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Guoxin Jingjiang Power Plant Expansion
Reliable solution for difficult subgrade
Guoxin Jingjiang power plant expansion project worth 839 million yuan is the main energy project in the Jiangsu province of China. The site required an access road to carry construction traffic. Post construction this would then serve as the structural base of a permanent road.
Benefits:
- No downtime allows traffic immediately after compaction.
- Reduced construction cost by eliminating removal of USM and extending pavement life.
- Reduced carbon emission by reducing earthwork activities.
The construction site adjacent to the river has a high-water table and subgrade comprising a thick deposit of silty soil, with a low bearing capacity and high settlement potential. The original geosynthetic solution was underperforming, requiring deep replacement of existing unsuitable material (USM). The access road has to be built rapidly and safely to ensure the construction proceeds according to schedule, so the client sought a more economical alternative solution that would meet the deadline.
Tensar proposed a mechanically stabilised layer (MSL), using multiple layers of Tensar® InterAx® geogrid and crusher run aggregate, for the access road to overcome the subgrade challenge. The solution also helped to mitigate differential settlement, preventing crack propagation in future pavement construction. The reliable performance of the Tensar MSL reduced earthwork activities and ensured timely access to the construction site.
