CN202347427U

CN202347427U - Tied arch-T type rigid framework cooperation system bridge

Info

Publication number: CN202347427U
Application number: CN2011202234975U
Authority: CN
Inventors: 张哲�; 李文武; 朱伟志; 许婓; 王会利
Original assignee: Dalian University of Technology
Current assignee: Dalian University of Technology
Priority date: 2011-06-20
Filing date: 2011-06-20
Publication date: 2012-07-25
Anticipated expiration: 2021-06-20

Abstract

The utility model discloses a tied arch-T type rigid framework cooperation system bridge which belongs to building engineering technology field, and relates to design of bridge in the bridge engineerings, particularly relates to design of long-span bridge, characterized in a construction pile, a bearing platform, a bridge pier, a bridge abutment, a support construction arch bridge main beam, and a T type rigid framework main beam; pull each segment of steel arch rib temporary tie-rod; erect steel arch rib to shut by segments; mount and pull arch bridge permanent tie-rod and dismount each segment of steel arch rib temporary tie-rod; mount and pull suspension rods; and then carry out construction bridge floor pavement, rails and illumination related engineerings. The effects and benefits of the utility model lie in that in the tied arch-T type rigid framework cooperation system, the T type rigid framework employs concrete material, which is lower than engineering cost of a cable stayed bridge or a suspension bridge in same span, and is suitable for long-span bridge structure; the tied arch system is adopted, and the structure has no horizontal thrust, which means low basic requirements.

Description

Tied arch---the firm structure co-operative system of T type bridge

Technical field

The utility model belongs to construction engineering technical field, relates to the design of the bridge in the bridge engineering, specially refers to the design of long-span bridge beam.

Background technology

At present, the co-operative system of arch bridge formation comprises:

1, arched girder combined system arch rib and the binder that will mainly bear pressure common carrying that combine; Have the big and beam bridge two big characteristics strong of arch bridge span ability concurrently to the ground adaptive capacity; Widen the scope of application of arch formula system greatly, can be the classics of the utilization of co-operative system.

2, trussed bridge can be called the arched girder bridge formation again, is the co-operative system of arch and girder truss.Its main bearing member is the truss arch sheet, is made up of last lower chord, web member and real abdomen section.There is thrust at its arch springing place, makes to stride a moment of flexure and reduce, and the real abdomen section of span centre is main with pressurized, and have the loading characteristic of arch again: each rod member mainly bears axial force, has common truss loading characteristic again; And the rigidity of structure is big, quality is little, save material, is a kind of reasonable stress and comparatively economic co-operative system.

3, the upper chord with trussed bridge breaks off to the appropriate location between the vault at Dun Ding; The formation cantilever is analysed and is set a roof beam in place from breakpoint to pier top; Form common trussed bridge between striding between two breakpoints, structure just becomes the co-operative system of girder truss and truss arch, is called truss built-up arch system.The truss combination arch bridge had both kept the characteristic of arch formula thrust structure, had brought into play the characteristic of beam again.

4, rigid framed arch bridge then is the co-operative system of arch bridge and rigid frame beam bridge, and this system has both the characteristic of beam type rigid frame characteristic and arch.Structure relies on thrust at springer to produce the most of moment of flexure of internal moment balance in the bigger zone of moment of flexure, presents the characteristic of arch; And in the less zone of its moment of flexure (close end); Form with rigit-frame beam is carried; The characteristic that presents beam has so then reasonably solved discontinuity problem in the bridge member, can make bridge respectively form member and become well-balanced; And advantages such as it has, and member is few, quality is little, the big easy construction of rigidity, cost is low, moulding is succinctly attractive in appearance have been widely used in striding the directly bridge of 25m～70m.

5, tiltedly draw an arch co-operative system in the free cantilever erection construction works of long-span arch bridge, to obtain using widely.The setting of suspension cable has reduced the drift of arch member as depression bar greatly, has reduced slenderness ratio; Can be in the work progress through the amount of deflection of adjustment Suo Li control arch, the intensity that had both guaranteed structure can guarantee the linear of arch axis line again with stable.And the real arch co-operative system that tiltedly draws has also obtained practice in adding the Malaysian Putrajaya bridge that built up in 2002; Xiangtan City Xiang River four bridges that built up in domestic 2006 have also adopted this kind structural system; But in this kind system; Power transmission between suspension cable and the arch is also indeterminate, and therefore both distortion do not play the effect that co-operative system is learnt from other's strong points to offset one's weaknesses not in same level.

More than various systems, except that truss built-up arch system, be arch and bear load jointly simultaneously with other structures, belong to simple textural association, do not have real mutual cooperation; And truss built-up arch system though realized real cooperation, can not be used for striding greatly the footpath.

Summary of the invention

The purpose of the utility model provides the bridge type of a kind of bowstring arch bridge and the firm structure system cooperation of T type, is used for the problem of long-span bridge beam with the arch bridge that solves.

The technical scheme of the utility model is that the abut of tied arch is supported on the firm structure of T type, links to each other with bracket between tied arch and the firm structure girder of T type, and arch bridge and the firm structure of T type are cooperated each other.

The concrete steps of the utility model are:

Step 1. construction pile foundation, cushion cap, bridge pier and abutment.

The firm structure girder of step 2. rack construction arch bridge girder and T type.Set up support, segmental hoisting steel case beam.On support, build firm structure concrete girder of T type and arch rib concrete abut.After concrete reaches intensity, the firm structure concrete girder of stretch-draw T type prestressing force.

The interim tie-rod of each section of step 3. stretch-draw steel arch rib.

Step 4. segmentation is set up the steel arch rib to closing up.Set up the gin pole Hoisting System, segmentation promotes the steel arch rib to closing up.

Step 5. is installed and the permanent tie-rod of stretch-draw arch bridge, removes the interim tie-rod of each section steel arch rib;

Step 6. is installed and the stretch-draw hoist cable;

Step 7. construction deck paving, railing, illumination ancillary works.

The effect and the benefit of the utility model are: tied arch---in the firm structure co-operative system of T type, the firm structure of T type adopts concrete material, and is lower than the cable stayed bridge or the suspension bridge construction costs of striding the footpath on an equal basis, is suitable for the long-span bridge girder construction; Employing donor system, structure does not have horizontal thrust, the basis is required low.

Description of drawings

Accompanying drawing is a tied arch---the firm structure co-operative system of T type elevational schematic view.

Among the figure: 1 arch rib; 2 stulls; 3 hoist cables; 4 abuts; 5 arch bridge girders; The firm structure girder of 6T type; 7 tie-rods; 8 brackets; 9 bridge piers; 10 cushion caps; 11 pile foundations.

The specific embodiment

Be described in detail the specific embodiment of the utility model below in conjunction with technical scheme and accompanying drawing.

After construction pile foundation, cushion cap, bridge pier and abutment finish, the firm structure girder of rack construction arch bridge girder and T type.Segmentation is set up the steel arch rib to closing up, and installs and the permanent tie-rod of stretch-draw arch bridge, removes the interim tie-rod of each section steel arch rib.The deck paving of constructing at last, railing, illumination ancillary works are installed and the stretch-draw hoist cable.

Class of loading: highway-I level.

Arch rib section: steel case section.

Girder section: the firm structure girder of T type adopts the concrete box type cross section, and the arch bridge girder adopts steel case beam section.

Material behavior: arch rib adopts the Q345 steel, and the firm structure girder of T type adopts the C50 concrete, and the arch bridge girder adopts the Q345 steel, and hoist cable adopts and extrudes sheath twisting type drag-line, and tie-rod adopts and extrudes sheath twisting type drag-line, and pier, stake, cushion cap adopt the C30 concrete.

Claims

1. a tied arch---the firm structure co-operative system of T type bridge is a long-span bridge type structural system bridge, and its characteristic is following:

(1) abut of tied arch is supported on the firm structure of T type;

(2) link to each other with bracket between tied arch and the firm structure girder of T type.