路基
岩土工程
土工布
毛细管作用
水分
工程类
含水量
润湿
土木工程
环境科学
材料科学
复合材料
化学工程
作者
John Stormont,R. Eric Pease,Karen S. Henry,Lynette A. Barna,Deb Solano
出处
期刊:NCHRP-IDEA Program Project Final Report
日期:2009-04-01
被引量:6
摘要
The overall purpose of this Innovations Deserving Exploratory Analysis (IDEA)project was to facilitate the transfer of the geocomposite capillary barrier drain (GCBD) technology to engineering practice through demonstration and documentation of GCBD fabrication, field installation and performance, and the development of the capability to incorporate the GCBD in subsequent designs. The transport layer is the key element of the GCBD, and a material referred to as TGLASS was selected as the best available transport layer material. This material was used in the MnROAD field test. There has been discussion with a geosynthetic manufacturer regarding the production of a lower cost transport layer. A method to connect the GCBD to the edgedrain pipe system was developed in the laboratory and used in the MnROAD demonstration. Details and specifications regarding the field installation of the GCBD system were developed and implemented at MnROAD. The laboratory testing, field measurements and design calculations conducted during this project indicate that the GCBD provides specific benefits, including: reduced equilibrium water content in base course; prevention of positive pressures in base course; reduced wetting of underlying subgrade due to infiltration; and prevention of capillary rise of water from subgrade into base.
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