GeoTechHub Engineering Technology

Airfield Pavement Designer

Professional airfield pavement screening, calibrated rigid pavement design, multilayer foundation evaluation, and existing pavement remaining-life analysis.

Engineering technology for airfield and geotechnical practice
Rigid Multilayer Support v0.2.2 Professional Report Rev 2 Dry / Wet Comparison Exact Benchmark Presets API Version: not checked

Test Presets and Engine Mode

Manual inputs are available below. Exact calibrated benchmark presets automatically use the raw JSON payload so the complete aircraft fleet is preserved.

Manual flexible regression is loaded.
Pavement Type
Rigid Analysis Mode

Project and Analysis Controls

Core design period, traffic, and solver controls.

New Design Solver
Existing Pavement Evaluation

Pavement Structure

Physical and structural layer properties. Layer roles control structural credit.

Asphalt Surface
Base
Subbase
PCC Slab
Structural Base
Drainage Layer
Treated Subgrade / Subbase
Optional Asphalt Overlay
Rigid Foundation Model
Natural Subgrade

Water and Drainage

Dry and wet support conditions are evaluated automatically.

Aircraft Fleet

Six manual rows are provided. Exact benchmark presets preserve the complete fleet through raw JSON mode.

AircraftAnnual OpsOperationWeight %P/C RatioUse FactorPasses

Advanced Payload Testing

Use this section to run an exact calibration payload or inspect the JSON generated from manual inputs.

Engineering Status
Analysis Mode
Governing CDF
Controlling Aircraft
Capacity Margin
Rigid Stress Ratio
Water Severity
Benchmark CheckManualNo exact target selected
Calculated PCCNew design calculated thickness
Recommended PCCRounded construction thickness
Remaining LifeExisting pavement mode
Engine VersionBackend calculation version

Professional Pavement Design Report and Data Export

Generate a GeoTechHub-branded pavement design report with engineering references, LaTeX-style formulas, calculation trace, assumptions, limitations, and audit record; then print to PDF or export the analysis data.

Run an analysis to generate an audit identifier.

Rigid Foundation Response

Calculated support transformation and structural layer influence for the governing condition.

Input kpci
Effective k
Base Stress Factor
Interface

Pavement Section and Water Influence

The schematic includes optional overlay and drainage layers from the normalized input.

Interactive Engineering Charts

Hover over the plots to inspect calculated values.

Rigid Sensitivity and Damage Diagnostics

These curves use the same calibrated alpha response and show how thickness, design life, and aircraft response affect the result.

Aircraft Damage Results

Governing-condition aircraft damage and rigid response details.

Water and Foundation Details

Dry/wet reduction factors and multilayer foundation response.

Calculation Transparency and Applicability

Governing-aircraft substitutions, response factors, calibration-envelope checks, and audit information.

Governing Equation Trace

Recommendations and Warnings

Backend interpretation and model warnings.

Raw API Response

Useful for confirming response fields and diagnosing frontend issues.

Open complete response JSON

Ready for Frontend Testing

Load a preset or enter project values, then run the analysis. Start with the exact benchmark presets to verify the v0.2.2 engine.

Recommended sequence: exact flexible regression, Rigid Design Benchmark A, Rigid Design Benchmark D, Existing Remaining-Life Benchmark 1, and Existing Remaining-Life Benchmark 2.

Reference Formulas and Model Notes

Key response, support, traffic, and damage concepts used in the alpha engine.

Wheel Load

Pw = W Fm / Nw

Contact Radius

a = sqrt[Pw / (pi pt)]

Cumulative Damage

CDF = sum(ni / Ni)

Rigid Relative Stiffness

l = [Ec h3 / 12(1 – v2)k]1/4

Rigid Stress Ratio

SR = sigmaPCC / MR

Effective Coverages

C = Ops x Use x Passes / (P/C)

Wet k-Value

kwet = Rk kdry

Thickness Design

Find h such that CDFgoverning is less than or equal to target

Remaining Life

Find t such that CDFgoverning(t) = 1.0
Engineering limitation: Version 0.2.2-alpha is a Benchmark-calibrated mechanistic-empirical surrogate for screening, sensitivity analysis, preliminary design comparison, and software development. It is not an FAA-approved replacement for FAARFIELD. Project-specific aircraft, material, geotechnical, drainage, and operational inputs require independent engineering verification.