Abutment back reinforcement design method for preventing and treating defect of vehicle bumping at bridge head

Abstract

The invention discloses an abutment back reinforcement design method for preventing and treating the defect of vehicle bumping at a bridge head. The abutment back reinforcement design method comprises the following steps that S1, settlement calculation is conducted with a layered settlement calculation method according to the condition whether a foundation at an abutment back is subjected to reinforcement treatment or not, and the post-construction settlement amount of the position close to an abutment and the post-construction settlement amount of the position away from the abutment are calculated; S2, geogrids of which the integrity and the durability are good and the strength meets the requirement are preliminarily selected by combining the filling height of the abutment back and the mass of backfill materials according to the predicted post-construction settlement value obtained through calculation; S3, according to the structure of the abutment, an anchoring area and a turn-up area of the geogrids are determined, and the interval between every two adjacent layers of geogrids under the anchoring and turn-up conditions of the geogrids is calculated; S4, the paving length of the geogrids is calculated; and S5, treatment is conducted by only paving the geogrids or paving a combination of the geogrids and short butt straps according to the conditions of the bridge head foundation and a bridge head roadbed. According to the abutment back reinforcement design method for preventing and treating the defect of vehicle bumping at the bridge head, not only is the problem caused by geogrid anchoring solved, but also the defect of vehicle bumping at the bridge head can be overcome or relieved.

Description

technical field [0001] The invention relates to the field of road engineering, in particular to a design method for abutment back reinforcement for preventing and treating vehicle jumping at bridgeheads. Background technique [0002] In the design and construction of road and bridge engineering, due to the improper selection of backfill materials, insufficient construction compaction, and inadequate foundation treatment in the backfill project of bridge and culvert structures, there are differences between the abutment and the backfill of the abutment. Subsidence, which in turn led to the disease of vehicle jumping at the bridge head, which is a serious problem affecting the normal use of the road. The uneven settlement between road bridges ranges from several centimeters to one meter, which will not only increase the wear and tear of driving vehicles and structures, seriously deteriorate the service life of structures, but also cause driving discomfort and increase Big dri...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for preventing and controlling vehicle jumping at the bridge head, which can effectively prevent and slow down the occurrence of vehicle jumping at the bridge head, aiming at the limitations and defects of geogrid reinforcement in the prior art to treat uneven settlement of roads and bridges. The design method of the table back reinforcement

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