A construction method for polymer grouting to reinforce anti-subsidence high embankment and widen subgrade

Abstract

The invention discloses a construction method of a high-polymer grouting-reinforced anti-settlement widened roadbed. The construction method is characterized in that a geotextile pipe network is arranged, wherein the geotextile pipe network is composed of rectangular meshes formed by PVC pipes and arranged in an array, and the PVC pipes in the rectangular meshes are communicated with one another; grouting holes protruding upwards, exhaust holes protruding upwards and grout passing holes protruding downwards are formed in the geotextile pipe network; geotextile pipe network is laid in an earth fill layer to form an earth fill layer geotextile pipe network, high-polymer grout is injected into the earth fill layer geotextile pipe network through the grouting holes to form an earth fill layer grouted geotextile pipe network, and high-polymer grout is also injected into vertical column holes formed in the earth fill layer through the grout passing holes to form vertical reinforcing columns. Lateral linkage between a new embankment and an old embankment is enhanced, differential settlement is effectively controlled, binding of the new embankment and the old embankment is more stable, and slumping is not likely to occur.

Description

technical field [0001] The invention relates to a construction method for embankment widening in road widening and reconstruction, more specifically a construction method for high polymer grouting to reinforce and prevent subsidence to widen roadbeds. 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 o...

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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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