Geotechnical Engineering, Soil Stability Testing, and Retaining Wall Safety Audits

Independent technical assessments for coastal concrete foundations, heavy stone retaining walls, and rock mass classification. No tourism, no real estate — only civil engineering safety parameters.

Rock Mass Classification

RMR and Q-system assessments for tunnel excavation through fractured granite and gneiss.

Soil Shear Strength Testing

In-situ SPT, CPT, and vane shear tests combined with triaxial and direct shear lab analysis.

Retaining Wall Safety Audits

Non-destructive structural evaluation of coastal concrete walls using GPR and core sampling.

Core Capabilities

Geotechnical Services & Field Testing

Applied engineering assessments for soil stability, rock mechanics, and coastal foundation safety.

01

Soil Shear Strength Testing

In-situ vane shear, SPT, and CPT soundings combined with triaxial and direct shear lab tests. Results inform bearing capacity and slope stability for deep foundations and excavations.

Typical depth range: 5–50 m
02

Rock Mass Classification

RMR and Q-system ratings from oriented core logging, borehole televiewer data, and discontinuity mapping. Used to design tunnel support, slope reinforcement, and excavation methods.

Fractured granite & sedimentary rock
03

Retaining Wall Safety Audits

Non-destructive GPR surveys, core sampling, and chloride ingress analysis for aging coastal concrete walls. Deliverables include crack mapping, reinforcement corrosion risk, and phased repair priorities.

40+ year seawall experience
04

Foundation Integrity Assessment

Pile integrity testing, cross-hole sonic logging, and low-strain impact echo. Verifies shaft continuity, detects anomalies, and estimates load capacity for driven and drilled shafts.

ASTM D5882 & D6760 compliant
05

Slope Stability Analysis

Limit equilibrium and finite element modeling for natural and cut slopes. Incorporates groundwater conditions, seismic loading, and reinforcement options like soil nails and anchored walls.

Factor of safety targets: 1.3–1.5
06

Coastal Concrete Durability

Rapid chloride permeability, petrographic examination, and half-cell potential mapping. Assesses corrosion risk and remaining service life for marine structures and heavy stone retaining walls.

AASHTO T277 & ASTM C1202

Geotechnical Service Packages

Standardized scopes for soil stability, rock mass, and wall safety audits.

Soil Shear Strength Suite

In-situ and lab testing for foundation design on alluvial, clay, or sand strata.

  • • SPT / CPT / vane shear field tests
  • • Triaxial & direct shear lab analysis
  • • Bearing capacity & settlement report
  • • 5–7 business day turnaround
Select Package

Rock Mass Classification

RMR / Q-system assessment for tunnels, slopes, and excavations in fractured rock.

  • • Oriented core drilling & televiewer
  • • Joint mapping & discontinuity analysis
  • • RMR & Q-value classification report
  • • Support recommendations (bolts, shotcrete)
Select Package

Retaining Wall Safety Audit

Non-destructive integrity check for coastal concrete and stone retaining walls.

  • • Ground-penetrating radar survey
  • • Core sampling & chloride ingress test
  • • Structural stability & crack assessment
  • • Prioritized repair & monitoring plan
Select Package

Why Engineers Trust Our Approach

Our methodology combines field-verified data with decades of structural geology practice. We don't guess — we measure, classify, and report with traceable precision.

Field-Validated Data

Not Lab Assumptions

Every soil shear strength report is backed by in-situ SPT, CPT, and vane shear tests — not generic tables. We correlate borehole logs with local geologic maps to catch anomalies before they become foundation risks.

Dual Classification Systems

RMR + Q-System

For rock mass assessments, we apply both RMR and Q-system classifications simultaneously. This cross-validation reduces uncertainty in tunnel support design and slope stability analysis.

Coastal Concrete Audits

Chloride & Corrosion Mapping

Retaining walls near saltwater face unique degradation. We combine ground-penetrating radar with chloride ion sampling to map rebar corrosion risk — not just surface cracks.

Why Not Generic Engineering?

Many firms rely on standard soil parameters from county maps. We drill, test, and classify on every site — even for small retaining walls. Our reports include explicit confidence intervals and alternative scenarios, so structural engineers can make informed decisions, not blind assumptions.

Related Technical Reports

Geotechnical case studies and structural assessments from recent field projects.

Coastal Retaining Wall Integrity Assessment – Marina Del Rey

Non-destructive testing and structural audit for a 40-year-old seawall

Comprehensive geotechnical evaluation using ground-penetrating radar and core sampling. The final report prioritized epoxy injection for cracks and cathodic protection for corroded rebar.

Read full report →

Soil Shear Strength Testing for High-Rise Foundation – Downtown LA

Geotechnical investigation for a 30-story mixed-use tower

In-situ and laboratory shear strength testing on alluvial soil. Results indicated deep pile foundations to a bearing stratum at 40 meters, with recommendations on pile type and settlement.

Read full report →

Rock Mass Classification for Tunnel Excavation – San Gabriel Mountains

Geotechnical assessment for a water conveyance tunnel

RMR and Q-system classification of fractured granite. Recommended rock bolts, shotcrete, and steel sets for variable conditions with RMR values from 40 to 75.

Read full report →
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