Integral bridge abutment structure for controlling subsidence of abutment backfill and construction method of integral bridge abutment structure

Abstract

The invention relates to improvement of an integral bridge abutment structure in bridge engineering, in particular to an integral bridge abutment structure for controlling subsidence of abutment backfill and a construction method of the integral abutment structure. The integral bridge abutment structure comprises a concrete pile foundation, a bridge abutment and an approach slab connected with the bridge abutment, wherein a corrugated metal plate is fixed to the rear surface layer of the bridge abutment, a plurality of layers of foam plates are laid upwards in the vertical direction between the approach slab and compacted abutment backfill and tightly attached to the corrugated metal plate, and a filling soil layer with the thickness of 20-30 cm is laid on each layer of foam plate. And the filling height of the foam plates and the filling layer is consistent with the height of the bridge abutment. According to the novel structure, the horizontal deformation capacity of the bridge under the action of temperature and earthquake load is greatly improved while settlement of the abutment backfill is effectively controlled.

Description

technical field [0001] The invention relates to the improvement of an integral abutment structure in bridge engineering, in particular to an integral abutment structure and a construction method thereof for settlement of filling soil behind a control console. Background technique [0002] With the continuous development of engineering technology in our country, the integral abutment seamless bridge is loved by bridge engineers because of its many advantages. The integral bridge can effectively avoid setting expansion joints and supports, increase the driving quality, and has good integrity and earthquake resistance. It has good performance, reduces the later maintenance, saves the cost of the bridge life cycle, and simplifies the construction method; but because it cancels the expansion joint device and is directly integrated with the bridge head slab, it is in the temperature effect and concrete shrinkage and creep. Under the action of the displacement of the bridge deck, l...

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Problems solved by technology

[0003] In view of problems such as relatively large transverse horizontal deformation (bridge deck width direction) and post-abutment settlement in existing integral abutment bridges, the purpose of the present invention is to provide an integral abutment structure and its construction in which the backfill of the console is settled. method, effective console backfill settlement and absorption of bridge longitudinal horizontal deformation (bridge deck length direction)

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