CN101476280A - Variable height double-layer combined steel pipe concrete arch rib and its construction method - Google Patents
Variable height double-layer combined steel pipe concrete arch rib and its construction method Download PDFInfo
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- CN101476280A CN101476280A CNA2008102374314A CN200810237431A CN101476280A CN 101476280 A CN101476280 A CN 101476280A CN A2008102374314 A CNA2008102374314 A CN A2008102374314A CN 200810237431 A CN200810237431 A CN 200810237431A CN 101476280 A CN101476280 A CN 101476280A
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Abstract
The invention relates to a height variable double layer combined steel pipe concrete arch rib used in steel pipe concrete arch bridge and construction method thereof. The height variable double layer combined steel pipe concrete arch rib consists of an arch support, a connection plate between the upper and the lower layer of steel pipe and a connection web member; the upper and the lower layer of steel pipe are poured by slight expansion concrete; and the distance between the upper and the lower layer of steel pipe reduces gradually front the arch foot to the arch top. The construction method comprises: manufacturing the arch rib segments in factory: keeping a variable distance between the upper and lower of steel pipe, and connecting the connection plate and the connection web member between the steel pipes by welding; transporting the manufactured arch rib segments from factory to construction site; lifting and mounting the arch rib segments from arch foot to arch top in order into a whole arch rib; pouring slight expansion concrete into the upper and the lower layer of steel pipe to form the steel pipe concrete arch rib structure. The arch rib in the invention achieves the advantages of higher structure rigidity, reasonable bearing reliability, convenient construction, low engineering cost and grace figuration, is suitable for various large and medium-sized steel pipe arch bridges.
Description
Technical field
The present invention relates to arch rib and job practices thereof in a kind of big-and-middle-sized concrete-filled steel tubes arch bridge.
Background technology
Build high-speed railway, Line for Passenger Transportation in recent years in a large number, the concrete-filled steel tubes arch bridge of topography and geomorphologies such as various leap rivers, highway, railway, dyke continues to bring out thereupon, requires the concrete-filled steel tubes arch bridge design to constantly bring forth new ideas, develop and promote with building technology.
Concrete-filled steel tubes arch bridge mainly is made up of arch rib, girder, hoist cable, and hoist cable is delivered to arch rib with girder deadweight, bridge floor second phase dead load and mobile load, so arch rib is stressed huge.Steel pipe concrete arch rib is the main stress member of concrete-filled steel tubes arch bridge, whether safety, economy and the beam-ends corner whether rib structure rationally is related to whole bridge satisfies the road-ability of bullet train, so rib structure is the key technical problem in this type of arch bridge design.
Common arch rib pattern is the equal altitudes double-layer combined steel pipe concrete arch rib.Though this arch rib pattern has its reasonability, also has following weak point:
(1) aspect stressed, arch rib arch springing place is stressed huge, and particularly its moment of flexure under the mobile load effect is bigger, and the equal altitudes arch rib usually need be more near the arch rib steel pipe thickening arch springing, increased construction costs,
(2) aspect the beam-ends corner, freely-supported Steel Pipe Concrete Tied-arch Bridge arch springing place is just at beam-ends, and the whole arch rib rigidity of equal altitudes arch rib unanimity does not strengthen at the arch springing place, so its beam-ends corner can not satisfy the requirement of standard to high-speed railway bridge usually,
(3) aspect the bridge view, the whole arch rib height of equal altitudes arch rib unanimity, it is more single to seem on view, lacks stereovision and innervation.
Summary of the invention
The objective of the invention is at above-mentioned present situation, it is bigger, stressed rationally reliable to aim to provide a kind of rigidity of structure, the construction needs that can adapt to high-speed railway bridge preferably, easy construction, beautiful design, the variable height double-layer combined steel pipe concrete arch rib that construction costs is low.
The implementation of the object of the invention is, variable height double-layer combined steel pipe concrete arch rib, arc upper strata steel pipe, lower floor steel pipe two ends are fixed on the abut, be cast with slightly expanded concrete in upper strata steel pipe, the lower floor's steel pipe, between arc upper strata steel pipe, the lower floor's steel pipe by junction plate be connected web member and connect, spacing gradually reduces to the vault place from arch springing.
The job practices of variable height double-layer combined steel pipe concrete arch rib, concrete steps are as follows:
A, adopt plate rolling tube, welding, hot bending to be processed into rib-lifting section in factory, during manufacturing, will be placed to degree of uprising form between the upper and lower layer steel pipe, promptly the upper and lower layer in vault place steel pipe be at a distance of nearer, arch springing place levels steel pipe apart from each other,
B, junction plate is linked with the upper and lower layer steel pipe weldering of rib-lifting section by the bevel fillet weld,
C, employing bevel intersection weld seam will connect web member to be linked with the upper and lower layer steel pipe weldering of rib-lifting section,
D, the rib-lifting section that factory is made are transported to the job site, design linked with arch springing at the rib-lifting section at arch springing place,
E, lift rib-lifting section successively at the construction field (site), and splice, form whole arch rib from arch springing to the vault place,
Slightly expanded concrete is poured in the layer steel pipe up and down in f, scene, forms the steel pipe concrete arch rib structure.
The present invention has reduced the beam-ends corner of freely-supported Steel Pipe Concrete Tied-arch Bridge greatly, makes it can satisfy the driving requirement of high-speed railway, Line for Passenger Transportation preferably.Improve simultaneously the stress at long-span steel pipe concrete arch rib arch springing position again effectively, thereby saved investment.With the arch rib of the present invention's construction, the rigidity of structure is bigger, stressed rationally reliable, easy construction, low, the beautiful design of construction costs.The present invention is applicable to various big-and-middle-sized concrete-filled steel tubes arch bridge.
Description of drawings
Fig. 1 is a structural representation of the present invention,
Fig. 2 is that the A-A of Fig. 1 is to cut-away view
Fig. 3 is that the B-B of Fig. 1 is to cut-away view
The specific embodiment
With reference to Fig. 1,2,3, variable height double-layer combined steel pipe concrete arch rib of the present invention is by upper and lower layer steel pipe, upper and lower layer steel pipe junction plate, and upper and lower layer steel pipe connects compositions such as web member.Arc upper strata steel pipe 1, lower floor's steel pipe 2 two ends are fixed on the abut 6, cast slightly expanded concrete 5 in upper strata steel pipe 1, the lower floor's steel pipe 2, pass through junction plate 3 between arc upper strata steel pipe 1, the lower floor's steel pipe 2 and be connected web member 4 connections, spacing gradually reduces to the centre from two ends.
The job practices of variable height double-layer combined steel pipe concrete arch rib, concrete steps are as follows:
A, adopt plate rolling tube, welding, hot bending to be processed into rib-lifting section in factory, during manufacturing, will be placed to degree of uprising form between the upper and lower layer steel pipe, promptly the upper and lower layer in vault place steel pipe be at a distance of nearer, arch springing place levels steel pipe apart from each other,
B, junction plate is linked with the upper and lower layer steel pipe weldering of rib-lifting section by the bevel fillet weld,
C, employing bevel intersection weld seam will connect web member to be linked with the upper and lower layer steel pipe weldering of rib-lifting section,
D, the rib-lifting section that factory is made are transported to the job site, design linked with arch springing at the rib-lifting section at arch springing place,
E, lift rib-lifting section successively at the construction field (site), and splice, form whole arch rib from arch springing to the vault place,
Slightly expanded concrete is poured in the layer steel pipe up and down in f, scene, forms the steel pipe concrete arch rib structure.
Claims (2)
1, variable height double-layer combined steel pipe concrete arch rib, it is characterized in that arc upper strata steel pipe, lower floor steel pipe two ends are fixed on the abut, be cast with slightly expanded concrete in upper strata steel pipe, the lower floor's steel pipe, between arc upper strata steel pipe, the lower floor's steel pipe by junction plate be connected web member and connect, spacing gradually reduces to the centre from two ends.
2, the job practices of the described variable height double-layer combined steel pipe concrete arch rib of claim 1 is characterized in that concrete steps are as follows:
A, adopt plate rolling tube, welding, hot bending to be processed into rib-lifting section in factory, during manufacturing, will be placed to degree of uprising form between the upper and lower layer steel pipe, promptly the upper and lower layer in vault place steel pipe be at a distance of nearer, arch springing place levels steel pipe apart from each other,
B, junction plate is linked with the upper and lower layer steel pipe weldering of rib-lifting section by the bevel fillet weld,
C, employing bevel intersection weld seam will connect web member to be linked with the upper and lower layer steel pipe weldering of rib-lifting section,
D, the rib-lifting section that factory is made are transported to the job site, design linked with arch springing at the rib-lifting section at arch springing place,
E, lift rib-lifting section successively at the construction field (site), and splice, form whole arch rib from arch springing to the vault place,
Slightly expanded concrete is poured in the layer steel pipe up and down in f, scene, forms the steel pipe concrete arch rib structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102374314A CN101476280A (en) | 2008-12-26 | 2008-12-26 | Variable height double-layer combined steel pipe concrete arch rib and its construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102374314A CN101476280A (en) | 2008-12-26 | 2008-12-26 | Variable height double-layer combined steel pipe concrete arch rib and its construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101476280A true CN101476280A (en) | 2009-07-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNA2008102374314A Pending CN101476280A (en) | 2008-12-26 | 2008-12-26 | Variable height double-layer combined steel pipe concrete arch rib and its construction method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102286929A (en) * | 2011-09-02 | 2011-12-21 | 大连理工大学 | Hinged arch springing of arch center |
| CN102409603A (en) * | 2011-07-29 | 2012-04-11 | 中铁大桥勘测设计院有限公司 | Double-layer steel truss concrete superposed arch structure and construction method thereof |
| CN102729011A (en) * | 2012-07-03 | 2012-10-17 | 宁波二十冶建设有限公司 | Production process for dumbbell-shaped arch rib |
| CN108691265A (en) * | 2018-08-06 | 2018-10-23 | 中铁二院工程集团有限责任公司 | A kind of half-through arch bridge |
-
2008
- 2008-12-26 CN CNA2008102374314A patent/CN101476280A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102409603A (en) * | 2011-07-29 | 2012-04-11 | 中铁大桥勘测设计院有限公司 | Double-layer steel truss concrete superposed arch structure and construction method thereof |
| CN102286929A (en) * | 2011-09-02 | 2011-12-21 | 大连理工大学 | Hinged arch springing of arch center |
| CN102286929B (en) * | 2011-09-02 | 2013-08-28 | 大连理工大学 | Hinged arch springing of arch center |
| CN102729011A (en) * | 2012-07-03 | 2012-10-17 | 宁波二十冶建设有限公司 | Production process for dumbbell-shaped arch rib |
| CN108691265A (en) * | 2018-08-06 | 2018-10-23 | 中铁二院工程集团有限责任公司 | A kind of half-through arch bridge |
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Open date: 20090708 |