CN104195946A - Staged implementation method of multi-bridge-floor-layer suspension bridge for highway and rail - Google Patents
Staged implementation method of multi-bridge-floor-layer suspension bridge for highway and rail Download PDFInfo
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- CN104195946A CN104195946A CN201410316828.8A CN201410316828A CN104195946A CN 104195946 A CN104195946 A CN 104195946A CN 201410316828 A CN201410316828 A CN 201410316828A CN 104195946 A CN104195946 A CN 104195946A
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Abstract
The invention discloses a staged construction method of a multi-bridge-floor-layer suspension bridge for a highway and a rail. The suspension bridge is a three-bridge-floor-layer suspension bridge composed of a double-layer parallel main truss structure, rail transit is located on the uppermost layer, and highway traffic is located on the middle layer and the lower layer. The staged construction method of firstly constructing the highway traffic and then constructing the rail transit is adopted, construction on the rail transit can be carried out in the running process of the highway traffic, the scheme of the three-bridge-floor-layer suspension bridge is adopted, structural efficiency can be improved, the adaptive capacity of the structure on terrain is enhanced, the structure can adapt to the requirement for staged construction of the rail transit and the highway traffic, the recent engineering construction investment is effectively reduced, idle resources are avoided, meanwhile, the requirement that existing traffic circulation is not interrupted in the long-term construction period can be met, and the influence of construction on traffic is reduced to the largest extent.
Description
Technical field
The present invention relates to field of bridge construction, particularly the time phasing method of the dual-purpose suspension bridge of the public rail of a kind of multilayer deck.
Background technology
The mode that urban track traffic adopts rail to build jointly conventionally, crosses over rivers, mountain valley with urban road, in the lump to save investment.When crossing river and meeting that boats and ships higher under bridge are current to be required for realizing track traffic, often adopt large-span suspension bridge mode to cross over river surface.The mode that simultaneously adopts rail to build together, can better utilize rare bridge location resource, improves structure efficiency.But owing to being subject to structure stress restriction and affecting, the main push-towing rope of suspension bridge, steel truss girder adopt disposable enforcement to complete conventionally, and reserved good track is crossed the passage in river.In actual conditions, the construction of track routes often lags behind bridge itself, crosses river passage and builds up rear long-term leaving unused, and reduces the utilization ratio of fund.If can be at the beginning of the construction of bridge, consider the scheme of main push-towing rope, steel truss girder built by separate periods, only implement in the recent period highway communication part, during track routes whole implementation at a specified future date, increase track traffic part, resource utilization will be significantly improved, and the current requirement of track traffic can better be adapted to.The rail traffic structure of implementing at a specified future date, except taking into full account the demand of structure stress, the most key is will reduce construction period to the current interference of thoroughfare traffic.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of time phasing method based on the dual-purpose suspension bridge of the public rail of multilayer deck, adopt track traffic and highway communication stage construction, meet the requirement that structure can time phasing, effectively reduce Near Future Project construction and drop into, reduce resources idle.Can also reduce to greatest extent the impact of construction in later period on traffic simultaneously.
The stage construction method of the dual-purpose suspension bridge of the public rail of multilayer deck of the present invention, described bridge is three layers of bridge floor suspension bridge that double-deck parallel main truss structure forms, track traffic is positioned at the superiors, highway communication is arranged in, lower floor, adopt the stage construction method of the track traffic of constructing after first Construction Highway traffic and reduce to greatest extent the interference to existing highway communication operation of track traffic construction period, its construction method comprises the following steps:
A. highway communication construction in the recent period:
A1. first construction basis, bridge tower, anchorage;
A2., main push-towing rope I be installed and set up lower floor's main truss beam and remain in advance the later stage and set up the truss web interface that upper strata main truss is set a roof beam in place, then carrying out deck paving and form lower floor's bridge floor and intermediate deck;
A3. deck paving;
B. track traffic construction at a specified future date:
B1. the main push-towing rope II of constructing setting up on intermediate deck meets the removable operation platform that upper strata trusses set up, and moved, installed location needs, on operation platform, installs and comprises track upper layer bridge panel and the main truss upper chord of beam in length and breadth, and interior side sling is installed;
B2. by the reserved jiont treatment of lower floor's main truss upper strata main truss soffit of girder bar;
B3. carry out that upper deck of bridge is mated formation and track construction.
Further, in step b1, employing mode of assembly on portable assembling support is set up upper strata main truss and is set a roof beam in place.
Further, lower floor's main truss beam adopts the mode of sections whole Transporting, lifting to set up, and after elder generation is hinged, rigidly connects, and forms recent structure; Upper strata main truss rod member adopts loose mail mode to be transported to bridge location king-tower place, assembled piecemeal to main span span centre direction by king-tower; According to the sequence construction of upper layer bridge panel (containing track longitudinal and cross beam) → upper strata chord member → interior side sling.All, after the installation of upper layer bridge panel, interim counterweight is installed on upper layer bridge panel, adjusts the linear of main push-towing rope II, section is installed upper strata main truss web member section by section, removes interim counterweight, and between welding sections, bridge deck seam forms whole upper strata trusses;
Further, described double-deck main truss structure comprises and the upper chord being connected with track cross beam and the middle chord member and the lower chord that are connected respectively with track lower and upper cross-member by web member, is cross-linked to form the node being positioned on chord member between chord member.
Beneficial effect of the present invention: the time phasing method of the dual-purpose suspension bridge of the public rail of multilayer deck of the present invention, in conjunction with track, the river demand of crossing of urban road, vertical layered Traffic Organization is proposed, track traffic is arranged in to the superiors' bridge floor, urban traffic is arranged in middle level according to current direction, lower floor's bridge floor, form the bridge scheme of vertical three layers, three layers of bridge deck traffic are arranged, effectively raise rigidity of section, improve the span ability of bridge, meet the Deformation control requirement that track traffic operation proposes, close orbit construction and lag behind the actual conditions of urban road, bridge construction is adjusted into clad steel truss form, and according to upper, the deadweight that lower floor's steel truss girder is born and mobile load are designed to two by single main push-towing rope, bear respectively in the recent period, load at a specified future date, avoid implementing in advance rail layer structure, improve resource utilization, under this engineering method, construct, can guarantee not interrupt lower floor's traffic, and can guarantee the current headroom of intermediate deck 4.5m, reduce to greatest extent the impact of construction on middle level traffic, meanwhile, on traversing carriage, carry out rod member assembled, easily guarantee splicing accuracy, be not subject to run the impact of Bridge distortion.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is recent construction operating mode schematic diagram of the present invention;
Fig. 2 is construction operating mode schematic diagram at a specified future date of the present invention;
The suspension bridge sectional drawing of Fig. 3 for having constructed;
Fig. 4 is the structural representation of double-deck truss.
The specific embodiment
Fig. 1 is recent construction operating mode schematic diagram of the present invention; Fig. 2 is construction operating mode schematic diagram at a specified future date of the present invention, the suspension bridge sectional drawing of Fig. 3 for having constructed, the structural representation that Fig. 4 is double-deck truss.As shown in the figure: on chord member in 1 main push-towing rope I, 2 main push-towing rope I suspension rods, 3,4 times web members, 5 lower chords, 6 lower transverse beams, 7 ballasts, 8 middle cross beams, 9 upper chords, 10, web member, 11 main push-towing rope II, 21 main push-towing rope II suspension rods, 12 top rails, track longeron 13,14 move the gusset plate of assembled moulding bed, 15 upper strata truss, 16 reserved joints.The stage construction method of the dual-purpose suspension bridge of the public rail of multilayer deck, described bridge is three layers of bridge floor suspension bridge that double-deck parallel main truss structure forms, track traffic is positioned at the superiors, highway communication is arranged in, lower floor, adopt stage construction method and the track traffic of the track traffic of constructing after first Construction Highway traffic can be in highway communication construction in service, its construction method comprises the following steps:
A. highway communication construction in the recent period:
A1. first construction basis, bridge tower, anchorage:
A2., main push-towing rope I 1 be installed and set up lower floor's main truss beam and remain in advance the later stage and set up the truss web interface that upper strata main truss is set a roof beam in place, then carrying out deck paving and form lower floor's bridge floor and intermediate deck;
A3. deck paving;
Anchorage construction: anchorage relies on gravity to resist tension of main cable, and anchor block is mass concrete construction, need to carry out plane minute storehouse and vertical layered to anchor block according to temperature control scheme, according to certain Construction Plan by stages layering build and maintenance.Note hydro-thermalization impact, prevent that anchor block from producing crack.Anchor block and basis should form integral body.
The construction of tower: bridge tower is generally a type frame construction, adopts creeping formwork method to build tower body concrete, interim strut can be set in the work progress of upper king-post strut and guarantee that tower body structure is stable.Construction period need again Sarasota other install with Sarasota completely independently tower crane carry out transportation, the installation of material.
Main push-towing rope sets up: anchorage, bridge tower engineering complete, main cable saddle and loose cable saddle installation in position, and trailer system just can carry out main push-towing rope and set up work after setting up.The erection method of main push-towing rope mainly contains aerial wire feed method (AS method) and prefabricated strand method (PWS method), is all the method for prior art, repeats no more herein.
Lower floor's main truss erection: suspension bridge steel truss girder constructure scheme has: rod member support is assembled, assembled, the whole section assembling of rod member suspention.Under bridge, in the good situation of navigation condition, conventionally adopt whole section assembling.Trusses rod member is after factory process, and shipping, to precalculated position, is utilized and lifted by crane piecemeal assembled across cable loop wheel machine.
B. track traffic construction at a specified future date:
B1. the main push-towing rope II of constructing setting up on intermediate deck meets the removable operation platform that upper strata trusses set up, and moved, installed location needs;
Specific construction step is: the upper deck of bridge structure of implementing at a specified future date, be not suitable for adopting integral hoisting construction, and can only take the scheme of loose mail transportation spelling, can reduce the requirement of Lifting Capacity.Upper strata main truss rod member adopts loose mail mode to be transported to bridge location king-tower place, assembled piecemeal to main span span centre direction by king-tower.During construction, first on traversing carriage, lay upper layer bridge panel (containing track longitudinal and cross beam), then upper strata chord member is installed, form the deck structrue of single sections.By hoist cable is installed, bridge deck weight is transferred in main push-towing rope II.To span centre reach support, repeat the installation of next sections deck structrue, until whole upper deck of bridge structure construction completes.Thereafter, by apply interim counterweight on upper deck of bridge, the absolute altitude of adjustment main push-towing rope II and upper layer bridge panel, linear, control the distance of upper chord and middle chord member, upper strata trusses web member is progressively installed, upper bridge deck structure is connected into integral body, finally complete intersegmental bridge floor attachment weld, form whole upper strata trusses.
B2. carry out that upper deck of bridge is mated formation and track construction.
In the present embodiment, double-deck main truss structure comprise with 12 upper chords that are connected 9 on track cross beam and with track in lower transverse beam (8,6) the middle chord member 3 and the lower chord 5 that connect respectively, be cross-linked to form by web member (10,14) node being positioned on chord member between chord member.
Finally explanation is, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement technical scheme of the present invention, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of claim scope of the present invention.
Claims (4)
1. the stage construction method of the dual-purpose suspension bridge of the public rail of a multilayer deck, it is characterized in that: described suspension bridge is three layers of bridge floor suspension bridge that double-deck parallel main truss structure forms, track traffic is positioned at the superiors, highway communication is arranged in, lower floor, adopt stage construction method and the track traffic of the track traffic of constructing after first Construction Highway traffic can be in highway communication construction in service, its construction method comprises the following steps:
A. highway communication construction in the recent period:
A1. first construction basis, bridge tower, anchorage;
A2., main push-towing rope I be installed and set up lower floor's main truss beam and remain in advance the later stage and set up the truss web interface that upper strata main truss is set a roof beam in place, then carrying out deck paving and form lower floor's bridge floor and intermediate deck;
A3. deck paving;
B. track traffic construction at a specified future date:
B1. the main push-towing rope II of constructing setting up on intermediate deck meets the removable operation platform that upper strata trusses set up, and moved, installed location needs, and on operation platform, install and comprise the track upper layer bridge panel of beam in length and breadth, and main truss upper chord, interior side sling is installed;
B2. by the reserved jiont treatment of lower floor's main truss upper strata main truss soffit of girder bar;
B3. carry out that upper deck of bridge is mated formation and track construction.
2. the stage construction method of the dual-purpose suspension bridge of the public rail of multilayer deck according to claim 1, is characterized in that: in step b1, employing mode of assembly on portable assembling support is set up upper strata main truss and set a roof beam in place.
3. the stage construction method of the dual-purpose suspension bridge of the public rail of multilayer deck according to claim 2, is characterized in that: lower floor's main truss beam adopts the mode of sections whole Transporting, lifting to set up, and after elder generation is hinged, rigidly connects, and forms recent structure; Upper strata main truss rod member adopts loose mail mode to be transported to bridge location king-tower place, assembled piecemeal to main span span centre direction by king-tower; First construction comprises the upper layer bridge panel of track longitudinal and cross beam, the upper strata chord member of then constructing, finally side sling in construction; All, after the installation of upper layer bridge panel, interim counterweight is installed on upper layer bridge panel, adjusts the linear of main push-towing rope II, section is installed upper strata main truss web member section by section, removes interim counterweight, and between welding sections, bridge deck seam forms whole upper strata trusses.
4. the stage construction method of the dual-purpose suspension bridge of the public rail of multilayer deck according to claim 3, it is characterized in that: described double-deck main truss structure comprises and the upper chord being connected with track cross beam and the middle chord member and the lower chord that are connected respectively with track lower and upper cross-member by web member, is cross-linked to form the node being positioned on chord member between chord member.
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| CN201410316828.8A CN104195946B (en) | 2014-07-04 | 2014-07-04 | The time phasing method of the dual-purpose suspension bridge of multilayer deck public affairs rail |
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| CN201410316828.8A CN104195946B (en) | 2014-07-04 | 2014-07-04 | The time phasing method of the dual-purpose suspension bridge of multilayer deck public affairs rail |
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Cited By (7)
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| CN106988201A (en) * | 2017-03-16 | 2017-07-28 | 中铁大桥勘测设计院集团有限公司 | A kind of double deck girder of suspension bridge structure |
| CN108103947A (en) * | 2017-12-21 | 2018-06-01 | 芜湖铁路桥梁制造有限公司 | The construction method of three layers of bridge |
| CN109112961A (en) * | 2018-10-30 | 2019-01-01 | 长沙学院 | A kind of construction method of ultra-thin bridge deck structure, truss-type bridges and truss-type bridges |
| CN110241974A (en) * | 2019-04-29 | 2019-09-17 | 深圳市建筑设计研究总院有限公司 | Complete bolted truss-like girder with rolled steel section en cased in concrete and construction method |
| CN111424561A (en) * | 2020-05-07 | 2020-07-17 | 西南交通大学 | Layered suspension structure of single-side double-main-cable steel truss stiffening beam suspension bridge |
| CN111535185A (en) * | 2020-04-30 | 2020-08-14 | 中交二公局第二工程有限公司 | Method for installing plate girder combination beam of suspension bridge |
| CN112921813A (en) * | 2021-01-25 | 2021-06-08 | 中建科工集团有限公司 | Double-layer multi-span bridge construction method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106988201A (en) * | 2017-03-16 | 2017-07-28 | 中铁大桥勘测设计院集团有限公司 | A kind of double deck girder of suspension bridge structure |
| CN108103947A (en) * | 2017-12-21 | 2018-06-01 | 芜湖铁路桥梁制造有限公司 | The construction method of three layers of bridge |
| CN109112961A (en) * | 2018-10-30 | 2019-01-01 | 长沙学院 | A kind of construction method of ultra-thin bridge deck structure, truss-type bridges and truss-type bridges |
| CN110241974A (en) * | 2019-04-29 | 2019-09-17 | 深圳市建筑设计研究总院有限公司 | Complete bolted truss-like girder with rolled steel section en cased in concrete and construction method |
| CN110241974B (en) * | 2019-04-29 | 2023-11-17 | 深圳市建筑设计研究总院有限公司 | Full-bolt-connection truss type steel reinforced concrete beam and construction method |
| CN111535185A (en) * | 2020-04-30 | 2020-08-14 | 中交二公局第二工程有限公司 | Method for installing plate girder combination beam of suspension bridge |
| CN111424561A (en) * | 2020-05-07 | 2020-07-17 | 西南交通大学 | Layered suspension structure of single-side double-main-cable steel truss stiffening beam suspension bridge |
| CN112921813A (en) * | 2021-01-25 | 2021-06-08 | 中建科工集团有限公司 | Double-layer multi-span bridge construction method |
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