CN1210465C

CN1210465C - Girder type bridge

Info

Publication number: CN1210465C
Application number: CNB021513929A
Authority: CN
Inventors: 黑泽亮平; 田边惠三; 山田文男
Original assignee: Kurosawa Construction Co Ltd
Current assignee: Kurosawa Construction Co Ltd
Priority date: 2001-12-20
Filing date: 2002-11-20
Publication date: 2005-07-13
Anticipated expiration: 2022-11-20
Also published as: CN1427125A; KR20030052239A; KR100550241B1; JP2003184029A; HK1053684A1; JP3703760B2

Abstract

To provide a girder bridge which has an extended span and a reduced height. According to the girder bridge 1, a bridge girder 3 is formed by binding together main girders 5 which span an interval between bridge abutments 2, in a lateral direction. Each main girder 5 is obtained by connecting together concrete girder members 9 each with a built-in steel frame 13 in a lengthwise direction, applying prestress to the concrete girder members by inner cables 12, and applying prestress to the steel frames 13 by outer cables 4.

Description

Beam bridge

Technical field

The present invention relates to beam bridge.

Background technology

As shown in Figure 5, beam bridge 23 in the past, main beam 24 is arranged between the abutment 26 at the bridge crossbeam 25 of width formation in bond, and its central portion supports by bridge pier 27.In addition, main beam 24 is connected to form in the longitudinal direction by the beam member 28 of concrete system, and is endowed prestressing force by interior steel wire 29.

But, the span of beam bridge as described above, because the moment of deflection that deadweight produces according to the bridge crossbeam increases, 30～40m is a boundary.And, because the boundary of the rise-span ratio of beam (depth of beam: horizontal wide) is 1/17.5, be difficult to construct in the place of restriction deck-molding.

The present invention has used for reference the problems referred to above and has carried out, and its purpose is to provide and can adds large span on the one hand and dwindle the beam bridge of deck-molding on the other hand.

Summary of the invention

For the main points of the present invention that solve above-mentioned problem are, it is characterized in that, stride across the main beam that is provided with between the abutment at width formation bridge in bond crossbeam, aforementioned main beam built-in the beam member of concrete system of steelframe engage continuously by interior steel wire in the longitudinal direction and be endowed prestressing force, give prestressing force by outer steel wire to aforementioned steelframe, described outer steel wire is fixed on the fixed head at the both ends that are arranged at above-mentioned steelframe, and extends between abutment.Comprise that in addition beam member is the member that is formed with the cross section I type on the edge of a wing in the upper and lower of the soffit of girder respectively, in the end with form to the side-prominent edge parts of the soffit of girder two with the edge of a wing with wide fish plate.Comprise that in addition outer steel wire connects the edge part of beam member and connects up.Comprise that also main beam engages by the horizontal steel wire that is routed at fish plate, cast in-site pouring concrete between the main beam of this horizontal steel wire is arranged in wiring.

By the bridge crossbeam being applied the load of slinging, mainly can offset live load by the prestressing force of giving to the steelframe of main beam.In addition, owing to reduced deadweight, (in 50～70m), can save bridge pier in the past can adding large span significantly.And the boundary of the rise-span ratio of beam (depth of beam: horizontal wide) can be brought up to 1/30, can dwindle deck-molding.Form with edge part with the edge of a wing with wide fish plate on the horizontal steel wire of wiring, cast in-site pouring concrete can form on the bridge crossbeam by aforementioned fish plate and be endowed prestressed crossbeam between the main beam of this horizontal steel wire that connected up.In addition, the edge part that is connecting outer steel wire becomes the constraint member, main beam can be made a string beam.And, owing to become a steelframe of the main beam of string beam and concrete becomes one, can not produce flexing.

Description of drawings

(1) is the front view of beam bridge among Fig. 1, and (2) are partial enlarged drawings.

(1) is the concept map of beam bridge among Fig. 2, and (2) are the sectional drawings of beam bridge, and (3) are the sectional drawings of wanting portion.

(1) is the sectional drawing of main beam end among Fig. 3, and (2) are the A-A line sectional drawings of (1), and (3) are lateral views of the main beam of end, and (4) are the opposite side views of the main beam of end.

(1) is the sectional drawing of the central portion of main beam among Fig. 4, and (2) are the B-B line sectional drawings of (1), and (3) are the C-C line sectional drawings of (1).

Fig. 5 is the front view of beam bridge in the past.

The specific embodiment

Below, the embodiment of beam bridge of the present invention is described with reference to the accompanying drawings.This beam bridge 1 as shown in Figure 1, the bridge crossbeam 3 between 4 pairs of abutments 2 of outer steel wire of twisting thread etc. by PC steel wire, PC steel is given the load of slinging and is constituted.

Bridge crossbeam 3 as Fig. 2～shown in Figure 4, is tied up formation by the horizontal steel wire 6 that 6 main beams 5 are twisted thread etc. with PC steel wire or PC steel on width.Main beam 5 is engaged by fish plate 10 by the beam member 9 that forms cross section I type with steelframe 13 and concrete 18 and forms, and is endowed prestressing force by interior steel wire 12.This fish plate 10 in order to prevent because the damage of the fish plate that repeatedly load produces, by the soffit of girder two side-prominent edge parts 11 to beam member 9 form with the edge of a wing 20 with wide.Also have, cast in-site pouring concrete eight forms crossbeam 21 in 7 between the fish plate of adjacency, gives prestressing force by horizontal steel wire 6 on this crossbeam 21.

On the other hand, be embedded in steelframe 13 in the edge of a wing 20 of beam member 9 by forming, become one by studs 19 and the concrete 18 that are darted at below this L shaped steel plate 17 by junction plate 16 engaged two L shaped steel plates 17.In addition, an end of steelframe 13 be provided with fixing outside the fixed head 14 of end of steel wire 4, fish plate 15 is set in the other end, these are overlapped engages by shearing wedge 22.In view of the above, the steelframe 13 of each beam member is engaged to one becomes as 1 steelframe.In addition, steelframe 13 also can spread all over the integral body of beam member 9 not only on the edge of a wing, top, promptly buries underground in last bottom flange 20.

Also have, connect edge part 11 wirings of main beams 5 both sides by above-mentioned outer steel wire 4, both ends are stretched on the fixed head 14 that is fixed on steelframe 13, and main beam 5 becomes with edge part 11 as a string beam that fetters member, all gives the load of slinging to bridge crossbeam 1.

By the bridge crossbeam being applied the load of slinging, mainly can offset live load by the prestressing force of giving to the steelframe of main beam.

Owing to reduced deadweight, (in 50～70m), can save bridge pier in the past can adding large span significantly.

The boundary of the rise-span ratio of beam (depth of beam: horizontal wide) can be brought up to 1/30, can dwindle deck-molding.

Can on the bridge crossbeam, form by fish plate and to be endowed prestressed crossbeam.

Become the constraint member owing to connecting the edge part of outer steel wire, main beam can be made a string beam.

Owing to become a steelframe of the main beam of string beam and concrete becomes one, can not produce flexing.

Claims

1. beam bridge, it is characterized in that, stride across the main beam that is provided with between the abutment at width formation bridge in bond crossbeam, aforementioned main beam built-in the beam member of concrete system of steelframe engage continuously by interior steel wire in the longitudinal direction and be endowed prestressing force, give prestressing force by outer steel wire to aforementioned steelframe, described outer steel wire is fixed on the fixed head at the both ends that are arranged at above-mentioned steelframe, and extends between abutment.

2. beam bridge as claimed in claim 1 is characterized in that, beam member is the member that is formed with the cross section I type on the edge of a wing in the upper and lower of the soffit of girder respectively, in the end with form to the side-prominent edge parts of the soffit of girder two with the edge of a wing with wide fish plate.

3. beam bridge as claimed in claim 2 is characterized in that, outer steel wire connects the edge part of beam member and connects up.

4. as claim 2 or 3 described beam bridges, it is characterized in that main beam engages by the horizontal steel wire that is routed at fish plate, cast in-site pouring concrete between the main beam of this horizontal steel wire is arranged in wiring.