CN106436577A - Method for synchronous construction of main bridge and approach bridge of cantilever casting bridge - Google Patents
Method for synchronous construction of main bridge and approach bridge of cantilever casting bridge Download PDFInfo
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- CN106436577A CN106436577A CN201610718616.1A CN201610718616A CN106436577A CN 106436577 A CN106436577 A CN 106436577A CN 201610718616 A CN201610718616 A CN 201610718616A CN 106436577 A CN106436577 A CN 106436577A
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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Abstract
The invention discloses a method for synchronous construction of a main bridge and an approach bridge of a cantilever casting bridge, and belongs to the field of bridge construction. 16 steel beams are symmetrically arranged in the entire section of the cantilever casting bridge according to the center line of a box beam, wherein 6 steel beams are arranged on a top plate, and are respectively numbered as 1#, 2# and 3# symmetrically from the center line of the box beam to the two sides; 4 steel beams are arranged on a web plate, and are numbered as 4# and 5# from top to bottom; and 6 steel beams are arranged on a bottom plate, and are numbered as 8#, 7# and 6# from the center line to the outside. The method is characterized in that the 1# steel beams and the 3# steel beams on the top plate are moved by 15-28cm downwards vertically; the 5# steel beams on the web plate are moved by 2-6cm outwards horizontally; the 6# steel beams on the bottom plate are moved by 60-65cm outwards horizontally; the 7# steel beams on the bottom plate are moved by 72-77cm outwards horizontally; when the construction of the main bridge is performed, the construction of the approach bridge is performed synchronously, and notches are reserved during the construction of cap beams; and at the same time, end transverse diaphragms are not cast during the prefabrication of T beams corresponding to the 4# steel beams and the 5# steel beams, and are cast with wet joints after the closure of the main bridge is completed. Through the adoption of the method disclosed by the invention, the synchronous construction of the main bridge and the approach bridge is realized, so that the purposes of shortening construction period and reducing cost are achieved.
Description
Technical field
The present invention relates to a kind of cantilever bridge construction technology, it is possible to achieve main bridge and access bridge synchronous construction, reach the saving duration,
The purpose of reduces cost.
Background technology
At present, during leap river, mountain valley, existing railway and highway construct a bridge, through hanging frequently with continuous rigid frame, firm structure etc.
The bridge that arm pours, cost is higher, and full-bridge is made up of main bridge and access bridge, and design is generally former head's bridge construction, and rear access bridge is applied
Work.For saving the access bridge construction period it is ensured that full-bridge terminates on schedule, this method using main bridge after first access bridge be access bridge and main bridge simultaneously
Construction, while main bridge construction, access bridge bridge floor also enters cross girders horse simultaneously and sets and the construction of other appurtenant works, greatlys save
Duration, provide more work surfaces simultaneously.After the completion of firm structure construction main body, get through bridge floor passage, so that totally entering
Degree quality controllable, safe and reliable on the basis of, save duration, reduces cost.
Content of the invention
The present invention realizes main bridge and access bridge synchronous construction, reaches saving duration, the purpose of reduces cost.
Cantilever bridge main bridge approach bridge method for synchronously constructing, has 16 bundle steel bundles, according to box beam center line in the whole section of cantilever bridge
It is arranged symmetrically；Top board sets 6 bundles, and numbering is symmetrically carried out from box beam center line to both sides, respectively 1#, 2#, 3#；Web sets 4 bundles, numbering
It is from up to down 4#, 5#；Base plate sets 6 bundles, and outwards numbering from center line is 8#, 7#, 6#；
Top board steel bundle 1# and 3# is moved vertically downward 15～28cm, web steel bundle 5# translates 2～6cm, base plate laterally
Steel bundle 6# translates 60～65cm laterally, and Bottom Board Steel bundle 7# translates 72～77cm laterally；
Access bridge synchronous construction while main bridge construction, and at flash bent cap 6#, 7#, during Coping Construction, reserve width 90cm
× deep 30cm notch, reserved width 50cm × depth 30cm notch at 8#, end diaphragm plate when prefabricated of the T beam at corresponding 4#, 5# simultaneously
First do not pour, pour together with wet seam after the closure of main bridge.
Construction sequence for superstructure is as shown in Fig. 5 construction flow chart.
The present invention, compared with access bridge construction method after traditional former head's bridge, can increase work surface, and reasonable arrangement is constructed, and reduces
The work holdup, treat work phenomenon, improve work efficiency, create favourable work surface, effectively can shorten the construction period, can be in same type bridge
Adopt in construction, the common cantilever method construction overall duration is expected to lift 10% about.
Brief description
The original design main bridge box beam steel bundle of Fig. 1 a and access bridge T beam position view
Fig. 1 b is the schematic side view of Fig. 1 a
Fig. 2 a adopts main bridge box beam steel bundle and access bridge T beam position view after the present invention
Fig. 2 b is the schematic side view of Fig. 2 a
Fig. 3 is steel structure bridge construction operation each position schematic diagram
Fig. 4 a is bridge construction operation schematic cross-sectional view
Fig. 4 b is the schematic side view of Fig. 4 a
Fig. 5 construction flow chart
In figure：1 main bridge seat
2 approach bridge support
3 main bridge box beam steel strand wires anchor bundles
4 bridge piers
5 main bridge box beam edge lines
6 access bridge Precast T-Beams
Specific embodiment
The main bridge of cantilever bridge, access bridge method for synchronously constructing, are embodied as：
For realizing the purpose of access bridge main bridge synchronous construction, adjust main bridge box beam end steel bundle stretching notch position：By top board steel
Bundle 1# and 3# is moved vertically downward 28cm, and web steel bundle 5# translates 6cm laterally, and Bottom Board Steel bundle 6# translates 65cm, bottom laterally
Slab bundle 7# translates 73cm laterally, does not enable in addition to the tensioning of two ends except top board steel bundle 2# has to conflict with T beam position after adjustment, its
He all can achieve two ends tensioning (particular location is shown in Fig. 2) by tensioning bundle.2# steel bundle is line beam, and length only has 21.2m, is computed,
Take one-end tension loss of prestress less, design requirement can be met using strengthening tensioning, during construction can there be pre-buried fixing end P anchor
Effect ensures tensioning quality.For ensureing tensioning space, at flash bent cap 6#, 7#, during Coping Construction, reserve width 90cm × depth 30cm groove
Mouthful, reserved width 50cm × depth 30cm notch at 8#, correspond to end diaphragm plate when prefabricated of the T beam at 4#, 5# simultaneously and first do not pour, treat
Pour together with wet seam after main bridge closure.
Taking certain bridge as a example：
First, the original design situation of bridge
477 meters of overall length of bridge, crosses over river, and the main bridge of left and right line is all continuously firm using 51+90+51 pre-stress concrete box beam
Structure, access bridge superstructure is 30m Precast T-Beam.Adopt Hanging Basket Cantilever Casting Construction according to design requirement, all prestressed strands are opened
Draw and must adopt two ends tensioning, have 16 bundle steel bundles in whole section, be arranged symmetrically according to box beam center line；Top board sets 6 bundles, numbering
Symmetrically carry out from box beam center line to both sides, respectively 1#, 2#, 3#；Web sets 4 bundles, and numbering is from up to down 4#, 5#；Base plate sets 6
Bundle, outwards numbering from center line is 8#, 7#, 6# (as shown in Figure 1).From main bridge box beam steel bundle with access bridge T beam position view (see figure
1) see, affected by access bridge T beam and bearing pad stone when top board steel bundle 1#, 2#, 3# and Bottom Board Steel bundle 6#, 7#, 8# tensioning, wherein 6#,
7#, 8# Bottom Board Steel bundle stretching notch is located at 3,5 bearing pad stones；1#, 2#, 3# top board steel Shu Shu and T beam space are not enough, no
Method installs stretch-draw jack (stretch-draw jack radius is 25cm, and top board steel beam center is away from T back plate only 20cm), bearing pad stone, T
Erection can be constructed after the completion of needing main bridge closure end bay tensioning, former head's bridge can only be taken to join the two sections of a bridge, etc according to original design scheme, construction
Access bridge T beam could be set up after bearing pad stone.
Construction sequence for superstructure is：
--- end bay steel Shu Zhangla mud jacking simultaneously seals end bay cast-in-place construction --- main bridge closure --- for main bridge suspended pouring of box beam construction
--- --- access bridge T erection --- construction of bridge floor wet seam --- is applied by anticollision barrier for access bridge end cap beam and bearing pad stone construction at end
Work --- deck paving (Fig. 3 is shown in the construction of each position)
2nd, adopt this method condition of construction
For ensureing the construction plan target of bridge, through linking up with design liaison, take adjustment end bay beam-ends steel Shu Zhangla groove
Mouthful scheme solving the problems, such as main bridge, access bridge synchronous construction, that is, after first access bridge T erection, main bridge joins the two sections of a bridge, etc tensioning, in the closure of main bridge
Just realize full-bridge insertion afterwards.
Concrete condition is：Adjust main bridge box beam end steel bundle stretching notch position：Top board steel bundle 1# and 3# is let droop translation
Dynamic 28cm, web steel bundle 5# translates 6cm laterally, and Bottom Board Steel bundle 6# translates 65cm laterally, and Bottom Board Steel bundle 7# translates laterally
73cm, does not enable in addition to the tensioning of two ends except top board steel bundle 2# has to conflict with T beam position after adjustment, and other tensioning bundles all can achieve two
End tensioning (particular location is shown in Fig. 2).2# steel bundle is line beam, and length only has 21.2m, is computed, and takes one-end tension prestressing force
Loss less, can meet design requirement using strengthening tensioning, during construction, pre-buried fixing end P anchor can effectively ensure that tensioning quality.For
Ensure tensioning space, during Coping Construction, reserve width 90cm × depth 30cm notch at flash bent cap 6#, 7#, reserved width 50cm at 8#
× deep 30cm notch, is corresponded to end diaphragm plate when prefabricated of the T beam at 4#, 5# simultaneously and does not first pour, connect with wet after the closure of main bridge
Seam pours together.By being constructed using this method, the bridge overall construction period shifts to an earlier date 1 first quarter moon, accounts for bridge total lever factor
12%, save about 900,000 yuan of engineering cost.
The present invention cross a river, construct a bridge across cheuch, spanning existing railway and highway when, adopt continuous rigid frame, firm structure etc. more
The bridge of cantilever pouring, its span is big, cost is high, and more common precast beam bridge construction is relative complex, and safety requirements is high, the duration
Long.General full-bridge is made up of main bridge and access bridge, and design is generally former head's bridge, the construction of rear access bridge.For saving bridge construction work
Phase, this method is access bridge for main bridge after first access bridge and main bridge is constructed simultaneously, in main bridge cantilever construction it is ensured that full-bridge terminates on schedule
Meanwhile, access bridge bridge floor also construction beam piece erection simultaneously and other appurtenant works, greatly save the duration, provide more simultaneously
Work surface.After the completion of firm structure construction main body, get through bridge floor passage, so that bridge construction is quality controllable, safe and reliable
On the basis of, total lever factor shortens, and cost reduces.
The feature of this method is：
(1) this method construction technology is simple, and by branch's construction method construction, strong operability, construction is easily achieved.Main bridge with
Access bridge is constructed respectively, does not affect mutually.
(2) this method constructing structure is reasonable in design, and mechanical model is clear and definite.Weighted design amount of calculation is less, easy-to-understand, easily
In being grasped by engineers and technicians, it is easy to control.
(3) quality is easily controllable, by reinforcing bar, concrete, tensioning, template control, meet design stress, realize quality
Target.
(4) this method, compared with access bridge construction method after former head's bridge, increases work surface, and reasonable arrangement is constructed, the minimizing work holdup,
Treat work phenomenon, improve work efficiency, create favourable work surface, can effectively shorten the construction period.
Claims (1)
1. cantilever bridge main bridge approach bridge method for synchronously constructing, has 16 bundle steel bundles, according to box beam center line pair in the whole section of cantilever bridge
Claim arrangement；Top board sets 6 bundles, and numbering is symmetrically carried out from box beam center line to both sides, respectively 1#, 2#, 3#；Web sets 4 bundles, and numbering is certainly
Upper is downwards 4#, 5#；Base plate sets 6 bundles, and outwards numbering from center line is 8#, 7#, 6#；
It is characterized in that：Top board steel bundle 1# and 3# is moved vertically downward 15～28cm, web steel bundle 5# translates 2 laterally～
6cm, Bottom Board Steel bundle 6# translate 60～65cm laterally, and Bottom Board Steel bundle 7# translates 72～77cm laterally；
Access bridge synchronous construction while main bridge construction, and at flash bent cap 6#, 7#, during Coping Construction, reserve width 90cm × depth
30cm notch, reserved width 50cm × depth 30cm notch at 8#, end diaphragm plate when prefabricated of the T beam at corresponding 4#, 5# is first not simultaneously
Pour, pour together with wet seam after the closure of main bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610718616.1A CN106436577A (en) | 2016-08-25 | 2016-08-25 | Method for synchronous construction of main bridge and approach bridge of cantilever casting bridge |
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|---|---|---|---|
| CN201610718616.1A CN106436577A (en) | 2016-08-25 | 2016-08-25 | Method for synchronous construction of main bridge and approach bridge of cantilever casting bridge |
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| CN106436577A true CN106436577A (en) | 2017-02-22 |
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| CN201610718616.1A Pending CN106436577A (en) | 2016-08-25 | 2016-08-25 | Method for synchronous construction of main bridge and approach bridge of cantilever casting bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111287096A (en) * | 2020-04-03 | 2020-06-16 | 中国铁建大桥工程局集团有限公司 | Closure construction method for continuous rigid frame beam of lower-towing super large bridge |
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| JP2004132139A (en) * | 2002-08-09 | 2004-04-30 | Mitsubishi Heavy Ind Ltd | Construction method for bridge, and superstructure work of bridge |
| CN101781879A (en) * | 2010-01-21 | 2010-07-21 | 中铁二十局集团有限公司 | Construction method of single-pylon cable-stayed bridge without dorsal cables |
| CN105544409A (en) * | 2015-12-28 | 2016-05-04 | 中交一公局桥隧工程有限公司 | Erecting composite beam on-site section splicing girder construction technology of double guide beam bridge erecting machine |
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2016
- 2016-08-25 CN CN201610718616.1A patent/CN106436577A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004132139A (en) * | 2002-08-09 | 2004-04-30 | Mitsubishi Heavy Ind Ltd | Construction method for bridge, and superstructure work of bridge |
| CN101781879A (en) * | 2010-01-21 | 2010-07-21 | 中铁二十局集团有限公司 | Construction method of single-pylon cable-stayed bridge without dorsal cables |
| CN105544409A (en) * | 2015-12-28 | 2016-05-04 | 中交一公局桥隧工程有限公司 | Erecting composite beam on-site section splicing girder construction technology of double guide beam bridge erecting machine |
Non-Patent Citations (2)
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| 傅重阳: "刚构桥边跨现浇段与引桥架设同步施工技术研究", 《山西交通科技》 * |
| 杨永伟等: ""酉水大桥引桥T 梁制、架和主桥悬灌同时施工的工艺研究"", 《公路工程》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111287096A (en) * | 2020-04-03 | 2020-06-16 | 中国铁建大桥工程局集团有限公司 | Closure construction method for continuous rigid frame beam of lower-towing super large bridge |
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Application publication date: 20170222 |