Method for processing vehicle bump at bridge head of existing highway

Abstract

The invention discloses a method for processing vehicle bump at a bridge head of an existing highway, and the method comprises the following steps: mixing lightweight materials at a construction site; drilling holes from embankment slopes on both sides of the highway, and automatically discharging soil outward from a threaded opening while rotatably drilling holes; after a designed depth reaches, rotatably and slowly pulling out a drill rod, and starting a booster pump so as to pump the lightweight materials into the obtained drill holes by virtue of a central tube of the drill rod; and jetting the lightweight materials from the central hole of the drill rod so as to gradually fill the hole from bottom to top, thereby replacing the filled soil of an embankment. The drill holes are arranged squarely or quincuncially on the side slope of the embankment, a certain included angle is formed between each drill hole and a horizontal plane, and the elevation of the opening of each hole is positioned below a pavement structure layer and above the underside of the filled soil of the embankment. By using the method disclosed by the invention, the weight of the embankment is greatly reduced, thereby reducing the settlement after construction caused by embankment loads and then effectively solving the problem of vehicle bump at bridge heads. During the construction period, the highway is not required to be closed, therefore, the normal traffic of the highway is not affected. The method disclosed by the invention is simple in construction process, convenient to operate, simple in equipment, economical, and high in efficiency.

Description

[0001] technical field [0002] The invention belongs to the technical field of civil engineering, and in particular relates to a processing method for vehicle jumping at the bridge head of an existing expressway. Background technique [0003] my country's expressway construction is developing rapidly, and most of my country's expressways are located in the eastern coastal areas. There are a lot of soft soil foundation problems in the construction of expressways in coastal areas. In the construction of expressways in soft soil areas, it is necessary to solve the problem of uneven settlement of the roadbed, which is especially important at the bridgehead. my country's "Code for Design of Highway Subgrade" (JTG D30-2004) stipulates that the post-construction settlement of the general road section is less than 30cm, the post-construction settlement of the bridge head transition section is less than 20cm, and the post-construction settlement of the bridge head section is less th...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the above-mentioned defects, and to provide a one-time solution to the problem of car jumping at the bridge head of the existing expressway, and a processing method for the car jumping at the bridge head that does not affect the normal use of the expressway during construction.

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