CN102635070B - Mutual-pulling type vertical turning construction method for steel towers of cable-stayed bridge - Google Patents
Mutual-pulling type vertical turning construction method for steel towers of cable-stayed bridge Download PDFInfo
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- CN102635070B CN102635070B CN201210100022.6A CN201210100022A CN102635070B CN 102635070 B CN102635070 B CN 102635070B CN 201210100022 A CN201210100022 A CN 201210100022A CN 102635070 B CN102635070 B CN 102635070B
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Abstract
The invention relates to a mutual-pulling type vertical turning construction method for steel towers of a cable-stayed bridge. The mutual-pulling type vertical turning construction method includes that bridge deck is used as a welding construction platform to finish welding operation of the steel towers on the left side and the right side, and the steel towers on the two sides respectively horizontally move in place; draw bars and press bars are respectively mounted on the steel towers on the two sides so as to form triangular supports; a flexible bearing steel stand penetrates into a rotating cylinder, and is connected to the top ends of the triangular supports on the two sides; and hydraulic synchronous lifting technology is controlled by a computer, the steel tower on the right side is used as a support at first, the steel tower on the left side vertically turns, then the steel tower on the left side is used as a support after turning, and the steel tower on the right side turns vertically. The mutual-pulling type vertical turning construction method for the steel towers of the cable-stayed bridge can avoid high-altitude welding operation of the steel towers of the bridge, the quality of weld joints is controlled more easily, safety of construction operation is improved, construction cost is reduced, and construction efficiency is improved. A computer control system is simple in operation and easy in control, and an operation process is safe and reliable.
Description
Technical field
The present invention relates to bridge head tower construction method, relate in particular to the mutual pull-type vertical turn construction method of a kind of cable stayed bridge head tower.
Background technology
Along with the development of China's economy, the engineering of building of Longspan Bridge gets more and more.At present, for the installation of bridge steel tower, conventionally adopt upright assembled way to construct, namely by setting up scaffold and support platform, use large-tonnage tower crane or crane to carry out piecemeal assembled.There is following shortcoming in this construction technology: 1) danger of work high above the ground is large; 2) the space welding quality of head tower is difficult to guarantee; 3) the space mounting precision of head tower is difficult to control.
In order to guarantee head tower positioning welding quality, reduce work high above the ground, guarantee the safety of construction, domesticly also occurred that employing " cable stayed bridge steel tower vertical turn method " constructs: with girder steel bridge floor, bridge, from as support, carries out vertical turn construction.This construction technology easily causes the stress deformation of girder steel bridge floor.
Summary of the invention
The object of this invention is to provide that a kind of to have construction simple, installation accuracy is high, convenient welding, and dangerous little, work high above the ground is few, and the construction period is short, cost is low, efficiency is high, the mutual pull-type vertical turn construction method of the cable stayed bridge head tower of quality high.
The mutual pull-type vertical turn construction method of cable stayed bridge head tower that the present invention provides, is to utilize bridge floor as welding procedure platform, completes the welding job of left and right sides head tower, and the head tower of both sides is moved horizontally and put in place respectively.Then, pull bar and depression bar are installed respectively on the head tower of both sides, to form tripod.With flexible load-bearing steel strand, penetrate the oil cylinder of turning, and connect the top of both sides tripod.Adopt computer control hydraulic synchronous lifting technique, first take right side head tower as support, carry out the vertical turn of left side head tower, then take that to complete the left side head tower of turning be support, carry out the vertical turn of right side head tower.
The mutual pull-type vertical turn construction method of cable stayed bridge head tower that the present invention proposes, concrete steps are as follows:
(1) left side head tower tower seat and right side head tower tower seat are installed respectively on existing left side Main Pier of Bridges and right side Main Pier of Bridges, using the girder steel bridge floor that completes as welding procedure platform, on girder steel bridge floor both sides, weld respectively left side head tower and right side head tower, then left side pull bar and left side depression bar are set on the head tower of left side, left side head tower, left side pull bar and left side depression bar form left side tripod, accordingly, right side pull bar and right side depression bar are set on the head tower of right side, right side head tower, right side pull bar and right side depression bar form right side tripod, flexible load-bearing steel strand two ends connect respectively left side tripod and tripod top, right side vertex of a triangle, and flexible load-bearing steel strand penetrate the oil cylinder of turning,
(2) on right side head tower 9, place head tower counterweight 12, for the rotator construction of left side head tower 3 ready.Utilize computer control hydraulic synchronizing lifting system, by the oil cylinder of turning by flexible load-bearing steel strand 6 tensionings, progressively promote left side head tower 3, make the left side head tower certain angle of turning, continue the flexible load-bearing steel strand 6 of tensioning, complete the rotator construction of left side head tower 3, left side head tower 3 is completed and close up, then unload flexible load-bearing steel strand 6 load, stretch-draw back steel strand 13 on left side head tower 3;
(3) remove the head tower counterweight 12 on right side head tower 9, for turning of right side head tower 9 ready, by the oil cylinder of turning by flexible load-bearing steel strand 6 tensionings, progressively promote right side head tower 9, make the right side head tower certain angle of turning, continue the flexible load-bearing steel strand 6 of tensioning, complete the rotator construction of right side head tower 9, right side head tower 9 is completed to be closed up, then unload flexible load-bearing steel strand 6 load, remove the back steel strand 13 on the head tower 3 of left side, remove left side pull bar 4 and left side depression bar 5, right side pull bar 8 and right side depression bar 7, and flexible load-bearing steel strand 6.Complete the rotator construction of cable stayed bridge head tower.
Advantage of the present invention is: can avoid the overhead welding operation of bridge steel tower, the quality of butt welded seam is more easily controlled, improve the safety of construction operation, reduce construction cost, improve efficiency of construction.Computer control system simple to operate, is easy to control, and operation process is safe and reliable.
Accompanying drawing explanation
Fig. 1 is the mutual pull-type vertical turn constructing structure schematic diagram of cable stayed bridge head tower.
Fig. 2 is the schematic flow sheet first step of steel tower vertical turn construction.
Fig. 3 is the schematic flow sheet second step of steel tower vertical turn construction.
Fig. 4 is schematic flow sheet the 3rd step of steel tower vertical turn construction.
Fig. 5 is schematic flow sheet the 4th step of steel tower vertical turn construction.
Fig. 6 is schematic flow sheet the 5th step of steel tower vertical turn construction.
Fig. 7 is schematic flow sheet the 6th step of steel tower vertical turn construction.
Fig. 8 is schematic flow sheet the 7th step of steel tower vertical turn construction.
Fig. 9 is schematic flow sheet the 8th step of steel tower vertical turn construction.
Number in the figure: the 1 main pier in left side that is bridge, 2 is left side head tower tower seat, 3 is left side head tower, 4 is left side pull bar, 5 is left side depression bar, and 6 is flexible load-bearing steel strand, and 7 is right side depression bar, 8 is right side pull bar, 9 is right side head tower, and 10 is right side head tower tower seat, the 11 main piers in right side that are bridge, 12 is head tower counterweight, and 13 is back steel strand.
The specific embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1: the present invention has provided the mutual pull-type vertical turn construction method of a kind of cable stayed bridge head tower.As shown in Figure 1, first, on the left side Main Pier of Bridges 1 of having built and right side Main Pier of Bridges 11, fixedly mount respectively left side head tower tower seat 2 and right side head tower tower seat 10, recycle completed girder steel bridge floor as welding procedure platform, complete the welding job of left side head tower 3 and right both sides head tower 9, and left side head tower 3 and right side head tower 9 are moved horizontally and put in place respectively.Left side pull bar 4 and left side depression bar 5 are installed on left side head tower 3, are formed left side tripod, right side pull bar 8 and right side depression bar 7 are installed on right side head tower 9, form right side tripod.With flexible load-bearing steel strand 6, penetrate the oil cylinder of turning, and connect left and right side tripod.
Fig. 2 is the preparation schematic diagram before head tower rotator construction.On right side head tower 9, place head tower counterweight 12, for the rotator construction of left side head tower 3 ready.Utilize computer control hydraulic synchronizing lifting system, by the oil cylinder of turning, by flexible load-bearing steel strand 6 tensionings, progressively promote left side head tower 3, turn 35
o, as shown in Figure 3.Continue the flexible load-bearing steel strand 6 of tensioning, complete the rotator construction of left side head tower 3, left side head tower 3 is completed and close up, then unload 50% of flexible load-bearing steel strand 6 load, as shown in Figure 4.Stretch-draw back steel strand 13 on left side head tower 3, as shown in Figure 5.Remove the head tower counterweight 12 on right side head tower 9, for turning of right side head tower 9 ready, as shown in Figure 6.By the oil cylinder of turning, by flexible load-bearing steel strand 6 tensionings, progressively promote right side head tower 9, turn 35
o, as shown in Figure 7.Continue the flexible load-bearing steel strand 6 of tensioning, complete the rotator construction of right side head tower 9, right side head tower 9 is completed and close up, then unload flexible load-bearing steel strand 6 load, as shown in Figure 8.Then, remove the back steel strand 13 on the head tower 3 of left side, as shown in Figure 9.Finally, remove left side pull bar 4 and left side depression bar 5, right side pull bar 8 and right side depression bar 7, and flexible load-bearing steel strand 6.Complete the rotator construction of cable stayed bridge head tower.
Claims (1)
1. the mutual pull-type vertical turn construction method of cable stayed bridge head tower, is characterized in that concrete steps are as follows:
(1) left side head tower tower seat and right side head tower tower seat are installed respectively on existing left side Main Pier of Bridges and right side Main Pier of Bridges, using the girder steel bridge floor that completes as welding procedure platform, on girder steel bridge floor both sides, weld respectively left side head tower (3) and right side head tower (9), left side pull bar (4) and left side depression bar (5) are then set on left side head tower (3), left side head tower (3), left side pull bar (4) and left side depression bar (5) form left side tripod, accordingly, right side pull bar (8) and right side depression bar (7) are set on right side head tower (9), right side head tower (9), right side pull bar (8) and right side depression bar (7) form right side tripod, flexible load-bearing steel strand (6) two ends connect respectively left side tripod and tripod top, right side vertex of a triangle, and flexible load-bearing steel strand (6) penetrate the oil cylinder of turning,
(2) the upper head tower counterweight (12) of placing of right side head tower (9), for the rotator construction of left side head tower (3) ready; Utilize computer control hydraulic synchronizing lifting system, by the oil cylinder of turning by flexible load-bearing steel strand (6) tensioning, progressively promote left side head tower (3), make the left side head tower certain angle of turning, continue the flexible load-bearing steel strand (6) of tensioning, complete the rotator construction of left side head tower (3), left side head tower (3) is completed and close up, then unload flexible load-bearing steel strand (6) load, at the upper stretch-draw back steel strand (13) of left side head tower (3);
(3) remove the head tower counterweight (12) on right side head tower (9), for turning of right side head tower (9) ready, by the oil cylinder of turning by flexible load-bearing steel strand (6) tensioning, progressively promote right side head tower (9), make the right side head tower certain angle of turning, continue the flexible load-bearing steel strand (6) of tensioning, complete the rotator construction of right side head tower (9), right side head tower (9) is completed to be closed up, then unload flexible load-bearing steel strand (6) load, remove the back steel strand (13) on left side head tower (3), remove left side pull bar (4) and left side depression bar (5), right side pull bar (8) and right side depression bar (7), and flexible load-bearing steel strand (6), complete the rotator construction of cable stayed bridge head tower.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210100022.6A CN102635070B (en) | 2012-04-09 | 2012-04-09 | Mutual-pulling type vertical turning construction method for steel towers of cable-stayed bridge |
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| CN201210100022.6A CN102635070B (en) | 2012-04-09 | 2012-04-09 | Mutual-pulling type vertical turning construction method for steel towers of cable-stayed bridge |
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| CN102635070B true CN102635070B (en) | 2014-03-05 |
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| CN102839609B (en) * | 2012-08-23 | 2014-06-25 | 中交第二航务工程局有限公司 | Ladder type vertical rotating auxiliary device for aquatic horizontally transported bridge tower |
| CN105113428B (en) * | 2014-10-02 | 2016-08-24 | 温州市申邦市政工程有限公司 | A kind of high-altitude constructing device construction method of installation after bridge rotating |
| CN105821775B (en) * | 2016-03-24 | 2017-07-07 | 中交第四公路工程局有限公司 | Arch rib construction method is overturn using cable crane |
| CN107938518A (en) * | 2017-11-21 | 2018-04-20 | 中铁四局集团钢结构建筑有限公司 | One kind is first turned across busy railway freely-supported steel truss girder translates erection construction method again |
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| US6832459B2 (en) * | 2002-01-18 | 2004-12-21 | Matthew Russell | Methods and apparatus for forming and placing generally horizontal structures |
| CN101122114A (en) * | 2007-09-14 | 2008-02-13 | 中铁大桥局集团第五工程有限公司 | Back-cable-free cable-stayed bridge steel tower vertical turn construction method |
| CN201695342U (en) * | 2010-06-28 | 2011-01-05 | 中铁二十局集团有限公司 | Adjustable inner support rod for arch rib tilting construction |
| CN102061668A (en) * | 2010-12-21 | 2011-05-18 | 天津第七市政公路工程有限公司 | Vertical swiveling construction method of dual-steel-arch tower |
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