CN2477701Y - Connecting structure of bridge having simple support varied as continuation - Google Patents

Abstract

The utility model discloses a connecting structure used to change a simple support of a bridge into a continuous support. A bracket (2) and a prestressed concrete main beam (3) are arranged on a bridge pier (1); a prestressed steel beam (4) in the main beam (3) is bent upwards at the end of the main beam (3) to form a prestressed top steel beam, the non-prestressed steel bars (6) at the joint of the main beams of two adjacent spans are correspondingly welded, micro-expansion high-performance concrete (8) is grouted into the joint, fiber cloth (9) with very high tensile strength is pasted on the top of the beam at the joint, and bridge surface pavement (10) is paved on the top of the main beam. The utility model is simple in structure, convenient in operation and easy in promotion while ensuring the using performance of the bridge.

Description

Bridge becomes continuous binding structure by freely-supported

The invention belongs to the building structure technology field, relate in particular to a kind of bridge and become continuous binding structure by freely-supported.

In the prior art, simply supported girder bridge because of the technology letter, the duration is short, cost is low, obtain using very widely at the bridge of medium and small span.But the connection between the adjacent spanning girder is the outstanding problem that exists in the multispan simply supported girder bridge, usually take three kinds of modes to handle: the one, the shrinkage joint is set, the deformation curve of girder fractures at this under the load action, influence the comfortableness of driving significantly, and easily become the destruction gradually that weak link causes bridge deck herein; The 2nd, to make bridge floor and construct continuously, a large amount of investigation show that bridge used the back bridge floor to construct continuously and always produces the basic crack that connects in 2～3 years, and then influenced the destruction gradually of travelling and causing bridge deck of vehicle; The 3rd, girder is structurally got up continuously, common way is cast-in-place joint concrete and the prestressed strand of setting up the opposing hogging moment at the girder end face of this section, fundamentally change driving condition and avoided the weak link of bridge deck, but its complex process, operation are various, so that are difficult to apply.

The purpose of this utility model is to provide that a kind of technology is simple, construction fast, dependable performance, bridge with obvious social benefits become continuous binding structure by freely-supported.

The above-mentioned purpose of the utility model is to realize by such technical scheme: promptly the utility model is by lay bearing on bridge pier, precast prestressed concrete girder, prestressed strand in the girder partly upwards bends up as the top prestressed strand at the beam-ends section, the corresponding welding of nonprestressed reinforcement with adjacent spanning girder seam crossing, placing microdilatancy high performance concrete in seam, paste the very high cloth of tensile strength and constitute at the seam crossing top surface of the beam at the deck paving of girder end face making.

Technique scheme of the present utility model can further specify by the embodiment that accompanying drawing provides:

The utility model has following accompanying drawing:

Accompanying drawing 1 is a structural representation of the present utility model

Fig. 2 is the local drawing of the A-A of Fig. 1

Referring to accompanying drawing: the utility model is by lay bearing 2 on bridge pier 1, in precast prestressed concrete girder 3, be provided with prestressed strand 4, prestressed strand 4 partly upwards bends up as the top prestressed strand at the beam-ends section, with ground tackle 5 with prestressed strand 4 in beam anchorage, end at girder 3 is respectively equipped with nonprestressed reinforcement 6 up and down, with the nonprestressed reinforcement 6 corresponding welding of bar dowel 7 with adjacent spanning girder, placing microdilatancy high performance concrete 8 in seam, paste the very high cloth 9 (as carbon cloth or fibre plate) of tensile strength and constitute at the top surface of the beam of seam section at the deck paving 10 of girder 3 end face makings.Its production process is: cast bridge pier 1, lay bearing 2, prefabricated girder 3, stretch-draw prestressing force steel bundle 4 and with its with ground tackle 5 in beam anchorage, nonprestressed reinforcement 6 correspondences of adjacent spanning girder are welded with bar dowel 7 in girder 3 backs in place, placing microdilatancy high performance concrete 8 in the seam of girder 3 is pasted cloth 9 at the top surface of the beam of seam section, and the making deck paving 10 then.

The good effect that the above-mentioned binding structure of the utility model has is: the mode by simply supported girder bridge is constructed, most dead loads of bridge are born by simply supported beam, and prestressed strand partly bends up the hogging moment that produces with the opposing mobile load as the top prestressed strand at the beam-ends section; Butt joint is done simple the filling and is filled out concrete and paste carbon fiber sheet formation continuous girder bridge at top surface of the beam, the seam section only bears mobile load and the hogging moment that produces of fraction dead load very, double bearing is set on the same bridge pier also have been reduced the peak value of hogging moment and has made the shearing of seam sections almost nil, the carbon fiber sheet of pasting had both had very high-tensile, have good waterproof and buffer action again, guaranteed that this binding is configured under the condition of guaranteeing structure stress requirement and durability, improved the driving condition of bridge, and technology is simple, easy to operate, have remarkable social benefit.

Claims (1)

1, a kind of bridge becomes continuous binding structure by freely-supported, it is characterized in that: by on bridge pier (1), laying bearing (2), precast prestressed concrete girder (3), in girder, be provided with prestressed strand (4) and use ground tackle (5) in beam anchorage, prestressed strand (4) partly upwards bends up as the top prestressed strand at the beam-ends section, be provided with nonprestressed reinforcement (6) in the end of girder (3), with nonprestressed reinforcement (6) the corresponding welding of bar dowel (7) with adjacent spanning girder, placing microdilatancy high performance concrete (8) in seam, top surface of the beam at the seam section is pasted the very high cloth (9) of tensile strength, and deck paving (10) constitutes.