CN104805769A - Self-balance arc-shaped beam cast-in-place support and construction method thereof - Google Patents
Self-balance arc-shaped beam cast-in-place support and construction method thereof Download PDFInfo
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- CN104805769A CN104805769A CN201510162014.8A CN201510162014A CN104805769A CN 104805769 A CN104805769 A CN 104805769A CN 201510162014 A CN201510162014 A CN 201510162014A CN 104805769 A CN104805769 A CN 104805769A
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- arc
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- bridge
- bracket
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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
Abstract
The invention discloses a self-balance arc-shaped beam cast-in-place support and a construction method thereof. The self-balance arc-shaped beam cast-in-place support comprises a bracket arranged on a bridge pier and a transverse beam is transversely arranged on the bracket; an arc-shaped beam comprises an upper-arc structure and a lower-arc structure; the upper-arc structure and the lower-arc structure are connected by a 64 type beam standard triangle and a T-shaped vertical rod to form a truss structure; spanning adjusting end frameworks are arranged at the two ends of the truss structure; the two ends of the arc-shaped bam are fixedly provided with anchor beams respectively and are erected on the transverse beam; a pull rod is arranged between the anchor beams at the two ends. A support system is simplified and the weight of the support is greatly lightened.
Description
Technical field
The present invention relates to a kind of bridge engineering technology, particularly relate to a kind of self-balancing arc beam cast-in-place support and construction method thereof.
Background technology
In Bridge Construction technical field, one of construction method that the bridge architectures such as And of Varying Depth prestressed concrete continuous beam and continuous rigid frame often adopt is planning to build the on-the-spot cast-in-situ construction in bridge position.This kind of bridge cast-in-situ support generally adopts multispan beam pillar cast-in-place support, namely steel pipe is adopted, other rod member or component are as temporary rest pier, at direction across bridge with certain pitch arrangement many, temporary rest pier is arranged direction across bridge crossbeam, crossbeam is one group with 2, Bailey beam, assembled truss beam, the existing standard equipments such as universal rod body or six or four formula railway recovery girder steels are taked multi-disc to spell prescription formula and are done beam portion, beam portion two end supports is on crossbeam, horizontal plane is generally made by beam portion, apply the distribution beam as direction across bridge such as one deck i iron or channel-section steel above again, distribution beam does total sub-semigroup, total sub-semigroup along bridge to direction across bridge with certain pitch arrangement, as everyone knows, total sub-semigroup utilizes himself base and jacking can adapt to the design curve form of various function at the bottom of the longitudinal gradient of bridge and beam.
This cast-in-place support needs to use two or more standard equipments simultaneously, adopts sandwich construction form, and the connection difficulty between each layer is large, and complexity is high, large for the alignment control difficulty of Cheng Qiao when constructing, and when especially pier height is larger, implements difficulty larger.
Summary of the invention
The object of this invention is to provide a kind of structure simple, lightweight self-balancing arc beam cast-in-place support and construction method thereof.
The object of the invention is to be achieved through the following technical solutions:
Self-balancing arc beam cast-in-place support of the present invention, comprise the bracket be located on bridge pier, on described bracket, direction across bridge is provided with crossbeam, Curved beam comprises arc structure and lower arc structure, trussed construction is connected into by six or four beam standard trigonometric sum T-shaped montants between described upper arc structure and lower arc structure, the two ends of described trussed construction are respectively equipped with adjusts across end framework, the two ends of described Curved beam be fixed with anchor beam respectively and frame on described crossbeam, be connected with pull bar between the anchor beam at two ends.
The construction method of above-mentioned self-balancing arc beam cast-in-place support of the present invention, comprises step:
In pier shaft concreting process, bracket is installed;
Bracket installs crossbeam;
With six or four beam standard triangles, T-shaped montant, adjust and organize Curved beam across end framework spelling composition more, integral hoisting is installed on crossbeam successively;
Install anchor beam and pull bar, symmetrical stretch-draw pull bar is to builder's tonnage successively;
Curved beam top distribution beam is installed, distribution beam places beam sandbag, installation form system on sandbag;
After concreting stretch-draw prestressing force complete, sandbag puts sand, and fall frame, extracts template system out successively;
Curved beam successively traversing go out bridge location, hang bridge location, remove substructure.
As seen from the above technical solution provided by the invention, the self-balancing arc beam cast-in-place support that the embodiment of the present invention provides and construction method thereof, owing to comprising the bracket be located on bridge pier, on bracket, direction across bridge is provided with crossbeam, Curved beam comprises arc structure and lower arc structure, trussed construction is connected into by six or four beam standard trigonometric sum T-shaped montants between upper arc structure and lower arc structure, the two ends of trussed construction are respectively equipped with adjusts across end framework, the two ends of Curved beam be fixed with anchor beam respectively and frame on crossbeam, be connected with pull bar between the anchor beam at two ends.Simplify strutting system, significantly alleviate weight support frame.
Accompanying drawing explanation
The longitudinal plane structure schematic diagram of the self-balancing arc beam cast-in-place support that Fig. 1 provides for the embodiment of the present invention.
The cross-sectional configuration schematic diagram of the self-balancing arc beam cast-in-place support that Fig. 2 provides for the embodiment of the present invention.
Fig. 3 is the structural representation of six or four beam standard triangles in the embodiment of the present invention.
Fig. 4 is the structural representation of T-shaped montant in the embodiment of the present invention.
Fig. 5 adjusts the structural representation across end framework in the embodiment of the present invention.
Fig. 6 is the structural representation of anchor beam in the embodiment of the present invention.
In figure:
1-six or four beam standard triangle, 2-T shape montant, 3-adjust across end framework, 4-pull bar, 5-anchor beam, 6-crossbeam, 7-bracket, 8-bridge pier, 9-And of Varying Depth prestressed concrete box shape continuous beam.
Detailed description of the invention
To be described in further detail the embodiment of the present invention below.
Self-balancing arc beam cast-in-place support of the present invention, its preferably detailed description of the invention be:
Comprise the bracket be located on bridge pier, on described bracket, direction across bridge is provided with crossbeam, Curved beam comprises arc structure and lower arc structure, trussed construction is connected into by six or four beam standard trigonometric sum T-shaped montants between described upper arc structure and lower arc structure, the two ends of described trussed construction are respectively equipped with adjusts across end framework, the two ends of described Curved beam be fixed with anchor beam respectively and frame on described crossbeam, be connected with pull bar between the anchor beam at two ends.
Described anchor beam is box structure, thereon perforate, and the end anchorage of described pull bar is in described perforate.
Many described pull bars are arranged at direction across bridge.
Described pull bar is prestressed draw-bar.
The construction method of self-balancing arc beam cast-in-place support of the present invention, its preferably detailed description of the invention be:
Comprise step:
In pier shaft concreting process, bracket is installed;
Bracket installs crossbeam;
With six or four beam standard triangles, T-shaped montant, adjust and organize Curved beam across end framework spelling composition more, integral hoisting is installed on crossbeam successively;
Install anchor beam and pull bar, symmetrical stretch-draw pull bar is to builder's tonnage successively;
Curved beam top distribution beam is installed, distribution beam places beam sandbag, installation form system on sandbag;
After concreting stretch-draw prestressing force complete, sandbag puts sand, and fall frame, extracts template system out successively;
Curved beam successively traversing go out bridge location, hang bridge location, remove substructure.
The general principle of the present invention and invention is:
As shown in Figure 1 and Figure 2, adopt existing standard reserve stock to be main member, be aided with a small amount of new tool member, the cast-in-place support originally can only spelling composition form of straight lines be assembled into the Curved beam of curve at the bottom of matching beam, and realize Curved beam Equilibrium by pull bar, and do not need outside anti-thrust block.By self-balancing arc beam two end supports on the bracket being fixed on pier shaft side, substitute a large amount of temporary rest pier steel pipe.
Six or four beam standard triangles, T-shaped montant, adjust across end framework, anchor beam is respectively as shown in Fig. 3 ~ Fig. 6.The main member of six or four formula railway recovery girder steels of six or four beam triangle system deposits is the main composition component of Curved beam.T-shaped montant and tune are a small amount of component needing processing separately across end framework.Anchor beam can adopt box structure, thereon perforate, for anchoring rod.Curved beam mainly adopts six or four beam standard triangles to spell group, and T-shaped montant plays the effect regulating Curved beam curvature to realize curve at the bottom of matching beam, adjusts and can regulate the span of Curved beam across end framework and utilize its montant to be supported on crossbeam.Anchor beam is welded on the two ends of adjusting across end framework, for anchoring rod.Rod anchor, at the two ends of Curved beam, as required, arranges many at direction across bridge, is used for resisting the horizontal thrust of Curved beam, realizes the Equilibrium of Curved beam, to pull bar Shi Hanzhang, in order to adjust the camber of Curved beam.
Bracket is arranged at permanent pier side, and it places crossbeam, and crossbeam is as the bearing of Curved beam.
Below in conjunction with accompanying drawing, structure of the present invention is described in detail:
As shown in Figures 1 to 6, four formula railway recovery girder steels are a kind of pin joint structures, easy to connect, rapid, a kind of self-balancing arc beam cast-in-place support utilizes six or four beam standard triangles 1 to carry out spelling group for main member, six or four beam standard triangles 1 with pin-and-hole center to center distance calculated length be 4m, height for 1.5m, width is 0.52m, and being assembled into double-deck rear its is highly 3m.As required, arrange some groups at direction across bridge, between each group, adopt channel-section steel and U bolt to connect integrally.T-shaped montant 2 is one and the similar rod member of six or four beam chord member, but two pin-and-holes are established in its " T-shaped " upper end, be arranged between six or four beam standard triangle 1 upper chord nodes, make lengthening of winding up, form arc, " T-shaped " lower end establishes a pin-and-hole, merges and is arranged on corresponding lower-chord panel point pin-and-hole place, ensures the stability of total.Adjust and be in the two ends of Curved beam across end framework 3, be used for regulating the length of Curved beam, and form support node, be supported on crossbeam 6, crossbeam 6 is installed on bracket 7.Bracket 7 is installed on pier shaft side, determines highly as required.
Curved beam is adjusting the fulcrum place across end framework 3 to produce horizontal thrust under load action, and pull bar 4 is used for resisting this horizontal thrust, forms self equilibrium systems.As required, pull bar 4 arranges some at direction across bridge, utilizes anchor beam 5 to carry out anchoring.
The construction method of specific embodiment is:
(1) in pier shaft concreting process, bracket 7 is installed; (2) on bracket 7, crossbeam 6 is installed; (3) with six or four beam standard triangles 1, T-shaped montant 2, adjust across end framework 3 spell composition organize Curved beam more, integral hoisting is installed on crossbeam 6 successively; (4) install anchor beam 5 and pull bar 4, symmetrical stretch-draw pull bar 4 is to builder's tonnage successively; (5) Curved beam top distribution beam is installed, distribution beam places beam sandbag, installation form system on sandbag; (6), after concreting stretch-draw prestressing force complete, sandbag puts sand, and fall frame, extracts template system out successively; Curved beam successively traversing go out bridge location, hang bridge location, remove substructure.Construction completes.
Beneficial effect of the present invention can be summarized as four aspects:
(1) self-balancing arc beam cast-in-place support mainly adopts reserve stock six or four beam standard triangle to spell group, be aided with a small amount of T-shaped montant and adjust across end framework, curve at the bottom of the beam of matching And of Varying Depth beam, it directly lays distribution beam and template system, eliminate bowl button support and bearing beam system thereof that usual support also needs at an upper portion thereof, simplify strutting system, significantly alleviate weight support frame.
(2) Curved beam mainly adopts a kind of component i.e. six or four beam standard triangle spelling groups, instead of group spelled by the multiple types equipment usually adopted, and the linear of Cast-in-situ Beam is more easily guaranteed.
(3) adopt pull bar to overcome the horizontal force of support generation, achieve self-balancing, do not need opposing thrust bearing.
(4) bracket instead of normally used steel pipe post, saves the great deal of steel that buttress system uses.
Specific embodiment one:
(1) in pier shaft concreting process, the large mileage and little mileage direction of pier shaft install at least 2 brackets 7 respectively; (2) on bracket 7, direction across bridge installs at least 2 as the crossbeam 6 of a group; (3) spell composition across end framework 3 organize Curved beam more with multiple six or four beam standard triangles 1, multiple T-shaped montant 2, multiple tune, integral hoisting is installed on crossbeam 6 successively; (4) install anchor beam 5 and Duo Gen pull bar 4 in termination, rack beams portion, every hole, symmetrical stretch-draw pull bar 4 is to builder's tonnage successively; (5) Curved beam top distribution beam is installed, distribution beam places beam sandbag, installation form system on sandbag; (6), after concreting stretch-draw prestressing force complete, sandbag puts sand, and fall frame, extracts template system out successively; Curved beam successively traversing go out bridge location, hang bridge location, remove substructure.Construction completes.
Specific embodiment two:
In embodiment one, bracket 7 can be cancelled, replace steel pipe buttress, steel pipe buttress is supported on cushion cap or on ground.
The above; be only the present invention's preferably detailed description of the invention, but protection scope of the present invention is not limited thereto, is anyly familiar with those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (5)
1. a self-balancing arc beam cast-in-place support, it is characterized in that, comprise the bracket be located on bridge pier, on described bracket, direction across bridge is provided with crossbeam, Curved beam comprises arc structure and lower arc structure, connects into trussed construction between described upper arc structure and lower arc structure by six or four beam standard trigonometric sum T-shaped montants, and the two ends of described trussed construction are respectively equipped with adjusts across end framework, the two ends of described Curved beam be fixed with anchor beam respectively and frame on described crossbeam, be connected with pull bar between the anchor beam at two ends.
2. self-balancing arc beam cast-in-place support according to claim 1, is characterized in that, described anchor beam is box structure, thereon perforate, and the end anchorage of described pull bar is in described perforate.
3. self-balancing arc beam cast-in-place support according to claim 2, is characterized in that, arranges many described pull bars at direction across bridge.
4. self-balancing arc beam cast-in-place support according to claim 3, is characterized in that, described pull bar is prestressed draw-bar.
5. a construction method for the self-balancing arc beam cast-in-place support described in any one of Claims 1-4, is characterized in that, comprise step:
In pier shaft concreting process, bracket is installed;
Bracket installs crossbeam;
With six or four beam standard triangles, T-shaped montant, adjust and organize Curved beam across end framework spelling composition more, integral hoisting is installed on crossbeam successively;
Install anchor beam and pull bar, symmetrical stretch-draw pull bar is to builder's tonnage successively;
Curved beam top distribution beam is installed, distribution beam places beam sandbag, installation form system on sandbag;
After concreting stretch-draw prestressing force complete, sandbag puts sand, and fall frame, extracts template system out successively;
Curved beam successively traversing go out bridge location, hang bridge location, remove substructure.
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| CN201510162014.8A CN104805769B (en) | 2015-04-07 | 2015-04-07 | A kind of self-balancing arc beam cast-in-place support and construction method thereof |
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| CN201510162014.8A CN104805769B (en) | 2015-04-07 | 2015-04-07 | A kind of self-balancing arc beam cast-in-place support and construction method thereof |
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| CN104805769A true CN104805769A (en) | 2015-07-29 |
| CN104805769B CN104805769B (en) | 2016-08-24 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839540A (en) * | 2016-04-29 | 2016-08-10 | 贵州桥梁建设集团有限责任公司 | Arrangement method and composition structure for rigid frame bridge zero section non-welded support |
| CN105839541A (en) * | 2016-04-29 | 2016-08-10 | 贵州桥梁建设集团有限责任公司 | Construction method for rigid frame bridge No.0 section non-welding support and structure |
| CN107245950A (en) * | 2017-06-22 | 2017-10-13 | 中铁十五局集团有限公司 | A kind of bridge falls frame structure and the bridge with the structure falls frame method |
| CN111827119A (en) * | 2020-07-15 | 2020-10-27 | 中国建筑土木建设有限公司 | Connecting structure of cast-in-situ variable cross-section beam body formwork and construction method thereof |
| CN113897870A (en) * | 2021-10-15 | 2022-01-07 | 广西路桥工程集团有限公司 | Assembled longitudinal beam, assembled buttress-free support, assembled buttress-free system and design method of assembled longitudinal beam and assembled buttress-free support |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105839540A (en) * | 2016-04-29 | 2016-08-10 | 贵州桥梁建设集团有限责任公司 | Arrangement method and composition structure for rigid frame bridge zero section non-welded support |
| CN105839541A (en) * | 2016-04-29 | 2016-08-10 | 贵州桥梁建设集团有限责任公司 | Construction method for rigid frame bridge No.0 section non-welding support and structure |
| CN107245950A (en) * | 2017-06-22 | 2017-10-13 | 中铁十五局集团有限公司 | A kind of bridge falls frame structure and the bridge with the structure falls frame method |
| CN111827119A (en) * | 2020-07-15 | 2020-10-27 | 中国建筑土木建设有限公司 | Connecting structure of cast-in-situ variable cross-section beam body formwork and construction method thereof |
| CN111827119B (en) * | 2020-07-15 | 2022-05-17 | 中国建筑土木建设有限公司 | Connecting structure of cast-in-situ variable cross-section beam body formwork and construction method thereof |
| CN113897870A (en) * | 2021-10-15 | 2022-01-07 | 广西路桥工程集团有限公司 | Assembled longitudinal beam, assembled buttress-free support, assembled buttress-free system and design method of assembled longitudinal beam and assembled buttress-free support |
| CN113897870B (en) * | 2021-10-15 | 2022-07-08 | 广西路桥工程集团有限公司 | Assembled longitudinal beam, assembled buttress-free support, assembled buttress-free system and design method of assembled longitudinal beam and assembled buttress-free support |
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