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Project Overview
The City of Pasadena entrusted Terratek Services Group (TSG) with a critical infrastructure project on Davis Street, a key roadway located in front of the Pasadena Police Department. The primary challenge was addressing the unstable subgrade, composed of high-moisture clay with poor load-bearing capacity. Without proper treatment, these conditions would have resulted in premature pavement failure, escalating maintenance costs, and long-term structural issues.
Additionally, the project required careful execution due to its high-profile location. As a central access route in front of a prominent civic building, it was vital to minimize disruptions while ensuring a stable foundation for the new concrete roadway. TSG was tasked with delivering a reliable, cost-effective solution to address these challenges and guarantee the longevity of the roadway.
Technical Evaluation
To design the most effective solution, TSG conducted a comprehensive evaluation of the existing soil conditions on Davis Street. The assessment revealed the high moisture content and low structural integrity of the clay subgrade as key concerns, jeopardizing the long-term durability of the planned concrete pavement.
After analyzing multiple stabilization techniques, lime slurry treatment emerged as the optimal method due to its ability to:
- Chemically alter clay properties to enhance strength and stability.
- Reduce moisture retention, mitigating expansion and contraction risks.
- Improve load-bearing capacity, creating a robust foundation for concrete paving.
This meticulous evaluation ensured the selection of a stabilization method that would deliver superior, long-lasting results.
Implementation Strategy
With a well-defined strategy, TSG executed a lime slurry soil stabilization process in three meticulously planned phases:
- Targeted Application
Lime slurry was evenly distributed across the roadway subgrade, penetrating problematic areas to ensure comprehensive coverage and maximum effectiveness. - Deep Mixing
The lime slurry was thoroughly blended with the existing soil, triggering a chemical reaction that improved soil strength, reduced plasticity, and minimized moisture retention. - Precision Compaction & Grading
The treated soil was compacted to achieve the required density, followed by precise grading to establish a smooth, stable foundation for the concrete roadway.
This structured approach allowed TSG to transform the unstable, moisture-prone subgrade into a durable, high-performance foundation capable of supporting heavy traffic loads for years to come.
Project Outcomes
The successful stabilization of the Davis Street subgrade resulted in a structurally sound, high-performance foundation for the new concrete roadway. The implementation of lime slurry stabilization effectively addressed all project challenges, delivering substantial long-term benefits.
Key project outcomes include:
- Superior Load-Bearing Capacity
The chemically stabilized subgrade met and exceeded engineering specifications, providing long-term durability under heavy traffic conditions. - Enhanced Moisture Resistance
Lime slurry treatment mitigated moisture retention, reducing the risks of soil expansion, contraction, and future pavement failure. - Cost-Effective & Sustainable Solution
By stabilizing the existing soil rather than replacing it, TSG delivered a low-maintenance, durable roadway foundation while minimizing material waste and project costs. - Seamless Project Execution
Despite the location’s critical nature, the stabilization process was completed on time and within budget, ensuring minimal disruption to city operations.
With an optimized subgrade now in place, Davis Street is fully prepared for the next phase of construction, ensuring a resilient and long-lasting roadway for the City of Pasadena.
Conclusion
The successful lime slurry soil stabilization on Davis Street reflects Terratek Services Group's (TSG) unwavering commitment to delivering innovative, cost-effective, and long-lasting infrastructure solutions. By addressing the challenges of an unstable subgrade with advanced stabilization techniques, TSG ensured the roadway could support future traffic demands while reducing maintenance costs.
This project not only improved soil strength and moisture resistance but also demonstrated lime slurry stabilization as a sustainable alternative to traditional soil replacement. The optimized subgrade now provides a solid foundation for the upcoming concrete pavement, significantly reducing the risk of pavement failure and extending the roadway’s lifespan.
By leveraging proven engineering methods and a client-focused approach, TSG continues to play a pivotal role in strengthening municipal infrastructure. With Davis Street now fully stabilized, the project exemplifies TSG's dedication to delivering high-quality, long-term solutions for urban development.
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