RC
Roshan Chaulagain, P.E.
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Geotechnical Engineering • Subsurface Investigation • Foundation Design

Roshan Chaulagain, P.E.

Geotechnical Engineer with a dual academic foundation in Geology (B.S.) and Civil Engineering (M.Eng.) from UT Arlington. Experienced across 80+ TxDOT, NTTA, County, and Aviation infrastructure corridors across Texas—specializing in bridge drilled shafts, MSE & soil-nailed retaining walls, slope stability, high-fill embankments, dynamic pile testing (PDA/CAPWAP), and expansive clay pavement design.

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RC

Roshan Chaulagain, P.E.

Staff Geotechnical Engineer • Corsair Consulting, LLC

M.Eng. Civil Engineering • B.S. Geology (UT Arlington)

Representative Texas Boring Log ProfileTex-132-E (TCP)
0–12 ft

Stratum I: Expansive Fat Clay (CH) — Qal / Qt

PI = 38–52 • Active PVR Zone (Tex-124-E)

12–28 ft

Stratum II: Weathered Calcareous Shale (Kef / Ktm)

TCP: 35–75 blows/ft • Skin Friction Zone

28–65 ft

Stratum III: Competent Austin Chalk / Limestone (Kau)

TCP: < 2.5" / 100 blows • Drilled Shaft Rock Socket

Infrastructure Projects

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TxDOT, NTTA, County & Aviation corridors

Borehole Footage Logged

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Cumulative soil & rock core drilling logged

Active TxDOT Districts

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Regional coverage across Texas formations

Core Specializations

6

Bridges, Walls, Slopes, Embankments, Pavements, Culverts

Technical Capabilities

Geotechnical Engineering Workflows & Practice Areas

Comprehensive subsurface investigation, laboratory program design, and analytical modeling across six core transportation and civil structure categories.

TxDOT Item 416 / AASHTO LRFD

Bridges & Deep Foundations

Drilled Shafts, Driven Piles & PDA/CAPWAP

Axial and lateral capacity analysis (WinCore TCP, LPILE, SHAFT), scour evaluation, dynamic pile load testing (PDA-8G / CAPWAP), and rock socket design in Texas chalk, limestone, and shale.

TxDOT Item 423 / FHWA Standards

Retaining Walls

MSE, CIP Cantilever, Soil Nail & Drilled Shaft Walls

External and internal stability analysis, bearing resistance, strap length schedules, settlement mitigation, and global slope stability modeling for cut and fill corridor walls.

Target FS ≥ 1.5 Permanent

Slope Stability & Landslides

Cut/Fill Slopes, High-PI Clays & Rapid Drawdown

Short-term undrained, long-term effective stress, and Fully Softened Shear Strength (FSSS) limit-equilibrium modeling (Slide2 / GSTABL) for highway cuts, bluffs, and detention basins.

TxDOT Item 132 Density Control

Roadway Embankments

High-Fill Settlement & Bridge Approach Transitions

Immediate and primary consolidation settlement (Settle3), embankment fill material specifications (Item 132), and surficial sloughing mitigation in expansive clays.

Tex-124-E / Item 260 & 275

Pavements & Subgrade Stabilization

PVR (Tex-124-E), Sulfate Heave & Lime/Cement Design

Potential Vertical Rise (PVR) reduction, soluble sulfate screening (Tex-145-E), lime/cement series (Tex-121-E / Tex-120-E), and flexible/rigid structural pavement design (FPS 21).

TxDOT Item 462 & 466

Culverts & Drainage Structures

Multi-Barrel Box Culverts (RCBC), Wingwalls & Scour

Allowable foundation bearing pressure at invert elevation, differential settlement along culvert barrels, parallel/flared wingwall earth pressures, and OSHA excavation safety.

Career Trajectory

Professional Experience

Geotechnical consulting, field exploration, deep foundation testing, and academic background.

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Staff Geotechnical Engineer

Current Role

Corsair Consulting, LLC • Texas, United States

Full-Time • Geotechnical & Materials Engineering
  • Directed and executed subsurface geotechnical investigations across 80+ transportation and municipal infrastructure projects spanning 22 TxDOT Districts, NTTA corridors, counties, and regional airports.
  • Logged and supervised over 13,000+ linear feet (530+ test borings) of soil and rock core drilling across diverse Texas geologic formations (Austin Chalk, Eagle Ford Shale, Woodbine, Taylor Marl, Edwards Limestone, Alluvium).
  • Performed comprehensive geotechnical engineering analyses and authored Geotechnical Investigation Reports (GIR) for multi-span bridges, up to 37+ MSE/CIP/Soil-Nailed retaining walls per corridor, high-fill embankments, and box culverts.
  • Conducted deep foundation dynamic testing (Pile Driving Analyzer® PDA-8G & CAPWAP software), SPT automatic hammer energy calibrations, and pavement PVR / lime-sulfate stabilization designs.
WinCore (TCP)LPILE & SHAFTSlide2 / GSTABLPDA-8G & CAPWAPTex-124-E PVRFPS 21Borehole Staking & Logging

Graduate Engineering & Geological Researcher (M.Eng. Civil / B.S. Geology)

Education & Research

The University of Texas at Arlington (UTA) • Arlington, Texas

Academic & Applied Subsurface Research
  • Completed Master of Engineering in Civil Engineering (Geotechnical Engineering concentration) and Bachelor of Science in Geology at the University of Texas at Arlington.
  • Awarded the Spindletop Oil & Gas Co. Undergraduate Fellowship in the Department of Earth and Environmental Sciences.
  • Integrated structural geology, stratigraphy, and advanced soil/rock mechanics to characterize expansive North Texas clays, overconsolidated Cretaceous shales, and karstic limestone formations.
Advanced Soil MechanicsFoundation EngineeringSlope StabilityTexas StratigraphyRock Mechanics
Qualifications

Education, Licensure & Technical Certifications

Academic Degrees

The University of Texas at Arlington (UTA)

Master of Engineering in Civil Engineering

The University of Texas at Arlington

Bachelor of Science in Geology

The University of Texas at Arlington

Licensure & Specialized Deep Foundation Training

Professional Registration & Dynamic Testing

Professional Engineer (P.E.) — Geotechnical / Civil

State of Texas (TBPELS) • Infrastructure & Foundation Engineering

Active

Pile Driving Analyzer® (PDA-8G), CAPWAP & PDA-S Operation

Pile Dynamics, Inc. (PDI) & GRL Engineers, Inc. • Dynamic Foundation Testing

Certified
Project Experience Record

Representative Geotechnical Projects

Filterable portfolio of TxDOT highway corridors, bridges, MSE walls, NTTA tollways, county roads, and aviation projects.

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Geographic Footprint

Interactive Texas Geotechnical Map

Click any marker to inspect public technical scope, geological formation, and district details.

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