In Murfreesboro, the Slopes & Walls category addresses stability challenges driven by the region’s weathered limestone, chert, and residual clay soils—formations highly susceptible to seasonal saturation and erosion. Our approach integrates slope stability analysis compliant with IBC Chapter 18 and Tennessee Stormwater Management guidelines, ensuring every assessment accounts for local drainage patterns and bedrock variability. For projects requiring lateral restraint, we apply active/passive anchor design grounded in FHWA-IF-99-015 methodologies to secure both temporary and permanent systems.
Typical applications span roadway widening through karst terrain, residential cuts on the city’s rolling topography, and commercial basement excavations near existing structures. These scenarios demand rigorous retaining wall design—whether cantilever, MSE, or soil-nail walls—paired with anchor systems to manage surcharge loads and preserve right-of-way. By combining geotechnical investigation with localized construction experience, we deliver solutions that minimize long-term deformation risk in Murfreesboro’s variable subsurface.
Full design of active prestressed anchors for soldier pile and secant pile walls, including bond length calculation, tendon sizing, and lock-off load specification per PTI DC35.1.
Design of passive inclusions for top-down excavation support in stiff residual clays, with pullout capacity verified through field testing.
Performance, proof, and extended creep tests executed with calibrated hydraulic jacks and digital load cells, documenting load-displacement behavior.
Specification of encapsulation systems for aggressive groundwater environments, including epoxy-coated strand, corrugated sheathing, and post-grouting details.
PTI DC35.1-14: Recommendations for Prestressed Rock and Soil Anchors, FHWA Geotechnical Engineering Circular No. 4: Ground Anchors and Anchored Systems, ASTM A416/A416M: Standard Specification for Low-Relaxation, Seven-Wire Steel Strand for Prestressed Concrete, IBC 2021 Chapter 18: Soils and Foundations, OSHA 1926 Subpart P: Excavations
For a project with 20 to 40 anchors, the combined design, submittal preparation, and field testing program typically ranges from US$970 to US$3,520, depending on the number of verification tests required and the complexity of the corrosion protection system specified.
Active anchors are prestressed after installation to apply a known force to the structure before any soil movement occurs; passive anchors develop their force only as the ground deforms. In Murfreesboro excavations deeper than 15 feet, active tiebacks are generally preferred because they limit lateral wall deflection to under 1 inch, which protects adjacent utilities and pavements.
With proper corrosion protection, a Class I anchor system can have a design life exceeding 75 years. The primary threat in this region is not uniform corrosion but pitting attack where acidic groundwater contacts exposed steel in imperfectly grouted zones, which is why the design emphasizes centralized tendon placement and post-grouting of the bond length under pressure.
The minimum dataset includes SPT N-values and recovery ratios through the bond zone, unconfined compression tests on rock core, drained direct shear tests on undisturbed clay samples, and groundwater pH and resistivity measurements. Where the bond zone is in weathered limestone, a downhole camera survey of at least one borehole is recommended to identify open joints or cavities that could cause grout loss during installation.
We serve projects across Murfreesboro and its metropolitan area.