A Construction Method of High Polymer Grouting to Reinforce and Anti-Settlement Widening Subgrade

Abstract

The invention discloses a construction method of a high-polymer grouting-reinforced antisettling widened roadbed. The method is characterized by arranging a geotechnical engineering pipe network; the geotechnical engineering pipe network is a rectangular grid composed of PVC (polyvinyl chloride) pipes arranged in an array mode; the PVC pipes in the rectangular grid communicate with each other; the inside of the geotechnical engineering pipe network is respectively provided with a grouting hole and a vent hole which extend convexly upwards, and a grout passing hole which extends convexly downwards; the geotechnical engineering pipe network is laid in the fill stratum to form the fill stratum geotechnical engineering pipe network; the high-polymer grout is injected into the fill stratum geotechnical engineering pipe network through the grouting hole to form the fill stratum grouted geotechnical engineering pipe network; and the high-polymer grout is also injected into the vertical column hole formed in the fill stratum through the grout passing hole to form the vertical reinforcing column. The method enhances the lateral communication between the new and old road embankments, and effectively controls the differential settlement, so that the new and old roadbeds are combined more firmly and can not easily slump.

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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