Method for controlling settlement by horizontally drilling at embankment and injecting light weight replacing material under normal traffic circumstance

Abstract

The invention discloses a method for controlling settlement by horizontally drilling at embankment and injecting a light weight replacing material under the normal traffic circumstance, which is characterized in that: the slope embankment on one side or two sides of roadbed is drilled transversely by a drilling or chiseling pore-forming technique, holes lean a certain angle downwards so as to inject the light weight material; and the light weight material is injected into the holes, and then is solidified in the holes to form the light weight replacing material. A sleeve is also placed into the holes firstly, and then the light weight material or a non-backfill material is injected into the sleeve, so that pore-forming quality is ensured and the diffusion of the light weight material is avoided. The road does not need to be sealed, a pavement structure layer and an upper accessory structure cannot be damaged, and the normal traffic cannot be influenced.

Description

technical field [0001] The invention relates to a method of drilling or chiseling holes horizontally along the embankment under the normal traffic conditions of the roadbed engineering, and filling the holes with light materials to reduce the load of the original roadbed, so as to control the subsequent settlement of the soft foundation of the roadbed that has been opened to traffic. The method does not need to close the road, does not damage the pavement structure, and does not affect the normal traffic. Background technique [0002] At present, roadbed projects such as roads and railways in my country are mostly built in coastal provinces, Yangtze River Delta, and Pearl River Delta areas with rapid economic development. The foundation soil in these areas usually has high water content, high compressibility, poor permeability, high sensitivity, and low strength. And the characteristics of uneven thickness. Excessive post-construction settlement is one of the common diseases...

AI Technical Summary

Problems solved by technology

The purpose of grouting reinforcement is to strengthen the shallow soft foundation or the upper subgrade to control the settlement. It is difficult to inject grout into the relatively hard soil layer when the soft soil is deep, and it is also difficult to inject grout into the center of the embankment when the subgrade is wide. At the same time, grouting to strengthen the foundation, such as improper grouting pressure or process control, can easily lead to uneven grouting, resulting in waves on the road surface, etc.

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