Doan Lap to Han Bridge, National Highway
Rapid construction, lasting impact solution
The connection route, a major road from Hai Phong city to Thai Binh province, has sustained damage over time, and requires renovation to accommodate increasing traffic demand and heavy trucks.
Benefits:
- Proven savings with an 8% reduction in construction time compared to conventional solutions
- Reduction of granular materials by 25% in pavement construction
- Ease of installation with Tensar geogrid
The impact of vehicle and construction machinery loads caused the designed pavement life to be reduced greatly. This led to a badly damaged road which required immediate rehabilitation. The investor wanted a rapid solution to replace the original design because this route forms the arterial road with busy traffic. Due to the impact of vehicle and construction machinery loads, the road performance is not guaranteed with the original calculation.
Design consultant had selected Tensar mechanically stabilised layer (MSLs) using stabilisation geogrid to replace the traditional method of excavating the old pavement and backfill with 30cm Type II aggregate base stone. The proposed solution significantly reduced both construction time by 8% and base/ subbase materials by 25%, while also extending the pavement’s lifespan.
