Method and structure used for handling highway bridgehead bumping problem

Abstract

The invention provides a method and a structure used for handling a highway bridgehead bumping problem. According to the invention, based on road load and foundation conditions, a pile group variable-stiffness program satisfying bridgehead subsidence control requirements is designed. A foundation reinforcement treatment is carried out by using common bored piles, such that bearing capacity of shallow foundation is improved, and subsidence is reduced. Through the gradual reduction of pile length, pile diameter and pile density in a group pile foundation, group pile base heterogeneous distribution is realized, and group pile foundation stiffness smooth variation is formed. Compared with prior arts, with the method and the structure provided by the invention, the bridgehead bumping problem is effectively solved. Construction facility and construction process are simple. Construction cost is low. The requirement for group pile foundation pile strength is relatively low.

Description

technical field [0001] The invention relates to the field of prevention and control of vehicle jumping at bridgeheads of expressways, in particular to a method and structure for dealing with the problem of vehicle jumping at bridgeheads of expressways. Background technique [0002] With the construction and development of expressways in our country, vehicle jumping at bridgeheads shortens the service life of vehicles and affects traffic safety. Vehicle jumping at bridgeheads has become an internationally recognized traffic technical problem. Under normal circumstances, the foundation of the abutment does not settle, so the jumping at the bridge head is mainly due to the uneven settlement of the foundation, which leads to the wrong platform at the bridge head of the road, which will cause adverse effects or even damage to the road surface structure. Insufficient anti-vibration performance and unreliable filling will also lead to vehicle jumping at the bridge head. The root c...

AI Technical Summary

Problems solved by technology

[0005] The invention proposes a method and structure for dealing with the problem of car jumping at the bridge head of expressway, wherein the pile length, pile diameter and pile foundation density in the pile group foundation are all gradually reduced, and the piles and soil are closely combined to realize the pile group foundation and pile foundation. The rigidity of the abutment pile foundation is smooth and excessive, which solves the problem of vehicle jumping at the bridge head and also solves the problems of high strength requirements for long and short piles, complicated construction facilities and construction process, and relatively high construction costs in the existing method of dealing with vehicle jumping at the bridge head of expressways.

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