CN214328328U

CN214328328U - Implement road bed by stage and change bridge structure

Info

Publication number: CN214328328U
Application number: CN202023055359.9U
Authority: CN
Inventors: 张爱华; 胡文锁; 吴清波; 唐润求
Original assignee: Hubei Provincial Road & Bridge Co ltd
Current assignee: Hubei Provincial Road & Bridge Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-10-01
Anticipated expiration: 2030-12-17

Abstract

The utility model relates to a roadbed bridge-changing structure implemented by stages, which comprises a side slope pile foundation arranged in the side slopes at the two sides of the existing roadbed, a side slope cover plate arranged at the top of the side slope pile foundation and temporary buttresses arranged outside the side slopes of the existing roadbed; the center pile foundation is arranged in the center of the existing roadbed, the center cover plate is arranged at the top of the center pile foundation, a permanent tie beam is arranged between the side slope cover plate and the center cover plate, and a temporary tie beam is arranged between the side slope cover plate and the temporary buttress; the bridge deck is arranged on the side slope cover plate, the central cover plate and the permanent tie beam, and a newly-built pavement system is arranged above the bridge deck. The utility model has the advantages that: the utility model adopts a supporting system of a roadbed-bridge structure combining a pile foundation, a cover plate and a tie beam, and has reasonable and stable structure; the utility model discloses a decking preparation scheme, not occupy the soil, not influenced by ground topography, make in advance, practice thrift the time limit for a project, and subtracted the cost of transportation of prefabricated decking.

Description

Implement road bed by stage and change bridge structure

Technical Field

The utility model relates to a highway engineering technical field, in particular to implement road bed and change bridge structure stage by stage.

Background

Along with the continuous expansion of cities, highway facilities are also continuously extended, and a plurality of urban roads are planned or built to the boundary of a highway. There are inevitably many intersections between the newly built road route and the existing road route. The crossing of the urban road and the highway can adopt two schemes of crossing the urban road or passing the highway downwards. When the roadbed of the existing highway at the intersection point is lower, a scheme of spanning the existing highway by a newly-built overpass bridge is generally adopted; however, when the existing highway subgrade at the intersection is higher in filling height and the existing highway is penetrated under the newly-built highway, in order to save the manufacturing cost and reduce the engineering investment, the scheme of changing the existing highway subgrade into the bridge is often adopted to replace the scheme of crossing the existing highway by the newly-built overpass bridge.

At present, in the implementation of roadbed-bridge engineering, the bridge deck slab manufacturing method comprises two methods, namely prefabrication and cast-in-place. The bridge deck prefabrication scheme needs to construct a prefabrication field and a simple steel bar processing field, the method occupies a large amount of fields, construction and transportation costs are increased, and the influence on the environment is increased; the bridge deck cast-in-place method has high requirements on the construction process and relatively longer construction period, thereby influencing longer traffic time and having higher cost.

Therefore, it is important to find a structure for improving a bridge by a roadbed in stages, which has a simple structure and is convenient and fast to construct, and can reduce the construction period and the construction cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the not enough among the prior art, provide a carry out road bed in stages and change bridge construction.

The step-by-step implementation roadbed bridge reconstruction structure comprises side slope pile foundations arranged in side slopes on two sides of an existing roadbed, side slope cover plates arranged at the tops of the side slope pile foundations, and temporary buttresses outside the side slopes of the existing roadbed; the center pile foundation is arranged in the center of the existing roadbed, the center cover plate is arranged at the top of the center pile foundation, a permanent tie beam is arranged between the side slope cover plate and the center cover plate, and a temporary tie beam is arranged between the side slope cover plate and the temporary buttress; the bridge deck is arranged on the side slope cover plate, the central cover plate and the permanent tie beam, and a newly-built pavement system is arranged above the bridge deck.

Preferably, the method comprises the following steps: and the side slope cover plate, the temporary tie beam and the temporary buttress are provided with distribution beams, and the distribution beams are provided with steel bottom dies and steel side dies of the bridge deck.

The utility model has the advantages that:

1. the utility model discloses a road bed that pile foundation, apron, tie beam combined together changes bridge construction support system, rational in infrastructure and firm.

2. The utility model discloses a decking preparation scheme, not occupy the soil, not influenced by ground topography, make in advance, practice thrift the time limit for a project, and subtracted the cost of transportation of prefabricated decking.

3. The utility model discloses a loop wheel machine is staged, slowly with road half width of a bridge deck flat push to existing road bed top, installs pile foundation cover plate structural again, and the installation is simple, and the engineering volume is little for the construction progress of road bed bridge engineering has changed, has also accelerated the speed of the whole width of a road traffic simultaneously.

Drawings

FIG. 1 is a schematic longitudinal section of a roadbed-modified bridge structure implemented in stages;

FIG. 2 is a schematic view of the arrangement of the slope foundations and temporary buttresses;

FIG. 3 is a schematic longitudinal section of FIG. 2;

FIG. 4 is a schematic view of the arrangement of the center pilings and tie beams;

FIG. 5 is a schematic illustration of the construction of a bridge deck prefabrication;

fig. 6 is a schematic view of the installation of the deck slab.

Description of reference numerals: 1-existing pavement systems; 2-existing roadbed; 3-side slope cover plate; 4-side slope pile foundation; 5-central cover plate; 6-central pile foundation; 7-permanent tie beam; 8-bridge deck; 9-steel side die; 10-steel bottom die; 11-distribution beam; 12-temporary tie-down beam; 13-temporary support; 14-new route; 15-new road surface system.

Detailed Description

The present invention will be further described with reference to the following examples. The following description of the embodiments is merely provided to aid in understanding the invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Example one

The roadbed bridge construction implemented by stages comprises side slope pile foundations 4 arranged in side slopes on two sides of an existing roadbed 2, a side slope cover plate 3 structure arranged at the tops of the side slope pile foundations 4, and temporary buttresses 13 on the outer sides of the side slopes of the existing roadbed 2; the structure of the central pile foundation 6 arranged in the center of the existing roadbed 2 and the central cover plate 5 arranged on the top of the central pile foundation 6, a permanent tie beam 7 is arranged between the side slope cover plate 3 and the central cover plate 5, and a temporary tie beam 12 is arranged between the side slope cover plate 3 and a temporary buttress 13; a bridge deck 8 disposed on the side decking 3, the centre decking 5 and the permanent tie beams 7, and a newly built roadway system 15 above the bridge deck 8.

The side slope cover plate 3, the temporary tie beam 12 and the temporary buttress 13 are provided with a distribution beam 11, and a steel bottom die 10 and a steel side die 9 can be arranged on the distribution beam 11 and used for manufacturing the bridge deck 8.

Example two

The construction method for implementing the roadbed-bridge structure by stages comprises the following steps:

1) as shown in fig. 2 and 3, partial side slope excavation is respectively performed on both sides of the existing roadbed 2, and then cast-in-place pile (pile-column integrated) construction is respectively performed at a certain distance from the side slope excavation area and the outer side of the side slope, thereby completing construction operations of the side slope pile foundation 4 and the temporary buttress 13 of the bridge. And finally, arranging the reinforcing steel bars of the side slope cover plate 3 at the top of the side slope pile foundation 4, erecting a template, and pouring concrete to form an integrated structure of the side slope pile foundation 4 and the side slope cover plate 3.

2) As shown in fig. 4, the central half of the road is closed, and the two sides of the road are communicated. Excavating a foundation pit in the center of the existing roadbed 2, performing cast-in-place pile (pile-column integrated) construction to complete the construction operation of the central pile foundation 6, then configuring central cover plate 5 steel bars on the top of the central pile foundation 6, erecting a template, and pouring concrete to form a central pile foundation 6 and central cover plate 5 integrated structure. Sequentially closing a half-width bidirectional traffic car in a half-width manner, digging a groove between the side slope cover plate 3 and the central cover plate 5, and constructing a permanent tie beam 7; while temporary tie-beams 12 are applied between the decking 3 and the temporary buttresses 13.

3) As shown in fig. 5, distribution beams 11 are respectively installed and erected on the side slope cover plates 3, the temporary tie beams 12 and the temporary buttresses 13 on two sides of the existing roadbed 2, then steel bottom molds 10 and steel side molds 9 are installed on the distribution beams 11, reinforcing steel bars of the bridge deck 8 are bound, concrete is poured, and the half-width bridge deck 8 of the road is manufactured.

4) As shown in fig. 6, the road is sequentially closed in half width and two-way opened, a half width existing road surface system 1 and an existing roadbed 2 are dug to cover plate height, a half width bridge deck 8 is slowly and slightly lifted by a crane in stages, is horizontally pushed to the existing roadbed 2, is placed down and installed on a pile foundation cover plate structure, and then a newly-built road surface system 15 is constructed to be in perfect lap joint with the existing road surface system 1.

5) As shown in fig. 1, the temporary buttress 13 and the temporary tie beam 12 are finally removed, the roadbed below the bridge deck 8 is excavated, a channel with an inclined revetment for the new road 14 to pass is formed, and the construction of changing the roadbed into the bridge is completed.

Claims

1. The utility model provides a carry out road bed in stages and change bridge structure which characterized in that: the side slope supporting device comprises side slope pile foundations (4) arranged in side slopes on two sides of an existing roadbed (2), a side slope cover plate (3) arranged at the top of each side slope pile foundation (4), and temporary buttresses (13) arranged on the outer sides of the side slopes of the existing roadbed (2); a central pile foundation (6) arranged in the center of the existing roadbed (2) and a central cover plate (5) arranged at the top of the central pile foundation (6), a permanent tie beam (7) is arranged between the side slope cover plate (3) and the central cover plate (5), and a temporary tie beam (12) is arranged between the side slope cover plate (3) and a temporary buttress (13); a bridge deck (8) arranged on the side slope cover plate (3), the central cover plate (5) and the permanent tie beam (7), and a newly-built road system (15) above the bridge deck (8).

2. A phased ballast bridge construction according to claim 1 characterised in that: and the side slope cover plate (3), the temporary tie beam (12) and the temporary buttress (13) are provided with a distribution beam (11), and the distribution beam (11) is provided with a steel bottom die (10) and a steel side die (9) of the bridge deck (8).