Structure and method for controlling jointless abutment back subsidence and pavement cracking by using reinforcement geotextile

Abstract

The invention relates to a structure and a method for controlling jointless abutment back subsidence and pavement cracking by using reinforcement geotextile. The bridge abutment of a jointless bridge is connected with an access board, backfill reinforced by multilayer reinforcement geotextile is arranged above the access board, backfill reinforced by multilayer reinforcement geotextile is also arranged under the access board, spacing is formed between the backfill reinforced by multilayer reinforcement geotextile and under the access board, and the wall body of the bridge abutment, an elastic material layer in the spacing is wrapped on the abutment back of the abutment, the wall body of the abutment is supported on a single rank of piles, the periphery of the single rank of piles is also wrapped by an elastic material layer, and the access board is obliquely arranged, and a discrete material layer is arranged at the tail end of the access board. With the reinforcement principle of the reinforcement geotextile and ingenious structural arrangement, a flexible structural layer with good overall integrity and higher rigidity is formed, so that the abutment back subsidence and pavement cracking of the jointless bridge are effectively controlled, the rigid-and-flexible stable transition of the road and bridge transition section is realized, and the structure and method are particularly applicable to jointless bridges with integral type abutments.

Description

technical field [0001] The invention relates to a structure and a method for controlling post-settlement and road surface cracking of a seamless abutment by a reinforced geotextile, and is particularly suitable for an integral abutment seamless bridge, belonging to the technical field of bridges. Background technique [0002] The use of seamless bridges is constantly increasing. This type of bridge has more advantages than traditional bridges, for example: seamless bridge abutments are not set (expansion joints and supports) is a solution to avoid any performance degradation related to expansion joints and supports, since the cancellation Expansion joints and bearings are eliminated, so they do not need to be inspected and replaced, saving bridge life cycle costs. In order to cancel the expansion joints, the bridge head straps are directly connected to the end of the seamless bridge, so the straps will be subject to the displacement of the bridge deck due to temperature eff...

AI Technical Summary

Problems solved by technology

[0003] Especially in seamless bridges with integral abutments, in order to avoid setting expansion joints, the bridge head straps are directly connected to the integral abutment, so the straps will be subject to displacements caused by temperature effects and concrete shrinkage and creep. The effect is that stress concentration occurs at the end of the board, which leads to the settlement of the road surface near the end of the board, which causes road cracking and bridge head jumping, thereby reducing driving comfort and bridge life.

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