CN111005301A - Assembled combined beam bridge and construction method thereof - Google Patents
Assembled combined beam bridge and construction method thereof Download PDFInfo
- Publication number
- CN111005301A CN111005301A CN201911358571.1A CN201911358571A CN111005301A CN 111005301 A CN111005301 A CN 111005301A CN 201911358571 A CN201911358571 A CN 201911358571A CN 111005301 A CN111005301 A CN 111005301A
- Authority
- CN
- China
- Prior art keywords
- bridge
- beam section
- span
- section
- pier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/02—Bridges characterised by the cross-section of their bearing spanning structure of the I-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/02—Piers; Abutments ; Protecting same against drifting ice
-
- 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 relates to an assembled combined beam bridge and a construction method thereof. The assembled combined beam bridge comprises a bridge abutment, bridge piers and a beam body, wherein the beam body comprises a pier top beam section group, a side beam section group and a mid-span beam section group which are arranged along the bridge length direction, and each beam section group comprises at least two corresponding beam sections arranged along the bridge width direction; or the beam body comprises a pier top beam section, a side beam section and a span middle beam section which are arranged along the length direction of the bridge; the middle of the pier top beam section is supported on a pier, and two ends of the pier top beam section are suspended on two sides of the pier; one end of the side beam section is fixedly supported on the abutment, and the other end of the side beam section is fixedly connected with the pier top beam section; the middle-span beam section is positioned between two adjacent piers, and two ends of the middle-span beam section are fixedly connected with the pier top beam section respectively; the maximum value of the length of the beam section in each beam section is smaller than the maximum value of each span in the assembled combined beam bridge.
Description
Technical Field
The invention relates to an assembled combined beam bridge and a construction method thereof.
Background
The conventional bridge generally adopts a reinforced concrete or prestressed concrete structure, needs to be cast in situ or erected in a whole hole after prefabrication, and the construction method of cast in situ has long construction period and is not beneficial to the requirement of rapid traffic of roads. In the method of whole-hole erection, the beam sections are prefabricated in a prefabrication factory, the prefabricated beam sections are transported to a construction site for erection, the construction progress is fast, the construction period is short, the requirement of rapid traffic of roads can be met, for a large-span bridge, the transportation difficulty of the beam sections can be increased due to the large length of the beam, and the stability problem is easy to occur in the erection process.
Disclosure of Invention
The invention aims to provide an assembled combined beam bridge, which aims to solve the technical problems of high transportation difficulty of bridge erection and low stability in the bridge erection process in the prior art; correspondingly, the invention also aims to provide a construction method of the assembled combined beam bridge, so as to solve the technical problems of high transportation difficulty and low stability in the bridge erection process in the prior art.
The assembly type combined beam bridge adopts the following technical scheme: the assembled combined beam bridge comprises bridge abutments and bridge piers, and at least two bridge piers are arranged; the assembled combined beam bridge also comprises a beam body, wherein the beam body comprises a pier top beam section group, a side beam section group and a mid-span beam section group which are arranged along the length direction of the assembled combined beam bridge, the pier top beam section group comprises at least two pier top beam sections which are arranged along the width direction of the assembled combined beam bridge, the side beam section group comprises at least two side beam sections which are arranged along the width direction of the assembled combined beam bridge, and the mid-span beam section group comprises at least two mid-span beam sections which are arranged along the width direction of the assembled combined beam bridge; or the assembled combined beam bridge also comprises a beam body which is formed by splicing pier top beam sections, side beam sections and mid-span beam sections which are arranged along the length direction of the assembled combined beam bridge; the middle of the pier top beam section is supported on a pier, and two ends of the pier top beam section are suspended on two sides of the pier; one end of the side beam section is fixedly supported on the abutment, and the other end of the side beam section is fixedly connected with the pier top beam section; the middle-span beam section is positioned between two adjacent piers, and two ends of the middle-span beam section are fixedly connected with the pier top beam section respectively; the maximum value of the length of the beam section in each beam section is smaller than the maximum value of each span in the assembled combined beam bridge.
The invention has the beneficial effects that: the beam body of the assembled composite beam bridge comprises a pier top beam section, a side beam section and a span-middle beam section, or the beam body of the assembled composite beam bridge is formed by splicing the pier top beam section, the side beam section and the span-middle beam section. The assembled combined beam bridge meets the condition that the maximum value of the length of the beam section in each beam section is smaller than the maximum value of each span in the assembled combined beam bridge. Compared with the bridge structure erected through the whole holes in the prior art, the length of the beam section can be reduced, the transportation difficulty of the beam section is reduced, and the stability of the beam section in the erecting process is improved.
Furthermore, each beam section is a T beam section, and each T beam section all includes roof plate, bottom plate and connects the wave form steel web between roof plate and bottom plate. The T-shaped beam section is simple in structural form and convenient to assemble, and the stability of a beam body of the combined beam bridge in the assembling process can be improved.
Further, the bottom plate of the pier top beam section is a steel-concrete bottom plate, and the steel-concrete bottom plate comprises a bottom steel flange plate in a U-shaped structure and concrete poured in the bottom steel flange plate. Concrete is poured into the bottom steel flange plate of the U-shaped structure, a bottom template can be avoided, the manufacturing process of the bottom plate in the pier top beam section is simplified, the structure is simple, and the manufacturing is convenient.
Furthermore, a shear key is arranged in the bottom steel flange plate of the U-shaped structure. The arrangement of the shear keys in the bottom steel flange plate can improve the strength of the bottom plate and the stability in the erecting process of the pier-top beam section.
Further, the top plate of the pier top beam section is a steel-concrete top plate, and a prestressed steel beam is arranged in the steel-concrete top plate. Due to the arrangement of the prestressed steel bundles, the strength of the top plate can be increased, and the structural strength of the pier top beam section is improved.
Further, the prestressed steel strand is disposed in the steel-concrete roof panel by a pretensioning method. The prestressed steel bundles arranged by the pre-tensioning method can be carried out in a prefabrication factory, and the anchorage device can be recycled, so that beam section prefabricated materials are saved, and the prefabrication process of the top plate is simplified.
Further, the absolute value of the bending moment borne by the connecting part at least at one of the two ends of the pier top beam section is equal to the minimum value of the absolute value of the bending moment in the span where the connecting part is located. The service life of the whole assembled combined beam bridge can be further prolonged by the structural arrangement.
Further, the span range of the assembled composite beam bridge is 50-60 meters, wherein the span ranges of the side beam section, the pier top beam section and the span middle beam section are 38-43 meters, 27-32 meters and 24-29 meters respectively. The structure of the assembled composite beam bridge which meets the condition size setting is more reasonable.
Furthermore, all spans in the assembled combined beam bridge are equal. The assembled composite beam bridge with the structure is simple in structure and convenient to assemble.
The construction method of the assembled combined beam bridge adopts the following technical scheme: erecting pier top beam sections in the length direction of the assembled combined beam bridge, erecting span middle beam sections and side beam sections, and pouring longitudinal wet joints between two adjacent beam sections to form a longitudinal beam bridge group along the length direction of the bridge; or in the length direction of the assembled composite beam bridge, firstly erecting pier top beam sections, then erecting span middle beam sections and side beam sections, pouring longitudinal wet joints between two adjacent beam sections to form longitudinal beam bridge groups along the bridge length direction, then erecting adjacent longitudinal beam bridge groups in the width direction of the assembled composite beam bridge until all the longitudinal beam bridge groups are erected, and in the width direction of the assembled composite beam bridge, connecting transverse wet joints between the longitudinal beam bridge groups; in the process of erecting the longitudinal beam bridge group, pre-positioning two adjacent beam sections in the length direction of the assembled combined beam bridge through a hanger; the middle of each beam section is supported on the pier, two ends of each beam section are suspended on two sides of the pier, one end of each side beam section is supported on the abutment, the other end of each side beam section is fixedly connected with the pier top beam section, two ends of each span middle beam section are fixedly connected with the pier top beam section, and the maximum length of each beam section middle beam section is smaller than the maximum length of the span middle of the assembled combined beam bridge.
The invention has the beneficial effects that: in the construction method of the assembled composite beam bridge, the pier top beam section is erected firstly, and then the side beam section and the mid-span beam section are erected, so that the construction period of the whole composite beam bridge can be shortened, and the structural stability in the erection process of the composite beam bridge is improved; and the maximum value of the length of the beam section in each beam section is smaller than the maximum value of the span length of the assembled combined beam bridge, and compared with a bridge structure erected through a whole hole in the prior art, the length of the beam section can be reduced, and the transportation difficulty of the beam section is reduced.
Drawings
Fig. 1 is a schematic view illustrating a bending moment distribution of a fabricated composite girder bridge in a constant load state according to embodiment 1 of the fabricated composite girder bridge of the present invention;
fig. 2 is a schematic structural view of a pier-top beam section in embodiment 1 of the fabricated composite girder bridge of the present invention;
fig. 3 is a schematic structural view of another pier-top beam section in embodiment 1 of the fabricated composite girder bridge according to the present invention;
FIG. 4 is a schematic structural view of a side girder segment in embodiment 1 of the fabricated composite girder bridge according to the present invention;
FIG. 5 is a schematic structural view of another side girder segment in embodiment 1 of the fabricated composite girder bridge according to the present invention;
fig. 6 is a schematic structural view of the assembled composite girder bridge according to embodiment 1 of the present invention after erection of the pier top beam section;
fig. 7 is a schematic structural view illustrating an erection process of a side girder segment and a midspan girder segment in embodiment 1 of the fabricated composite girder bridge according to the present invention;
fig. 8 is a schematic structural view of an assembled composite girder bridge according to embodiment 1 of the present invention after the girder segments are erected;
fig. 9 is a plan view of a fabricated composite girder bridge according to embodiment 1 of the fabricated composite girder bridge of the present invention;
FIG. 10 is an enlarged view of the structure at A in FIG. 8;
FIG. 11 is a schematic cross-sectional view at B in FIG. 9;
FIG. 12 is a schematic cross-sectional view at C of FIG. 9;
in the figure: 1-abutment, 2-bridge pier, 3-pier top beam section, 4-side beam section, 5-span middle beam section, 6-steel-concrete bottom plate, 7-bottom steel flange plate, 8-shear key, 9-steel-concrete top plate, 10-top flat steel plate, 11-transverse steel bar, 12-longitudinal steel bar, 13-corrugated steel web plate, 14-prestressed steel bundle, 15-transverse wet joint, 16-longitudinal wet joint, 17-transverse partition plate, 18-cross beam, 19-manhole, 20-hanger, 21-node plate and 22-bottom flat steel plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The features and properties of the present invention are described in further detail below with reference to examples.
Embodiment 1 of assembled composite girder bridge of the present invention:
as shown in fig. 7 and 8, the fabricated composite girder bridge includes two abutments 1 and two piers 2, and further includes a girder body supported on the abutments 1 and the piers 2, the girder body includes a pier top girder section group, a side girder section group and a mid-span girder section group arranged in a length direction of the fabricated composite girder bridge, the pier top girder section group includes four pier top girder sections 3 arranged in a width direction of the fabricated composite girder bridge, the side girder section group includes four side girder sections 4 arranged in the width direction of the fabricated composite girder bridge, the mid-span girder section group includes four mid-span girder sections 5 arranged in the width direction of the fabricated composite girder bridge, wherein the middle position of the pier top beam section 3 along the length direction is supported on the piers 2, one end of the boundary beam section 4 is supported on the abutment 1, the other end is fixedly connected with one end of the pier top beam section 3, the midspan beam section 5 is positioned between the two piers 2, and the two ends of the span middle beam section 5 are respectively and fixedly connected with the end parts of the two adjacent pier top beam sections 3.
In this embodiment, the span size of the fabricated composite girder bridge is within a range of 50 meters to 60 meters, the fabricated composite girder bridge has three spans, and the span sizes are all equal. Each beam section is arranged according to the bending moment distribution of the assembled composite beam bridge under the constant load, as shown in fig. 1, the maximum value of the length of each beam section is smaller than the maximum value of each span in the assembled composite beam bridge. Compared with the bridge structure erected through the whole hole in the prior art, the length of each beam section in the assembled combined beam bridge in the embodiment can be reduced by arranging the beam sections, so that the maximum value of the length of each beam section is smaller than the maximum value of each span in the assembled combined beam bridge, the length of each beam section is reduced, the transportation difficulty of each beam section is reduced, and the stability of each beam section in the erecting process is further improved. A span here means between two adjacent piers 2 or between an adjacent pier 2 and an abutment 1.
In this embodiment, as shown in fig. 1, each beam section of the fabricated composite beam bridge satisfies that the length dimension of the side beam section 4 is within a range of 38 meters to 43 meters, the length dimension of the pier top beam section 3 is within a range of 27 meters to 32 meters, and the length dimension of the mid-span beam section 5 is within a range of 24 meters to 29 meters, so that the absolute value of the bending moment applied to the connection portion between the beam sections is smaller than the absolute value of the maximum bending moment applied to the mid-span in which the connection portion is located, thereby prolonging the service life of the whole fabricated composite beam bridge.
In this embodiment, the middle position of the pier top beam section 3 in the length direction is supported on the pier 2, one end of the pier top beam section 3 is connected with the side beam section 4, the other end of the pier top beam section is connected with the span-middle beam section 5, the two sides of the pier top beam section 3 at the center position are stressed asymmetrically in terms of bending moment, the absolute value of the bending moment at one of the two ends of the pier top beam section 3 is the minimum value of the absolute value of the bending moment in the span-middle of the connection position, the absolute value of the bending moment at the other connection position is close to the minimum value of the absolute value of the bending moment in the span-middle of the connection position, and both the two minimum values are 0. In other embodiments, when the assembled composite beam bridge is subjected to positive bending moment or negative bending moment as a whole, the two minimum values are not 0.
In this embodiment, as shown in fig. 2 to 5, each beam section is a T-beam section, and the T-beam section includes a top plate, a bottom plate, and a corrugated steel web 13 connected between the top plate and the bottom plate.
As shown in fig. 2 and 3, the bottom plate of the pier top beam section 3 is a steel-concrete bottom plate 6, the steel-concrete bottom plate 6 comprises a bottom steel flange plate 7 in a U-shaped structure and concrete poured in the bottom steel flange plate 7, and the steel-concrete bottom plate 6 with the structure can avoid the use of a bottom template, thereby simplifying the manufacturing process of the bottom plate in the pier top beam section 3. The shear key 8 is welded in the bottom steel flange plate 7, the reinforcing steel bars are bound on the shear key 8, the bottom steel flange plate 7 can be connected with concrete better by the arrangement of the shear key 8 and the reinforcing steel bars, so that the compressive strength of the steel-concrete bottom plate 6 is improved, and the structural stability of the pier top beam section 3 in the erecting process can be improved.
As shown in fig. 2, 3 and 10, the top plate of the pier top beam section 3 is a steel-concrete top plate 9, the steel-concrete top plate 9 comprises a top steel flange plate and concrete poured together with the top steel flange plate in a formwork, the top steel flange plate is a top flat steel plate 10, a shear key 8 is welded on the top flat steel plate, and a transverse steel bar 11 and a longitudinal steel bar 12 are bound on the shear key 8 to improve the tensile strength of the steel-concrete top plate 9.
As shown in fig. 2 and 3, in the pier top beam section 3, the corrugated steel web 13 is an i-shaped structure, and the top and the bottom of the corrugated steel web are fixed on the steel-concrete top plate 9 and the steel-concrete bottom plate 6 through shear keys 8 respectively, so as to realize the fixed connection of the steel-concrete top plate 9 and the steel-concrete bottom plate 6.
In this embodiment, the top plate of the side beam section 4 and the top plate of the middle beam section 5 are both the same as the top plate of the pier top beam section 3, the bottom plate of the side beam section 4 is the same as the bottom plate of the middle beam section 5, the fixing connection mode of the corrugated steel web 13 and the top and bottom plates in the side beam section 4 is the same as the fixing mode of the corrugated steel web 13 and the top and bottom plates in the middle beam section 5, and only the bottom plate structure of the side beam section 4 and the fixing connection mode of the corrugated steel web 13 and the top and bottom plates in the side beam section 4 are described here. As shown in fig. 4 and 5, the bottom plate of the edge beam section 4 is a bottom flat steel plate 22, the thickness of the bottom flat steel plate 22 is greater than that of the bottom steel flange plate 7, the bottom flat steel plate 22 is welded to the bottom of the corrugated steel web 13, and the top of the corrugated steel web 13 is welded to the top plate of the edge beam section 4, so as to fixedly connect the corrugated steel web 13 in the edge beam section 4 and the midspan beam section 5 to the top plate of each beam section and the bottom flat steel plate 22.
In this embodiment, two types of T beam sections are provided in each beam section group, and transverse reinforcing bars 11 are provided in the top plate of one type of T beam section and extend outwards along both sides of the assembled composite beam bridge in the width direction, as shown in fig. 2 and 4; in the top plate of another T-beam section, only one side in the width direction of the fabricated composite beam bridge is provided with a transverse steel bar 11 extending outward, as shown in fig. 3 and 5, the transverse steel bar 11 is used for being fixedly connected with the transverse steel bar 11 between two adjacent T-beam sections in the same beam section group.
In the embodiment, as shown in fig. 2 and 3, the prestressed steel bundles 14 are arranged in the top plate of the pier top beam section 3 by a pretensioning method to improve the tensile strength of the top plate of the pier top beam section 3, the prestressed steel bundles 14 arranged by the pretensioning method can be carried out in a prefabrication factory, anchors can be recycled to save beam section prefabrication materials and simplify the manufacturing process of the top plate, and the prestressed steel bundles 14 are not arranged in the top plates of the span middle beam section 5 and the side beam section 4.
In this embodiment, as shown in fig. 7 to 11, two adjacent beam sections arranged along the length direction of the fabricated composite beam bridge are used for supporting and pre-positioning through a hanger 20, so as to facilitate the fixed connection between the two adjacent beam sections, the longitudinal steel bars 12 in the top plates of the two adjacent beam sections are welded together, a longitudinal wet joint 16 is arranged at the welding position, and the corrugated steel web 13 and the bottom plate of the two adjacent beam sections are welded to realize the fixed connection between the two adjacent beam sections. The transverse reinforcing steel bars 11 in two adjacent beam sections in the same beam section group are welded together, and a transverse wet joint 15 is arranged at the welding position to realize the fixed connection between the beam sections in the same beam section group.
In this embodiment, as shown in fig. 9 and 11, a transverse partition 17 is disposed between two beam segments in the same beam segment group, and the transverse partition 17 is arranged in a cross manner and fixed on the corresponding bottom plate or top plate through a node plate 21. As shown in fig. 9 and 12, a cross beam 18 is provided within the top pier section 3 directly above the top of the pier, and a manhole 19 is provided in the cross beam 18 to facilitate passage of an assembly worker.
The construction method of the assembled composite beam bridge is as follows:
(1) prefabricating each beam section, erecting a pier top beam section 3 in the length direction of the assembled combined beam bridge, erecting a span middle beam section 4 and a side beam section 5, and pouring a longitudinal wet joint between two adjacent beam sections to form a longitudinal beam bridge group along the length direction of the assembled combined beam bridge.
Specifically, as shown in fig. 2 and 3, in the process of prefabricating the steel-concrete bottom plate 6 in the pier top beam section 3, the shear keys 8 are welded in the bottom steel flange plate 7 of the U-shaped structure, steel bars are bound on the shear keys 8, and concrete is poured into the bottom steel flange plate 7 to complete the prefabrication of the steel-concrete bottom plate 6. In the prefabrication process, the shear keys 8 and the reinforcing steel bars can realize better fixed connection between the concrete and the bottom steel flange plate 7.
As shown in fig. 2 and 3, in the process of prefabricating the steel-concrete roof plate 9 in the pier top beam section 3, the shear keys 8 are welded on the top flat steel plate 10, the transverse steel bars 11 and the longitudinal steel bars 12 are bound on the shear keys 8, the prestressed steel bundles 14 are arranged, the prestressed steel bundles 14 are tensioned by adopting a pretensioning method, then concrete is poured on the top flat steel plate 10 through a template to complete the prefabrication of the steel-concrete roof plate 9, the method of tensioning the prestressed steel bundles 14 by adopting the pretensioning method can be completed in a prefabrication factory, anchorage devices can be recycled, the prefabricated material of the beam section is saved, and the prefabrication process of the steel-concrete roof plate 9 is simplified.
The top and the bottom of the corrugated steel web 13 are respectively fixed on the steel-concrete top plate 9 and the steel-concrete bottom plate 6 through the shear keys 8 to realize the prefabrication of the pier top beam section 3.
As shown in fig. 4 and 5, during the prefabrication process of the edge beam section 4 and the mid-span beam section 5, the top plate of the edge beam section 4 and the top plate of the mid-span beam section 5 are not provided with prestressed steel bundles, only are the transverse steel bars 11 and the longitudinal steel bars 12 arranged, and then concrete is poured onto the top flat steel plate 10 through the formwork, so that the prefabrication of the top plates in the two sets of beam sections is completed. The bottom plate of the side beam section 4 and the bottom plate of the span-middle beam section 5 are both bottom flat steel plates 22, the bottom flat steel plates 22 are welded with the bottoms of the corrugated steel webs 13, and the tops of the corrugated steel webs 13 are welded with the top plate in the same beam section, so that prefabrication of the whole side beam section 4 and the span-middle beam section 5 is achieved.
As shown in fig. 6, erecting a bridge pier 2 and a bridge abutment 1, transporting each prefabricated beam section to a bridge pier construction site, erecting a pier top beam section 3 on the bridge pier, then erecting an edge beam section 5 and a span-middle beam section 4, in the process of erecting the edge beam section 5 and the span-middle beam section 4, as shown in fig. 7, 8 and 10, realizing pre-positioning between two adjacent beam sections through a hanger 20, welding longitudinal steel bars 12 between two adjacent beam sections, and then pouring a longitudinal wet joint 16 between two adjacent beam sections to form a longitudinal beam bridge group along the bridge length direction.
(2) And erecting adjacent longitudinal beam bridge groups in the width direction of the assembled combined beam bridge until all the longitudinal beam bridge groups are erected, and then connecting transverse wet joints among the longitudinal beam bridge groups in the width direction of the assembled combined beam bridge.
Specifically, as shown in fig. 9 and 11, the rest longitudinal beam bridge groups are erected, the transverse reinforcing steel bars 11 on two adjacent beam sections are welded in the width direction of the fabricated composite beam bridge, and the transverse wet joints 15 are poured, so that the beam sections on the composite beam bridge in the width direction of the composite beam bridge are fixedly connected.
And finally, arranging a transverse partition plate 17 between two adjacent beam sections of the same beam section group, and fixing the transverse partition plate 17 on a bottom plate or a top plate of the corresponding beam section through a gusset plate 21, as shown in fig. 11 and 12, arranging a cross beam 18 in the pier top beam section group and right above the pier 2, and arranging a manhole 19 on the cross beam 18 so as to be convenient for an assembly worker to pass through, thereby completing the construction of the whole combined beam bridge.
In the embodiment, the pier top beam section 3 is erected firstly, and then the side beam section 4 and the midspan beam section 5 are erected, so that the construction period of the whole combined beam bridge can be shortened, and the structural stability in the erection process of the combined beam bridge is improved; and the maximum value of the length of the beam section in each beam section in the assembled combined beam bridge is smaller than the maximum value of the span length, so that compared with a bridge structure erected through a whole hole in the prior art, the assembled combined beam bridge has the advantages that the length of the beam section can be reduced, and the transportation difficulty of the beam section is reduced.
it differs from example 1 in that: the bottom plate of the pier top beam section can be made of a material which is not a steel-concrete bottom plate, the bottom plate of the pier top beam section is the same as that of the side beam section, but is thicker than that of the side beam section so as to meet the requirement that the bottom plate of the pier top beam section has higher compressive strength and meet the design requirement of the assembled composite beam bridge, and the bottom plate with the structure can simplify the construction process of the pier top beam section and shorten the manufacturing time of the pier top beam section; or the bottom plate of the side beam section and the bottom plate of the mid-span beam section are both the same as the bottom plate of the pier top beam section in structure, namely the bottom plates of the side beam section and the mid-span beam section are both steel-concrete bottom plates so as to increase the strength of the side beam section and the mid-span beam section.
it differs from example 1 in that: the steel-concrete bottom plate of the pier top beam section is not internally provided with a shear key, the bottom steel flange plate is internally welded with reinforcing steel bars, and the concrete and the bottom steel flange plate are better connected together through the reinforcing steel bars so as to improve the compressive strength of the steel-concrete bottom plate and further improve the structural stability of the pier top beam section in the erecting process.
it differs from example 1 in that: in the pier top beam section, the prestressed steel bundles can be arranged in the reinforced concrete top plate through a post-tensioning method so as to improve the tensile strength of the top plate in the pier top beam section.
Embodiment 5 of fabricated composite girder bridge of the present invention:
it differs from example 1 in that: the corrugated steel webs of the two adjacent beam sections are connected through bolts, so that the connecting strength between the two adjacent beam sections is improved.
it differs from example 1 in that: the assembled combined beam bridge can be erected by a full-hall method, and temporary supports are arranged between two adjacent piers or between the piers and abutment platforms to support each beam section.
it differs from example 1 in that: the assembled composite beam bridge has the advantages that the bridge body is formed by splicing pier top beam sections, side beam sections and span middle beam sections which are arranged along the length direction of the bridge, all the beam sections are box beams, the erection process can be simplified, and only one longitudinal beam bridge group needs to be erected along the length direction of the bridge.
it differs from example 1 in that: the number of the piers is three, and five T beam sections in the same beam section group are arranged to increase the bridge length and the bridge width. In other embodiments, the number of piers may be four, five, or six or more according to the length of the composite girder bridge, and the number of T girder segments in the same girder segment group may be two, three, six, or seven or more according to the width of the composite girder bridge.
it differs from example 1 in that: the bridge pier of the assembled combined beam bridge is provided with three bridge piers, under the constant load effect, stress and bending moment distribution on a pier top beam section on the bridge pier at the middle position are symmetrically arranged around the center of the bridge pier, so that bending moments at connecting positions at two ends of the pier top beam section are equal, the absolute value of the bending moment at the connecting positions at the two ends of the pier top beam section is the minimum value of the absolute value of the bending moment in the span of the connecting position, and the minimum value is 0.
In other embodiments, when the fabricated composite girder bridge is subjected to negative bending moment as a whole, the minimum value of the absolute value of the bending moment in the span where each connection portion is located is not 0.
it differs from example 1 in that: the bending moments at the connecting positions of the two ends of the pier top beam section are unequal, the absolute values of the bending moments at the two connecting positions are close to the minimum value of the absolute values of the bending moments in the span where the corresponding connecting positions are located, and the two minimum values are both 0.
In other embodiments, the two minima are not equal, and neither is 0.
it differs from example 1 in that: the total span of the assembled combined beam bridge is less than 50 meters, and the span range of each corresponding beam section is reduced compared with that of embodiment 1.
it differs from example 1 in that: the span size of the edge beam section of the assembled composite beam bridge is smaller than that of the middle beam section.
The invention relates to a construction method of an assembled type combined beam bridge, which comprises the following specific implementation modes:
specific example 1: the specific steps of the construction method of the fabricated composite beam bridge are the same as those of the construction method described in the above specific embodiment of the fabricated composite beam bridge, and are not described herein again.
The concrete embodiment 2 of the construction method of the assembled composite beam bridge of the invention:
it differs from example 1 in that: when the beam body of the assembled composite beam bridge is formed by splicing pier top beam sections, side beam sections and span middle beam sections which are arranged along the length direction of the bridge, and each beam section is a box beam, only a group of longitudinal beam bridge groups need to be erected in the construction process of the assembled composite beam bridge.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. An assembled combined beam bridge, which comprises bridge abutments and bridge piers, wherein at least two bridge piers are arranged, and is characterized in that,
the assembled combined beam bridge also comprises a beam body, wherein the beam body comprises a pier top beam section group, a side beam section group and a mid-span beam section group which are arranged along the length direction of the assembled combined beam bridge, the pier top beam section group comprises at least two pier top beam sections which are arranged along the width direction of the assembled combined beam bridge, the side beam section group comprises at least two side beam sections which are arranged along the width direction of the assembled combined beam bridge, and the mid-span beam section group comprises at least two mid-span beam sections which are arranged along the width direction of the assembled combined beam bridge;
or the assembled combined beam bridge also comprises a beam body which is formed by splicing pier top beam sections, side beam sections and mid-span beam sections which are arranged along the length direction of the assembled combined beam bridge;
the middle of the pier top beam section is supported on a pier, and two ends of the pier top beam section are suspended on two sides of the pier;
one end of the side beam section is fixedly supported on the abutment, and the other end of the side beam section is fixedly connected with the pier top beam section;
the middle-span beam section is positioned between two adjacent piers, and two ends of the middle-span beam section are fixedly connected with the pier top beam section respectively;
the maximum value of the length of the beam section in each beam section is smaller than the maximum value of each span in the assembled combined beam bridge.
2. The fabricated composite girder bridge of claim 1, wherein each of the girder segments is a T-girder segment, each of the T-girder segments comprising a top plate, a bottom plate, and a corrugated steel web connected between the top plate and the bottom plate.
3. The fabricated composite girder bridge according to claim 2, wherein the bottom plate of the pier top girder section is a steel-concrete bottom plate including a bottom steel flange plate having a U-shaped structure and concrete poured therein.
4. The fabricated composite girder bridge according to claim 3, wherein shear keys are provided in the bottom steel flange plates of the U-shaped structures.
5. The fabricated composite girder bridge according to claim 2, wherein the top plate of the pier-top girder section is a steel-concrete top plate, and the steel-concrete top plate is provided with the prestressed steel bundles therein.
6. The fabricated composite girder bridge according to claim 5, wherein the prestressed steel strands are installed in the steel-concrete roof panel by a pre-tensioning method.
7. The fabricated composite girder bridge according to any one of claims 1 to 6, wherein the absolute value of the bending moment applied to the connection portion of at least one of the both ends of the pier top beam section is equal to the minimum value of the absolute value of the bending moment in the span in which the connection portion is located.
8. The fabricated composite girder bridge according to any one of claims 1 to 6, wherein the span range of the fabricated composite girder bridge is 50-60 m, and the span ranges of the side girder segment, the pier top girder segment and the span center girder segment are 38-43 m, 27-32 m and 24-29 m, respectively.
9. The fabricated composite girder bridge according to any one of claims 1 to 6, wherein the spans of the fabricated composite girder bridge are equal.
10. A construction method of an assembled type combined beam bridge is characterized in that,
erecting pier top beam sections in the length direction of the assembled combined beam bridge, erecting span middle beam sections and side beam sections, and pouring longitudinal wet joints between two adjacent beam sections to form a longitudinal beam bridge group along the length direction of the bridge;
or in the length direction of the assembled composite beam bridge, firstly erecting pier top beam sections, then erecting span middle beam sections and side beam sections, pouring longitudinal wet joints between two adjacent beam sections to form longitudinal beam bridge groups along the bridge length direction, then erecting adjacent longitudinal beam bridge groups in the width direction of the assembled composite beam bridge until all the longitudinal beam bridge groups are erected, and in the width direction of the assembled composite beam bridge, connecting transverse wet joints between the longitudinal beam bridge groups;
in the process of erecting the longitudinal beam bridge group, pre-positioning two adjacent beam sections in the length direction of the assembled combined beam bridge through a hanger;
the middle of each beam section is supported on the pier, the two ends of each beam section are suspended on the two sides of the pier, one end of each side beam section is supported on the abutment, the other end of each side beam section is fixedly connected with the corresponding pier top beam section, the two ends of each span middle beam section are fixedly connected with the corresponding pier top beam section, and the maximum length of each beam section middle beam section is smaller than the maximum length of the span middle of the assembled combined beam bridge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911358571.1A CN111005301A (en) | 2019-12-25 | 2019-12-25 | Assembled combined beam bridge and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911358571.1A CN111005301A (en) | 2019-12-25 | 2019-12-25 | Assembled combined beam bridge and construction method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111005301A true CN111005301A (en) | 2020-04-14 |
Family
ID=70118538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911358571.1A Pending CN111005301A (en) | 2019-12-25 | 2019-12-25 | Assembled combined beam bridge and construction method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111005301A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319717A (en) * | 2020-09-30 | 2022-04-12 | 华中科技大学 | Prefabricated assembled steel-concrete composite beam |
-
2019
- 2019-12-25 CN CN201911358571.1A patent/CN111005301A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114319717A (en) * | 2020-09-30 | 2022-04-12 | 华中科技大学 | Prefabricated assembled steel-concrete composite beam |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109338866B (en) | Ultra-light combined beam structure suitable for large-span bridge and construction method thereof | |
| CN106906748B (en) | Based on the construction method for mixing prestressed assembled corrugated steel web plate composite box girder | |
| CN113481826B (en) | Prefabricated assembled corrugated steel web plate combined box girder | |
| JP2003268719A (en) | Steel-concrete composite beam and its installation method | |
| CN109958049B (en) | Modular steel-concrete combined small box girder simply-supported continuous bridge and construction method thereof | |
| KR100540374B1 (en) | Bridge construction method using precast prestressed concrete beam manufacturing method for straight and curved bridge | |
| CN110656566A (en) | Assembled combined box girder and construction method thereof | |
| CN110924287A (en) | Semi-fabricated large-span combined box girder and construction method thereof | |
| KR101913069B1 (en) | Prestressed Steel-Concrete Composite Girder and Method for Fabricating thereof | |
| CA2023198C (en) | Composite girder construction and method of making same | |
| CN111206488A (en) | Large-span widened corrugated web steel box-concrete continuous beam bridge and construction method | |
| CN108221636B (en) | Steel-concrete composite beam bridge constructed by adopting bracket-free scheme for midspan and bridge forming method | |
| CN111472258A (en) | Large-span suspension bridge GFRP rib precast slab combined beam bridge deck system and construction method thereof | |
| CN211772741U (en) | Large-span variable-width corrugated web steel box-concrete continuous beam bridge | |
| JP2001329510A (en) | Precast segment and forming method for bridge girder using it | |
| CN111005301A (en) | Assembled combined beam bridge and construction method thereof | |
| KR101209674B1 (en) | The site built-up hybrid girder which is prestressed by gap difference of connection face of blocks | |
| US5966764A (en) | Roll beam girder system for bridges | |
| CN211772737U (en) | Assembled combination beam bridge | |
| KR20130090709A (en) | Construction method for corrugated steel plate web-psc composite beam | |
| CN214328474U (en) | Prestressed V-shaped truss steel-concrete composite structure bridge | |
| CN115287996A (en) | Pier top UHPC-NC combined structure UHPC continuous box girder bridge and construction method thereof | |
| CN113106845A (en) | Assembled tie bar rectangular steel tube concrete truss composite beam and construction method thereof | |
| JP2007046277A (en) | Bridge girder installing method | |
| KR101693266B1 (en) | Hybrid girder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |