00478085

Component

http://onlinepubs.trb.org...trr/1988/1159/1159-003.pdf

https://scholar.google.co...psey&publication_year=1988

A study was conducted to determine the core flow-capacity requirements of geocomposite fin-drain materials used in pavement subdrainage. The study consists of a laboratory testing program, field subdrainage outflow studies, and analysis of all data to define the fin-drain core flow-capacity requirements. Six different fin-drain materials were tested in a 24-ft-long laboratory channel to establish their core flow properties. The tests were conducted at three different entrance heads (6.3 in., 12.3 in., and 18.4 in.) and at slopes of 0, 1, 2, 3, and 4 percent. Field subdrainage outflow data were obtained from two test sites in Illinois. These data are presented in terms of volume of outflow as a function of time. The data were collected by use of tipping-bucket flow meters. A comparison was made between the observed core flow capacity of the fin-drain materials in the laboratory and the flow volume observed from field subdrainage systems. Based on this comparison, it was indicated that geocomposite fin-drain systems will be required to provide flow zone capacities in excess of 150 gal/hr at 0 percent pavement gradient and in excess of 200 gal/hr at gradients of 1 percent or greater to compare with a standard pipe and sand envelope system. When compared with a more permeable aggregate envelope system or a high-performance fin-drain system, flow zone capacities in excess of 200 gal/hr to 300 gal/hr may be desirable depending upon the pavement gradients and the number and size of joint and crack openings. Based on faulting measurements, it is indicated that a fin-drain subdrainage system can improve pavement performance to a level equivalent to or better than that for some standard systems.

This paper appears in Transportation Research Record No. 1159, Prefabricated Vertical Drains and Pavement Drainage Systems. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01416410

p. 21-29

1988

Transportation Research Record

0309046688

Figures (19) ; References (6) ; Tables (3)

Field studies; Flow; Laboratory tests; Pavement performance; Subsurface drainage

Capacity

Geotechnology; Highways; I42: Soil Mechanics

TRIS, TRB

Dec 31 1988 12:00AM

• DESIGN, CONSTRUCTION, AND EVALUATION OF WEST VIRGINIA'S FIRST FREE-DRAINING PAVEMENT SYSTEM
• EXPERIENCE WITH WICK DRAINS IN HIGHWAY CONSTRUCTION OVER SOFT CLAY--STORZ EXPRESSWAY, OMAHA, NEBRASKA
• HYDRAWAY EDGEDRAIN EXPERIENCE IN OHIO
• PERFORMANCE OF A PREFABRICATED VERTICAL DRAIN INSTALLATION BENEATH AN EMBANKMENT
• PERFORMANCE OF WICK DRAINS IN NEW ORLEANS CLAYS
• SUBBASE PERMEABILITY AND PAVEMENT PERFORMANCE