Performance Evaluation of Longitudinal Pipe Underdrains

Stein, Jeffrey S.; Dempsey, Barry J.

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https://hdl.handle.net/2142/46021 Copy

Description

Title

Performance Evaluation of Longitudinal Pipe Underdrains

Author(s)

• Stein, Jeffrey S.
• Dempsey, Barry J.

Issue Date

2004-10

Keyword(s)

Pavement Subdrainage, Drain Pipe, Edge Drains, Drainage Envelope, Geotextiles, Filters

Abstract

This research was conducted under four study phases. Phase 1 involved a full scale laboratory study to evaluate three different underdrain pipe and envelope systems. It was found that an open graded FA-4 envelope material without a geotextile wrapped pipe was a viable design option. In Phase 2 a study was conducted to relate the pipe slot size to the envelope gradation. A testing procedure was developed. A 2 mm pipe slot prevented FA-4 envelope material from passing into the pipe. In Phase 3 it was found that a modified FA-4 material with control of the 0.075 mm aterial could be produced which would have an acceptable saturated hydraulic conductivity value for good subdrainage performance. The study in Phase 4 was inconclusive in terms of selecting geotextiles that would not clog in subdrainage applications. Neither the Gradient Ratio Test nor the Hydraulic Conductivity Ratio Test identified conclusively whether soil-geotextile combinations would clog in the field.

Series/Report Name or Number

UILU-ENG-2002-2012

ISSN

0197-9191

Type of Resource

text

Language

en

Permalink

http://hdl.handle.net/2142/46021

Sponsor(s)/Grant Number(s)

Illinois Department of Transportation IHR-R25

Copyright and License Information

No restrictions. This document is available to the public through the National Technical Information Service, Springfield, Virginia 22161

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