High-polymer grouting reinforcement anti-settlement widened roadbed

Abstract

The invention discloses a high-polymer grouting reinforcement anti-settlement widened roadbed, which is characterized in that a geotechnical pipe network is installed; the geotechnical pipe network is a rectangular grid which is formed by PVC (polyvinyl chloride) pipes in array distribution; the PVC pipes in the rectangular grid communicate with each other; grouting holes and exhaust holes which upwards and convexly extend, and slurry passing holes which downwards and convexly extend are formed in the geotechnical pipe network; the geotechnical pipe network is laid in a soil filling layer to form a soil filling layer geotechnical pipe network; high-polymer slurry is injected into the soil filling layer geotechnical pipe network through the grouting holes to form a soil filling layer grouting geotechnical pipe network; the high-polymer slurry is injected into vertical column holes in the soil filling layer through the slurry passing holes to form vertical reinforcing columns. The transverse connection of new and old roadbeds is enhanced; the differential settlement is effectively controlled; the combination of new and old roadbeds is more stable and firmer; sliding collapse cannot easily occur.

Description

technical field [0001] The invention relates to embankment widening in road widening and reformation, more specifically to a kind of high polymer grouting reinforcement anti-settling widening roadbed. Background technique [0002] With the continuous and rapid development of the national economy, the demand for road transportation in my country is increasing year by year, and the traffic flow of some existing roads has reached saturation. development needs. [0003] Roadbed widening is the main way to expand the capacity of existing highways. Due to the differences and interactions between the new and old subgrades, road diseases caused by widening of subgrades and overall pavement performance degradation are quite common in practical engineering, seriously affecting driving safety and comfort. In the prior art, the main problems of embankment widening include: [0004] 1. Differential settlement: Under the action of the old embankment's self-weight load, the settlement of...

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Problems solved by technology

However, a potential sliding surface will be formed after excavating the steps, which may cause lateral sliding of the widened part of the subgrade;

[0006] 3. Slope landslides: After the filling of new embankments is completed, for those with high slopes or large slopes, the slope protection measures should not be prone to landslides immediately

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