CN102953553A - Method for mounting large-span pipe truss by using boom luffing mechanism - Google Patents
Method for mounting large-span pipe truss by using boom luffing mechanism Download PDFInfo
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- CN102953553A CN102953553A CN2012104588831A CN201210458883A CN102953553A CN 102953553 A CN102953553 A CN 102953553A CN 2012104588831 A CN2012104588831 A CN 2012104588831A CN 201210458883 A CN201210458883 A CN 201210458883A CN 102953553 A CN102953553 A CN 102953553A
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- 238000010276 construction Methods 0.000 claims abstract description 10
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- 238000003466 welding Methods 0.000 claims abstract description 8
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 238000009434 installation Methods 0.000 claims abstract description 6
- 238000003032 molecular docking Methods 0.000 claims description 7
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Abstract
A method for mounting a large-span pipe truss by using an arm support luffing mechanism comprises the following steps: firstly, by calculating the span of the truss and the bearing capacity of a rod piece, the whole truss can be hoisted in 3 sections, namely, a ground section at two sides and a high-altitude section in the middle; pre-assembling the trusses before hoisting; respectively calculating the tension of the steel rope when the edge point A is positioned at an ideal position and an installation allowance position is reserved under the action of self weight of the landed sections on the two sides, wherein under the two conditions, the truss rod piece has no over-stress condition; calculating displacement values of C, D at two ends of the middle section under the hoisting condition of the crane, and adjusting the positions of the rope binding points to ensure that the displacement of the two points is less than or equal to 0.5 mm; fifthly, the support of the landing point can bear additional pressure during construction after calculation. The invention not only can reduce the construction cost, but also can ensure that the middle closure segment is smoothly positioned during installation, thereby providing guarantee for the quality of a high-altitude welding port.
Description
Technical field:
The invention belongs to a kind of mounting method of steel building, particularly a kind of luffing range of cantilever support mechanism that utilizes carries out the method that Node In Large-span Pipe Truss is installed.
Background technology:
The method that large span console mode a truss adopts is with truss sections mostly, at interface prop is set, and segmentation winches to the overhead connection assembling.This mounting method precision easily guarantees, handling safety, but for the larger engineering of area, the prop expense is too high, if will reduce the prop expense, then needs the prop recycling is repeatedly removed during construction and installed.But for the weak situation of fabricating yard soil property, prop basis expense is high, and not only comprehensive cost is high, and affects construction speed and construction quality.
Summary of the invention
Purpose of the present invention just is to overcome above-mentioned the deficiencies in the prior art, and provide a kind of luffing range of cantilever support mechanism that utilizes to carry out the method that Node In Large-span Pipe Truss is installed, the method can not only reduce construction costs, and closure segment is in place smoothly in the middle of can guarantee to install the time, for overhead welding mouth quality is given security.
As above design, technical scheme of the present invention is: a kind of luffing range of cantilever support mechanism that utilizes carries out the method that Node In Large-span Pipe Truss is installed, and it is characterized in that: comprise the steps:
1. by calculating truss span and load bearing capability of a member, whole truss structure can be divided 3 sections liftings is the both sides sections of landing, middle high dead band;
2. truss had all carried out pre-assembly unit before lifting;
3. calculated respectively the both sides section of landing under Gravitative Loads, the pulling force at steel cable place when making edge point A be positioned at ideal position and reserve the installation residue position, and in both cases, truss member is all without the overstressing situation;
4. calculated the shift value of interlude two-end-point C, D under the crane lifting operating mode, and adjusted the position of tied rope point, made this 2 displacement≤0.5mm;
5. confirm as calculated the additonal pressure when the pick-up point bearing can bear construction.
Concrete steps of the present invention are:
1. on ground the docking port place of three sections truss is increased solid welding before installing and decide otic placode, wedge and docking junction plate;
2. with crane the two ends section of landing is installed, and interim luffing range of cantilever support fixed adjustment device is installed the section of landing is carried out temporary fixed, be connected in hinged way between the section of landing and support bar and the bearing;
3. measure and the high-altitude coordinate position of definite two ends section of landing; By using the pulling force of steel cable in the jib fixed adjustment device, adjust the coordinate position of two ends canned paragraph, the surplus that interlude is reserved with regard to the every side of bit space is 3~5mm, is the smooth adequate preparation of carrying out in place of interlude;
4. with the both sides section of landing respectively near end points, draw and establish cable wind rope, adjust the level angle of truss, and fixing;
5. according to length and the rigidity of interlude, select bicycle or two platform to lift the lifting interlude;
6. after the interlude hoisted in position arrives basic accurate location, angle by luffing range of cantilever support institutional adjustment fixed adjustment device makes both sides canned paragraph truss carry out location, accurate high-altitude, by wedge the interlude height is carried out inching, until height with after horizontal level all adjusts to ideal position, the fixedly otic placode that connects two sections pipe truss, overhead connection is finished, butt welding mouth weld seam.
Above-mentioned wedge is welded on pipe chord member of truss top, is welded with wedge ring on the wedge.
Above-mentioned jib fixed adjustment device comprises assembly pulley, safety line, Chain block, balancing weight and pulls frame; Assembly pulley is connected an end and all is connected with the top of pulling frame with safety line, assembly pulley is connected the other end and is connected with balancing weight with safety line; The top of pulling frame is connected with fixing tightwire, and the bottom of pulling frame is hinged with the section of landing main couple bearing; Chain block one end is connected with safety line, and the other end is connected with balancing weight.
The present invention can be reduced in the prop expense that Large Span Spatial Truss is installed under the site condition of soil property weakness, can not only reduce construction costs, and closure segment is in place smoothly in the middle of can guarantee to install the time, for overhead welding mouth quality is given security.
Description of drawings:
Fig. 1 is pipe truss sections schematic diagram;
Fig. 2 is that the section of landing is installed calculation diagram (dotted line is take-up device);
Fig. 3 is that interlude is installed calculation diagram;
Fig. 4 is the fixing front view of otic placode scheme of installation;
Fig. 5 is the top view of Fig. 4;
Fig. 6 is the structural representation of wedge;
Fig. 7 is the sectional drawing of the A-A of Fig. 6;
Fig. 8 is the schematic diagram of jib fixed adjustment device;
Fig. 9 is the A section enlarged drawing of Fig. 8;
Figure 10 is the B section enlarged drawing of Fig. 8.
Figure 11 is the fixedly schematic diagram of truss cable wind rope;
Figure 12 is sky docking operation figure.
The specific embodiment:
A kind of luffing range of cantilever support mechanism that utilizes carries out the method that Node In Large-span Pipe Truss is installed, and comprises the steps:
1. by calculating truss span and load bearing capability of a member, whole truss structure can be divided 3 sections liftings is the both sides section of landing a, b, middle high dead band c; (as shown in Figure 1)
2. truss had all carried out pre-assembly unit before lifting;
3. calculated respectively the both sides section of landing under Gravitative Loads, the pulling force at steel cable place when making edge point A be positioned at ideal position and reserve the installation residue position, and in both cases, truss member is all without the overstressing situation; (as shown in Figure 2)
4. calculated horizontal movement value and vertical displacement value e, the f of interlude two-end-point C, D under the crane lifting operating mode, and adjusted the position of tied rope point, made this 2 displacement≤0.5mm; (as shown in Figure 3)
5. confirm as calculated the additonal pressure when the pick-up point bearing can bear construction.
Concrete steps of the present invention are as follows:
1, install before on ground three sections pipe truss 1,2 docking port place increase weldering docking junction plate 3, fixedly otic placode 4, composition backing 5(are fixed in the section of landing in advance) and wedge 7 so that (shown in Fig. 4,5) located in the high-altitude;
2, with crane the two ends section of landing is installed, and interim luffing range of cantilever support fixed adjustment device is installed the section of landing is carried out temporary fixed, be connected in hinged way between the section of landing and support bar and the bearing; (shown in Fig. 8,9,10)
3, the high-altitude coordinate position of measurement and definite two ends section of landing.By using the pulling force of steel cable in the jib fixed adjustment device, adjust the coordinate position of two ends canned paragraph, make interlude reserve certain surplus 3~5mm with regard to the every side of bit space, be the smooth adequate preparation of carrying out in place of interlude; (as shown in Figure 2)
4, with the both sides section of landing respectively near end points, draw and establish cable wind rope, adjust the level angle of truss, and fixing; (as shown in figure 11)
5, according to length and the rigidity of interlude, select bicycle or two platform to lift the lifting interlude;
6, after the interlude hoisted in position arrives basic accurate location, angle by luffing range of cantilever support institutional adjustment fixed adjustment device makes both sides canned paragraph truss carry out location, accurate high-altitude, by wedge the interlude height is carried out inching, until height with after horizontal level all adjusts to ideal position, the fixedly otic placode that connects two sections pipe truss, overhead connection is finished, butt welding mouth weld seam g.(as shown in figure 12)
Above-mentioned wedge 7 is welded on pipe chord member of truss 8,9 tops, is welded with wedge ring 6(on the wedge shown in Fig. 6,7).
Above-mentioned jib fixed adjustment device comprises assembly pulley 10, safety line 11, Chain block 12, balancing weight 13 and pulls frame 14.Assembly pulley is connected an end and all is connected with the top of pulling frame with safety line, assembly pulley is connected the other end and is connected with balancing weight with safety line; The top of pulling frame is connected with fixing tightwire 15, and the bottom of pulling frame and the section of landing main couple a, b bearing are hinged by articulated link chain 16; Chain block 12 1 ends are connected with safety line, and the other end is connected with balancing weight.
The method is by using luffing range of cantilever support mechanism as adjusting device, truss interface end points place is applied external force come the adjusting play, sets up servicing units such as connecting otic placode, voussoir, operating platform and carries out the high-altitude and fix, dock.
Claims (4)
1. one kind is utilized luffing range of cantilever support mechanism to carry out the method that Node In Large-span Pipe Truss is installed, and it is characterized in that: comprise the steps:
1. by calculating truss span and load bearing capability of a member, whole truss structure can be divided 3 sections liftings is the both sides sections of landing, middle high dead band;
2. truss had all carried out pre-assembly unit before lifting;
3. calculated respectively the both sides section of landing under Gravitative Loads, the pulling force at steel cable place when making edge point A be positioned at ideal position and reserve the installation residue position, and in both cases, truss member is all without the overstressing situation;
4. calculated the shift value of interlude two-end-point C, D under the crane lifting operating mode, and adjusted the position of tied rope point, made this 2 displacement≤0.5mm;
5. confirm as calculated the additonal pressure when the pick-up point bearing can bear construction.
2. a kind of luffing range of cantilever support mechanism that utilizes according to claim 1 carries out the method that Node In Large-span Pipe Truss is installed, and it is characterized in that: concrete steps are:
1. on ground the docking port place of three sections truss is increased solid welding before installing and decide otic placode, wedge and docking junction plate;
2. with crane the two ends section of landing is installed, and interim luffing range of cantilever support fixed adjustment device is installed the section of landing is carried out temporary fixed, be connected in hinged way between the section of landing and support bar and the bearing;
3. measure and the high-altitude coordinate position of definite two ends section of landing; By using the pulling force of steel cable in the jib fixed adjustment device, adjust the coordinate position of two ends canned paragraph, the surplus that interlude is reserved with regard to the every side of bit space is 3~5mm, is the smooth adequate preparation of carrying out in place of interlude;
4. with the both sides section of landing respectively near end points, draw and establish cable wind rope, adjust the level angle of truss, and fixing;
5. according to length and the rigidity of interlude, select bicycle or two platform to lift the lifting interlude;
6. after the interlude hoisted in position arrives basic accurate location, angle by luffing range of cantilever support institutional adjustment fixed adjustment device makes both sides canned paragraph truss carry out location, accurate high-altitude, by wedge the interlude height is carried out inching, until height with after horizontal level all adjusts to ideal position, the fixedly otic placode that connects two sections pipe truss, overhead connection is finished, butt welding mouth weld seam.
3. a kind of luffing range of cantilever support mechanism that utilizes according to claim 1 carries out the method that Node In Large-span Pipe Truss is installed, and it is characterized in that: above-mentioned wedge is welded on pipe chord member of truss top, is welded with wedge ring on the wedge.
4. a kind of luffing range of cantilever support mechanism that utilizes according to claim 1 carries out the method that Node In Large-span Pipe Truss is installed, and it is characterized in that: above-mentioned jib fixed adjustment device comprises assembly pulley, safety line, Chain block, balancing weight and pulls frame; Assembly pulley is connected an end and all is connected with the top of pulling frame with safety line, assembly pulley is connected the other end and is connected with balancing weight with safety line; The top of pulling frame is connected with fixing tightwire, and the bottom of pulling frame is hinged with the section of landing main couple bearing; Chain block one end is connected with safety line, and the other end is connected with balancing weight.
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109057363A (en) * | 2018-07-27 | 2018-12-21 | 浙江精工钢结构集团有限公司 | A kind of tower sliding support frame and large span semicircular pipe truss structure construction method |
CN109138446A (en) * | 2018-09-30 | 2019-01-04 | 中建七局第二建筑有限公司 | A kind of Node In Large-span Pipe Truss hanging method |
CN111364622A (en) * | 2020-04-08 | 2020-07-03 | 五冶集团上海有限公司 | Construction method of long-span arched net rack strip-shaped building |
CN111794529A (en) * | 2020-07-15 | 2020-10-20 | 沈阳科维润工程技术有限公司 | Modular construction hoisting method for arch type space pipe truss steel structure system |
CN112458917A (en) * | 2020-11-30 | 2021-03-09 | 中铁大桥局第七工程有限公司 | Truss sheet type closure construction method for truss arch bridge |
CN112878698A (en) * | 2019-11-29 | 2021-06-01 | 中冶(上海)钢结构科技有限公司 | Construction method for separately installing pipe truss and steel casting and sliding for aligning |
CN113982284A (en) * | 2021-10-28 | 2022-01-28 | 中铁三局集团建筑安装工程有限公司 | Installation method of large-span special-shaped steel structure toll booth |
CN114517586A (en) * | 2022-03-10 | 2022-05-20 | 安徽伟宏钢结构集团股份有限公司 | Method for adjusting position deviation in steel structure lifting process |
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JPH0489938A (en) * | 1990-08-01 | 1992-03-24 | Tokyu Constr Co Ltd | Liftup device installing method for truss lifting construction method and truss joining method |
CN1978801A (en) * | 2005-12-06 | 2007-06-13 | 蒋振彦 | Super-span steel skew arch construction method |
JP2007321534A (en) * | 2006-06-05 | 2007-12-13 | Takenaka Komuten Co Ltd | Roof construction method |
CN101586400A (en) * | 2008-05-22 | 2009-11-25 | 中国十五冶金建设有限公司 | Blocking partition adding type lift installation method of net rack |
CN201826541U (en) * | 2010-07-13 | 2011-05-11 | 中冶天工上海十三冶建设有限公司 | Detachable reinforcing steel processing shed |
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2012
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Patent Citations (5)
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JPH0489938A (en) * | 1990-08-01 | 1992-03-24 | Tokyu Constr Co Ltd | Liftup device installing method for truss lifting construction method and truss joining method |
CN1978801A (en) * | 2005-12-06 | 2007-06-13 | 蒋振彦 | Super-span steel skew arch construction method |
JP2007321534A (en) * | 2006-06-05 | 2007-12-13 | Takenaka Komuten Co Ltd | Roof construction method |
CN101586400A (en) * | 2008-05-22 | 2009-11-25 | 中国十五冶金建设有限公司 | Blocking partition adding type lift installation method of net rack |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109057363A (en) * | 2018-07-27 | 2018-12-21 | 浙江精工钢结构集团有限公司 | A kind of tower sliding support frame and large span semicircular pipe truss structure construction method |
CN109057363B (en) * | 2018-07-27 | 2021-02-05 | 浙江精工钢结构集团有限公司 | Tower type sliding support frame and construction method of large-span semicircular pipe truss structure |
CN109138446A (en) * | 2018-09-30 | 2019-01-04 | 中建七局第二建筑有限公司 | A kind of Node In Large-span Pipe Truss hanging method |
CN112878698A (en) * | 2019-11-29 | 2021-06-01 | 中冶(上海)钢结构科技有限公司 | Construction method for separately installing pipe truss and steel casting and sliding for aligning |
CN111364622A (en) * | 2020-04-08 | 2020-07-03 | 五冶集团上海有限公司 | Construction method of long-span arched net rack strip-shaped building |
CN111794529A (en) * | 2020-07-15 | 2020-10-20 | 沈阳科维润工程技术有限公司 | Modular construction hoisting method for arch type space pipe truss steel structure system |
CN112458917A (en) * | 2020-11-30 | 2021-03-09 | 中铁大桥局第七工程有限公司 | Truss sheet type closure construction method for truss arch bridge |
CN112458917B (en) * | 2020-11-30 | 2022-06-17 | 中铁大桥局第七工程有限公司 | Truss sheet type closure construction method for truss arch bridge |
CN113982284A (en) * | 2021-10-28 | 2022-01-28 | 中铁三局集团建筑安装工程有限公司 | Installation method of large-span special-shaped steel structure toll booth |
CN114517586A (en) * | 2022-03-10 | 2022-05-20 | 安徽伟宏钢结构集团股份有限公司 | Method for adjusting position deviation in steel structure lifting process |
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