Bridge abutment structure for jointless bridge and construction method of bridge abutment structure

Abstract

The invention discloses a bridge abutment structure for a jointless bridge and a construction method of the bridge abutment structure. The structure comprises a bearing platform, a bridge abutment anda main beam; the bearing platform is fixed to a pile foundation and is in sliding connection with the bridge abutment on the top, and the bridge abutment and the main beam are connected through pouring at the same time; a stop block is arranged on the portion, located on the outer side of the bridge abutment, of the top of the bearing platform. According to the bridge abutment structure suitablefor the jointless bridge and the construction method of the bridge abutment structure, the bridge abutment and the main beam are fixedly connected and directly arranged on the bearing platform, the contact surface adopts a stainless steel plate, vertical constraints are only provided, no constraint exists in the horizontal direction, and a beam body can stretch out and draw back freely at the bridge abutment under the temperature effect. The flex volume of the whole beam body is absorbed by a buffer layer arranged after the abutment. By arranging the stop block and the seal buffer layer, the shock resistance and durability of the bridge are improved. The structural form is between the integral bridge and the semi-integral bridge, the principle is simple, the structure is reliable, the construction technology is simple, and the bridge abutment structure is particularly suitable for small and medium span jointless bridges small in bridge abutment height and large in rigidity.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to an abutment structure for bridges without expansion joints and a construction method thereof. Background technique [0002] Most of the bridges for modern vehicles are bridges with seams, that is, expansion joints are set at the joint ends to adapt to temperature deformation and supports are set at the abutments. Among them, the bridges with the largest number of applications and the greatest impact are small and medium-span bridges. Due to the long-term exposure of the bridge expansion device and the support to the atmosphere, the operating environment is harsh. On the one hand, the telescopic device bears the wear and impact from the live load, and on the other hand, it suffers from thermal expansion and contraction, shrinkage and creep, etc., which can easily cause damage and cause damage to the bridge deck and beam body. Due to long-term exposure to the atmosphere, bridge b...

AI Technical Summary

Problems solved by technology

Semi-integral bridges are suitable for abutments and foundations with high rigidity. Compared with integral bridges, because of the gaps in semi-integral bridges, soil and water are easy to invade the support, which affects the normal function and durability of the support.

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