CN201648978U - Tied arch support of bridge location cast-in-situ prestressed concrete continuous beam - Google Patents
Tied arch support of bridge location cast-in-situ prestressed concrete continuous beam Download PDFInfo
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- CN201648978U CN201648978U CN201020177194XU CN201020177194U CN201648978U CN 201648978 U CN201648978 U CN 201648978U CN 201020177194X U CN201020177194X U CN 201020177194XU CN 201020177194 U CN201020177194 U CN 201020177194U CN 201648978 U CN201648978 U CN 201648978U
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Abstract
The utility model belongs to the technical field of prestressed concrete continuous beam construction in bridge engineering, in particular to a tied arch support of a bridge location cast-in-situ prestressed concrete continuous beam, which solves the problems that an existing construction can not meet construction period requirements, has severe requirement for bearing capacity of foundation soil and operating space, and has large workload and does not economic and the like. The tied arch support of the bridge location cast-in-situ prestressed concrete continuous beam comprises a tied arch support and vertical support structures, wherein the tied arch support is arranged on the lower portion of the concrete continuous beam, the vertical support structures are arranged on the lower portions of the two end heads of the concrete continuous beam, the tied arch support comprises an arch portion and an arch rod which connects the two ends of the arch portion, a connecting position of the arch portion and the arch rod is articulated, and the bottom portion of the arch rod is provided with a support. The tied arch support of the bridge location cast-in-situ prestressed concrete continuous beam has the beneficial effects that the construction period is saved, the adaptation range is wide, and the cost is saved. The tied arch support of the bridge location cast-in-situ prestressed concrete continuous beam can fully use a bridge pier bearing table and a lower pile foundation thereof as a lower bearing structure, does not reinforce a foundation, and can meet cast-in-situ construction of the concrete continuous beam under special external environment of having bridges and the like.
Description
Technical field
The utility model belongs to the technical field of prestressed concrete continuous beam construction in the bridge engineering, is specifically related to a kind of tied arch support of bridge location cast-in-situ prestressed concrete continuous beam.
Background technology
Construction at the prestressed concrete continuous beam bridge, according to supporting type difference, the normal job practices that adopts has five kinds: one, Hanging Basket cantilever placing job practices: adopt the operation of segmentation cantilever, do not need elongated erection bracket, have light in structure, piece together advantages such as making simple and convenient and wide accommodation,, take all factors into consideration greater than the construction of the concrete continuous beam of 100m for span, have tangible advantage at aspects such as safety, energy-conservation, durations; Two, full framing placing job practices: scaffold type commonly used has bowl fastening type, fastener type, this method material turnover utilization rate height, the supporting structure flexible design, can realize constructing safely and fast, often be applied to the concrete continuous beam of span, and construction plant foundation bearing capacity, foundation settlement distortion and working space need satisfy construction requirement less than 60m; Three, buttress cribbing placing job practices: utilize buttress as vertical load-carrying construction cast-in-situ concrete continuous beam, this method structure stress is clear and definite, enabling capabilities is big, can reserve conventional external procedure space, wide accommodation, still, in the zone of place geological conditions difference, need be to ground base enforcement, uneconomical, long in time limit; Four, comprehensive utilization full framing and buttress cribbing cast-in-situ concrete continuous beam: under the condition tight in the duration restriction, that site condition allows, can be applicable to the Construction of continuous beam that span reaches 100m; Five, erection by protrusion: utilize portable cantilever loop wheel machine or traversing carriage that the precast beam section is risen and winch to bridge location, adopt epoxy resin and steel tendon to apply prestressing force then and be connected into integral body, adopt assembly unit piecemeal, general sections length 2～5m, generally be applicable to the engineering that construction period is tight, but linear control difficulty.Therefore, under the not good situation of the comprehensive technology that adopts cradle construction and economic benefit, especially the node duration of a project require tight, when site condition is limited, the bridge location support cast-in-place is a kind of method of indispensability.At present, if Construction of continuous beam possesses tight, the bad condition of place geological conditions of duration simultaneously, so, adopt above-mentioned support method cast-in-place, exist rolled steel dosage many, need reinforce specially the place foundation, problem such as the steel of early investment possibly can't reclaim.
The utility model content
The utility model can't satisfy construction period, full framing placing construction bearing capacity of foundation soil and working space are had problems such as strict demand, buttress cribbing placing construction ground stabilization workload are big and uneconomical in order to solve existing Hanging Basket cantilever placing construction, provide a kind of can the realization to construct safely and fast, can save the tied arch support of the bridge location cast-in-situ prestressed concrete continuous beam of engineering cost and wide accommodation again.
The utility model adopts following technical scheme to realize:
The tied arch strutting system of bridge location cast-in-situ prestressed concrete continuous beam, it is characterized in that it comprises under the concrete continuous beam the vertical braced structures that is provided with under the two ends of the tied arch support that is provided with and concrete continuous beam, set gradually column, crossbeam, longeron, transverse distribution beam and template system between tied arch support and the concrete continuous beam from bottom to top, described tied arch support comprises arch and the tie-rod that is connected the arch two ends, the junction of arch and tie-rod is hinged, and support is established in the tie-rod bottom.
Tied arch is the horizontal-less thrust arch, and the horizontal thrust of arch abutment is born by tie-rod, and the bearing of arch abutment is not subjected to horizontal thrust, and tie-rod is rigidity or flexibility, and this structure often is applied in the bridge construction design, as bowstring arch bridge.The utility model at first utilizes the structural principle of tied arch, and promptly abut and tie-rod junction are hinged, and bears the horizontal force of arch by tie-rod, and tied arch can be to bridge construction pier or cushion cap produce horizontal thrust.Build the tied arch support in the bottom of beam body, and vertical braced structures is set at the termination of beam body next-door neighbour's bridge pier and tied arch, replace the effect of bridge pier in the Deck Arch Bridges structure with this, then, above the tied arch support, linear according to continuous beam built the template system of cast-in-place beam body and function, at last, finish the construction of prestressed concrete continuous beam according to reasonably building order and closure scheme.Concrete operations are as follows:
(1) tied arch abut absolute altitude is adjusted
Whether observation beam body two ends pier cap is at same horizontal absolute altitude, if absolute altitude is inconsistent, on the low cushion cap of absolute altitude, build concrete buttress, make its absolute altitude unanimity, also can be according to the external environment condition requirement, by on cushion cap, building concrete buttress absolute altitude reasonable in design.
(2) tied arch arch job platform foundation construction
Span centre at the beam body, support to arranging at vertical bridge by certain spacing, according to geological conditions in the place, support can be pile foundation or steel concrete bar shaped, enlarge the basis, mainly be in order to reduce the span of tied arch tie-rod, as the basis of tied arch arch job platform, guarantee that intensity, rigidity and the stability of tie-rod under the effect of construction temporary load(ing) meets the demands.
(3) the vertical braced structures in tie-rod and concrete continuous beam termination is installed
On the cushion cap of horizontal absolute altitude unanimity, tie-rod is installed, tie-rod is at the distributed quantity of direction across bridge, according to getting of beam body from heavy load and working load, hinge is established in the tie-rod termination, tie-rod and job platform basis, tied arch arch are only vertically providing constraint by crossbeam, construct the simultaneously vertical braced structures of beam body termination, this structure diameter commonly used be greater than steel pipe or the shellfish thunder sheet of 350mmm, the stress and the distortion of vertical braced structures can reduce concrete continuous beam when building tied arch upper mould support.
(4) tied arch rack construction
Arch according to the linear and prefabricated tied arch of steel specifications and models that designs behind prefabricated the finishing, lifts to the job platform of tied arch arch one by one, joins the two sections of a bridge, etc by the draw-gear vertical transfer.Or on the job platform of tied arch arch, set up support, and process arch according to design is linear with the steel specifications and models at the scene, every root system pole pair is answered an arch, and arch is hinged with the tie-rod junction, and the space that the tie-rod axial tension is out of shape vertically will reserved in the abut position.
(5) tied arch upper bracket and template system construction
At tied arch support top construction column, column top mark height is high with the vertical braced structures top mark of concrete continuous beam termination consistent, column position and quantity trying to achieve from heavy load and working load according to concrete continuous beam be set, on column and vertical braced structures, crossbeam is set, Bei Leiliang is installed as longeron in crossbeam top, the transverse distribution beam is installed on longeron top, on transverse distribution beam top, according to the linear type construction formwork system of concrete continuous beam.
(6) concrete pouring construction
No. 0 section (No. 0 segment length can be chosen according to actual conditions) of elder generation's concreting continuous beam, interlude build order by " by the middle part to both sides ", and choose the closure section of 1 sections respectively in both sides as the beam body, after treating that continuous beam is finished common process such as prestressed stretch-draw, build the construction that the closure section is finished concrete continuous beam.The concrete casting building technology is consistent with common process, comprises concrete stirring, transportation, pumping, vibrates and maintenance etc.
The utlity model has following beneficial effect: compare with the outstanding filling construction of Hanging Basket, save about 60 days of duration; Compare wide accommodation, saving cost with the cast-in-place method of conventional bracket; Can make full use of pier cap and its underpart pile foundation as the bottom bearing structure, need not ground stabilization; Can satisfy the cast-in-place construction of concrete continuous beam under the special external environment such as striding existing bridge.
Description of drawings
Fig. 1 is an elevation of the present utility model
Fig. 2 is the A-A side view of Fig. 1
The schematic diagram (direction of arrow is for building direction) that Fig. 3 builds for No. 0 section of the first step that concrete continuous beam is built
The schematic diagram (direction of arrow is for building direction) that Fig. 4 builds for the second step interlude that concrete continuous beam is built
The schematic diagram that Fig. 5 builds for the 3rd step closure section that concrete continuous beam is built
Among the figure: 1-cushion cap, 2-bridge pier, 3-concrete continuous beam, 4-abut, the 5-tie-rod, the vertical braced structures of 6-, 7-column, the 8-crossbeam, 9-longeron, 10-bed die transverse distribution beam, the vertical distribution beam of 11-bed die, 12-job platform pile foundation, 13-is hinged, 14-tied arch closure section, 15-0 section, 16-interlude, 17-concrete continuous beam closure section, 18-transverse distribution beam, 19-steel pipe support.
The specific embodiment
In conjunction with the accompanying drawings the specific embodiment of the present utility model is described further.
The tied arch strutting system of bridge location cast-in-situ prestressed concrete continuous beam, it is characterized in that the vertical braced structures 6 that is provided with under the two ends of tied arch support that it comprises that concrete continuous beam 3 times is provided with and concrete continuous beam 3, set gradually column 7 from bottom to top between tied arch support and the concrete continuous beam 3, crossbeam 8, longeron 9, transverse distribution beam 18 and template system, (template system comprises steel pipe support, bed die transverse distribution beam, vertical distribution beam of bed die and template), described tied arch support comprises arch 4 and the tie-rod 5 that is connected arch 4 two ends, the junction of arch 4 and tie-rod 5 is hinged 13, and support is established in tie-rod 5 bottoms.
The utility model is an example to stride the construction of 56m variable cross-section concrete continuous beam in certain continuous beam:
(1) tied arch bracket support system
Determine the primary structure of tied arch bracket support system: the concrete grade of the buttress of the horizontal absolute altitude of adjustment tie-rod is consistent with the pier cap concrete grade, according to the cushion cap size reasonable buttress size is set; Tie-rod is a Two bors d's oeuveres 50b i iron, and arch is the shaped steel of two kinds of different size models, is Two bors d's oeuveres 56b i iron near column, and other position is a Two bors d's oeuveres 36b i iron, and tied arch is at horizontally set 13 Pin; Box type column adopts the steel pipe of Φ 529*10mm on the tied arch, and the vertical braced structures of concrete continuous beam termination is the steel pipe of Φ 400*10mm; The longeron (shellfish thunder sheet) of tied arch top is horizontally set 17 rows, and spacing is pressed the sectional dimension of concrete continuous beam and determined.Reliable for guaranteeing structural safety, said structure to be carried out theory calculate, result of calculation is as follows:
1. structural parameters and computation model
The structural parameters table
| Member | The material model | Area (cm 2) | Moment of inertia (cm 4) |
| |
Q235，2I56b | 293.16 | ?137014 |
| Arch 2 | Q235，2I36b | 167.27 | ?33147 |
| Tie-rod | Q235，2I50b | 258.49 | ?97113 |
| Column | Q235，φ529*10mm | 163.049 | 54865.383 |
| Longeron | Shellfish thunder sheet | 40.96 | 206954 |
2. result of calculation
The result of calculation table
| Member | Maximum stress value (MPa) | Distortion (cm) |
| Arch | ?107＜170 | Arch springing horizontal movement 0.5 arch center vertical displacement 1.3 |
| Tie-rod | ?36＜170 | - |
| Column | ?17＜170 | - |
| Longeron | ?150＜190 | 2.7 |
(2) concrete continuous beam is built order
By two kinds of schemes---the contrast at " by the middle part to both sides ", " by two side direction middle part ", selected first kind, that is: first concreting continuous beam No. 0 section (No. 0 segment length can be chosen according to actual conditions), other section build order by " by the middle part to both sides ", and choose the closure section of 1 sections respectively as the beam body in both sides.
" by the middle part to both sides " result of calculation table
| Build sections | Longeron stress (MPa) | Longeron distortion (cm) | Arch thrust (MPa) | Arch distortion (cm) | Tie-rod stress (MPa) |
| 0+2+3+4+5+6 | -87 | 1.8 | -102 | 1.9 | 33 |
| 0+1+2+3+4+5+6 | -150 | 2.7 | -107 | 2.3 | 36 |
" by two side direction middle part " result of calculation table
| Build sections | Longeron stress (MPa) | Longeron distortion (cm) | Arch thrust (MPa) | Arch distortion (cm) | Tie-rod stress (MPa) |
| 0 | -92 | 1.3 | -39 | 1.0 | 11 |
| 0+1 | -153 | 2.2 | -64 | 1.7 | 14 |
| 0+1+2 | -179 | 3.0 | -89 | 2.4 | 18 |
| 0+1+2+3 | -183 | 3.3 | -105 | 2.7 | 23 |
| 0+1+2+3+4 | -173 | 3.2 | -109 | 2.6 | 29 |
| 0+1+2+3+4+5 | -158 | 2.9 | -108 | 2.4 | 34 |
| 0+1+2+3+4+5+6 | -150 | 2.7 | -107 | 2.3 | 36 |
(3) concrete construction technological process
1. tied arch abut absolute altitude is adjusted
Concrete continuous beam two ends pier cap is built concrete buttress not at same horizontal absolute altitude on the low cushion cap of absolute altitude, make its absolute altitude unanimity.
2. tied arch arch job platform foundation construction
Because the span centre place is arranged in the river, geological conditions is poor, therefore, at the span centre of concrete continuous beam, is arranging that vertically vertical steel pipe supports, horizontally set 4 rows by the spacing of maximum 12.5m.
3. the vertical braced structures in tie-rod and concrete continuous beam termination is installed
On the cushion cap of horizontal absolute altitude unanimity, tie-rod is installed, tie-rod is laterally being established 13 Pin, hinge is established in the tie-rod termination, and tie-rod and job platform basis, tied arch arch are only vertically providing constraint by crossbeam, and the vertical steel pipe of the concrete continuous beam termination of constructing simultaneously (Φ 400*10mm) supports.
4. tied arch rack construction
Arch according to the linear and prefabricated tied arch of steel specifications and models that designs, behind prefabricated the finishing, lift one by one to the job platform of tied arch arch, join the two sections of a bridge, etc by the draw-gear vertical transfer, every root system pole pair is answered an arch, arch is hinged with the tie-rod junction, and the abut position is in the space (single-ended reservation is greater than 5cm) that vertically will reserve the distortion of tie-rod axial tension.
5. tied arch upper bracket and template system construction
At tied arch support top construction column, the high vertical steel pipe support top mark with the concrete continuous beam termination of column top mark is high consistent, the column spacing is 3m and 9m, on column and vertical braced structures crossbeam is set, Bei Leiliang is installed as longeron in crossbeam top, and longeron is established 17 rows, the transverse distribution beam is installed on longeron top, in transverse distribution beam top construction formwork system, because the beam body is parabola shaped, template system comprises steel pipe support, the vertical distribution beam of bed die, bed die transverse distribution beam and beam phantom plate.
6. concrete pouring construction
No. 0 section of elder generation's concreting continuous beam, No. 0 segment length 16m, other section (1～6) build order by " by the middle part to both sides ", and choose No. 1 section closure section respectively in both sides as the beam body, after treating that continuous beam is finished common process such as prestressed stretch-draw, build the construction that the closure section is finished concrete continuous beam.The concrete casting building technology is consistent with common process, comprises concrete stirring, transportation, pumping, vibrates and maintenance etc.
(4) adopt the effect of the utility model: 1. compare, save about 50 days of duration with the outstanding filling construction of Hanging Basket to construction; 2. compare with the cast-in-place method of steel pipe support, be adapted to the bad place of geological conditions, and save about 3,000,000 yuan of ground stabilization expense; 3. compare with the conventional bracket method, made full use of pier cap and its underpart pile foundation, need not, save about 10 days of duration ground stabilization as the bottom bearing structure.
Claims (1)
1. the tied arch strutting system of a bridge location cast-in-situ prestressed concrete continuous beam, it is characterized in that it comprises under the concrete continuous beam (3) the vertical braced structures (6) that is provided with under the two ends of the tied arch support that is provided with and concrete continuous beam (3), set gradually column (7) between tied arch support and the concrete continuous beam (3) from bottom to top, crossbeam (8), longeron (9), transverse distribution beam (18) and template system, described tied arch support comprises arch (4) and the tie-rod (5) that is connected arch (4) two ends, the junction of arch (4) and tie-rod (5) is hinged (13), and support is established in tie-rod (5) bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020177194XU CN201648978U (en) | 2010-04-28 | 2010-04-28 | Tied arch support of bridge location cast-in-situ prestressed concrete continuous beam |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020177194XU CN201648978U (en) | 2010-04-28 | 2010-04-28 | Tied arch support of bridge location cast-in-situ prestressed concrete continuous beam |
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| CN201648978U true CN201648978U (en) | 2010-11-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215898A (en) * | 2013-04-02 | 2013-07-24 | 天津市市政工程设计研究院 | Variable-cross-section concrete continuous bridge construction method |
| CN104805769A (en) * | 2015-04-07 | 2015-07-29 | 中铁第五勘察设计院集团有限公司 | Self-balance arc-shaped beam cast-in-place support and construction method thereof |
| CN105544396A (en) * | 2015-12-14 | 2016-05-04 | 广西路建工程集团有限公司 | Steel arc distributive girder structure of rod type bracket for cast-in-place arch bridge and construction method |
| CN109281256A (en) * | 2018-11-26 | 2019-01-29 | 中国铁建大桥工程局集团有限公司 | A kind of prestressed concrete beam cast-in-place construction Ultra-Long Spans bracket and application |
| CN112900273A (en) * | 2021-01-20 | 2021-06-04 | 浙江交工集团股份有限公司 | Non-contact platform for erecting cast-in-place beam support on separated old bridge and construction method thereof |
-
2010
- 2010-04-28 CN CN201020177194XU patent/CN201648978U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103215898A (en) * | 2013-04-02 | 2013-07-24 | 天津市市政工程设计研究院 | Variable-cross-section concrete continuous bridge construction method |
| CN104805769A (en) * | 2015-04-07 | 2015-07-29 | 中铁第五勘察设计院集团有限公司 | Self-balance arc-shaped beam cast-in-place support and construction method thereof |
| CN104805769B (en) * | 2015-04-07 | 2016-08-24 | 中铁第五勘察设计院集团有限公司 | A kind of self-balancing arc beam cast-in-place support and construction method thereof |
| CN105544396A (en) * | 2015-12-14 | 2016-05-04 | 广西路建工程集团有限公司 | Steel arc distributive girder structure of rod type bracket for cast-in-place arch bridge and construction method |
| CN109281256A (en) * | 2018-11-26 | 2019-01-29 | 中国铁建大桥工程局集团有限公司 | A kind of prestressed concrete beam cast-in-place construction Ultra-Long Spans bracket and application |
| CN112900273A (en) * | 2021-01-20 | 2021-06-04 | 浙江交工集团股份有限公司 | Non-contact platform for erecting cast-in-place beam support on separated old bridge and construction method thereof |
| CN112900273B (en) * | 2021-01-20 | 2022-06-10 | 浙江交工集团股份有限公司 | Non-contact platform for erecting cast-in-place beam support on separated old bridge and construction method thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101124 |
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| CX01 | Expiry of patent term |