Treatment method and structure of bridge-head foundation sliding settlement

Abstract

The invention discloses a treatment method of bridge-head foundation sliding settlement. The method includes the steps: a, arranging strengthening piles; b, grouting settlement positions of a highway pavement. At least one row of strengthening piles are arranged on a bridge-head conical protection slope close to a slope base, the bottoms of the strengthening piles are at least embedded into a 0.5m position below a supporting layer of a foundation, and the tops of the strengthening piles are not exposed to the protection slope. After the strengthening piles are stabilized, holes are vertically drilled downwards on a pavement shearing and sliding band, the depths of the drilling holes penetrate the pavement shearing and sliding band, grouting is performed after the holes are drilled, and grouting includes reinforcement grouting and displacement grouting. On one hand, shearing and sliding of highway side slopes and bridge-head circular arc conical slopes can be prevented, on the other hand, the highway foundation can be reinforced, the pavement is lifted, the influence of driving on a highway is low as a construction period is short, and the treatment method is applicable to solving the problem of bridge-head bumping of pavement settlement caused by lateral sliding of bridge-head roadbeds.

Description

Technical field [0001] The invention relates to a treatment method and structure for slippage type settlement of bridgehead roadbed. Background technique [0002] my country’s expressways are developing rapidly, but they started late, with limited technical level and maintenance experience, and most roadbeds and pavements have problems. In the southern mountainous area, due to the restriction of topography and geological conditions, many sections of the expressway need to be bridged. After opening to traffic, the phenomenon of vehicle jumping at the bridge end has become a major disease of the road, which is manifested by the misalignment of the road and bridge junction or the connection of the slab and the road surface. If there is a wrong platform, there will be obvious bumps when driving through, and it is easy to cause traffic accidents in severe cases. The main reason is that due to the settlement of the subgrade, there is a staggered platform between the subgrade and the a...

AI Technical Summary

Problems solved by technology

However, during the grouting process, pressure grouting is generally used, which will laterally squeeze the conical slope of the bridge head or the side slope of the road, and generate a lateral thrust, resulting in secondary settlement of the road surface

Therefore, for the treatment of vehicle jumping at the bridge head in the current expressway, there are few methods that take into account the slippage of the bridge head slope protection

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