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Geotextile Filter & Piping Check Calculator – USCS Criteria for River Bank Protection

Geotextile Filter & Piping Check – USCS Criteria for River Bank Protection

Geotextile Filter & Piping Check Calculator

USCS filter criteria · Piping risk assessment · Soil profile · Geotextile type recommendation

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📐 1. Geotextile Filter Design & Piping Prevention

Geotextile filters are used in river bank protection, retaining walls, and drainage systems to prevent soil erosion while allowing water flow. The USCS (US Army Corps of Engineers) criteria require that the geotextile's opening size (O95) and permeability satisfy both retention (O95 ≤ D85) and permeability (O15 ≥ D15). Failure leads to piping – internal erosion that causes structural collapse.

Retention criterion: O95 ≤ D85
Permeability criterion: O15 ≥ D15
Piping risk: high if O95 > D85 or permeability too low.

🚀 2. Live Filter & Piping Check

✅ CSV: D15, D50, D85, O95, O15

📊 2D Soil Profile & Filter Placement

📊 Filter Criteria Comparison

📈 Piping Risk Trend & History

📂 3. How to Use the Calculator

  1. Enter soil gradation – D15, D50, D85 (from sieve analysis).
  2. Enter geotextile opening sizes (O95, O15) if known; otherwise leave zero for auto‑suggestion.
  3. Select filter type or let the tool recommend based on criteria.
  4. Compute: Click "Check Filter" – tool checks retention and permeability criteria, and calculates piping risk.
  5. 2D soil profile shows soil layers and filter placement.
  6. Batch CSV: Upload multiple soil samples for bulk analysis.
  7. PDF Report: Download a report with the profile image.
  8. History: All calculations saved locally; export or clear anytime.

📈 4. Real‑World Example

River bank protection, Bangladesh
D15=0.3 mm, D50=0.8 mm, D85=2.0 mm.
Recommended: non‑woven geotextile with O95≈0.5 mm, O15≈0.2 mm.
Retention: 0.5 ≤ 2.0 → OK. Permeability: 0.2 ≥ 0.3 → not quite → use thicker fabric.

❓ Frequently Asked Questions

❓ What is piping and why is it dangerous?
Piping is internal erosion where soil particles are washed through filter openings, causing voids and eventual collapse. Our riprap design tool works with this filter check.
❓ How to choose between woven and non‑woven?
Woven (monofilament) has larger openings, better for drainage; non‑woven (needle‑punched) has better retention. The tool suggests based on your soil.
❓ Where can I find soil gradation data?
From laboratory sieve analysis. For preliminary estimates, see typical values in our soil database.

🌐 Industry Standards & References

USACE Filter Criteria | ASTM D4751 (Opening Size) | IGS – Filter Guidelines

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© ERH Geotextile Filter Check – Based on USCS criteria (EM 1110-2-1901). For preliminary engineering.
GeoFilter Pro – Enterprise Geotextile Design & Piping Suite

GeoFilter Pro

Enterprise Hydraulic Filter Synthesis & Internal Piping Risk Analyzer (USACE EM 1110-2-1901 Ruleset)

Soil & Geo Parameters
Geotextile Envelopes
Real-time Seepage & Core Particle Transport Physics
Semi-Logarithmic Sieve Particle Distribution Curve
Structural Compliance Logs
Evaluating Matrix...
RETENTION BOUND (O95)Checking
Evaluates piping barrier limits preventing macro migrations.
PERMEABILITY CONSTRAINTChecking
Evaluates dynamic drainage to safely drop exit hydraulic gradient.
CLOGGING CAKE RATIOChecking
Verifies cross-flow openings prevent particle pore blocking.
Cu = 0.00 | Cc = 0.00
Awaiting execution data parameters...

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