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Location
LAMPANG, Thailand
Client
LAMPANG ROAD CONSTRUCTion center
project type
SOil nail & Shotcrete
CHALLENGES & INNOVATIVE SOLUTIONS
CHALLENGE
Limited ROW & Steep Slope Vulnerability
Highway construction within a restricted Right of Way (ROW) poses significant design and execution hurdles. For the Lampang Bypass Road project (Km. 4+075.00 to Km. 4+275.00 specifically), severe spatial limitations mandate the excavation of high-angle cut slopes. This creates critical safety and structural vulnerabilities that standard earthwork methods cannot resolve.
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Restricted Geometry: Inability to excavate standard, naturally stable slope gradients.
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Geotechnical Hazards: Elevated risk of steep slope failures, rockfalls, and mass wasting.
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Project Demands: Requires immediate engineering interventions that balance structural safety, rapid construction, and cost-effectiveness.
SOLUTION
Soil Nailing & Surface Protection Systems
To mitigate the risks associated with steep slope excavation, the engineering team at the Lampang Highway Construction Center designed a stabilization strategy utilizing artificial ground reinforcement. This approach provides a highly effective, budget-conscious resolution to topographical constraints while ensuring the long-term integrity of the embankment.
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Ground Reinforcement: Implementation of Soil Nailing and Rock Bolting to internally strengthen the soil and rock mass.
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Surface Protection: Application of a Shotcrete facing to prevent localized collapse and surface weathering.
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Technical Benchmarking: Documentation of this analytical and design framework to serve as a standardized reference for future constrained-ROW projects.
THE OUTCOME
Successful Execution of Engineered Slope Stabilization
Following rigorous slope stability analysis, a customized ground reinforcement system utilizing soil nails and a shotcrete facing was meticulously designed and successfully executed on-site. The completed construction effectively neutralizes the geotechnical risks associated with high-angle slope cuts within the constrained Right of Way (ROW). Ultimately, the project delivered a highly stable, long-term solution that ensures the structural safety of the highway while maximizing cost-effectiveness and construction efficiency.
3 - 6 m
Designed Depth of Nailing
10 cm
Shotcrete thickness
120 Days
Construction time
