Semi-integral abutment bridge with energy-absorbing materials buried in multiple positions and its construction method

Abstract

The invention relates to a semi-integrated type bridge abutment bridge with multiple portions embedded with energy absorption materials and a construction method of the semi-integrated type bridge abutment bridge. The semi-integrated type bridge abutment bridge comprises a main girder. The main girder is connected with a bridge abutment. The bridge abutment comprises a lower bridge abutment body arranged on the lower portion of the main girder and used for supporting the main girder and an upper bridge abutment body connected with the end of the main girder. The upper bridge abutment body is connected with one end of a connection plate, and the other end of the connection plate is connected with a bridging slab. The joint of the connection plate and the bridging slab is provided with a corbel. The lower portions of the bridging slab, the connection plate and the corbel are provided with miniature piles respectively. The direction of the long edges or long shafts of the miniature piles should be perpendicular to the longitudinal deformation direction of the bridge. The pile length and section areas of the miniature piles at different positions are different from one another. The energy absorption materials are arranged among the bridge abutment, the miniature pile tops and the surrounding soil. The cross section of the energy absorption materials surrounding the miniature pile tops is square. The energy absorption materials between the bridge abutment and the soil behind the abutment are rectangular. By means of the bridge, the stress of the connection plate, the bridging slab and the bridge abutment is improved, the stability of the soil behind the bridge abutment is guaranteed, damage to miniature pile bodies is lowered, the longitudinal deformation ability of the bridge is not affected, and most importantly, the anti-seismic ability of the bridge is improved.

Description

technical field

[0001] The invention relates to the field of bridges, in particular to a semi-integral abutment bridge with energy-absorbing materials embedded in multiple parts and a construction method thereof. Background technique

[0002] As a major category of seamless bridges, semi-integral abutment bridges have distinct characteristics. The abutment and the main girder are connected as a whole, connected to the embankment, and play the role of soil retaining. There are no expansion joints and expansion devices between the abutment and the main girder. The longitudinal displacement generated when the concrete temperature changes, shrinks and creeps is determined by Soil absorption behind the stage. Compared with ordinary bridges, the bridge's abutment stress and soil deformation behind the abutment will become very unfavorable. Under the action of cooling, the soil behind the abutment will form a wedge-shaped sliding block and cannot remain stable. Under the conditi...

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