Construction method for treating vehicle jump at bridge head in highway

Abstract

The invention discloses a construction method for treating a vehicle jump at a bridge head in a highway. The construction method comprises the steps of: subgrade treatment, base treatment and pavement construction, and concretely comprises the following steps of: A, adopting rammed earth or a light body material to tamp in a layering way at a abutment back, wherein the compaction depth of each layer does not exceed 20cm; filling each layer by 2-3m and tamping the level top surface of a roadbed by using a strong rammer to form a stable abutment back roadbed; B, fabricating a reinforced cement concrete slab which is equal to a bridge in width; paving the reinforced cement concrete slab and a base material on the abutment back roadbed in the layering way, so as to obtain a rigid-flexible intermediate layer with the reinforced cement concrete slab; and C, carrying out the pavement construction on the rigid- flexible intermediate layer on the bridge floor. The method is simple in construction method, low in cost, short in period, stable in foundation and long in service life, and the problem of the vehicle jump at the bridge head is effectively solved.

Description

technical field [0001] The invention relates to road engineering and bridge engineering, in particular to a treatment process for road bridge (culvert) heads, in particular to a construction method for treating vehicle jumps at road bridge heads. Background technique [0002] Vehicle jumping at the head of a highway bridge (culvert) is a worldwide technical problem. The main reason is that the bridge (culvert) abutment is a rigid structure with almost zero self-compression and basically no settlement; the backfill of the bridge head abutment and its foundation are Under the action of natural environment and load, large settlement occurred, which caused significant longitudinal slope changes at the bridge head. As a result, the phenomenon of jumping occurs when vehicles pass, which induces and aggravates bridge diseases, shortens the service life of vehicles, and affects traffic safety. [0003] In order to solve the technical problem of vehicle jumping at the bridgehead...

AI Technical Summary

Problems solved by technology

This transition subgrade can relieve the technical problem of vehicle jumping at the bridge head to a certain extent, but it has the following defects: (1) The construction process is complicated, and matching end supports need to be made alone. When the span of the reinforced concrete hollow slab exceeds 5m, it must It is necessary to make pile foundation supports; (2) From the construction point of view, due to the narrow construction space on the back of the abutment, the use of large compactors is limited, and it is very difficult to achieve the required compaction degree, so an under-compacted area is formed on the back of the abutment , which is also a potential reason for the large settlement at the bridge head. Even if the transition subgrade of the above patent is provided with pile foundation supports (middle support), it still cannot solve the problem of compaction of the abutment back

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