CN1580413A - Ground-support-free continous rigid frame bridge sidespan closure method - Google Patents
Ground-support-free continous rigid frame bridge sidespan closure method Download PDFInfo
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- CN1580413A CN1580413A CN 03153222 CN03153222A CN1580413A CN 1580413 A CN1580413 A CN 1580413A CN 03153222 CN03153222 CN 03153222 CN 03153222 A CN03153222 A CN 03153222A CN 1580413 A CN1580413 A CN 1580413A
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Abstract
This invention relates to a side span closure method for a continuous rigid bridge without down-to-the-ground frames including selecting a ratio of side span/middle span in the sphere of 0.54-0.56, laying out and designing sections in terms of the river course hydrogeological condition, designing and analyzing it to select suitable sections to arrange ordinary steel bars and prestressed bars and drafting a construction pattern, symmetrically casting in terms of each T, selecting one way to finish side span closure: A the side span site-cast handing basket is extended and moves forward, the other end is supported on a side pier, utilizing the suspending arm and the side pier to bear the basket to site cast the closure section, B removing the basket and matching the truss beam on the beam and side pier an hanging forms.
Description
Technical field
The present invention relates to a kind of construction method of bridge, refer in particular to the method that a kind of continuous rigid frame bridge end bay of non-floor-bracket closes up.
Background technology
The continuous rigid frame bridge of in the past building, closing up of end bay all takes the cast-in-place method of proping to carry out basically.In general, end bay with in stride that ratio adopts as 0.6～0.67, make that the cast-in-place segment length of end bay is bigger, often reach as 22m, have to build with the console mode full framing.In work progress, this technology difficulty is big, particularly under high pier situation, takes the material effort.This support (as framed bent) also has basis in the reluctant water in water, in the big area of wind, also have the wind stability problem.Except that cost is big, on the navigation channel of navigation or all can't allow on the river course that drains off floodwaters.
Sometimes in order to eliminate this support, access bridge is adopted continuous beam, hang,, join, realize closing up with the cantilever of firm structure end bay as 15～20m with incremental launching method.The scope of application of this method is subjected to certain limitation, as: when the one or both sides of continuous rigid frame access bridge is not had the incremental launching construction condition, when perhaps the both sides access bridge is selected system of simple supporting for use, all can't avoid support cast-in-place to close up the end bay section.
After selecting continuous rigid frame for use, in stride and all can utilize Dun Ding to the both sides cantilever, realize that no supporting row frame closes up, but because of the past design select for use end bay with in stride than 0.60～0.67: 1 ratio, make the end bay closure segment long, cause support to close up.
As a bridge, main bridge total length 1060m, that is: 162.5+245+245+245+162.5m, end bay: in stride=0.663: 1, after 4 T finished, middle 245m strode to close up and is easier to, and each end bay also has 41 meters sections will build concrete.For this reason, have to do the basis under water, the framed bent of the upright wide 15m of the high 40m of long 41m of frame more thereon, shuttering on it waters the end bay closure segment, as Fig. 2.This scheme all has to pay a high price aspect cost and duration.Thus, the advantage of cantilever construction in the constructure scheme is in the past given by the cast-in-place method of end bay and have been beaten very big discount.
Summary of the invention
Continuous rigid frame bridge is generally built at deep water rivers and deep valley, perhaps for to have relatively high expectations (80～300m), required when building viaduct at span ability.For avoiding in deep water, deep valley, perhaps set up high framed bent in the urban viaduct.
The method that the object of the present invention is to provide a kind of continuous rigid frame bridge end bay of non-floor-bracket to close up is to address the above problem.When the continuous rigid frame limit/in the minimum ratio of striding when being 0.54～0.56, still remain with enough normal pressures on the abutment pier bearing and negative pressure do not occur, yet do not close up and increase prestressed cable simultaneously because end bay has support.
So, to main span less than with the continuous rigid frame main span that equals 120m, the cast-in-place segment length of end bay will be not more than 7.0m, can build cast-in-place section of end bay with hanging to push away before the basket during construction; To striding the main span of footpath at 120～270m, the cast-in-place segment length of end bay is not more than 7～16m, can be with the nose girder method section of watering, as Figure 1A and Figure 1B during construction.This kind scheme is feasible in design, and construction is convenient.
Description of drawings
Figure 1A is main span cast-in-place section scheme schematic diagram of end bay during smaller or equal to 120m;
Figure 1B is main span cast-in-place section scheme schematic diagram of end bay during smaller or equal to 270m;
Fig. 2 is a schematic diagram of selecting the known schemes of continuous rigid frame for use, end bay/in the value of striding be 0.663, between 0.60～0.67.
The specific embodiment
Embodiment 1
As Figure 1A, the former continuous rigid frame bridge that is designed to 65+2 * 100+65m, adopting end bay to take floor stand closes up, now change 59+2 * 106+59m into, end bay/in the ratio of striding be 0.557, belonging to described abutment pier does not have the end bay of negative reaction/in stride the scope of minimum ratio 0.54～0.56, end bay closes up segment length 7m, can realize with hanging the blue cast-in-place end bay that closes up.The steps include:
Select end bay/in to stride ratio be 0.557, stride according to hydraulic condition of river geological conditions cloth, and draft section;
Adopt ripe routine analyzer to design and analyze, when satisfying the end bay fulcrum the desired fulcrum positive reaction of the technical specification of satisfying is all arranged, select the section that is fit under any load;
Arrange plain bars and presstressed reinforcing steel according to internal force envelope and relevant specification, draw working drawing;
In construction, press the cantilever of every T symmetry;
The mode that end bay closes up, one of optional usefulness is following, and wherein A is best:
A. blue lengthening of the cast-in-place extension of end bay and reach are supported on the abutment pier (or limit abutment) other end, utilize cantilever end and abutment pier to prop up support indigo plant, cast-in-place end bay closure segment;
B. remove and hang bluely, utilize steel structure assembling to be supported in girder truss on cantilever end and the abutment pier, following extension template, the realization end bay closes up.
Embodiment 2
As Figure 1B, design end bay be 150m, in stride the bridge of 270m, its end bay/in to stride ratio be 0.556, belonging to described abutment pier does not have the end bay of negative reaction/in stride in the scope of minimum ratio 0.54～0.56.So, adopt the end bay closure segment of the cast-in-place 16m of nose girder after, though mobile load cloth in any position, the abutment pier fulcrum all negative reaction do not occur but also remains with the pressure of certain deposit; When cantilever applies 1/2 nose girder and cast-in-place section deadweight of 16m, make construction need not additionally join rope, thereby adopt the nose girder method to build the cast-in-place section case beam of end bay 16m relievedly.Only when the full framing foundation construction has been finished, just adopt cast-in-place closing up on the full framing, as: 14m is cast-in-place in the support segmentation, and closure segment 2m closes up on support.The steps include:
Select end bay/in to stride ratio be 0.556, stride according to hydraulic condition of river geological conditions cloth, and draft section;
Adopt ripe routine analyzer to design and analyze, when satisfying the end bay fulcrum the desired fulcrum positive reaction of the technical specification of satisfying is all arranged, select the section that is fit under any load;
Arrange plain bars and presstressed reinforcing steel according to internal force envelope and relevant specification, draw working drawing;
In construction, press the cantilever of every T symmetry;
The mode that end bay closes up, one of optional usefulness is following, and wherein B is best:
A. blue lengthening of the cast-in-place extension of end bay and reach are supported on the abutment pier (or limit abutment) other end, utilize cantilever end and abutment pier to prop up support indigo plant, cast-in-place end bay closure segment;
B. remove and hang bluely, utilize steel structure assembling to be supported in girder truss on cantilever end and the abutment pier, following extension template, the realization end bay closes up.
Claims (3)
1. the continuous rigid frame bridge end bay of the non-floor-bracket method of closing up the steps include:
Select an end bay/in stride ratio, stride according to hydraulic condition of river geological conditions cloth, and draft section;
Design and the section of analysis to select to be fit to;
Arrange plain bars and presstressed reinforcing steel, draw working drawing;
In construction, press the cantilever of every T symmetry;
End bay closes up, and one of optional usefulness is following:
A. blue lengthening of the cast-in-place extension of end bay and reach are supported on the abutment pier (or limit abutment) other end, utilize cantilever end and abutment pier to prop up support indigo plant, cast-in-place end bay closure segment;
B. remove and hang bluely, utilize steel structure assembling to be supported in girder truss on cantilever end and the abutment pier, following extension template, the realization end bay closes up.
2. the continuous rigid frame bridge end bay of the non-floor-bracket as claimed in claim 1 method of closing up is characterized in that: end bay/in to stride ratio be 0.54～0.56.
3. the method for closing up as the continuous rigid frame bridge end bay of the non-floor-bracket of claim 1 or 2 is characterized in that:
Described suitable section should meet: the end bay fulcrum all has desirable fulcrum positive reaction under any load.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 03153222 CN1580413A (en) | 2003-08-08 | 2003-08-08 | Ground-support-free continous rigid frame bridge sidespan closure method |
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| CN 03153222 CN1580413A (en) | 2003-08-08 | 2003-08-08 | Ground-support-free continous rigid frame bridge sidespan closure method |
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Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101660296B (en) * | 2009-09-08 | 2011-01-26 | 中铁九局集团有限公司 | Method for casting concrete 0# block support by continuous beam cantilever |
| CN101492966B (en) * | 2008-01-24 | 2011-06-29 | 中建三局建设工程股份有限公司 | Construction method of super large steel structure cantalever |
| CN101469534B (en) * | 2007-12-28 | 2011-09-28 | 上海市基础工程有限公司 | Pier top load bearing bracket construction technique |
| CN102425117A (en) * | 2011-12-26 | 2012-04-25 | 中铁大桥局股份有限公司 | Construction method for non-cantilever sections of sidespans of multiplex continuous beam or steel-constructed beam |
| CN103556578A (en) * | 2013-10-14 | 2014-02-05 | 中铁十九局集团有限公司 | Casting mold system for straight line section and side span closure section of continuous beam and building method thereof |
| CN103572708A (en) * | 2013-10-29 | 2014-02-12 | 西南交通大学 | Large-span concrete continuous girder bridge side span folding device and method |
| CN104047234A (en) * | 2014-04-02 | 2014-09-17 | 中铁二院工程集团有限责任公司 | Self load bearing side span closure construction method for corrugated steel web plate continuous rigid frame bridge |
| CN104074145A (en) * | 2014-06-30 | 2014-10-01 | 广东省基础工程公司 | Closure-section refit construction method for hanging basket |
| CN104631342A (en) * | 2015-02-15 | 2015-05-20 | 中铁大桥局集团第五工程有限公司 | Device and method for closure construction of girder side span of cable-stayed bridge |
| CN104790302A (en) * | 2015-05-08 | 2015-07-22 | 中南林业科技大学 | Hanging-basket and bent-cap-support matched integral construction method for side span linear segment of high-pier continuous rigid frame bridge |
| CN106522102A (en) * | 2016-11-22 | 2017-03-22 | 中交公局海威工程建设有限公司 | Side span construction support, rigid frame bridge side span and rigid frame bridge |
| CN106758871A (en) * | 2017-02-20 | 2017-05-31 | 湖南科技大学 | A kind of full cantilever construction prestressed concrete continuous rigid-framed bridge and its construction method |
| CN106835926A (en) * | 2017-02-20 | 2017-06-13 | 湖南科技大学 | A kind of small side main span is than prestressed concrete continuous beam and its construction method |
| CN106906733A (en) * | 2017-02-20 | 2017-06-30 | 湖南科技大学 | One kind is without the small side main span of end bay closure section than continuous rigid frame bridge and its construction method |
| CN108532437A (en) * | 2018-05-21 | 2018-09-14 | 长江勘测规划设计研究有限责任公司 | The arrangement and design method of prestressing force beam body after a kind of beam body increases |
| CN110939075A (en) * | 2019-11-12 | 2020-03-31 | 中国铁建大桥工程局集团有限公司 | Combined cast-in-place construction method for straight section support and hanging basket on side of equal-span continuous beam |
| CN111893889A (en) * | 2020-07-15 | 2020-11-06 | 杭州市市政工程集团有限公司 | Main bridge closure section construction method |
-
2003
- 2003-08-08 CN CN 03153222 patent/CN1580413A/en active Pending
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101469534B (en) * | 2007-12-28 | 2011-09-28 | 上海市基础工程有限公司 | Pier top load bearing bracket construction technique |
| CN101492966B (en) * | 2008-01-24 | 2011-06-29 | 中建三局建设工程股份有限公司 | Construction method of super large steel structure cantalever |
| CN101660296B (en) * | 2009-09-08 | 2011-01-26 | 中铁九局集团有限公司 | Method for casting concrete 0# block support by continuous beam cantilever |
| CN102425117A (en) * | 2011-12-26 | 2012-04-25 | 中铁大桥局股份有限公司 | Construction method for non-cantilever sections of sidespans of multiplex continuous beam or steel-constructed beam |
| CN103556578B (en) * | 2013-10-14 | 2015-05-13 | 中铁十九局集团有限公司 | Casting mold system for straight line section and side span closure section of continuous beam and building method thereof |
| CN103556578A (en) * | 2013-10-14 | 2014-02-05 | 中铁十九局集团有限公司 | Casting mold system for straight line section and side span closure section of continuous beam and building method thereof |
| CN103572708B (en) * | 2013-10-29 | 2015-06-03 | 西南交通大学 | Large-span concrete continuous girder bridge side span folding device and method |
| CN103572708A (en) * | 2013-10-29 | 2014-02-12 | 西南交通大学 | Large-span concrete continuous girder bridge side span folding device and method |
| CN104047234A (en) * | 2014-04-02 | 2014-09-17 | 中铁二院工程集团有限责任公司 | Self load bearing side span closure construction method for corrugated steel web plate continuous rigid frame bridge |
| CN104047234B (en) * | 2014-04-02 | 2016-05-11 | 中铁二院工程集团有限责任公司 | Wavelike steel webplate continuous rigid frame bridge self-supporting end bay closure construction method |
| CN104074145A (en) * | 2014-06-30 | 2014-10-01 | 广东省基础工程公司 | Closure-section refit construction method for hanging basket |
| CN104631342A (en) * | 2015-02-15 | 2015-05-20 | 中铁大桥局集团第五工程有限公司 | Device and method for closure construction of girder side span of cable-stayed bridge |
| CN104790302A (en) * | 2015-05-08 | 2015-07-22 | 中南林业科技大学 | Hanging-basket and bent-cap-support matched integral construction method for side span linear segment of high-pier continuous rigid frame bridge |
| CN106522102A (en) * | 2016-11-22 | 2017-03-22 | 中交公局海威工程建设有限公司 | Side span construction support, rigid frame bridge side span and rigid frame bridge |
| CN106758871A (en) * | 2017-02-20 | 2017-05-31 | 湖南科技大学 | A kind of full cantilever construction prestressed concrete continuous rigid-framed bridge and its construction method |
| CN106835926A (en) * | 2017-02-20 | 2017-06-13 | 湖南科技大学 | A kind of small side main span is than prestressed concrete continuous beam and its construction method |
| CN106906733A (en) * | 2017-02-20 | 2017-06-30 | 湖南科技大学 | One kind is without the small side main span of end bay closure section than continuous rigid frame bridge and its construction method |
| CN108532437A (en) * | 2018-05-21 | 2018-09-14 | 长江勘测规划设计研究有限责任公司 | The arrangement and design method of prestressing force beam body after a kind of beam body increases |
| CN110939075A (en) * | 2019-11-12 | 2020-03-31 | 中国铁建大桥工程局集团有限公司 | Combined cast-in-place construction method for straight section support and hanging basket on side of equal-span continuous beam |
| CN110939075B (en) * | 2019-11-12 | 2021-09-17 | 中国铁建大桥工程局集团有限公司 | Combined cast-in-place construction method for straight section support and hanging basket on side of equal-span continuous beam |
| CN111893889A (en) * | 2020-07-15 | 2020-11-06 | 杭州市市政工程集团有限公司 | Main bridge closure section construction method |
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