Transportation Infrastructure Solutions

1.Industry Pain Points & Challenges

In road and railway construction, contractors often face the following headaches:

(1) Uneven subgrade settlement: Insufficient bearing capacity of soft soil foundations leads to cracking, collapse, or rutting of the road surface under vehicle loads.

(2) High maintenance costs: Due to unstable foundations, frequent repairs are required after road delivery, severely depleting the subsequent operating budget.

(3) Excessive gravel layer thickness: To achieve the design strength, traditional solutions require a huge amount of gravel and filler, leading to a surge in procurement and logistics costs.

(4) Extreme weather effects: Freeze-thaw cycles cause displacement within the subgrade structure, damaging the road’s integrity.

2.System Solution Changfeng offers a multi-dimensional structural solution combining reinforcement, isolation, and drainage:

(1) Subgrade Reinforcement Layer: Biaxial geogrid is used to lock the crushed stone fill, forming a stable “rigid cushion layer” that effectively disperses vertical loads.

(2) Soft Soil Reinforcement System: For extremely soft foundations, geocells are used to provide lateral restraint and prevent lateral displacement of the fill material.

(3) Filtration and Isolation Layer: Nonwoven geotextile is laid to prevent mixing of materials between layers and ensure unobstructed drainage.

3.Core Advantages

(1) 40% Increase in Bearing Capacity: Actual measurements show that the bearing capacity of the reinforced subgrade is more than 40% higher than that of the unreinforced solution.

(2) 30% Material Cost Savings: Due to the significant increase in structural strength from the reinforcement layer, the thickness of the crushed stone fill can be reduced by approximately 30%.

(3) Extends service life by 2 times: Effectively inhibits reflective cracking, extending the road overhaul cycle by more than double and significantly reducing the total life cycle cost.

4.Case Studies & Related Products

Typical case: Solving the subgrade settlement problem in the Kenya National Highway Subgrade Enhancement Project (50,000㎡).