Geotextile: Key Materials for Quality Improvement of Expressway
In recent years, with the continuous growth of traffic flow and the improvement of road quality requirements, the construction and maintenance of expressways are facing higher challenges. The wide application of geotextile provides an effective way to solve these problems.
Geotextile began to play an important role in the early stage of expressway construction. In the subgrade treatment stage, it can play a good drainage and reinforcement effect. By rapidly discharging groundwater, the subgrade water content is reduced to improve the strength and stability of the subgrade. At the same time, the reinforcement of the geotextile can restrain the lateral displacement of the soil and enhance the integrity of the roadbed.
In the pavement construction, the geotextile can be used as a stress absorption layer to effectively reduce the generation of reflection cracks. For example, in the old road reconstruction project, a layer of geotextile is laid between the newly paved asphalt surface layer and the old pavement, which can alleviate the stress concentration caused by temperature change and vehicle load, and reduce the speed of crack expansion.
Not only that, the geotextile also plays an active role in the slope protection and greening of the expressway. It can prevent soil erosion, provide a stable basis for plant growth, and beautify the road environment.
In some special geological conditions, such as the collapsible loess area and the frozen soil area, the application of geotextile is even more indispensable. It is able to improve the foundation conditions and ensure the safe operation of the highways.
In short, geotextile, as an advanced engineering material, has become an indispensable part of the construction and maintenance of expressways, and has made an important contribution to improving the quality and durability of expressways.
