CN210657938U - Deck arch-rigid frame continuous beam combined bridge - Google Patents
Deck arch-rigid frame continuous beam combined bridge Download PDFInfo
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- CN210657938U CN210657938U CN201920803752.XU CN201920803752U CN210657938U CN 210657938 U CN210657938 U CN 210657938U CN 201920803752 U CN201920803752 U CN 201920803752U CN 210657938 U CN210657938 U CN 210657938U
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Abstract
The utility model discloses a through arch-rigid frame continuous beam combined bridge, which is characterized in that the bridge comprises through arch (3) and rigid frame continuous beam units; the rigid frame continuous beam unit comprises a continuous beam (4) and a rigid frame (5) which are connected end to end; the continuous beam (4) comprises a continuous beam body (401) and an arch upright post (402), the arch upright post (402) is arranged at the top of the deck arch (3), and a longitudinal movable support (403) is arranged at the top of the arch upright post (402); the rigid frame (5) comprises a rigid frame beam body (501) and a high pier (502), wherein the rigid frame beam body (501) is arranged above the high pier (502). The utility model discloses a rigid frame continuous beam replaces the simple beam among the prior art, through optimizing superstructure form, is favorable to reinforcing structural integrity, improves the driving travelling comfort, reduces and encircles stand, reduction of erection time.
Description
Technical Field
The utility model belongs to the technical field of bridge engineering, more specifically relates to a deck type encircles-continuous beam combination bridge of rigid frame.
Background
The mountain areas in China are wide in area, which accounts for two thirds of the total area of the whole country, most mountain railways in the mountain areas are deep in high valleys, terrains are steep, geology is complex, and traffic is inconvenient. In order to adapt to the technical requirements of mountain canyons, railway route selection and the like, along with the construction of high-speed railways, particularly the rapid development of the mountain high-speed railways in China, large-span bridges are increasingly required to span the high-mountain canyons, and the deck arch bridge has better adaptability and economical efficiency to the high-mountain canyon terrain.
At present, the arch structure of the deck arch bridge generally adopts a simple supported beam, as shown in fig. 1, a plurality of arch upright posts are arranged at the arch top, a section of simple supported beam is arranged at the top of the adjacent arch upright post, a simple supported beam is also arranged between the adjacent arch upright post and the arch foot upright post, and the form of the simple supported beam adopted in the prior art has the following adverse factors:
(1) the structural system formed by the simply supported beam and the arch does not realize stress integration, and the integrity is poor, so that the integral rigidity is weak, the rigidity is weak, and the driving comfort of a high-speed railway is not facilitated;
(2) the simple supporting beam has poor spanning capability, and in order to improve the overall stability of the bridge, a large number of arch upright posts are required to be arranged, and the number of the arch upright posts is densely distributed, so that the workload and the construction difficulty of high-speed work are increased;
(3) the simply-supported beam can be erected after being prefabricated, and can also be erected with a support on the arch for cast-in-place, but the prefabricated erection is often limited by the transportation conditions of mountainous areas, and the support needs to be erected on the arch for cast-in-place, so that the construction risk is high.
SUMMERY OF THE UTILITY MODEL
To the above defect or improvement demand of prior art, the utility model provides a deck type encircles-rigid frame continuous beam combination bridge adopts rigid frame continuous beam to replace the simple beam among the prior art, through optimizing superstructure form, reaches reinforcing structural integrity, improves driving travelling comfort, reduces and encircles the stand, convenient construction, reduction of erection time etc. purpose.
In order to achieve the aim, the invention provides a through arch-rigid frame continuous beam combined bridge, which comprises a through arch and at least two rigid frame continuous beam units arranged above the through arch; wherein the content of the first and second substances,
the rigid frame continuous beam unit comprises a continuous beam and a rigid frame which are connected end to end;
the continuous beam comprises a continuous beam body and an arch upright post, the arch upright post is arranged at the top of the deck arch, and a longitudinal movable support is arranged at the top of the arch upright post and used for supporting the continuous beam body above the arch upright post;
the rigid frame comprises a rigid frame beam body and a high pier, and the rigid frame beam body is arranged above the high pier.
Furthermore, an upright post is arranged between the rigid frame beam body and the high pier.
Furthermore, the deck arch comprises arch rings and arch feet, and one end of each of the upper arch ring and the lower arch ring is fixedly connected with the arch feet on the two longitudinal sides.
Further, the high pier is positioned at the top of the arch springing.
Further, each adjacent rigid frame continuous beam unit shares one connecting pier.
Further, the connecting pier is arranged at the top of the deck arch.
Furthermore, an expansion joint is arranged between each rigid frame continuous beam unit and is positioned at the top of the connecting pier.
Further, according to the actual situation of the terrain and construction conditions, the continuous beam rigid frame units on the upper bearing type arch and the arch are symmetrically arranged.
Further, at least one of the arched columns is arranged.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:
(1) the utility model discloses a deck-type encircles-rigid frame continuous beam combination bridge adopts rigid frame continuous beam to replace the simple beam among the prior art, has overcome the deck-type and has encircleed the simple beam in the simple beam bridge and erect and the economic benefits scheduling problem in structural performance, construction, have that the wholeness is strong, rigidity is big, the travelling comfort is good, the atress performance is excellent, it is few to encircle the stand, erect construction convenience, the time limit for a project is short, advantage such as the view effect is good, the travelling comfort of high-speed railway has been improved.
(2) The utility model discloses a deck type encircles-continuous beam combination bridge of rigid frame, superstructure adopt the combination of the continuous beam unit of rigid frame, and the leap over ability of the continuous beam of rigid frame is far greater than the simply supported roof beam, can reduce by a wide margin in the quantity of hunch stand, reduces the work load of the construction of pouring in the high altitude.
Drawings
FIG. 1 is a schematic view of a prior art deck arch-simply supported beam bridge construction;
fig. 2 is a first structural schematic view of a deck arch-rigid frame continuous beam composite bridge according to an embodiment of the present invention;
fig. 3 is a schematic structural view of a deck arch-rigid frame continuous beam composite bridge according to an embodiment of the present invention;
fig. 4 is a schematic view of arch ring erection related to the deck arch-rigid frame continuous beam composite bridge according to the embodiment of the present invention;
fig. 5 is a schematic view of an arch-over rigid frame continuous beam related to a deck arch-rigid frame continuous beam composite bridge according to an embodiment of the present invention.
In all the figures, the same reference numerals denote the same features, in particular: 1-existing deck arch-simply supported girder bridges; 101-terrain line, 102-arch springing, 103-arch, 104-arch upright post, 105-arch springing upright post and 106-simply supported beam; 2-terrain line, 3-deck arch, 301-arch ring and 302-arch springing; 4-continuous beam, 401-continuous beam body, 402-arch upright post and 403-support; 5-rigid frame, 501-rigid frame beam body, 502-high pier and 503-upright post; 6-connecting piers, 7-expansion joints, 8-temporary buckling towers, 9-cable hangers, 10-hanging baskets, 11-temporary supports and 12-combination beams;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
Fig. 1 is a schematic view of a conventional deck arch-simply supported girder bridge structure. As shown in fig. 1, the upper structure of the existing deck arch bridge adopts the technology of a simple supported beam, the tops of arch springs 102 at two ends are provided with arch springing upright columns 105, the top of an arch 103 is provided with a plurality of arch springing upright columns 104, the tops of adjacent arch springing upright columns 104 are provided with a section of simple supported beam 106, a simple supported beam 106 is also arranged between the adjacent arch springing upright columns 104 and the arch springing upright columns 105, in addition, an edge pier is also arranged between the arch springing upright columns 105 and a bearing platform foundation in a mountain body at two sides, and the upper part is correspondingly provided with the simple supported beam 106. By adopting a structure of a top bearing arch-simply supported beam, a structural system formed by the simply supported beam and the arch does not realize stress integration, so that the integral rigidity is weak; by adopting the structure of the upper bearing type arch-simply supported beam, dense piers need to be arranged on the arch, so that the workload and the construction difficulty of high-altitude construction work are increased; the construction of the simply supported beam has certain difficulty.
Fig. 2 is the utility model discloses a bolster arch-rigid frame continuous beam composite bridge structure schematic diagram one, fig. 3 is the utility model discloses a bolster arch-rigid frame continuous beam composite bridge structure schematic diagram two combines fig. 2 and fig. 3 to know, the utility model discloses a bolster arch-rigid frame continuous beam composite bridge structure, including bolster arch 3, rigid frame continuous beam unit, connection mound 6 and expansion joint 7. The rigid frame continuous beam unit comprises a continuous beam 4 and a rigid frame 5 which are connected in a tail-ending manner; at least two rigid frame continuous beam units are arranged above the upper supporting arch 3, and each adjacent rigid frame continuous beam unit shares one connecting pier 6.
The embodiment of the utility model discloses an example is taken the two continuous beam units of rigid frame of arranging to describe in detail, specifically, and the formula of taking over encircles 3 including arch ring 301 and hunch foot 302, and hunch foot 302 is located below the topography line 2 of massif both sides, and the one end of upper and lower arch ring 301 respectively with the hunch foot 302 fixed connection of vertical both sides. The continuous beam 4 comprises a continuous beam body 401, an arch upright column 402 and a support 403, wherein the arch upright column 402 is arranged at the top of the upper arch ring 301, and a longitudinal movable support 403 is arranged at the top of the arch upright column 402 and is used for supporting the continuous beam body 401 above. Preferably, at least one of the arch uprights 402 is provided, the rigid frame 5 comprises a rigid frame beam body 501 and a high pier 502, the high pier 502 is positioned at the top of the arch springing 302, and the rigid frame beam body 501 is arranged above the high pier 502. The height of the high piers 502 may not be uniform, but in order to improve the force stability of the integral composite bridge, it is necessary to ensure that the longitudinal stiffness of the integral bridge is substantially uniform. Preferably, rigid frame 5 still includes stand 503, and stand 503 is located arch ring 301 top, and the length of stand 503 changes along with the change of arch ring curve, and of course the utility model discloses also can not set up stand 503 above arch ring 301, when not setting up stand 503, rigid frame 5 only has high mound 502, forms T type rigid frame.
Further, an expansion joint 7 is arranged between each rigid frame continuous beam unit for releasing temperature load.
Preferably, the upper bearing type arch 3 and the continuous beam rigid frame units on the arch are symmetrically arranged according to the actual situation of the terrain and the construction conditions, so that the integral stress is facilitated.
Preferably, a connecting pier 6 between two adjacent rigid frame continuous beam units is arranged at the top of the arch ring 301, and the expansion joint 7 is arranged at the top of the connecting pier 6.
In comparison, the utility model discloses a deck-type encircles-rigid frame continuous beam combination bridge adopts rigid frame continuous beam to replace the simple beam among the prior art, through optimizing superstructure form, has overcome the problem that the simple beam in the deck-type encircles-simple beam bridge exists in structural performance, construction erects and economic benefits etc. has that the wholeness is strong, rigidity is big, driving travelling comfort is good, the atress performance is excellent, it is few to arch the stand, erect construction convenience, the time limit for a project is short, advantage such as view effect is good, high-speed railway's driving travelling comfort has been improved.
The utility model discloses a deck type encircles-continuous beam combination bridge of rigid frame, superstructure adopt the combination of the continuous beam unit of rigid frame, and the leap ability of the continuous beam of rigid frame is far more than the simply supported roof beam, consequently contrast figure 1 and figure 2 can know, can reduce by a wide margin in the quantity of hunch stand, reduce the work load of the construction of pouring in the high altitude.
In addition, compare fig. 1 and fig. 2, the utility model discloses need not set up the side mound at longitudinal girder bridge both ends, only set up rigid frame 5 at both ends and just can satisfy the atress and bear the weight of the requirement.
The utility model adopts the mode of combining the rigid frame and the continuous beam, if the rigid frame is adopted completely, the longitudinal load release of temperature is not facilitated due to no deformation joint and the like; if the continuous beam is adopted, the integral rigidity cannot meet the requirement, and the integrity is poor; therefore, in consideration of the overall stress, the form of the rigid frame continuous beam is preferably selected.
The utility model also provides a construction method of the deck-rigid frame continuous beam combined bridge, and FIG. 4 is an arch ring erection schematic diagram related to the deck arch-rigid frame continuous beam combined bridge of the embodiment of the utility model; fig. 5 is a schematic view of a rigid-frame continuous beam on an arch related to a deck-type arch-rigid-frame continuous beam composite bridge according to an embodiment of the present invention, and with reference to fig. 4 and 5, the method specifically includes the following steps:
s1: setting arch springing 302 at two ends of a mountain respectively, and constructing a high pier 502 on the arch springing 302;
s2: a temporary buckle tower 8 is erected on the high pier 502, a plurality of back cables are arranged on the temporary buckle tower 8, one end of each back cable is fixedly connected with the temporary buckle tower 8, and the other end of each back cable is fixedly connected with the two sides of the mountain; meanwhile, inhaul cables are arranged between the upper bearing type arches 3 on the two sides and the temporary buckling towers 8 corresponding to the two sides;
s3: hoisting an arch ring 301 by adopting a cable crane 9 arranged between buckling towers, and arranging a stand column 503 on the arch ring 301;
s4: after the temporary buckling tower 8 is dismantled, the high piers 502 and the upright columns 503 are used as fulcrums, and the hanging baskets (10) are symmetrically cast to the two sides of the longitudinal bridge in a cantilever manner respectively until closure; the span of the rigid frame 5 is increased as much as possible by combining the specific topography of the side span, the rigid frame beam body 501 is preferably of variable cross section, and is preferably hung and irrigated symmetrically by using a hanging basket;
s5: the continuous beam body 401 adopts a steel-concrete combined beam, a temporary support 11 is arranged below the combined beam 12, a steel box beam of the combined beam 12 is hoisted firstly, a precast concrete slab is assembled on the steel box beam, the continuous beam body 401 is connected with a rigid frame beam body 501 through a joint section, rigid frame continuous beam units are symmetrical about an arch crown, the rigid frame continuous beam units share a connecting pier 6 of the arch crown, and an expansion joint 7 is arranged between the two rigid frame continuous beam units.
It should be noted that the continuous beam body 401 can be a prestressed concrete beam, pier tops are needed to be temporarily solidified at the position far away from the arch tops, and hanging baskets are needed to be symmetrically filled in a hanging mode; the part near the pier top is preferably cast by adopting a bracket; the continuous beam body 401 can also adopt a combination beam, the steel structure of the combination beam is suitable for integral hoisting, the concrete slabs of the combination beam are suitable for segment prefabrication field joint assembly, and the combination beam and the rigid frame 5 are connected by adopting a steel-concrete combination section.
The utility model discloses a construction method of a deck-rigid frame continuous beam combined bridge, wherein a rigid frame part adopts hanging baskets to symmetrically suspend and irrigate; the continuous beam part can be symmetrically hung and poured by adopting hanging baskets, a support can be erected near the vault for cast-in-place, a combination beam can also be adopted, and the top plate of the combination beam is spliced on site by adopting precast concrete plates. The construction method is flexible, the erection is convenient and fast, and the construction period is short.
The utility model discloses a deck type encircles-rigid frame continuous beam combination bridge has solved a series of technological problems that deck type arch bridge superstructure adopted the simple beam to bring, has advantages such as simple structure, construction convenience, economy and social are showing, the development of booster high-speed railway mountain area large-span deck type arch bridge.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (9)
1. A deck-type arch-rigid continuous beam combined bridge is characterized by comprising a deck-type arch (3) and at least two rigid continuous beam units arranged above the deck-type arch (3); wherein the content of the first and second substances,
the rigid frame continuous beam unit comprises a continuous beam (4) and a rigid frame (5) which are connected end to end;
the continuous beam (4) comprises a continuous beam body (401) and an arch upright post (402), the arch upright post (402) is arranged at the top of the deck arch (3), and a longitudinal movable support (403) is arranged at the top of the arch upright post (402) and used for supporting the continuous beam body (401) above;
the rigid frame (5) comprises a rigid frame beam body (501) and a high pier (502), wherein the rigid frame beam body (501) is arranged above the high pier (502).
2. A Deck-arch-rigid frame continuous beam composite bridge according to claim 1, wherein a pillar (503) is further provided between the rigid frame beam body (501) and the high pier (502).
3. A Deck-arch-rigid-frame continuous beam composite bridge according to claim 1 or 2, wherein the deck arch (3) comprises an arch ring (301) and arch springing (302), and one end of each of the upper and lower arch rings (301) is fixedly connected to the arch springing (302) at both longitudinal sides.
4. A deck-arch-rigid-frame continuous beam composite bridge according to claim 3, wherein the high pier (502) is located on top of the arch springing (302).
5. A deck-arch-rigid-frame continuous beam composite bridge according to claim 1, wherein each adjacent rigid-frame continuous beam unit shares a connecting pier (6).
6. A Deck-arch-rigid-frame continuous beam composite bridge according to claim 5, wherein the connecting piers (6) are provided on top of the Deck arch (3).
7. A superstructure arch-rigid continuous beam composite bridge according to claim 5, wherein an expansion joint (7) is provided between each rigid continuous beam unit, the expansion joint (7) being located at the top of the connecting pier (6).
8. A deck-arch-rigid-frame continuous beam composite bridge according to claim 1, wherein the deck-arch (3) and the continuous beam rigid frame units on the arch are symmetrically arranged according to the actual situation of the terrain and the construction conditions.
9. A deck-arch-rigid-frame continuous beam composite bridge according to claim 1, wherein at least one of the arch studs (402) is provided.
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| CN201920803752.XU CN210657938U (en) | 2019-05-30 | 2019-05-30 | Deck arch-rigid frame continuous beam combined bridge |
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| CN201920803752.XU CN210657938U (en) | 2019-05-30 | 2019-05-30 | Deck arch-rigid frame continuous beam combined bridge |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130203A (en) * | 2019-05-30 | 2019-08-16 | 中铁第四勘察设计院集团有限公司 | A kind of deck type arch-rigid frame-continuous girder composite bridge and construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110130203A (en) * | 2019-05-30 | 2019-08-16 | 中铁第四勘察设计院集团有限公司 | A kind of deck type arch-rigid frame-continuous girder composite bridge and construction method |
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