Bridgehead roadbed composite structure for preventing bumping at bridgehead and construction method

Abstract

The invention discloses a bridgehead roadbed composite structure for preventing bumping at a bridgehead. The bridgehead roadbed composite structure comprises an asphalt surface layer, a pavement structure layer, a transition slab and a sleeper beam from top to bottom, one end of the butt strap is lapped on a bracket of an abutment ear back wall and abuts against the abutment, the other end of the butt strap is lapped on the sleeper beam, and the integrity of the sleeper beam and the butt strap is achieved through the steel bar connector; first-grade broken stone hardcore layers are arranged below the butt strap and on the two sides of the sleeper beam, and drainage facilities are arranged in the first-grade broken stone hardcore layers; the outer side face of the first grading broken stone hardcore layer is wrapped with a non-woven geotextile inverted filter layer, and the upper surface of the geotextile inverted filter layer is connected with a pavement structure layer. A second-grade broken stone hardcore can be further arranged beside the bearing platform, and a transverse drainage facility is arranged in the second-grade broken stone hardcore. The invention further discloses a construction method of the bridgehead roadbed composite structure. According to the bridgehead roadbed composite structure, the bearing capacity characteristic of the roadbed is changed, the effect of road surface loads on the roadbed is reduced, the bearing capacity and strength of the roadbed are enhanced, and differential settlement of the roadbed is reduced; a bridgehead roadbed drainage system is optimized, and roadbed water accumulation is effectively avoided; durability is good, and stability is high; construction is convenient, and generalization performance is high.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a composite structure and a construction method of a roadbed at the bridgehead to prevent vehicle jumping at the bridgehead. Background technique [0002] Bridge head jumping refers to the phenomenon that the wheels vibrate up and down when the car passes through the road section due to the settlement between the bridge culvert structure and the embankment behind the bridge culvert platform exceeding a certain limit value. This settlement phenomenon will affect the normal use of high-grade highways and people's overall evaluation of high-grade highways. At the same time, the up and down vibration of wheels will also affect driving safety, speed and comfort, as well as the service life of cars and bridges. [0003] Bridge head jumping is caused by the difference in settlement between the rigidly supported abutment and the relatively flexible filled embankment. To solv...

AI Technical Summary

Problems solved by technology

[0006] Due to the above-mentioned defects in the prior art, the present invention provides a bridge head subgrade composite structure that prevents vehicle jumping at the bridge head to solve the problems of vehicle jumping at the bridge head, insufficient bearing capacity of the bridge head subgrade, poor stability of the subgrade structure and complicated construction

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