CN219260694U

CN219260694U - Quick-construction overpass bridge

Info

Publication number: CN219260694U
Application number: CN202222567789.1U
Authority: CN
Inventors: 燕斌; 李亮辉; 邓博; 张志�; 刘少华; 刘晓鸣; 卢刚; 孙双磊; 陈作银; 彭沉彬
Original assignee: Beijing Municipal Development Freeway Construction And Administration Co ltd; Beijing Guodaotong Highway Design&research Institute Co ltd
Current assignee: Beijing Municipal Development Freeway Construction And Administration Co ltd; Beijing Guodaotong Highway Design&research Institute Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-06-27
Anticipated expiration: 2032-09-27

Abstract

The utility model relates to the technical field of bridges, in particular to a bridge span capable of being quickly built, which comprises a girder, wherein a bridge pier is fixedly connected to the middle of the girder, a middle span supporting component is fixedly connected to the bottom of the bridge pier, end supporting components are fixedly connected to two ends of the girder, a crossed road is arranged between the two end supporting components, and the middle span supporting component is positioned at a central isolation belt in the middle of the crossed road. The utility model can greatly shorten the cast-in-situ construction time of the traditional overpass bridge, reduce the interference to the road to be crossed, and simultaneously can improve the construction quality and enhance the durability of the overpass bridge.

Description

Quick-construction overpass bridge

Technical Field

The utility model relates to the technical field of bridges, in particular to a flying lead bridge capable of being quickly built.

Background

Along with the continuous expansion of the construction scale of the infrastructure in China, the road network density is gradually increased, and the frequency of road intersection is also higher and higher. When crossing between high-grade roads, or between high-grade roads and low-grade roads, a stereo crossing is required, that is, a bridge is required to be built. According to statistics, more than 90% of bridge-crossing lines in China adopt a concrete beam structure. Most of the overpasses are constructed by cast-in-situ.

When constructing the overpass, the crossed road is often seriously affected. Firstly, the construction of a cross-line bridge needs to encroach on a crossed road, even needs to interrupt the crossed road, and the problem that the traffic capacity of the crossed road is rapidly reduced due to node construction is formed; secondly, the construction of the overpass bridge has the risk of falling objects at high altitude, and when vehicles passing through the road at low speed, the accidents of the vehicle and personal injury are easily caused; thirdly, the overpass bridge is usually constructed by adopting concrete cast-in-situ, and the concrete needs longer time from pouring to forming strength, thereby objectively increasing the influence on the traffic capacity of the crossed road and the accident occurrence risk; finally, the increase in the construction period of the overpass directly affects the increase in engineering costs, which here includes both an increase in investment costs and an increase in social costs due to detouring.

The construction period of the overpass bridge is long because the time-consuming duty ratio of field construction is very high, the cast-in-situ rate can be reduced by the assembled structure, and the load capacity of the large hoisting machinery and carrying equipment is greatly improved in consideration of the rapid development of engineering machinery, so that the prefabrication of the large structural member is possible.

In view of the foregoing, how to shorten the construction period of the overpass and reduce the comprehensive influence of the construction of the overpass on the road to be crossed, it is of great benefit to the road network with increasingly heavy traffic, and therefore a quick construction of the overpass is needed.

Disclosure of Invention

The utility model aims to provide a bridge span capable of being quickly built, so as to solve the problems, and achieve the purposes of greatly shortening the cast-in-situ construction time of the traditional bridge span, reducing the interference to a road to be crossed, improving the construction quality and enhancing the durability of the bridge span.

In order to achieve the above object, the present utility model provides the following solutions:

the bridge span capable of being quickly built comprises a main beam, wherein the middle part of the main beam is fixedly connected with a bridge pier, the bottom of the bridge pier is fixedly connected with a span middle supporting component, two ends of the main beam are fixedly connected with end supporting components, a crossed road is arranged between the two end supporting components, and the span middle supporting component is positioned at a central isolation belt in the middle of the crossed road; the girder and the pier are integrally cast and formed, and the girder and the pier are prefabricated and formed.

Preferably, the midspan supporting component comprises a plurality of pier supports, the pier supports are arranged at equal intervals along the length direction of the bottom of the pier, the tops of the pier supports are fixedly connected with the same bottom of the pier, the bottoms of the pier supports are fixedly connected with the same midspan supporting part, and the midspan supporting part is positioned at a central isolation belt in the middle of the intersected road.

Preferably, the midspan supporting part comprises a pier bearing platform, the top of the pier bearing platform is fixedly connected with the bottoms of the pier bearing seats, and pier pile foundations are fixedly connected at the bottoms of the pier bearing platform.

Preferably, the end support assembly comprises a plurality of abutment supports, the abutment supports are arranged at equal intervals along the length direction of the bottom of the main beam, the tops of the abutment supports are fixedly connected with the bottom of the main beam, the bottoms of the abutment supports are fixedly connected with the same end support part, and the end support part is positioned outside the building limit of the crossed road.

Preferably, the end supporting part comprises an abutment body, the top of the abutment body is fixedly connected with the bottoms of the abutment supports, abutment bearing platforms are fixedly connected to the bottoms of the abutment body, and abutment pile foundations are fixedly connected to the bottoms of the abutment bearing platforms.

Preferably, the pier bearing platform and the pier pile foundation are integrally cast and formed.

Preferably, the abutment body, the abutment bearing platform and the abutment pile foundation are integrally cast and formed.

The utility model has the following technical effects: the girder and the bridge pier are manufactured and molded in advance in factories by integrating the girder and the bridge pier into a whole, so that the cast-in-situ rate is reduced; the prefabricated girder and the bridge pier are transported to a construction site through a large hoisting machine and carrying equipment, two ends of the girder are fixedly connected with end supporting assemblies respectively, the bridge pier is fixedly connected with a mid-span supporting assembly, the integral installation of the mid-span bridge is realized, the cast-in-situ construction time of the traditional mid-span bridge is greatly shortened, the interference to a road to be crossed is reduced, the construction quality is improved, and the durability of the mid-span bridge is enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

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

FIG. 2 is a cross-sectional view of a pier structure according to the present utility model;

FIG. 3 is a cross-sectional view of the bridge deck body of the present utility model;

1, a main beam; 2. bridge piers; 3. pier supports; 4. abutment support; 5. bridge pier bearing platform; 6. pier pile foundation; 7. abutment body; 8. abutment cap; 9. abutment pile foundation; 10. is intersected with the road.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.

Referring to fig. 1-3, the present embodiment provides a bridge span capable of being quickly constructed, including a main beam 1, wherein a bridge pier 2 is fixedly connected to the middle of the main beam 1, a middle bridge support assembly is fixedly connected to the bottom of the bridge pier 2, end support assemblies are fixedly connected to both ends of the main beam 1, a crossed road 10 is arranged between the two end support assemblies, and the middle bridge support assembly is located at a central isolation zone in the middle of the crossed road 10; the girder 1 and the pier 2 are integrally cast and formed, and the girder 1 and the pier 2 are prefabricated and formed.

Analysis shows that the construction period of the bridge span is long because the time-consuming duty ratio of site construction is very high, and the cast-in-situ is the longest time-consuming link in site construction, so that from the perspective of reducing the cast-in-situ rate, a scheme of factory prefabrication and site hoisting is provided to optimize the construction of the bridge span, the bridge structure system needs to be innovated, the influence of construction of components in the building limit of the crossed road 10 on the crossed road 10 is the greatest, and the girder 1 and the pier 2 are positioned in the building limit of the crossed road 10, so that the girder 1 and the pier 2 are manufactured and formed in advance in a factory by casting the girder 1 and the pier 2 into a whole to reduce the cast-in-situ rate; considering the rapid development of engineering machinery, the loading capacity of large hoisting machinery and carrying equipment is greatly improved, prefabricated girders 1 and piers 2 are transported to a construction site through the large hoisting machinery and the carrying equipment, two ends of the girders 1 are fixedly connected with end supporting components respectively, the piers 2 are fixedly connected with mid-span supporting components, the integral installation of the mid-span bridge is realized, and the influence of construction of the girders 1 and the piers 2 on the crossed road 10 is greatly reduced.

Further optimizing scheme, stride well supporting component includes a plurality of pier supports 3, and a plurality of pier supports 3 are followed pier 2 bottom length direction equidistant setting, and the top and the same pier 2 bottom rigid coupling of a plurality of pier supports 3, and a plurality of pier supports 3 bottom rigid coupling have same stride well supporting part, stride well supporting part and are located by the central median department in the middle part of road 10.

According to a further optimization scheme, the midspan supporting portion comprises a pier bearing platform 5, the top of the pier bearing platform 5 is fixedly connected with the bottoms of the pier bearing seats 3, and pier pile foundations 6 are fixedly connected to the bottoms of the pier bearing platforms 5.

The pier supports 3 have the capacity of limiting the relative displacement of the transverse bridge between the pier 2 and the pier bearing platform 5, and a plurality of pier supports 3 are arranged at equal intervals along the length direction of the bottom of the pier 2, so that the number of the pier supports 3 can be determined according to the actual length of the bottom of the pier 2, and in this embodiment, 4 pier supports 3 are preferable.

Further optimizing scheme, tip supporting component includes a plurality of abutment support 4, and a plurality of abutment support 4 are along girder 1 bottom length direction equidistant setting, and a plurality of abutment support 4 tops and same girder 1 bottom rigid coupling, a plurality of abutment support 4 bottom rigid couplings have same tip supporting part, and tip supporting part is located by the building limit outside of crossing road 10.

Further optimizing scheme, tip supporting part includes abutment body 7, abutment body 7 top and a plurality of abutment support 4 bottom rigid coupling, abutment body 7 bottom rigid coupling has abutment cushion cap 8, abutment cushion cap 8 bottom rigid coupling has abutment pile foundation 9.

The abutment support 4 has the ability to restrict the transverse bridge-wise relative displacement of the main beam 1 and the abutment body 7, and meanwhile, the abutment support 4 has the ability to allow the longitudinal bridge-wise relative displacement of the main beam 1 and the abutment body 7, and a plurality of abutment supports 4 are arranged at equal intervals along the length direction of the bottom of the main beam 1, and the number of abutment supports 4 can be confirmed according to the actual length of the bottom of the main beam 1, and the number of abutment supports 4 in this embodiment is preferably 4.

According to the further optimization scheme, the pier bearing platform 5 and the pier pile foundation 6 are integrally cast to form the structure.

According to the further optimization scheme, the abutment body 7, the abutment bearing platform 8 and the abutment pile foundation 9 are integrally cast and formed.

The bridge pier bearing platform 5 and the bridge pier pile foundation 6 are formed by casting in situ, and the bridge pier bearing platform 5 and the bridge pier pile foundation 6 are positioned at the central isolation zone of the intersected road 10, so that the influence of construction on the passing road of the intersected road 10 is avoided.

Abutment body 7, abutment cap 8 and abutment pile foundation 9 are cast in place shaping, and abutment body 7, abutment cap 8 and abutment pile foundation 9 are located by the building limit outside of crossing road 10, avoid the influence of construction to the traffic road of crossing road 10.

The working procedure of this embodiment is as follows:

during construction, firstly, constructing a pier pile foundation 6 and a pier bearing platform 5 within the range of a central isolation zone of a crossed road 10, constructing a abutment pile foundation 9, an abutment bearing platform 8 and an abutment body 7 outside the building limit of the crossed road 10, then installing a pier support 3 on the pier bearing platform 5, and installing an abutment support 4 on the top of the abutment body 7; finally, under the condition that the intersected road 10 is limited in time, a hoisting machine or carrying equipment is adopted to install a prefabricated component system consisting of the girder 1 and the pier 2 on the pier support 3 and the abutment support 4; and after the main girder 1 and the bridge pier 2 are placed, traffic is released, and auxiliary components such as a bridge deck system and the like are constructed.

In the description of the present utility model, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

The above embodiments are only illustrative of the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model should fall within the protection scope defined by the claims of the present utility model without departing from the design spirit of the present utility model.

Claims

1. A flying lead bridge capable of being quickly built, characterized in that: the bridge comprises a main beam (1), wherein a bridge pier (2) is fixedly connected to the middle of the main beam (1), a middle-span supporting component is fixedly connected to the bottom of the bridge pier (2), end supporting components are fixedly connected to two ends of the main beam (1), a crossed road (10) is arranged between the two end supporting components, and the middle-span supporting component is positioned at a central isolation belt in the middle of the crossed road (10); the girder (1) and the pier (2) are of an integrally cast molding structure, and the girder (1) and the pier (2) are manufactured and molded in advance.

2. A flying lead bridge as defined in claim 1, wherein: the midspan supporting assembly comprises a plurality of pier supports (3), wherein the pier supports (3) are arranged at equal intervals along the length direction of the bottom of the pier (2), the tops of the pier supports (3) are fixedly connected with the bottom of the pier (2), the bottoms of the pier supports (3) are fixedly connected with the same midspan supporting part, and the midspan supporting part is positioned at a central isolation belt in the middle of the intersected road (10).

3. A flying lead bridge as defined in claim 2, wherein: the midspan supporting part comprises a pier bearing platform (5), the top of the pier bearing platform (5) is fixedly connected with the bottoms of the pier bearing seats (3), and pier pile foundations (6) are fixedly connected with the bottoms of the pier bearing platform (5).

4. A flying lead bridge as defined in claim 1, wherein: the end support assembly comprises a plurality of abutment supports (4), wherein the abutment supports (4) are arranged at equal intervals along the length direction of the bottom of the main beam (1), the tops of the abutment supports (4) are fixedly connected with the bottom of the main beam (1), the bottoms of the abutment supports (4) are fixedly connected with the same end support part, and the end support part is positioned outside the building limit of the crossed road (10).

5. A flying lead bridge as defined in claim 4, wherein: the end supporting part comprises an abutment body (7), the top of the abutment body (7) is fixedly connected with the bottoms of the abutment supports (4), abutment bearing platforms (8) are fixedly connected to the bottoms of the abutment body (7), and abutment pile foundations (9) are fixedly connected to the bottoms of the abutment bearing platforms (8).

6. A flying lead bridge as defined in claim 3, wherein: and the pier bearing platform (5) and the pier pile foundation (6) are of an integral pouring molding structure.

7. A flying lead bridge as defined in claim 5, wherein: abutment body (7), abutment cushion cap (8) with abutment pile foundation (9) are integrative pouring shaping structure.