CN221000573U - Asymmetric butterfly-shaped multi-arch bridge structure - Google Patents

Abstract

The utility model relates to the technical field of an asymmetric butterfly-shaped multi-arch bridge structure, in particular to an asymmetric butterfly-shaped multi-arch bridge structure which comprises asymmetric arch ribs and arch legs, wherein the asymmetric arch ribs comprise side span arch ribs and middle span arch ribs, and the side span arch ribs and the middle span arch ribs are connected with a bridge deck girder through the arch legs; the two auxiliary arches are positioned above the main arch to form a triangular structure, so that a stable structure is formed, the main arch is connected through the bridge deck of the suspender, the cost is reduced, the construction difficulty is reduced, and the construction efficiency is improved; the main arch is connected with the auxiliary arch through the diagonal braces, and the transverse braces are arranged between the auxiliary arches, so that the stable and reliable structure of the arch rib is ensured; the arch foot comprises a main beam solid section of the embedded section and an arch rib connecting section positioned at the top of the solid section of the embedded section, the arch rib connecting section is provided with an arch rib connecting end face, and the main arch is vertically connected with the arch rib connecting end face; the included angles between the arch rib and the arch foot end face are different, so that the stress of the arch rib is more reasonable.

Description

Asymmetric butterfly-shaped multi-arch bridge structure

Technical Field

The utility model relates to the technical field of asymmetric butterfly multi-arch bridge structures, in particular to an asymmetric butterfly multi-arch bridge structure.

Background

At present, the construction of an asymmetric butterfly-shaped multi-arch bridge structure generally needs to be provided with wind cables to pull arch ribs to ensure the wind resistance stability of the arch ribs, so that the landscape of a bridge deck is messy, the clearance is influenced, the cost is increased, and the structure economy is reduced.

The built butterfly arch in China has the advantages that the cross braces are mostly I-steel, the fault tolerance rate of connection between the cross braces and the circular main arch and the circular auxiliary arch is low, excessive welding residual stress is easy to cause, and the largest stress of the structure is often generated in the inclined cross braces, so that the effective connection of the components is ensured, and the reduction of the residual stress is a main problem of the structure.

Meanwhile, the arch bridge is long and commonly used, the butterfly-shaped multi-arch is of an equal-span symmetrical structure, but in actual design, the main span of the butterfly-shaped multi-arch bridge is designed to be an asymmetric multi-arch rib protruding according to the field environment, so that the two sides of the butterfly-shaped multi-arch foot with a complex structure are connected with the arch rib and then stressed unevenly, the structure is more complex, the structural performance of the main and auxiliary parts Kong Gongjiao is required to be designed to meet the use requirement, on one hand, the complicated cost of the arch foot structure is increased, on the other hand, the total weight of the arch foot volume is increased, the structural design difficulty of the asymmetric butterfly-shaped multi-arch bridge is increased, the working difficulty is increased, and the working efficiency is reduced.

Disclosure of utility model

The utility model aims to provide an asymmetric butterfly multi-arch bridge structure, which solves the problems of complex structure and high cost of the existing asymmetric butterfly multi-arch bridge structure.

The technical scheme for achieving the purposes is as follows:

The asymmetrical butterfly-shaped multi-arch bridge structure is characterized by comprising an asymmetrical arch rib and an arch leg, wherein the asymmetrical arch rib is positioned on a bridge deck, the arch leg is connected with the bridge deck, the asymmetrical arch rib comprises a side span arch rib and a middle span arch rib with different spans, the side span arch rib and the middle span arch rib are connected with the bridge deck through the arch leg, and the arch leg is positioned between the side span arch rib and the middle span arch rib;

The side span arch rib and the middle span arch rib comprise two auxiliary arches, a main arch positioned between the two auxiliary arches and a suspender connected with the main arch; the two auxiliary arches are positioned above the main arch, the top of the suspender is connected with the main arch, and the bottom of the suspender is connected with the bridge deck; the main arch is respectively connected with the two auxiliary arches through diagonal braces, and a transverse brace is arranged between the two auxiliary arches;

The arch center comprises an embedded section and an arch rib connecting section positioned at the top of the embedded section, arch rib connecting end faces are arranged on two opposite sides of the arch rib connecting section, the main arch and the two auxiliary arches are connected with the arch rib connecting section through corresponding arch rib connecting end faces, and the main arch and the corresponding arch rib connecting end faces are vertically arranged.

Further defined, the main arch is arranged in a vertical plane, and an included angle between the plane of the auxiliary arch and the vertical plane is an acute angle; the cross sections of the main arch and the two auxiliary arches in the same vertical plane form an isosceles triangle; the cross-sectional shape of the auxiliary arch and/or the cross-sectional shape of the main arch is a circular structure.

Further defined, the main arch is formed by sequentially connecting a plurality of main arch sections to form a secondary parabolic structure, and two adjacent main arch sections are connected through a first joint; the auxiliary arch is formed by sequentially connecting a plurality of auxiliary arch sections to form a secondary parabolic structure, and two adjacent auxiliary arch sections are connected through a second joint; the cross section shape of the diagonal brace and/or the cross section shape of the transverse brace are of a circular structure.

Further defined, the cross brace is located above the secondary arch axis; the same side inclined struts are arranged at equal intervals, the hanging rods are arranged at equal intervals, and the interval ratio between two adjacent inclined struts at the same side and between two adjacent hanging rods is 1:2.5 to 4.5.

Further limiting, the two sides of the bottom of the main arch are provided with main arch pouring holes and main arch vibrating holes, the main arch pouring holes are positioned above the main arch vibrating holes, and the main arch vibrating holes are positioned at the outer sides of arch feet; the main arch top is provided with two main arch slurry outlet holes, a chord pipe partition plate is arranged in the main arch, and the chord pipe partition plate is positioned between the two main arch slurry outlet holes; the auxiliary arch is characterized in that two sides of the bottom of the auxiliary arch are sequentially provided with an auxiliary arch slurry outlet hole, an auxiliary arch pouring hole and an auxiliary arch vibrating hole from top to bottom, a chord pipe partition plate is arranged in the auxiliary arch and is positioned above the auxiliary arch slurry outlet hole, and the auxiliary arch vibrating hole is positioned at the outer side of an arch foot.

Further defined, the rib connecting end face includes a first end face and a second end face, the spacing between the top of the first end face and the top of the second end face being less than the spacing between the bottom of the first end face and the bottom of the second end face;

the first end face is provided with a first main arch ring and two first auxiliary arch rings, the two first auxiliary arch rings are symmetrically arranged above the first main arch ring along the axis of the first main arch ring, the second end face is provided with a second main arch ring and two second auxiliary arch rings, and the two second auxiliary arch rings are symmetrically arranged above the second main arch ring along the axis of the second main arch ring;

The main arch end parts of the side span arch ribs extend to the first main arch rings, the two auxiliary arch end parts of the side span arch ribs extend to corresponding first auxiliary arch rings respectively, and the main arch axes of the side span arch ribs are perpendicular to the first end surfaces; the main arch end part of the midspan arch rib extends to the second main arch ring, the two auxiliary arch end parts of the midspan arch rib respectively extend to the corresponding second auxiliary arch rings, and the main arch axis of the midspan arch rib is perpendicular to the second end face.

Further defined, the axis of the first main arch ring and the axis of the second main arch ring are located in the same vertical plane, the axis of the first main arch ring is intersected with the axis of the first auxiliary arch ring, the axis of the second main arch ring is intersected with the axis of the second auxiliary arch ring, and the length of the arch foot is equal to the length of the bridge deck No. 0 block.

Further defined, the shortest distance between the inner wall of the first auxiliary arch ring and the top of the first end face, the shortest distance between the inner wall of the first main arch ring and the bottom of the first end face, the shortest distance between the inner wall of the second auxiliary arch ring and the top of the second end face and the shortest distance between the inner wall of the second main arch ring and the bottom of the second end face are all larger than 50cm.

The top of the arch rib connecting section is of a groove structure, the groove structure comprises a first straight line section, an arc section and a second straight line section which are sequentially connected, the first straight line section is also connected with the top of the first end face, and the first straight line section is parallel to the axis of the first auxiliary arch ring; the second straight line section is also connected with the top of the second end face, and the second straight line section is parallel to the axis of the second auxiliary arch ring; the groove structure is positioned above the first auxiliary arch ring and the second auxiliary arch ring; the radius of the arc section is larger than 150cm.

Further limited, the outside of the arch bar is provided with an outer wrapping steel plate, and through holes matched with the first main arch ring, the first auxiliary arch ring, the second main arch ring and the second auxiliary arch ring are formed in the outer wrapping steel plate.

The utility model has the beneficial effects that:

1. According to the utility model, the asymmetric arch springing is utilized to connect the side span arch rib and the middle span arch rib with different spans, and the connecting end surface of the arch rib is vertically connected with the main arch in the side span arch rib and the middle span arch rib, so that the stress of the arch springing is more uniform, the wind resistance of the arch springing is improved, the design difficulty and the design cost are reduced, and the working efficiency is improved; simultaneously, the arch rib is formed by arranging the two auxiliary arches, one main arch, diagonal braces between the main arches and the auxiliary arches and transverse braces between the auxiliary arches and the auxiliary arches in a triangular structure, so that a stable structure is formed, and meanwhile, the suspenders are connected with the main arches, so that the stable and reliable structure of the arch rib can be ensured, inhaul cables can be prevented from being arranged on two sides of the main arches, the construction difficulty is reduced while the cost is reduced, and the construction efficiency is improved.

2. The utility model reduces the wind resistance of the arch rib by selecting the cylindrical main arch and the auxiliary arch, increases the fault tolerance rate of construction and installation, reduces the construction difficulty and further improves the construction efficiency; the main arch and the auxiliary arch are formed by sequentially connecting multiple sections, so that the production cost and the transportation cost of raw materials are reduced, the assembly difficulty is reduced, and the working efficiency is improved.

3. The main arch pouring holes and the main arch grout outlet holes are formed in the main arch, so that the main arch is fully poured with concrete, the structural strength of the main arch is increased, the use of wind-saving is avoided, the structural complexity is reduced, and the construction difficulty is reduced; simultaneously, concrete is poured at the bottom of the auxiliary arch, so that the structural strength of the connection position of the main arch, the auxiliary arch and the arch feet is increased, the deformation of the bottom of the main arch and the bottom of the auxiliary arch is avoided, the overall stability and reliability of the arch rib are increased, and the actual use requirement is met.

4. The axes of the main arch connecting holes and the auxiliary arch connecting holes on two sides of the arch rib connecting section are positioned on the same vertical plane, so that the stress on two sides of the arch rib connecting section is positioned on the same plane, and the calculation is convenient; simultaneously, the end parts of the main arches at the two sides of the arch rib connecting section are vertically connected with the arch rib connecting section, so that the design difficulty of the arch foot main body is further reduced; the auxiliary arch and the arch rib connecting section are utilized to correspond to the difference of the connecting included angles between the end faces, so that the arch foot main body is more uniformly stressed, the structure is simple, the dead weight of the arch foot main body is reduced, the cost is reduced, and the structural design difficulty of the asymmetric butterfly-shaped multi-arch bridge is reduced.

5. The two auxiliary arch connecting holes are formed in the same side of the arch rib connecting section, so that the two arch ribs which all comprise the two auxiliary arches can be connected, and the application range is wider; the outer side of the arch springing is provided with the outer wrapping steel plate, so that on one hand, the structural performance of the arch springing can be improved, and the stable and reliable structure of the arch springing is ensured; on the other hand, the outsourcing steel plate can be used as a pouring template of the arch springing, so that the demolding operation is reduced, and the working efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic view of a front view of a portion of the midspan rib E of FIG. 1;

FIG. 3 is a schematic top view of a portion of the midspan rib E of FIG. 1;

FIG. 4 is a schematic view of the cross-section in the direction C-C of FIG. 2;

FIG. 5 is a schematic cross-sectional view of the portion E of FIG. 1;

FIG. 6 is a schematic view of the main arch crown structure of the present utility model;

FIG. 7 is a schematic view of the structure of the main arch grout outlet of the present utility model;

FIG. 8 is a schematic vertical cross-section of a footing in accordance with the present utility model;

FIG. 9 is a schematic top view of the rib and rib connection on both sides;

FIG. 10 is a schematic illustration of the dimensions of the arch springing connection structure;

In the figure: a-asymmetric ribs; a1-a main arch; a2-auxiliary arch; a3-a boom; a4-main arch pouring holes; a5-main arch vibrating holes; a6, main arch slurry outlet holes; a8-bridge deck; a9-a first linker; aa-diagonal bracing; ab-wales; ac-annular stiffeners; ad-string tube separator; ae-stiffening angle steel; af-anti-shrinkage bars; ag-vent holes; ah-boom pad; b-arch springing; b1-embedding sections; b2-arch rib connecting sections; b3-a first end face; b4-a second end face; b5-a first main arch ring; b6-a first auxiliary arch ring; b7-arc section; b8-wrapping a steel plate; c-side span arch ribs; d-midspan rib.

Detailed Description

Example 1

The embodiment provides an asymmetric butterfly multi-arch bridge structure, which comprises an asymmetric arch rib A and an arch foot B, wherein the asymmetric arch rib A is positioned on a bridge deck A8, the arch foot B is connected with the bridge deck A8, the asymmetric arch rib A comprises a side span arch rib C and a middle span arch rib D, the spans of the middle span arch rib D are larger than those of the side span arch rib C, and the heights of the side span arch rib C and the middle span arch rib D are different.

In practice, at least one midspan rib D and two side span ribs C are typically selected and the two side span ribs C are symmetrically disposed on either side of the midspan rib D, with a bridge B disposed between the midspan rib D and the side span ribs C for connecting the bottom of the midspan rib D to the bottom of the side span ribs C such that the bridge B connects the midspan rib D and the side span ribs C to the bridge deck A8 to form an asymmetric butterfly-shaped multi-arch bridge structure; because the two side span arch ribs C have the same size and the same structure, the arch feet B at the two sides of the bottom of the middle span arch rib D have the same structure and the same size, and the arch feet B are symmetrically arranged about the vertical axis of the middle span arch rib D, and meanwhile, the side span arch ribs C and the middle span arch rib D have the same structure type; referring to fig. 1, the left side of the figure is a side span arch rib C, and the right side is a mid-span arch rib D.

Specifically, the side span arch rib C and the middle span arch rib D have the same structure types, so that the side span arch rib C and the middle span arch rib D have the same building material types and construction principles in the construction process, but different building material sizes. The midspan arch rib D and the side span arch rib C both comprise two auxiliary arches A2 and one main arch A1, and the main arch A1 and the auxiliary arch A2 of the midspan arch rib D are identical in structure and different in size from the main arch A1 and the auxiliary arch A2 of the side span arch rib C.

The main arch A1 is connected with a suspender A3 connected with a bridge deck A8, two auxiliary arches A2 are arranged on two sides above the main arch A1, at the moment, the two auxiliary arches A2 are connected with the main arch A1 through a diagonal brace Aa, the two auxiliary arches A2 are connected through a transverse brace Ab to form a stable triangle structure, and the suspender A3 is used for connecting the main arch A1 with the bridge deck A8 to ensure the stability and reliability of the asymmetric butterfly-shaped multi-arch bridge structure.

Referring to fig. 2 to 4, the center of the cross section of the main arch A1 and the two auxiliary arches A2 in the same vertical plane encloses an isosceles triangle, the main arch A1 is arranged along the vertical plane, the two auxiliary arches A2 are turned over to the outer side of the main arch A1 along the vertical plane by a certain angle, for example 19.081 degrees, and the bottoms of the main arch A1 and the auxiliary arches A2 are connected with the arch feet B; the center of the cross section of the main arch A1 is positioned on the symmetrical axis of the two auxiliary arches A2, namely, the inclined struts Aa on the two sides of the main arch A1 have the same length, the connection angles of the inclined struts Aa on the two sides are the same as those of the main arch A1, the preferred inclined struts Aa on the two sides of the main arch A1 are symmetrically arranged in a one-to-one correspondence manner, the inclined struts Aa on the two sides are arranged at equal intervals along the surface of the main arch A1, and the inclined struts Aa are vertically arranged; the horizontal arrangement of the cross brace Ab is preferred, the equidistant arrangement of the cross brace Ab and the diagonal brace Aa is further preferred, the axis of the cross brace Ab is positioned above the center of the cross section on the vertical screen plane where the corresponding cross brace Ab of the auxiliary arch A2 is positioned, namely, the axis of the cross brace Ab is higher than the center passing through the corresponding position of the auxiliary arch A2, and the axis of the cross brace Ab is preferably 150-200 mm higher than the corresponding center of the auxiliary arch, so that the construction and the installation are convenient.

The cross section of the cross brace Ab and the cross section of the diagonal brace Aa can be selected to be of an I-shaped structure or a rectangular or circular structure, and the cross section of the cross brace Ab and the cross section of the diagonal brace Aa are preferably of a circular structure.

The suspension rod A3 is vertically arranged, the top of the suspension rod A3 passes through the main arch A1 and is connected with the top of the main arch A1 through a suspension rod cushion block Ah, the bottom of the suspension rod A3 is connected with the bridge deck A8, the suspension rods A3 are equally spaced and sequentially arranged along the arrangement direction of the main arch A1, the suspension rod A3 is positioned below the diagonal braces Aa, the spacing between two adjacent suspension rods A3 is larger than the spacing between two adjacent diagonal braces Aa on the same side, and the ratio of the distances can be 2.5-4.5: 1, preferably 3:1; specifically, the suspender A3 adopts OVM.GJ15-19 and OVM.GJ15-37 inhaul cables (1860 MPa steel strands) and matched anchorage devices; the whole bundle of steel strands of the suspender A3 is extruded and pulled, three layers of anti-corrosion, anti-rust grease is coated outside the steel strands, a single polyethylene sheath is protected, a whole bundle of Bao Gaojiang polyester belts is wound and extruded with the polyethylene sheath, and waterproof layers are arranged on the upper anchor joint and the lower anchor joint of the suspender A3.

The main arch A1 and the auxiliary arch A2 are respectively of a cylindrical structure, preferably a hollow cylindrical steel pipe structure, so that on one hand, the wind resistance can be reduced, the wind resistance can be improved, on the other hand, the fault tolerance of construction can be improved, and the construction difficulty can be reduced; the radius of the main arch A1 is larger than that of the auxiliary arch A2, the main arch A1 is formed by sequentially connecting a plurality of main arch sections to form a secondary parabolic structure, and two adjacent main arch sections are connected through a first connector A9; the auxiliary arch A2 is formed by sequentially connecting a plurality of auxiliary arch segments to form a secondary parabolic structure, and two adjacent auxiliary arch segments are connected through a second joint, so that the construction is convenient, the transportation is convenient, the cost is reduced, the construction difficulty is reduced, and the construction efficiency is improved; the first connector A9 and the second connector are different in size, and the first connector A9 is selected as a common connecting structure for building construction.

Further, in order to improve the structural stability of the main arch A1 and the auxiliary arch A2, a plurality of annular stiffening rib groups are selectively arranged in the main arch A1 and the auxiliary arch A2, wherein each main arch section and each auxiliary arch section are internally provided with at least two annular stiffening rib groups, preferably two annular stiffening rib groups, each annular stiffening rib group comprises a plurality of annular stiffening ribs Ac which are arranged at equal intervals, and the structures of the annular stiffening ribs Ac in the main arch A1 and the auxiliary arch A2 are different in the same size due to the different pipe diameters of the main arch A1 and the auxiliary arch A2.

Further, the main arch A1 in the side span arch rib C, the main arch A1 in the middle span arch rib D, the auxiliary arch A2 in the side span arch rib C and the auxiliary arch A2 in the middle span arch rib D are respectively poured with concrete at the bottoms of the arch legs B when the arch legs B are connected, the bottoms of the main arch A1 and the auxiliary arch A2 can be increased in weight of the bottoms of the main arch A1 and the auxiliary arch A2 through pouring the concrete, the center is reduced, the wind resistance is improved, and on the other hand, the structural strength of the connection positions of the main arch A1 and the auxiliary arch A2 and the arch legs B is improved, the deformation risk is reduced, and the overall stability and reliability are increased; referring to fig. 5 to 7, a main arch pouring hole A4 and a main arch vibrating hole A5 are formed in the bottom of the main arch A1, the main arch pouring hole A4 is located above the main arch vibrating hole A5, concrete is poured into the main arch A1 through the main arch pouring hole A4, the poured concrete is fully vibrated through the main arch vibrating hole A5, and in order to prevent the poured concrete from generating a cavity in the bottom of the main arch A1, it is further preferable to form an exhaust hole Ag in the bottom of the main arch A1, and an exhaust passage corresponding to the exhaust hole Ag is formed in a corresponding position in the arch foot A8, so that the interior of the main arch A1 is fully poured with the concrete.

Similarly, the bottoms of the two sides of the auxiliary arch A2 are sequentially provided with an auxiliary arch slurry outlet hole, an auxiliary arch pouring hole, an auxiliary arch vibrating hole and an exhaust hole Ag from top to bottom, wherein the concrete is poured from the auxiliary arch pouring hole when the concrete is poured, and the poured concrete is vibrated through the auxiliary arch vibrating hole, and more air is discharged from the exhaust hole Ag from the bottom of the auxiliary arch A2, so that the full pouring of the concrete at the bottom of the auxiliary arch A2 is ensured; in order to avoid the excessive pouring of the concrete at the bottom of the auxiliary arch, a chord pipe baffle Ad is preferably arranged in the bottom of the auxiliary arch A2, the chord pipe baffle Ad is positioned above the auxiliary arch grout outlet, and when the concrete is poured to be in contact with the bottom of the chord pipe baffle Ad, more concrete overflows from the auxiliary arch grout outlet, so that the effective pouring of the concrete at the bottom of the auxiliary arch A2 is realized.

The chord tube partition plate Ad is of a disc structure, a plurality of stiffening angle steels Ae which are arranged in the same direction are arranged on the chord tube partition plate Ad at equal intervals, the length of the stiffening angle steels Ae can not be the same, the stiffening angle steels Ae are right angle steels, one right angle side of the stiffening angle steels Ae is connected with the chord tube partition plate Ad, and welding is optional, so that the structural strength of the chord tube partition plate Ad is improved, a plurality of uniformly distributed shrinkage-preventing reinforcing bars Af are further arranged on the chord tube partition plate Ad, and the shrinkage-preventing reinforcing bars Af vertically penetrate through the chord tube partition plate Ad and are welded with the chord tube partition plate Ad, so that the structural strength of the auxiliary arch A2 is further improved.

The difference from the auxiliary arch A2 is that, except for the bottom of the main arch A1 needs to be filled with concrete, the concrete in the main arch A1 needs to be completely filled, namely, the main arch A1 needs to be completely filled with concrete from bottom to top, at this time, a main arch grout outlet hole A6 needs to be formed in the top of the main arch A1, in order to increase the filling efficiency, the bottom of two ends of the main arch A1 is selected to be simultaneously filled, namely, a main arch grouting hole A4, a main arch vibrating hole A5 and an exhaust hole Ag are formed in the bottom of two sides of the main arch A1, two main arch grout outlet holes A6 are formed in the top of the main arch A1, as shown in fig. 6, preferably, two main arch grout outlet holes A6 are formed on the left side of the symmetry axis of the main arch A1, a chord pipe separator Ad is also arranged on the top of the main arch A1, at this time, the concrete simultaneously filled from two sides of the main arch A1 overflows from bottom to top, and the redundant concrete overflows from the main arch grout outlet hole A6 when the filling is completed.

Referring to fig. 7, the main arch grout outlet A6 is preferably a steel pipe structure, and is formed by welding with an opening on the main arch section, and the remaining main arch grout outlet A4, main arch vibration hole A5, auxiliary arch grout outlet and auxiliary arch vibration hole are provided in the same manner as the main arch grout outlet A6.

Example 2

On the basis of embodiment 1, referring to fig. 8 to 10, arch B includes pre-buried section B1 connected with bridge deck A8 and arch rib connecting section B2 located at the top of pre-buried section B1, wherein pre-buried section B1 and arch rib connecting section B2 are poured as an organic whole, opposite sides of arch rib connecting section B2 are used for connecting corresponding side span arch rib C or mid-span arch rib D, wherein arch rib connecting section B2 is provided with arch rib connecting end faces, arch rib connecting end faces are located at opposite sides of arch rib connecting section B2, namely, side span arch rib C and mid-span arch rib D at two sides of arch B are connected with arch rib connecting section B2, and included angles between arch rib connecting end faces and horizontal directions at two sides of arch rib connecting section B2 are different, so that side span arch rib C and mid-span arch rib D of different spans can be connected with arch rib connecting section B2 through corresponding inclination angles, and uneven stress at two ends of arch rib and symmetrical arch rib connecting ends caused by the connection of different spans is avoided, and self wind resistance is reduced.

Specifically, referring to fig. 8, the rib connecting end surface includes a first end surface B3 and a second end surface B4, a distance between a top of the first end surface B3 and a top of the second end surface B4 is smaller than a distance between a bottom of the first end surface B3 and a bottom of the second end surface B4, an inclination direction of the first end surface B3 is opposite to an inclination direction of the second end surface B4, that is, the rib connecting section B2 may be a trapezoid, the first end surface B3 is located on a left end surface of the rib connecting section B2, the second end surface B4 is located on a right end surface of the rib connecting section B2, and the left end surface and the right end surface are in a splayed structure.

When the arch rib connecting section B2 is connected with the side span arch rib C and the middle span arch rib D, the arch rib connecting section B2 is preferably provided with connecting holes matched with the corresponding arch ribs, so that the bottoms of the side span arch rib C and the middle span arch rib D can penetrate through the corresponding connecting holes to extend into the arch springing B to be connected with the arch springing B,

Specifically, a first main arch ring B5 and a first auxiliary arch ring B6 are arranged at a first end face B3 on the arch rib connecting section B2, a second main arch ring and a second auxiliary arch ring are arranged on a second end face B4, the first main arch ring B5 is located below the first auxiliary arch ring B6, the second main arch ring is located below the second auxiliary arch ring, and the span of the arch ribs on two sides is different, so that the connection angle of the side span arch ribs C and the arch legs B and the connection angle of the middle span arch rib D and the arch legs B are different.

Specifically, the first end face B3 is connected with the bottom of the mid-span arch rib D, the second end face B4 is connected with the bottom of the side-span arch rib C, the corresponding first main arch ring B5 is connected with the main arch A1 of the mid-span arch rib D, the first auxiliary arch ring B6 is connected with the auxiliary arch B2 of the mid-span arch rib D, the second main arch ring is connected with the main arch A1 of the side-span arch rib C, and the second auxiliary arch ring is connected with the auxiliary arch B2 of the side-span arch rib C.

The axis of the first main arch ring B5 and the axis of the second main arch ring are positioned on the same vertical plane, namely the first main arch ring B5 and the second main arch ring are oppositely arranged, meanwhile, the axis of the first main arch ring B5 is perpendicular to the first end face B3, the axis of the second main arch ring is perpendicular to the second end face B4, and the inclination angle of the first end face B3 is different from that of the second end face B4, so that the first main arch ring B5 and the second main arch ring are not symmetrical, and the stress of the main arch A1 on two sides of the arch foot B on the arch rib connecting section B2 can be more uniform; preferably, the length of the first main arch ring B5 is the same as the length of the second main arch ring, and both the bottom of the first main arch ring B5 and the bottom of the second main arch ring extend downward into the embedded section B1 but do not contact the bottom of the embedded section B1.

The included angle between the axis of the first auxiliary arch ring B6 and the first end face B3 is different from the included angle between the axis of the second auxiliary arch ring and the second end face B4, and the included angles are acute angles, namely, the axis of the first auxiliary arch ring B6 is close to the axis of the first main arch ring B5, the axis of the second auxiliary arch ring is close to the axis of the second main arch ring, at the moment, the included angle between the axis of the first main arch ring B5 and the axis of the first auxiliary arch ring B6 and the included angle between the axis of the second auxiliary arch ring and the axis of the second main arch ring are acute angles, namely, the axis of the first auxiliary arch ring B6 is intersected with the axis of the first main arch ring B5, and the included angle between the axis of the first auxiliary arch ring B6 and the axis of the first end face B3 is 80-85 degrees; the included angle between the axis of the second auxiliary arch ring and the second end face B4 is 82-87 degrees.

Referring to fig. 9, the number of the first auxiliary arches B6 on the first end face B3 is two, the two first auxiliary arches B6 are symmetrically arranged at two sides of the first main arch B5, and the axes of the two first auxiliary arches B6 are arranged in parallel and are positioned on the same horizontal plane; the number of the second auxiliary arches on the second end face B4 is two, the two first auxiliary arches B6 are arranged in one-to-one correspondence with the two second auxiliary arches, the axes of the two second auxiliary arches are arranged in parallel and are positioned on the same horizontal plane, the axes of the two opposite first auxiliary arches B6 and the axes of the second auxiliary arches are positioned in the same vertical plane, the axes of the two first auxiliary arches B6 and the axes of the first main arches B5 are intersected at the same point, and the axes of the two second auxiliary arches and the axes of the second main arches are intersected at the same point, so that the shearing force of the arch rib connecting section B2 is reduced, and the structural stability of the arch rib connecting section B2 is ensured; preferably, the length of the first auxiliary arch ring B6 is the same as the length of the second auxiliary arch ring, and the length of the first auxiliary arch ring B6 is greater than the length of the first main arch ring B5; at this time, the bottom of the first auxiliary arch ring B6 extends downward to the upper side of the first main arch ring B5, the first auxiliary arch ring B6 is located in the arch rib connecting section B2, the bottom of the second auxiliary arch ring extends downward to the upper side of the second main arch ring, and the first auxiliary arch ring B6 and the second auxiliary arch ring are both located in the arch rib connecting section B2.

Further limited, the top of the arch rib connecting section B2 is of a groove structure, the groove structure is positioned above the first auxiliary arch ring B6 and the second auxiliary arch ring, the groove structure comprises a first straight line section, an arc section B7 and a second straight line section which are sequentially connected, wherein the first straight line section is also connected with the top of the first end face B3, the second straight line section is also connected with the top of the second end face B4, the first straight line section is parallel to the axis of the first auxiliary arch ring B6, the second straight line section is parallel to the axis of the second auxiliary arch ring, the arc section B7 is tangent to the first straight line section and the second straight line section respectively, and therefore wind resistance is further improved, and meanwhile, the radius of the arc section is not less than 150cm, and stress concentration is avoided; and meanwhile, the distance between the first straight line section and the outer wall of the first auxiliary arch ring 7 and the distance between the second straight line section and the outer wall of the second auxiliary arch ring are not smaller than 50cm.

Further limited, the top surface and the horizontal direction slope of pre-buried section B1 set up, and specifically, pre-buried section B1 is close to the height that first terminal surface B3 is greater than pre-buried section B1 is close to second terminal surface B4 for pre-buried section B1 is close to first terminal surface B3's one side atress ability is stronger, can be suitable for the arch rib of bigger span, for example main span, makes second terminal surface B4 can be suitable for the arch rib of span less, for example side span.

Further limited, the outer side of the arch bar B is provided with an outer wrapping steel plate B8, the thickness of the outer wrapping steel plate B8 can be 25mm, the arch bar B is restrained, through holes matched with the first main arch ring B5, the first auxiliary arch ring B6, the second main arch ring and the second auxiliary arch ring respectively are formed in the outer wrapping steel plate B8, and when the corresponding arch ribs are connected, the outer wrapping steel plate B8 can be connected with the corresponding first main arch ring B5, the corresponding first auxiliary arch ring B6, the corresponding second main arch ring or the corresponding second auxiliary arch ring along the corresponding through holes.

Referring to fig. 10, in actual use, the structural dimensions of the arch leg B are determined first, then the structure of the arch leg B is formed by enclosing the outer wrapping steel plate B8 and the rest of the dies, the rest of the dies are removed to leave the outer wrapping steel plate B8, and the structural strength and wind resistance of the arch leg B are increased; the height L5 between the vertex of the first end surface B3 and the horizontal plane, that is, the left side height of the arch foot B may be 610.8cm, the height L3 of the pre-embedded section B1 near the first end surface B3, that is, the left side height of the pre-embedded section B1 may be 143.8cm, at this time, the left side height L4 of the arch rib connecting section B2 may be 467cm, the right side height L1 of the arch rib connecting section B2 may be 470.2cm, the height L1 of the pre-embedded section B1 near the second end surface B4 may be 137.4cm, the height L2 between the vertex of the second end surface B4 and the horizontal plane, that is, the right side height of the arch foot B may be 607.6cm, the length L7 of the arch foot B is equal to the solid length of the beam body No. 0, that is L7 is 1200cm, and the beam No. 0 is the bottom structure of the arch foot B in fig. 10.

Meanwhile, an included angle alpha 1 between the first end face B3 and the left side end face of the embedded section B1 is 146.38 degrees, an included angle alpha 1 between the axis of the first main arch ring B5 and the first end face B3 is 90 degrees, an included angle alpha 2 between the axis of the first auxiliary arch ring B6 and the first end face B3 is 83.64 degrees, and an included angle alpha 3 between the same first straight line section and the first end face B3 is 83.64 degrees; the included angle beta 1 between the second end face B4 and the right end face of the embedded section B1 is 145.9 degrees, the included angle beta 1 between the axis of the second main arch ring and the second end face B4 is 90 degrees, the included angle beta 2 between the axis of the second auxiliary arch ring and the second end face B4 is 84.48 degrees, and the included angle alpha 3 between the second straight line section and the second end face B4 is 84.48 degrees.

Meanwhile, the length of the first main arch ring B5 can be 270cm, the length of the first auxiliary arch ring B6 can be 300cm, the length of the first straight line section can be 247.5cm, and the length of the second straight line section can be 245.3cm; the distance S1 between the first straight line segment and the outer wall of the first auxiliary arch ring 7 may be selected to be 50cm, and the distance S2 between the second straight line segment and the outer wall of the second auxiliary arch ring may be selected to be 50cm.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like, as used herein, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Claims (10)

1. An asymmetric butterfly-shaped multi-arch bridge structure is characterized by comprising an asymmetric arch rib (A) positioned on a bridge deck (A8) and an arch leg (B) connected with the bridge deck (A8), wherein the asymmetric arch rib (A) comprises a side span arch rib (C) and a middle span arch rib (D) which are different in span, the side span arch rib (C) and the middle span arch rib (D) are connected with the bridge deck (A8) through the arch leg (B), and the arch leg (B) is positioned between the side span arch rib (C) and the middle span arch rib (D);

The side span arch rib (C) and the middle span arch rib (D) comprise two auxiliary arches (A2), a main arch (A1) positioned between the two auxiliary arches (A2) and a suspender (A3) connected with the main arch (A1); the two auxiliary arches (A2) are positioned above the main arch (A1), the top of the suspender (A3) is connected with the main arch (A1), and the bottom of the suspender (A3) is connected with the bridge deck (A8); the main arch (A1) is respectively connected with the two auxiliary arches (A2) through inclined struts (Aa), and a transverse strut (Ab) is arranged between the two auxiliary arches (A2);

the arch center (B) comprises an embedded section (B1) and an arch rib connecting section (B2) positioned at the top of the embedded section (B1), arch rib connecting end faces are arranged on two opposite sides of the arch rib connecting section (B2), a main arch (A1) and two auxiliary arches (A2) are connected with the arch rib connecting section (B2) through corresponding arch rib connecting end faces, and the main arch (A1) is perpendicular to the corresponding arch rib connecting end faces.

2. The asymmetrical butterfly arch bridge structure of claim 1, wherein the main arch (A1) is disposed in a vertical plane, and the included angle between the plane of the auxiliary arch (A2) and the vertical plane is an acute angle; the cross sections of the main arch (A1) and the two auxiliary arches (A2) in the same vertical plane form isosceles triangles; the cross-sectional shape of the auxiliary arch (A2) and/or the cross-sectional shape of the main arch (A1) is a circular structure.

3. The asymmetrical butterfly arch bridge structure according to claim 1, wherein the main arch (A1) is formed by a plurality of main arch segments connected in sequence to form a secondary parabolic structure, adjacent two main arch segments being connected by a first joint (A9); the auxiliary arch (A2) is formed by sequentially connecting a plurality of auxiliary arch sections to form a secondary parabolic structure, and two adjacent auxiliary arch sections are connected through a second joint; the cross-sectional shape of the diagonal brace (Aa) and/or the cross-sectional shape of the cross brace (Ab) is a circular structure.

4. The asymmetrical butterfly arch bridge structure according to claim 1, characterized in that said crossbrace (Ab) is located above the axis of the auxiliary arch (A2); the same side inclined struts (Aa) are arranged at equal intervals, the hanging rods (A3) are arranged at equal intervals, and the interval ratio between two adjacent inclined struts (Aa) at the same side and two adjacent hanging rods (A3) is 1:2.5 to 4.5.

5. The asymmetrical butterfly multi-arch bridge structure according to claim 1, wherein main arch filling holes (A4) and main arch vibrating holes (A5) are formed in two sides of the bottom of the main arch (A1), the main arch filling holes (A4) are located above the main arch vibrating holes (A5), and the main arch vibrating holes (A5) are located on the outer sides of arch feet (B); two main arch slurry outlets (A6) are formed in the top of the main arch (A1), a string pipe partition plate (Ad) is arranged in the main arch (A1), and the string pipe partition plate (Ad) is positioned between the two main arch slurry outlets (A6); the auxiliary arch (A2) is characterized in that auxiliary arch slurry outlet holes, auxiliary arch filling holes and auxiliary arch vibrating holes are sequentially formed in two sides of the bottom of the auxiliary arch (A2) from top to bottom, a string pipe partition plate (Ad) is arranged in the auxiliary arch (A2), the string pipe partition plate (Ad) is located above the auxiliary arch slurry outlet holes, and the auxiliary arch vibrating holes are located on the outer sides of arch feet (B).

6. The asymmetrical butterfly arch bridge structure of any of claims 1 to 5, wherein the arch rib connecting end surfaces comprise a first end surface (B3) and a second end surface (B4), the spacing between the top of the first end surface (B3) and the top of the second end surface (B4) being smaller than the spacing between the bottom of the first end surface (B3) and the bottom of the second end surface (B4);

A first main arch ring (B5) and two first auxiliary arch rings (B6) are arranged on the first end face (B3), the two first auxiliary arch rings (B6) are symmetrically arranged above the first main arch ring (B5) along the axis of the first main arch ring (B5), a second main arch ring and two second auxiliary arch rings are arranged on the second end face (B4), and the two second auxiliary arch rings are symmetrically arranged above the second main arch ring along the axis of the second main arch ring;

The main arch end parts of the side span arch ribs (C) extend to the first main arch rings (B5), the two auxiliary arch end parts of the side span arch ribs (C) extend to corresponding first auxiliary arch rings (B6) respectively, and the main arch axes of the side span arch ribs (C) are perpendicular to the first end face (B3); the main arch end of the midspan arch rib (D) extends to the second main arch ring, the two auxiliary arch end of the midspan arch rib (D) extends to the corresponding second auxiliary arch ring respectively, and the main arch axis of the midspan arch rib (D) is perpendicular to the second end face (B4).

7. The asymmetrical butterfly arch bridge structure of claim 6, wherein the axis of the first main arch ring (B5) is in the same vertical plane as the axis of the second main arch ring, the axis of the first main arch ring (B5) intersects the axis of the first auxiliary arch ring (B6), the axis of the second main arch ring intersects the axis of the second auxiliary arch ring, and the length of the arch foot (B) is equal to the length of the bridge deck (A8) No. 0 block.

8. The asymmetrical butterfly arch bridge structure of claim 7, wherein the shortest distance between the inner wall of the first auxiliary arch ring (B6) and the top of the first end surface (B3), the shortest distance between the inner wall of the first main arch ring (B5) and the bottom of the first end surface (B3), the shortest distance between the inner wall of the second auxiliary arch ring and the top of the second end surface (B4), and the shortest distance between the inner wall of the second main arch ring and the bottom of the second end surface (B4) are all greater than 50cm.

9. The asymmetrical butterfly arch bridge structure of claim 8, wherein the top of the rib connecting section (B2) is a groove structure, the groove structure comprising a first straight line section, an arc section (B7) and a second straight line section connected in sequence, the first straight line section being further connected to the top of the first end face (B3), the first straight line section being parallel to the axis of the first secondary arch ring (B6); the second straight line section is also connected with the top of the second end face (B4), and the second straight line section is parallel to the axis of the second auxiliary arch ring axis; the groove structure is positioned above the first auxiliary arch ring (B6) and the second auxiliary arch ring; the radius of the arc section (B7) is larger than 150cm.

10. The asymmetrical butterfly arch bridge structure according to claim 9, wherein an outer steel plate (B8) is arranged on the outer side of the arch leg (B), and through holes matched with the first main arch ring (B5), the first auxiliary arch ring (B6), the second main arch ring and the second auxiliary arch ring are formed in the outer steel plate (B8).