An abutment reaming structure for optimizing the deformation capacity of integral abutment bridges

Abstract

The invention discloses an abutment reaming hole construction for optimizing deformation capability of an integral abutment bridge. The construction comprises an abutment reaming hole, a deformation layer and supporting piles. The abutment reaming hole is arranged at the supporting surface of the bottom part of an abutment. The lower ends of the supporting piles are buried in the ground, and the upper ends stretch into the abutment reaming hole. The tops of the piles support the abutment. The deformation layer is arranged between the abutment reaming hole and the supporting piles arranged in the hole. The mode of connection of the tops of the supporting piles and the abutment is rigid connection or flexible connection. The methods used in flexible connection include hinge connection and slide connection. The force bearing characteristic of the abutment reaming hole construction is optimized so that force bearing performance is guaranteed and deformation capability of the abutment bridge is enhanced.

Description

Technical field [0001] The invention relates to the field of architecture, in particular to an abutment expansion structure for optimizing the deformation capacity of an integral abutment bridge. Background technique [0002] The main girder of the monolithic abutment bridge is connected as a whole with the abutment, which has good integrity. However, under this structure, the longitudinal displacement of the upper part of the bridge due to factors such as temperature, creep shrinkage, and automobile braking is mainly caused by the lower structure For compensation, this requires the abutment foundation of the substructure to have good deformability. At present, when concrete piles are mostly used in domestic abutment foundations, it is common practice to improve the deformation ability of such supporting piles. Enlarge the hole around the connecting part of the platform to make the pile have enough deformation space. However, in this method, because the deformation space in the h...

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Problems solved by technology

[0002] The main girder of the integral abutment bridge is connected to the abutment as a whole, which has good integrity. However, under this structure, the longitudinal displacement of the upper part of the bridge due to factors such as temperature, creep shrinkage, and vehicle braking is mainly caused by its substructure. Compensation, which requires the abutment foundation of the substructure to have a good deformation capacity, in the current situation that domestic abutment foundations mostly use concrete piles, to improve the deformation capacity of such supporting piles, the common practice is to connect the piles with the bridge The holes around the abutment connection are reamed so that the pile has enough deformation space, but this method cannot transmit force due to the deformation space in the hole, so that the pile top and the abutment can only be connected in a rigid connection to strengthen its bearing capacity. However, there are few connection methods for rigid connections, lack of flexibility, and the improvement of the deformation capacity of the abutment foundation is limited. How to further optimize the deformation capacity of the abutment foundation is a research direction for those skilled in the art

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