High-fill roadbed bridgehead bumping prevention structure

Abstract

The invention discloses a high fill roadbed bridgehead bumping prevention structure, which mainly relates to the technical field of roads and bridges, and comprises a bridge abutment and a beam plate,the beam plate is arranged on one side of the bridge abutment, and a structural cross beam is arranged on the other side of the bridge abutment, is arranged on a foundation roadbed, is close to the bridge abutment from the outside and is distributed in a step shape. The structural cross beam is provided with ear hooks, guide blocks and inserting grooves, a frame shear structure is arranged on thestructural cross beam, the frame shear structure comprises an upper concave-convex bearing plate and a lower concave-convex bearing plate, the upper concave-convex bearing plate and the lower concave-convex bearing plate are connected through a supporting tie bar, and an anti-bending rib for supporting the concave-convex bearing plate on the supporting tie bar is arranged on the supporting tie bar. A backfill layer is arranged in the frame shear structure, and a gravel layer, a hard soil layer and an asphalt pavement layer are sequentially arranged on the frame shear structure.

Description

technical field [0001] The invention mainly relates to the technical field of roads and bridges, in particular to an anti-jumping structure at the bridge head of a high-fill soil subgrade. Background technique [0002] With the sustained and steady growth of my country's national economy, expressway construction has also entered a period of rapid development. The completion and use of expressways have played an important role in promoting the country's economic construction and alleviating the pressure of other transportation. However, it should also be noted that with the extension of use time, the continuous increase of traffic volume, and the increase of load capacity, many problems have appeared in the operation of expressways, and bridge head jumping is one of the most common problems. [0003] Bridge head jumping is a common problem in road traffic. Bridge head jumping is caused by the settlement of the bridge head and the embankment at the junction of the bridge and ...

AI Technical Summary

Problems solved by technology

[0003] Bridge head jumping is a common problem in road traffic. Bridge head jumping is caused by the settlement of the bridge head and the embankment at the junction of the bridge and the embankment, which leads to the misalignment of the bridge head, which seriously affects the driving safety, accelerates the bridge and road surface diseases, and affects the damage of road bridges. The operation has a great impact, especially in places with soft soil foundations and high roadbeds, vehicle jumping is more serious, which brings great hidden dangers to driving

The serious phenomenon of vehicle jumping at the bridge head will not only greatly increase the discomfort of driving, but also cause the vehicle to decelerate significantly and accelerate the damage of bridges, roads and vehicles. The serious vehicle jumping phenomenon will cause the vehicle to lose control and easily cause traffic accidents.

[0004] It is a more effective and economical comprehensive treatment method to prevent vehicle jumping at the bridge head by setting up the strap and adding braces under the strap to increase the stiffness of the foundation. Reinforcement is also mostly based on experience. Therefore, it is difficult to determine the actual mechanical performance, especially the deformation performance, of the slab under the load of the vehicle, which is not conducive to taking targeted measures to prevent vehicle jumping at the bridge head

Moreover, there is a lack of systematic and in-depth research on the use effect and stress-deformation performance of the slabs under different support conditions.

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