建筑集团有限公司 | Symmetrical dismounting construction method for attachment device of tower crane |
| CN105712218A (en) * | 2016-03-31 | 2016-06-29 | 中国建筑第八工程局有限公司 | Construction method for changing lifting arm of heavy horizontal-arm tower crane at high altitude |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100519396C (en) | Gin pole integrated dismounting method for tower crane | |
| CN104284857A (en) | Heavy lifting apparatus and method | |
| CN102587288B (en) | Method for lifting steel box girder segments of cable-stayed bridge | |
| CN103863955A (en) | A self-introducing system and a tower crane with the self-introducing system | |
| CN106315426B (en) | A kind of assembling flat-top tower crane for building is installed, jacking method | |
| CN107697817A (en) | A kind of novel tower slings the method that weighing arm becomes length in the air | |
| CN108975181A (en) | A kind of method for dismounting of derrick crane | |
| CN110104571B (en) | Wire rope pre-tightening method for offshore engineering cranes | |
| CN201362571Y (en) | Equipment of cross beam for hoisting arch-first and girder-late tied bars arch bridge | |
| CN113264458A (en) | Tower crane system and method for removing attachment rod thereof | |
| CN104386598A (en) | Dismantling method for tower crane jib | |
| CN115522460A (en) | A method for hoisting stiffening beams of suspension bridges | |
| CN105110205B (en) | A kind of reverse method for dismounting of derrick crane | |
| CN211971577U (en) | Tower crane system | |
| CN111762697B (en) | Large-span cable crane dismantling construction method adjacent to railway business line | |
| CN109132880B (en) | Method for disassembling portal crane | |
| CN114784708B (en) | Composite cable installation method for newly-built jacket | |
| CN109279519B (en) | Method for replacing steel wire rope of tower crane hoisting mechanism | |
| CN111392612A (en) | Device and method for high-altitude self-disassembly of tower crane arm rod | |
| CN102061681A (en) | Fixed dual-hoisting point cantilever track type joist truss installing method | |
| CN105883645B (en) | Method for dismantling attachment device of tower crane | |
| CN205132977U (en) | Movable swing arm tower machine installation wire rope | |
| CN115367637A (en) | Construction process method for sectionally disassembling large arm of tower head pull rod type tower crane | |
| CN113200465B (en) | Aerial dismantling method of tower crane for special structure construction | |
| CN116161564A (en) | Disassembly construction method of tower crane |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150304 |