CN218621751U

CN218621751U - Small-and-medium-span full-rigid-frame integral bridge based on ultra-high-performance concrete H-shaped piles

Info

Publication number: CN218621751U
Application number: CN202222643371.4U
Authority: CN
Inventors: 朱俊; 吴志刚; 李剑鸾; 杨大海; 殷亮; 魏庆庆
Original assignee: Anhui Transport Consulting and Design Institute Co Ltd; Highway Traffic Energy Saving and Environmental Protection Technology and Equipment Transportation Industry R&D Center
Current assignee: Anhui Transport Consulting and Design Institute Co Ltd; Highway Traffic Energy Saving and Environmental Protection Technology and Equipment Transportation Industry R&D Center
Priority date: 2022-10-09
Filing date: 2022-10-09
Publication date: 2023-03-14
Anticipated expiration: 2032-10-09

Abstract

The utility model provides a small and medium stride integral bridge of full rigid frame of footpath based on super high performance concrete H shape stake, during the newly-built bridge engineering of mainly used small and medium stride footpath, its substructure adopted super high performance concrete H shape stake, and the pile bolck of super high performance concrete H shape stake sets up "protruding" shape bent cap, pours the base reason part of "protruding" shape bent cap earlier in order to support upper portion beam slab, and the bulge of pouring "protruding" shape bent cap after forms the pier stud roof beam and concreties. The connection of the ultra-high performance concrete H-shaped pile and the convex capping beam adopts a plug-in connection anchoring mode. The ultra-high performance concrete H-shaped pile is made of a novel cement-based composite material, the pile body has excellent mechanical property, the whole flexibility and the ductility are both good, and the anti-seismic performance is good; the pile body has good hammering resistance, strong penetrating power and good durability, and is particularly suitable for being used as the lower foundation of the small and medium-span full-rigid frame integral bridge.

Description

Small-and-medium-span full-rigid-frame integral bridge based on ultra-high-performance concrete H-shaped piles

The technical field is as follows:

the utility model relates to a public road bridge roof beam construction field, concretely relates to full rigid frame integral bridge of well middle and small span based on ultra high performance concrete H shape stake.

The background art comprises the following steps:

the integral bridge has the advantages of simple and economic structure (saving the cost of installation, daily maintenance, regular replacement and the like of the expansion device), good anti-seismic performance (the cooperative stress of the beam and the abutment) and the like, and is more and more emphasized in various countries in the world, and is also the seamless bridge technology which is researched most in various countries at present.

Furthermore, if the middle pier of the multi-span continuous medium and small bridge adopts a pier beam consolidation structure, namely a continuous rigid frame form, all expansion joints and supports of a full bridge are eliminated from the integral seamless bridge, so that zero maintenance can be truly realized, and the integral seamless bridge has a great application prospect.

In Europe and America, most of integral bridges adopt a bridge abutment with a smaller abutment body height (about 2.0-3.0 m) and higher rigidity, and the foundation under the abutment is generally a single row of H-shaped steel piles with better flexibility and ductility. The main reason is that for an integral bridge, a very flexible pile is required to accommodate its longitudinal deformation, in which connection steel piles have a greater advantage than concrete piles.

The H-shaped steel pile is a good form of the integral abutment flexible pile, but the manufacturing cost is high. In China, due to the factor of manufacturing cost, steel piles are not adopted basically, cast-in-place concrete piles are generally adopted to replace the steel piles, but the conventional concrete piles are high in rigidity and easy to crack, and are not suitable for medium and small span bridges in an integral full-seamless continuous rigid frame form.

The utility model has the following contents:

expensive to H shaped steel stake cost, the big, the easy problem that ftractures of ordinary cast-in-place concrete pile rigidity, the utility model provides a well small span full rigid frame integral bridge solution based on ultra-high performance concrete H shaped pile. The ultra-high performance concrete H-shaped pile has the characteristics of high strength, good flexibility and ductility, and lower manufacturing cost than the H-shaped steel pile, and is very suitable for the lower foundation of the full-rigid frame integral bridge.

The purpose of the utility model can be realized through the following technical scheme:

a small and medium span full rigid frame integral bridge based on ultra-high performance concrete H-shaped piles is characterized in that ultra-high performance concrete H-shaped piles are adopted as a lower structure, the ultra-high performance concrete H-shaped piles and an upper beam plate are rigidly connected through convex cover beams, and then a bridge abutment back wall and a bridge abutment butt strap are poured to form an integral seamless bridge abutment.

The utility model discloses a further technique:

preferably, the ultrahigh-performance concrete H-shaped pile 1 is designed to be a wedge-shaped H-shaped section, the upper flange and the lower flange of the H-shaped section contain low-carbon steel bars, and the distance between the steel bars is not less than 50mm.

Preferably, the weak shaft of the ultra-high performance concrete H-shaped pile is arranged along the bridge direction, and the strong shaft is arranged transversely to the bridge direction.

Preferably, the 'convex' shaped capping beam comprises a bottom edge part of the 'convex' shaped capping beam poured firstly to support the upper beam slab, and a convex part of the 'convex' shaped capping beam poured later to form abutment beam consolidation.

Preferably, the connection between the ultra-high performance concrete H-shaped pile and the convex capping beam adopts a plug-in connection anchoring mode, and the concrete structure is as follows: the ultra-high performance concrete H-shaped pile extends 10-15 cm above the bottom edge of the convex capping beam, the low-carbon steel bars in the pile continuously extend into the top edge of the convex capping beam, the extending length is not less than 30 times of the diameter of the steel bars, and finally the concrete of the convex capping beam is cast in place to complete rigid connection.

The utility model provides a well full rigid frame integral bridge structures of path of striding based on ultra high performance concrete H shape stake, its beneficial effect is:

1. the ultra-high performance concrete H-shaped pile is made of a novel cement-based composite material, the pile body has excellent mechanical properties (bending resistance, tensile resistance, shearing resistance, compression resistance and the like), and the whole pile has good flexibility and ductility and good anti-seismic performance; the pile body has good hammering resistance, strong penetrating power and good durability, and is particularly suitable for being used as the lower foundation of the small and medium-span full-rigid frame integral bridge.

2. Through calculating, from the life cycle cost consideration of whole, the utility model provides an integral bridge of full rigid frame will have the expansion joint, have the whole cost of span bridge reduction 10% ~ 20% in the middle and small of support than the conventionality, can really accomplish "zero maintenance", consequently have great application prospect and economic benefits.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a longitudinal arrangement diagram of a full rigid frame integral bridge based on an ultrahigh-performance concrete H-shaped pile;

FIG. 2 is a schematic cross-sectional view of an ultra-high performance concrete H-shaped pile;

FIG. 3 is a structural view showing the connection between an ultra-high performance concrete H-shaped pile and an abutment capping beam;

fig. 4 is an H-shaped steel pile for comparison.

In the figure, 1-an ultrahigh-performance concrete H-shaped pile, 2-low-carbon steel bars, 3-an H-shaped steel pile for comparison, 4-a convex capping beam, 5-an upper beam plate, 6-an abutment back wall and 7-an abutment butt strap.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Examples

The utility model provides a small and medium span full rigid frame integral bridge based on ultra high performance concrete H shape stake, mainly used in the newly-built bridge engineering of small and medium span. The lower structure of the pier beam rigid frame adopts an ultra-high performance concrete H-shaped pile, and the ultra-high performance concrete H-shaped pile is rigidly connected with the upper beam plate through a convex cover beam to finally form an integral bridge structure in the form of a pier beam rigid frame.

Referring to fig. 2, the ultra high performance concrete H-shaped pile 1 is designed to have a wedge-shaped H-shaped section, facilitating demolding while avoiding formation of bubbles during fabrication. The upper flange and the lower flange of the ultrahigh-performance concrete H-shaped pile 1 contain low-carbon steel bars 2, and the distance between the steel bars is not less than 50mm, so that the concrete can flow freely during pouring.

Referring to fig. 2, the weak axis of the ultra-high performance concrete H-shaped pile 1 is arranged along the bridge direction, and the strong axis is arranged transversely to the bridge direction, so as to enhance the longitudinal flexibility of the pile and reduce the bending moment of the pier beam consolidation node of the full rigid frame system.

Referring to fig. 2, the ultra-high performance concrete H-shaped pile 1 is shown, and fig. 4 is a comparative H-shaped steel pile 3, the two piles in the left figure have similar external dimensions and stress performance, but the manufacturing cost of the ultra-high performance concrete H-shaped pile 1 has obvious advantages.

Referring to fig. 1, taking a three-span continuous beam as an example, a 'convex' capping beam 4 is arranged on the top of an ultra-high performance concrete H-shaped pile 1, the bottom edge part of the 'convex' capping beam 4 is poured firstly to support an upper beam plate 5, and then the convex part of the 'convex' capping beam 4 is poured to form abutment beam consolidation (full rigid frame).

Referring to fig. 1, after the abutment convex cover beam 4 is poured, the abutment back wall 6 and the abutment butt strap 7 are poured to form an integral seamless abutment.

Referring to fig. 1, the longitudinal span L of a small and medium-span full rigid frame integral bridge based on the ultra-high performance concrete H-shaped piles can be 10m, 13m, 16m and 20m, and the span number generally does not exceed 3 spans.

Referring to fig. 3, the connection between the ultra-high performance concrete H-shaped pile 1 and the "convex" shaped cover beam 4 adopts a plug-in connection anchoring mode, and the concrete structure is as follows: the ultra-high performance concrete H-shaped pile 1 extends 10-15 cm above the bottom edge of the convex capping beam 4, the low-carbon steel bars 2 in the pile continue to extend into the top edge of the convex capping beam 4, the extending length is not less than 30 times of the diameter of the steel bars, and finally the concrete of the convex capping beam 4 is cast in place to complete rigid connection.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A full rigid frame integral bridge of well small-span based on ultra high performance concrete H shape stake which characterized in that: the lower structure of the bridge abutment adopts an ultra-high performance concrete H-shaped pile, the ultra-high performance concrete H-shaped pile is rigidly connected with an upper beam plate through a convex cover beam, and then a bridge abutment back wall and a bridge abutment butt strap are cast to form the integral seamless bridge abutment.

2. The full rigid frame integral bridge of small and medium span based on the ultra-high performance concrete H-shaped pile in claim 1 is characterized in that: the ultra-high performance concrete H-shaped pile is designed to be a wedge-shaped H-shaped section, the upper flange and the lower flange of the H-shaped section contain low-carbon steel bars, and the distance between the steel bars is not less than 50mm.

3. The full rigid frame integral bridge of small and medium span based on the ultra-high performance concrete H-shaped pile in claim 2 is characterized in that: the weak shaft of the ultra-high performance concrete H-shaped pile is arranged along the bridge direction, and the strong shaft is arranged transversely to the bridge direction.

4. The full rigid frame integral bridge of small and medium span based on the ultra-high performance concrete H-shaped pile in claim 2 is characterized in that: the convex capping beam comprises a bottom edge part of the convex capping beam poured firstly to support the upper beam slab, and a convex part of the convex capping beam poured later to form pier beam consolidation.

5. The full rigid frame integral bridge of small and medium span based on the ultra-high performance concrete H-shaped pile in claim 4 is characterized in that: the connection of the ultra-high performance concrete H-shaped pile and the convex capping beam adopts a plug-in connection anchoring mode, and the concrete structure is as follows: the ultra-high performance concrete H-shaped pile extends 10-15 cm above the bottom edge of the convex capping beam, the low-carbon steel bars in the pile continuously extend into the top edge of the convex capping beam, the extending length is not less than 30 times of the diameter of the steel bars, and finally the concrete of the convex capping beam is cast in place to complete rigid connection.