CN210481999U - Hidden arch foot structure of a long-span beam-arch composite system bridge - Google Patents
Hidden arch foot structure of a long-span beam-arch composite system bridge Download PDFInfo
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- CN210481999U CN210481999U CN201921208357.3U CN201921208357U CN210481999U CN 210481999 U CN210481999 U CN 210481999U CN 201921208357 U CN201921208357 U CN 201921208357U CN 210481999 U CN210481999 U CN 210481999U
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- 239000002131 composite material Substances 0.000 title claims 11
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 354
- 239000010959 steel Substances 0.000 claims abstract description 354
- 230000007246 mechanism Effects 0.000 claims abstract description 64
- 239000004567 concrete Substances 0.000 claims abstract description 19
- 238000004873 anchoring Methods 0.000 claims description 25
- 238000010276 construction Methods 0.000 abstract description 26
- 230000000694 effects Effects 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011150 reinforced concrete Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000011148 porous material Substances 0.000 description 1
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Abstract
本实用新型公开了一种大跨径梁拱组合体系桥梁隐拱脚构造，包括布设于所施工桥梁主梁内的拱脚预埋构造；所施工桥梁包括主梁和布设于主梁上的主拱，主拱包括内拱、外拱和多个拱间连接杆，内拱和外拱均为钢管混凝土拱；拱脚预埋构造包括两个对称布设于主拱前后两侧下方的拱脚预埋机构，拱脚预埋结构包括预埋钢板、下预埋拱脚钢管、上预埋拱脚钢管和多个锚固件。本实用新型在主拱的前后两侧下方分别设置拱脚预埋机构，并将拱脚预埋机构预埋于主梁内，实现将主拱拱脚下沉并预埋至主梁内的目的，既能实现主拱与主梁之间有效连接，保证桥梁整体结构的安全性，并且能简化主拱拱脚与主梁之间的连接过程，大幅度提高施工效率，同时具有良好的景观效果。
The utility model discloses a large-span beam-arch combined system bridge hidden arch foot structure, which comprises an arch foot pre-embedded structure arranged in the main beam of the bridge to be constructed; the constructed bridge comprises a main beam and a main beam arranged on the main beam. The main arch includes an inner arch, an outer arch and a plurality of inter-arch connecting rods, and the inner arch and the outer arch are both concrete-filled steel tubular arches; Embedding mechanism, the pre-embedded structure of the arch foot includes the pre-embedded steel plate, the lower pre-buried arch foot steel pipe, the upper pre-buried arch foot steel pipe and a plurality of anchors. In the utility model, an arch foot pre-embedding mechanism is respectively arranged under the front and rear sides of the main arch, and the arch foot pre-embedding mechanism is pre-buried in the main beam, so as to realize the purpose of sinking and pre-embedding the arch foot of the main arch into the main beam. It can not only realize the effective connection between the main arch and the main beam, ensure the safety of the overall structure of the bridge, but also simplify the connection process between the main arch and the main beam, greatly improve the construction efficiency, and have a good landscape effect.
Description
Technical Field
The utility model belongs to the technical field of the bridge construction, especially, relate to a long span beam encircles latent arch foot structure of combination system bridge.
Background
The large-span bridge is also called a large-span bridge or a large-span bridge, and the large-span bridge refers to a bridge with a porous span total length of more than or equal to 100 meters or a single-pore span of more than or equal to 40 meters. The bridge span is also called bridge span, generally refers to the total span of the bridge, and the total span refers to the sum of net spans of all holes in the porous bridge. The total length of the porous span refers to the total length of the bridge, namely the total length of the bridge girder. The combined system bridge refers to a bridge formed by combining two independent structural systems by using main bearing components, such as combination of an arch and a beam, combination of a beam and a truss, combination of a suspension cable and a beam and the like. The beam-arch combined system bridge is a bridge formed by combining two independent structural systems of an arch and a beam as main bearing components. The beam-arch combined system bridge is developed rapidly in China in recent years, and is widely applied to road construction due to the characteristics of reasonable stress, low manufacturing cost, simple and convenient construction, attractive appearance and the like. Nowadays, the application of a beam-arch combined system bridge in actual engineering is increasing, a beam in a beam-arch combined system of the beam-arch combined system bridge refers to a main beam of the bridge, an arch refers to a main arch of the bridge, and the construction of a joint between the main beam and the main arch is of great importance. At present, when the arch springing of the main arch is fixed on the main beam in a beam-arch combination system, the connection node between the arch springing and the main beam is generally required to be arranged on the bridge floor above the main beam, the connection node between the arch springing and the main beam (namely the connection structure of the arch springing) occupies a large space, which can not avoid adverse effects on the passage of the bridge floor, and when the connection node between the arch springing and the main beam is constructed, in order to stably and reliably connect the arch springing and the main beam, a reinforced concrete connection structure is required to be arranged on the bridge floor, which not only occupies a large space, but also has the problems of difficult construction, large construction difficulty, slow construction speed, difficult control of construction quality and the like, and meanwhile, the molded reinforced concrete connection structure seriously affects the impression effect of the bridge, and has the defects of poor landscape effect and the.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem lie in not enough to among the above-mentioned prior art, a long span beam arch combination system bridge hidden arch foot structure is provided, a structure is simple, reasonable in design and construction are simple and convenient, excellent in use effect, both sides below sets up arch foot pre-buried mechanism respectively around the main arch, and with arch foot pre-buried mechanism pre-buried in the girder, realize with the main arch foot sink and pre-buried purpose to the girder in, can realize effectively being connected between main arch and the girder, guarantee bridge overall structure's security, and can simplify the connection process between main arch foot and the girder, construction efficiency is greatly improved, good view effect has simultaneously.
In order to solve the technical problem, the utility model discloses a technical scheme is: the utility model provides a long span beam-arch combination system bridge hides hunch foot structure which characterized in that: the construction method comprises an arch foot embedded structure arranged in a main beam of a constructed bridge;
the constructed bridge is a large-span beam-arch combined system bridge with a main beam length larger than 100m, the large-span beam-arch combined system bridge comprises a main beam and a main arch arranged on the main beam, and the main beam is a concrete beam; the main arch comprises a left main arch ring and a right main arch ring which are symmetrically arranged, each main arch ring comprises an inner arch, an outer arch arranged on the outer side of the inner arch and a plurality of inter-arch connecting rods connected between the inner arch and the outer arch, the inner arch and the outer arch are arranged along the longitudinal bridge direction, the inter-arch connecting rods are straight rods, and the plurality of inter-arch connecting rods are arranged from front to back along the outer contour line of the inner arch; the inner arch and the outer arch have the same structure and are both steel pipe concrete arches; the inner arch and the outer arch in each main arch ring are arranged on the same vertical plane and are arranged along the longitudinal bridge direction, and the rise of the inner arch is smaller than that of the outer arch; the steel pipe concrete arch comprises an arch-shaped steel pipe and a concrete filling structure formed by pouring concrete filled in the arch-shaped steel pipe, and the cross section of the arch-shaped steel pipe is circular; the arched steel pipe of the inner arch is an inner steel pipe, and the arched steel pipe of the outer arch is an outer steel pipe;
the arch springpre-buried structure is arranged right below the main arch, and the main arch and the arch springpre-buried structure arranged right below the main arch are connected to form an arch springpre-buried main arch; the arch foot pre-embedding structure comprises two arch foot pre-embedding mechanisms, and the two arch foot pre-embedding mechanisms are symmetrically arranged below the front side and the rear side of the main arch; each arch foot pre-buried mechanism comprises two arch foot pre-buried structures which are symmetrically arranged at the left and right, each arch foot pre-buried structure is positioned under one main arch ring, and each arch foot pre-buried structure is fixedly connected with the main arch ring positioned over the arch foot pre-buried structure into a whole;
the arch springpre-buried structure comprises a pre-buried steel plate, a lower pre-buried arch springing steel pipe fixed on the pre-buried steel plate, an upper pre-buried arch springing steel pipe positioned right above the lower pre-buried arch springing steel pipe and a plurality of anchoring parts fixed at the bottom of the pre-buried steel plate, wherein the pre-buried steel plate, the lower pre-buried arch springing steel pipe and the upper pre-buried arch springing steel pipe are uniformly distributed on the same vertical surface; the embedded steel plate is a straight steel plate, the lower embedded arch springing steel pipe, the upper embedded arch springing steel pipe and the plurality of anchoring pieces are arranged in parallel, and the lower embedded arch springing steel pipe, the upper embedded arch springing steel pipe and the plurality of anchoring pieces are arranged vertically to the embedded steel plate; the lower pre-buried arch springing steel pipe and the upper pre-buried arch springing steel pipe are both positioned above the pre-buried steel plate in an inclined mode, the cross sections of the lower pre-buried arch springing steel pipe and the upper pre-buried arch springing steel pipe are both circular, the bottoms of the lower pre-buried arch springing steel pipe and the upper pre-buried arch springing steel pipe are both fixed on the pre-buried steel plate, and the top ends of the anchoring pieces are; the lower embedded arch springing steel pipe, the upper embedded arch springing steel pipe and the plurality of anchoring pieces are all poured in the main beam; the lower embedded arch springing steel pipe and the upper embedded arch springing steel pipe are arranged on the same vertical plane with the main arch ring positioned right above the lower embedded arch springing steel pipe and the upper embedded arch springing steel pipe;
the two arch foot pre-embedding mechanisms are respectively a front arch foot pre-embedding mechanism arranged below the front side of the main arch and a rear arch foot pre-embedding mechanism arranged below the rear side of the main arch, a pre-embedded steel plate in the front arch foot pre-embedding mechanism gradually inclines downwards from front to rear, and a pre-embedded steel plate in the rear arch foot pre-embedding mechanism gradually inclines upwards from front to rear;
the cross section size of the inner steel pipe in the arch springing pre-embedded main arch is the same as that of the lower pre-embedded arch springing steel pipe, and the cross section size of the outer steel pipe is the same as that of the upper pre-embedded arch springing steel pipe; the front end of the inner steel pipe is connected with the upper end of a lower pre-buried arch springing steel pipe in the front side arch springing pre-buried mechanism, the rear end of the inner steel pipe is connected with the upper end of the lower pre-buried arch springing steel pipe in the rear side arch springing pre-buried mechanism, the inner steel pipe is communicated with the interior of the lower pre-buried arch springing steel pipe which is positioned right below the front end and the rear end of the inner steel pipe, and the inner steel pipe, the front end and the rear end of the inner steel; the front end of the outer steel pipe is connected with the upper end of an upper pre-buried arch springing steel pipe in the front arch springing pre-buried mechanism, the rear end of the outer steel pipe is connected with the upper end of an upper pre-buried arch springing steel pipe in the rear arch springing pre-buried mechanism, the outer steel pipe is communicated with the interior of an upper pre-buried arch springing steel pipe located right below the front end and the rear end of the outer steel pipe, and the outer steel pipe, the upper pre-buried springing steel pipe and the upper pre.
The hidden arch foot structure of the bridge of the long-span beam arch combined system is characterized in that: the lower pre-buried arch springing steel pipe and the upper pre-buried arch springing steel pipe are both straight steel pipes, the lower pre-buried arch springing steel pipe of the front side arch springing pre-buried mechanism and the front end of the connected inner steel pipe are coaxially arranged, and the lower pre-buried arch springing steel pipe of the rear side arch springing pre-buried mechanism and the rear end of the connected inner steel pipe are coaxially arranged; the upper pre-buried arch springing steel pipe of the front side arch springing pre-buried mechanism and the front end of the connected outer steel pipe are coaxially arranged, and the upper pre-buried arch springing steel pipe of the rear side arch springing pre-buried mechanism and the rear end of the connected outer steel pipe are coaxially arranged.
The hidden arch foot structure of the bridge of the long-span beam arch combined system is characterized in that: the bottom of the lower pre-buried arch springing steel pipe and the bottom of the upper pre-buried arch springing steel pipe in the arch springing pre-buried structure are welded and fixed on the pre-buried steel plate.
The hidden arch foot structure of the bridge of the long-span beam arch combined system is characterized in that: the upper ends of the lower pre-buried arch springing steel pipe and the upper pre-buried arch springing steel pipe in the arch springing pre-buried structure extend out of the upper portion of the main beam.
The hidden arch foot structure of the bridge of the long-span beam arch combined system is characterized in that: the anchoring piece is an anchoring steel bar, and the anchoring steel bar is a straight steel bar; and the top ends of a plurality of anchoring parts in the arch springing embedded structure are welded and fixed on the embedded steel plate.
The hidden arch foot structure of the bridge of the long-span beam arch combined system is characterized in that: and a plurality of anchoring pieces in the arch springing embedded structure are distributed in multiple rows and multiple columns.
The hidden arch foot structure of the bridge of the long-span beam arch combined system is characterized in that: the arch springing embedded structure also comprises two spiral stirrups, and the bottoms of the two spiral stirrups are welded and fixed on the embedded steel plate; the lower embedded arch springing steel pipe and the upper embedded arch springing steel pipe are coaxially sleeved with one spiral stirrup, and the spiral stirrups are all poured in the main beam.
The hidden arch foot structure of the bridge of the long-span beam arch combined system is characterized in that: the lower pre-buried arch springing steel pipe and the upper pre-buried arch springing steel pipe in the arch springing pre-buried structure are both pre-buried steel pipes, a plurality of stiffening steel plates are uniformly distributed on the outer side of the bottom of each pre-buried steel pipe along the circumferential direction, the stiffening steel plates are welded and fixed on the outer side wall of the bottom of each pre-buried steel pipe, and the stiffening steel plates are buried in the main beam;
the plurality of stiffening steel plates are straight steel plates, the bottoms of the stiffening steel plates are welded and fixed on the embedded steel plates, and the plurality of stiffening steel plates are vertically arranged with the embedded steel plates; and the plurality of stiffening steel plates are vertically arranged with the embedded steel pipes arranged on the stiffening steel plates.
The hidden arch foot structure of the bridge of the long-span beam arch combined system is characterized in that: the number of the main arches is one or more, and the main arches are distributed from front to back along the longitudinal bridge direction; the main beam comprises two side-span beam sections and a main-span beam section connected between the two side-span beam sections, the main-span beam section is a single-hole beam or a porous beam, the single-hole beam is a main-span beam section, and the porous beam is formed by splicing a plurality of main-span beam sections arranged from front to back along the longitudinal bridge direction; the number of main span beam sections in the main span beam section is the same as that of main arches, each main span beam section is uniformly provided with one main arch, and each main arch is positioned right above one main span beam section;
the number of the arch foot embedded structures is the same as that of the main arches, one arch foot embedded structure is uniformly distributed under each main arch, and each main arch and the arch foot embedded structures distributed under the main arch form a connecting arch foot embedded type main arch.
The hidden arch foot structure of the bridge of the long-span beam arch combined system is characterized in that: the embedded steel plate is a rectangular steel plate.
Compared with the prior art, the utility model has the following advantage:
1. simple structure, reasonable in design and input construction cost are lower.
2. The construction is simple and convenient, the use effect is good, the practical value is high, the arch foot pre-embedding mechanisms are respectively arranged below the front side and the rear side of the main arch, the arch foot pre-embedding mechanisms are pre-embedded in the girders, the purpose of sinking and pre-embedding the main arch feet into the girders is realized, the effective connection between the steel pipe arch (namely the main arch) and the girders can be realized, the safety of the whole bridge structure is ensured, the good landscape effect can be obtained, the problems of difficult construction, high construction difficulty, low construction speed, difficult control of construction quality and the like exist, meanwhile, the connection process between the main arch feet and the girders can be simplified, the construction efficiency is greatly improved, the bridge has the advantages of simple structure, reasonable design, convenient construction, high construction speed, good use effect and the like, and the defects that the reinforced concrete structure is required to be arranged on the bridge floor for the node between the traditional arch feet and the girders, the construction, Poor landscape effect and the like, and remarkable economic and social benefits.
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
Drawings
Fig. 1 is the longitudinal bridge of the front arch foot pre-embedded mechanism and the rear arch foot pre-embedded mechanism of the utility model is a schematic structural diagram.
Fig. 2 is the transverse bridge of the arch springing embedded structure of the utility model is a schematic structural diagram.
Fig. 3 is the structure schematic diagram after the construction of the utility model is completed.
Fig. 4 is a schematic view of the longitudinal bridge structure of the main arch of the present invention.
Fig. 5 is the layout position schematic diagram of the stiffening steel plate laid outside the bottom of the upper pre-embedded arch springing steel pipe of the utility model.
Description of reference numerals:
1-main beam; 1-a side span beam section;
1-2-main span beam segment; 2-inner arch; 3-outer arch;
4, pre-burying a steel plate; 5, embedding arch springing steel pipes downwards; 6, pre-burying an arch springing steel pipe;
7-anchoring elements; 8, a front arch springing embedding mechanism; 9-a rear arch springing pre-embedding mechanism;
10-main arch; 11-spiral stirrup; 12-stiffening steel plates;
13-inter-arch connecting rods; 14-a sling; 15-side pier;
16-middle pier.
Detailed Description
As shown in fig. 1, 2 and 3, the present invention includes an arch foot pre-buried structure arranged in a main beam 1 of a constructed bridge;
the constructed bridge is a large-span beam-arch combined system bridge with a main beam 1 of which the length is more than 100m, the large-span beam-arch combined system bridge comprises a main beam 1 and a main arch 10 arranged on the main beam 1, and the main beam 1 is a concrete beam; the main arch 10 comprises a left main arch ring and a right main arch ring which are symmetrically arranged, each main arch ring comprises an inner arch 2, an outer arch 3 arranged on the outer side of the inner arch 2 and a plurality of inter-arch connecting rods 13 connected between the inner arch 2 and the outer arch 3, the inner arch 2 and the outer arch 3 are arranged along the longitudinal bridge direction, the inter-arch connecting rods 13 are straight rods, and the plurality of inter-arch connecting rods 13 are arranged from front to back along the outer contour line of the inner arch 2; the inner arch 2 and the outer arch 3 have the same structure and are both steel pipe concrete arches; the inner arch 2 and the outer arch 3 in each main arch ring are arranged on the same vertical plane and are arranged along the longitudinal bridge direction, and the rise of the inner arch 2 is smaller than that of the outer arch 3; the steel pipe concrete arch comprises an arch-shaped steel pipe and a concrete filling structure formed by pouring concrete filled in the arch-shaped steel pipe, and the cross section of the arch-shaped steel pipe is circular; the arched steel pipes of the inner arches 2 are inner steel pipes, and the arched steel pipes of the outer arches 3 are outer steel pipes;
the arch foot pre-buried structure is arranged right below the main arch 10, and the main arch 10 is connected with the arch foot pre-buried structure arranged right below the main arch to form an arch foot pre-buried main arch; the arch foot pre-embedding structure comprises two arch foot pre-embedding mechanisms which are symmetrically arranged below the front side and the rear side of the main arch 10; each arch foot pre-buried mechanism comprises two arch foot pre-buried structures which are symmetrically arranged at the left and right, each arch foot pre-buried structure is positioned under one main arch ring, and each arch foot pre-buried structure is fixedly connected with the main arch ring positioned over the arch foot pre-buried structure into a whole;
the arch springpre-buried structure comprises a pre-buried steel plate 4, a lower pre-buried arch springing steel pipe 5 fixed on the pre-buried steel plate 4, an upper pre-buried arch springing steel pipe 6 positioned right above the lower pre-buried arch springing steel pipe 5 and a plurality of anchoring pieces 7 fixed at the bottom of the pre-buried steel plate 4, wherein the pre-buried steel plate 4, the lower pre-buried arch springing steel pipe 5 and the upper pre-buried arch springing steel pipe 6 are uniformly distributed on the same vertical surface; the embedded steel plate 4 is a straight steel plate, the lower embedded arch springing steel pipe 5, the upper embedded arch springing steel pipe 6 and the plurality of anchoring pieces 7 are arranged in parallel, and the lower embedded arch springing steel pipe 5, the upper embedded arch springing steel pipe 6 and the plurality of anchoring pieces 7 are arranged vertically to the embedded steel plate 4; the lower embedded arch springing steel pipe 5 and the upper embedded arch springing steel pipe 6 are positioned above the embedded steel plate 4 in an inclined manner, the cross sections of the lower embedded arch springing steel pipe 5 and the upper embedded arch springing steel pipe 6 are both circular, the bottoms of the lower embedded arch springing steel pipe and the upper embedded arch springing steel pipe are both fixed on the embedded steel plate 4, and the top ends of the anchoring pieces 7 are all fixed on the embedded steel plate 4; the lower embedded arch springing steel pipe 5, the upper embedded arch springing steel pipe 6 and the plurality of anchoring pieces 7 are all poured in the main beam 1; the lower embedded arch springing steel pipe 5 and the upper embedded arch springing steel pipe 6 and the main arch ring positioned right above the lower embedded arch springing steel pipe are arranged on the same vertical plane;
the two arch foot pre-embedding mechanisms are respectively a front arch foot pre-embedding mechanism 8 arranged below the front side of the main arch 10 and a rear arch foot pre-embedding mechanism 9 arranged below the rear side of the main arch 10, the pre-embedded steel plates 4 in the front arch foot pre-embedding mechanism 8 are gradually inclined downwards from front to rear, and the pre-embedded steel plates 4 in the rear arch foot pre-embedding mechanism 9 are gradually inclined upwards from front to rear;
the cross section size of the inner steel pipe in the arch springing pre-embedded main arch is the same as that of the lower pre-embedded arch springing steel pipe 5, and the cross section size of the outer steel pipe is the same as that of the upper pre-embedded arch springing steel pipe 6; the front end of the inner steel pipe is connected with the upper end of a lower pre-buried arch springing steel pipe 5 in a front side arch springing pre-buried mechanism 8, the rear end of the inner steel pipe is connected with the upper end of the lower pre-buried arch springing steel pipe 5 in a rear side arch springing pre-buried mechanism 9, the inner steel pipe is communicated with the interior of the lower pre-buried arch springing steel pipe 5 positioned right below the front end and the rear end of the inner steel pipe, and the inner steel pipe, the front end and the rear end of the inner steel pipe are; the front end of the outer steel pipe is connected with the upper end of an upper pre-buried arch springing steel pipe 6 in the front side arch springing pre-buried mechanism 8, the rear end of the outer steel pipe is connected with the upper end of the upper pre-buried arch springing steel pipe 6 in the rear side arch springing pre-buried mechanism 9, the outer steel pipe is communicated with the interior of the upper pre-buried arch springing steel pipe 6 located right below the front end and the rear end of the outer steel pipe, and the outer steel pipe, the upper pre-buried arch springing steel pipe and the.
During actual construction, two main arch rings in the main arch 10 are tightly connected through a transverse bridge connection mechanism.
As can be seen from the above, each inner steel pipe is connected with the lower pre-buried arch springing steel pipe 5 located right below the front and rear ends thereof to form one inner arched steel pipe, and each outer steel pipe is connected with the upper pre-buried arch springing steel pipe 6 located right below the front and rear ends thereof to form one outer arched steel pipe.
The rise of the inner arch 2 refers to the height difference of the inner arch 2 from the arch top to the arch springing (i.e. the vertical height of the arch top of the inner arch 2 to the arch springing thereof), and the rise of the outer arch 3 refers to the height difference from the arch top to the arch springing (i.e. the vertical height of the arch top of the inner arch 2 to the outer arch 3 thereof). And, the distance between the inner arch 2 and the outer arch 3 in the main arch 10 is the same from front to back along the longitudinal bridge direction.
For reliable connection, the inner arch 2 and the outer arch 3 are connected with the main beam 1 through two groups of left and right symmetrically arranged suspension ropes 14. Each group of the slings 14 comprises a plurality of slings 14 which are arranged from front to back along the longitudinal bridge direction, and the plurality of slings 14 are uniformly arranged.
In this embodiment, all carry out fixed connection with welding mode between the lower pre-buried arch springing steel pipe 5 and between outer steel pipe and the upper pre-buried arch springing steel pipe 6 between interior steel pipe, the actual connection is simple and convenient, reliable.
As shown in fig. 3 and 4, the main arch 10 and the arch foot embedded structure arranged right below the main arch are connected to form the arch foot embedded type main arch, the arch foot embedded structure is poured in the main beam 1, and the arch foot embedded structure is tightly connected with the main beam 1 into a whole, so that the arch feet of the inner arch 2 and the outer arch 3 in the main arch 10 are both tightly and reliably connected with the main beam 1, meanwhile, any connecting structure for connecting the arch feet of the main arch 10 and the main beam 1 is not required to be arranged on the bridge floor above the main beam 1, any space on the bridge floor above the main beam 1 is not required to be occupied, any adverse effect on the landscape effect of the constructed bridge is not caused, and any inconvenience is not brought to the passage of the bridge floor.
In this embodiment, the main beam 1 is a reinforced concrete box girder, and the arch foot embedded structure is poured in the main beam 1, so that the arch foot embedded structure and the main beam 1 are connected into a whole, the purpose of stably and firmly supporting the arch foot of the main arch 10 through the main beam 1 is achieved, the main arch 10 is more stable, the arch foot of the main arch 10 is stably and reliably connected with the main beam 1, and the integrity and the stress effect of the constructed bridge are ensured.
The pre-buried structure of arch springing comprises two the pre-buried mechanism of arch springing, every the simple structure and the reasonable in design of pre-buried mechanism of arch springing, pre-buried steel sheet 4 and anchor assembly 7 among the pre-buried mechanism of arch springing can fasten and pour in girder 1 and form reliable anchor structure, ensure the firm, reliable connection between arch springing and the girder 1 of main arch 10. The lower pre-embedded arch springing steel pipe 5 and the upper pre-embedded arch springing steel pipe 6 in the arch springing pre-embedded mechanism form pre-embedded arch springing of the main arch 10, the lower pre-embedded arch springing steel pipe 5 and the upper pre-embedded arch springing steel pipe 6 are connected with the anchoring structure into a whole and are poured in the main beam 1, meanwhile, the lower pre-embedded arch springing steel pipe 5 and the upper pre-embedded arch springing steel pipe 6 are simply, conveniently, quickly and reliably connected with the inner arch 2 and the outer arch 3 in the main arch 10, so that the arch springing of the main arch 10 is sunk and hidden in the main beam 1, and the hidden arch springing effect of the main arch 10 pre-embedded in the main beam 1 is achieved.
In order to ensure simple, quick and reliable connection between the inner arch 2 and the outer arch 3 in the main arch 10 and the lower pre-buried arch steel pipe 5 and the upper pre-buried arch steel pipe 6 in the arch springing pre-buried structure, in the embodiment, the lower pre-buried arch steel pipe 5 and the upper pre-buried arch steel pipe 6 are both straight steel pipes, the lower pre-buried arch steel pipe 5 of the front side arch springing pre-buried mechanism 8 and the front end of the connected inner steel pipe are coaxially arranged, and the lower pre-buried arch steel pipe 5 of the rear side arch springing pre-buried mechanism 9 and the rear end of the connected inner steel pipe are coaxially arranged; the upper pre-buried arch springing steel pipe 6 of the front side arch springing pre-buried mechanism 8 and the front end of the connected outer steel pipe are coaxially arranged, and the upper pre-buried arch springing steel pipe 6 of the rear side arch springing pre-buried mechanism 9 and the rear end of the connected outer steel pipe are coaxially arranged.
In this embodiment, the bottom of the lower pre-buried arch springing steel pipe 5 and the bottom of the upper pre-buried arch springing steel pipe 6 in the arch springing pre-buried structure are welded and fixed on the pre-buried steel plate 4.
In this embodiment, the stiffening steel plates 12 are rectangular steel plates.
In practice, the stiffening steel plate 12 may be a straight steel plate with other shapes, such as a regular hexagonal steel plate.
In order to enable the connection between the inner arch 2 and the outer arch 3 in the main arch 10 and the lower embedded arch steel pipe 5 and the upper embedded arch steel pipe 6 in the arch springing embedded structure to be simple and convenient, the upper ends of the lower embedded arch steel pipe 5 and the upper embedded arch steel pipe 6 in the arch springing embedded structure extend out to the upper side of the main beam 1.
In this embodiment, the anchoring member 7 is an anchoring steel bar, and the anchoring steel bar is a straight steel bar.
In practice, said anchoring element 7 can also be provided by other types of anchoring elements, such as screws, anchors, etc.
In this embodiment, a plurality of top ends of the anchoring members 7 in the arch springing embedded structure are all welded and fixed on the embedded steel plate 4. Therefore, the actual fixation is simple, convenient and reliable.
And, a plurality of anchor assembly 7 in the pre-buried structure of arch springing divide into the multirow multiseriate and lay, therefore can effectively ensure to be firmly fixed in girder 1 with the pre-buried structure of arch springing.
In the embodiment, in order to further ensure that the lower embedded arch springing steel pipe 5 and the upper embedded arch springing steel pipe 6 can be firmly and stably fixed in the main beam 1, the arch springing embedded structure further comprises two spiral stirrups 11, and the bottoms of the two spiral stirrups 11 are welded and fixed on the embedded steel plate 4; the lower embedded arch springing steel pipe 5 and the upper embedded arch springing steel pipe 6 are coaxially sleeved with one spiral stirrup 11, and the two spiral stirrups 11 are all poured in the main beam 1.
In order to reinforce a lower embedded arch springing steel pipe 5 and an upper embedded arch springing steel pipe 6, the lower embedded arch springing steel pipe 5 and the upper embedded arch springing steel pipe 6 in the arch springing embedded structure are both embedded steel pipes, a plurality of stiffening steel plates 12 are uniformly distributed on the outer side of the bottom of each embedded steel pipe along the circumferential direction, the stiffening steel plates 12 are welded and fixed on the outer side wall of the bottom of each embedded steel pipe, and the stiffening steel plates 12 are all embedded in a main beam 1;
the plurality of stiffening steel plates 12 are straight steel plates, the bottoms of the stiffening steel plates are welded and fixed on the embedded steel plate 4, and the plurality of stiffening steel plates 12 are vertically arranged with the embedded steel plate 4; the plurality of stiffening steel plates 12 are all vertically arranged with the embedded steel pipes arranged therein.
As shown in fig. 5, in this embodiment, 4 stiffening steel plates 12 are uniformly distributed on the outer side of the bottom of the embedded steel pipe along the circumferential direction. And, the pre-buried steel plate 4 is a rectangular steel plate.
During actual processing, the number of the stiffening steel plates 12 arranged on the outer side of the bottom of the embedded steel pipe and the arrangement positions of the stiffening steel plates 12 can be adjusted correspondingly according to specific requirements.
During actual construction, the number of the main arches 10 is one or more, and a plurality of the main arches 10 are arranged from front to back along the longitudinal bridge direction; the main beam 1 comprises two side span beam sections 1-1 and a main span beam section connected between the two side span beam sections 1-1, the main span beam section is a single-hole beam or a porous beam, the single-hole beam is a main span beam section 1-2, and the porous beam is formed by splicing a plurality of main span beam sections 1-2 arranged from front to back along a longitudinal bridge; the number of main span beam sections 1-2 in the main span beam section is the same as that of main arches 10, each main span beam section 1-2 is uniformly provided with one main arch 10, and each main arch 10 is positioned right above one main span beam section 1-2;
the number of the arch foot embedded structures is the same as that of the main arches 10, one arch foot embedded structure is uniformly distributed under each main arch 10, and each main arch 10 and the arch foot embedded structures distributed under the main arch 10 form a connecting arch foot embedded type main arch.
In this embodiment, the number of the main arches 10 is three.
In actual use, the number of the main arches 10 and the arrangement positions of the main arches 10 can be adjusted according to specific requirements.
As shown in fig. 3, the large-span beam-arch combined system bridge further comprises a bridge lower supporting structure, the bridge lower supporting structure comprises two side piers 15 and a plurality of middle piers 16 arranged between the two side piers 15, and the side piers 15 and the middle piers 16 are both piers arranged in a vertical direction; the side piers 3 are arranged below the front end and the rear end of the main beam 1, and the middle piers 16 are arranged below the joints between the main span beam sections and the two side piers 15 and between the adjacent two main span beam sections 1-2 in the main span beam sections. In this embodiment, the number of the middle piers 16 is 4.
In this embodiment, a section of the main beam 1 above the middle pier 16 is a pier top beam section (i.e., a 0# beam section, and the arch springing embedded structure is located in the pier top beam section.
In the construction process of the constructed bridge, before the main beam 1 is subjected to concrete pouring, the arch foot embedded structure is installed in a concrete pouring cavity of the main beam 1, and after the main beam 1 is poured, the arch foot embedded structure is firmly fixed in the main beam 1. In order to ensure the strength and the stability of the arch springing of the main arch 10, concrete is poured into the lower pre-embedded arch springing steel pipe 5 and the upper pre-embedded arch springing steel pipe 6 in the arch springing pre-embedded structure to form a steel pipe concrete structure. And then, constructing the main arch 10, and fastening and reliably connecting the arch steel pipes of the inner arch 2 and the outer arch 3 in the main arch 10 with the lower embedded arch steel pipe 5 and the upper embedded arch steel pipe 6 in the front and rear embedded arch springing structures respectively.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and the equivalent structure change of doing above embodiment the utility model discloses technical scheme's within the scope of protection.
Claims (10)
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| CN201921208357.3U CN210481999U (en) | 2019-07-29 | 2019-07-29 | Hidden arch foot structure of a long-span beam-arch composite system bridge |
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| CN111945549A (en) * | 2020-08-26 | 2020-11-17 | 李�浩 | Arch bridge arch foot structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111945549A (en) * | 2020-08-26 | 2020-11-17 | 李�浩 | Arch bridge arch foot structure |
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Address after: 710065 middle section of south 2nd Ring Road, Yanta District, Xi'an City, Shaanxi Province Patentee after: CHANG'AN University Patentee after: Shaanxi Traffic Control Tongyu Traffic Research Co.,Ltd. Address before: 710064 No. 33, South Second Ring Road, Shaanxi, Xi'an Patentee before: CHANG'AN University Patentee before: Shaanxi Tongyu Highway Research Institute Co.,Ltd. |