CN201891068U

CN201891068U - U-shaped prestressed concrete continuous beam bridge

Info

Publication number: CN201891068U
Application number: CN2010206250898U
Authority: CN
Inventors: 吴平平; 梁长海; 席进; 戴玮; 袁瑞
Original assignee: Anhui Transport Consulting and Design Institute Co Ltd
Current assignee: Anhui Transport Consulting and Design Institute Co Ltd
Priority date: 2010-11-26
Filing date: 2010-11-26
Publication date: 2011-07-06
Anticipated expiration: 2020-11-26

Abstract

The utility model relates to a U-shaped prestressed concrete continuous beam bridge. The U-shaped prestressed concrete continuous beam bridge comprises longitudinal beams, cross beams and a bridge deck, wherein the longitudinal beams are two parallel prestressed concrete beams, and the prestressed concrete beams and the reinforced concrete bridge deck which is horizontally connected with the prestressed concrete beams form a U-shaped structure; an intermediate cross beam is laterally arranged at the bottom of the middle of the longitudinal beams; an end cross beam is laterally arranged at the bottoms of the end parts of the longitudinal beams; standing cross beams are additionally arranged below bridge deck between the intermediate cross beam and the end cross beam at equal distances; and an expansion joint reserved slot is formed at one end of the outer side of the top surface of the end cross beam. The longitudinal beams are prestressed concrete components and are main load bearing components; the bridge deck serves as a lateral force transmission component to transmit load to the longitudinal beams; and the end cross beam and the standing cross beams serve as reinforcing components, bear the load together with the bridge deck and intensify the integrity and the lateral stiffness of the bridge beam. The U-shaped prestressed concrete continuous beam bridge has the advantages of low building height, sound insulation, noise reduction, good safety guard performance, shortened bridge length and the like, and can effectively lower the construction cost of the bridge and the total construction cost of the project.

Description

Prestressed concrete U-shaped continuous girder bridge

Technical field

The utility model relates to the technical field of buildings of bridge; Be a kind of prestressed concrete U-shaped continuous girder bridge specifically.

Background technology

Prestressed concrete U-shaped beam is a kind of bottom-road bridge girder construction form, the research to Pre-stress Concrete abroad just began in mid-term in 20th century, and built up in the world the earliest Pre-stress Concrete-Luo Shierhan bridge by Britain in 1952, span is 48.6 m; Now stride Rhone's road bridge in the Switzerland in 1990 and adopt degree of uprising girder channel beam structure, span reaches 143 m; During this period, states such as France, Japan, Germany, Australia, Chile also use in railway, highway and rail traffic bridge in succession, move all right for many years.It is later relatively that starting is used in domestic research to channel beam, some scholars have carried out a large amount of theories and experimental study to the stress performance of channel beam in recent years, in railway and rail traffic bridge, progressively begin application in practice, mostly adopt prefabricated freely-supported prestressed concrete U-shaped beam, and in the highway of China and urban road bridge also less application prestressed concrete U-shaped beam bridge, the application in highway bridge yet there are no pertinent literature for prestressed concrete U-shaped continuous girder bridge.

Use at present more case beam, T beam and plate-girder in highway highway and the urban road bridge and be the deck type structure, shortcoming such as have depth of fill height behind building height height, the abutment platform, wire length is long, land occupation is many.

The utility model content

Concrete structure design scheme of the present utility model is as follows:

Prestressed concrete U-shaped continuous girder bridge is made up of longeron, crossbeam and bridge deck, and described longeron is two parallel concrete beam, and it laterally connects by bridge deck, and longeron and bridge deck form the U-shaped structure; Described prestressed concrete U-shaped continuous girder bridge is provided with supporting construction at the two ends and the middle part of bridge respectively, is a kind of lower support type prestressed concrete open type continuous system bridge.The end bottom transverse of longeron is established end floor beam, and the end face outside one end of end floor beam is provided with the shrinkage joint preformed groove, and the middle part bottom transverse of described longeron is established middle cross beam, adds at a certain distance under the bridge deck bottom surface of middle cross beam between end floor beam and strides a crossbeam.

Described longeron is a prestressed concrete member.

Described bridge deck are reinforced concrete member.

Useful technique effect of the present utility model is: compare with case beam, T beam, plate-girder, have that building height is low, an advantage such as sound insulation and noise reduction, security protection performance are good.

1, the utility model can significantly reduce the building height of bridge floor at the bottom of the beam, and under identical road longitudinal gradient condition, it is long to shorten bridge greatly, can reduce the bridge cost effectively; Can reduce simultaneously the depth of fill behind the abutment platform, the occupation of land of saving bridge approach reduces the engineering quantity of the cubic metre of earth and stone, thereby can save project total cost.

2, the side bar of the utility model both sides effect of anticollision barrier of having held concurrently can be saved the expense that guardrail is installed, and for separating grade separation (bridge crossing), owing to guardrail is not set, has reduced the building height of bridge, and it is slim and graceful that structure seems.

Description of drawings

Fig. 1 is the utility model 1/2 structural representation.

Fig. 2 is the I--I sectional view of Fig. 1.

Fig. 3 is the II--II sectional view of Fig. 1.

Fig. 4 is the III--III sectional view of Fig. 1.

The specific embodiment

The present invention is described in further detail to reach concrete enforcement below in conjunction with accompanying drawing.

Embodiment: referring to Fig. 1, Fig. 2, prestressed concrete U-shaped continuous girder bridge, by longeron 1, bridge deck 2, end floor beam 3, middle cross beam 5, stride a crossbeam 4 and form, 7 is middle pier center line.Described prestressed concrete U-shaped continuous girder bridge is provided with supporting construction at the two ends and the middle part of bridge respectively, is a kind of lower support type prestressed concrete open type continuous system bridge.Longeron 1 is two parallel prestressed reinforced concrete construction beams, and it laterally connects by the reinforced concrete bridge deck plate, and longeron 1 forms the U-shaped structure with bridge deck 2; The middle part bottom transverse of longeron 1 is established middle cross beam 5, and middle cross beam 5 is erected on the middle Dun Dunding.The end bottom transverse of longeron 1 is established end floor beam 3, adds at a certain distance under the bridge deck bottom surface of middle cross beam 5 between end floor beam 3 to stride a crossbeam 4 and (see Fig. 3, Fig. 4).The end face outside one end of described end floor beam is provided with shrinkage joint preformed groove 6.

Described longeron 1 is a prestressed concrete member, is main bearing member.Bridge deck 2 are passed to longeron 1 as the pass force crossly member with load action; End floor beam 3, stride a crossbeam 4,, also strengthen the globality and the lateral stiffness of bridge simultaneously with bridge deck 2 fellowship structure stresses as reinforcement.

When bridge floor end floor beam 3 when narrower (clear span is less than or equal to 5 meters), stride a crossbeam 4, middle cross beam 5 is reinforced concrete member, when bridge floor broad (clear span is greater than 5 meters) end floor beam 3, stride a crossbeam 4, middle cross beam 5 is prestressed concrete member.

Claims

1. prestressed concrete U-shaped continuous girder bridge is made up of longeron, crossbeam and bridge deck, and described longeron is two parallel concrete beam, and it laterally connects by bridge deck, and longeron and bridge deck form the U-shaped structure; Described prestressed concrete U-shaped continuous girder bridge is provided with supporting construction at the two ends and the middle part of bridge respectively, is a kind of lower support type prestressed concrete open type continuous system bridge; It is characterized in that: the end bottom transverse of longeron is established end floor beam, the end face outside one end of end floor beam is provided with the shrinkage joint preformed groove, the middle part bottom transverse of described longeron is established middle cross beam, adds at a certain distance under the bridge deck bottom surface of middle cross beam between end floor beam and strides a crossbeam.

2. prestressed concrete U-shaped continuous girder bridge according to claim 1 is characterized in that: described longeron is a prestressed concrete member.

3. prestressed concrete U-shaped continuous girder bridge according to claim 1 is characterized in that: described bridge deck are reinforced concrete member.