00822728

Component

https://doi.org/10.3141/1772-15

http://scholar.google.com...enry&publication_year=2001

A geocomposite capillary barrier drain (GCBD) removes water from soil while pore pressures remain negative, that is, the soil to be drained does not need to be saturated. GCBDs are being evaluated for inclusion in pavement systems, particularly between the base course and subgrade layer. The GCBD system comprises a capillary barrier layer (a geonet) sandwiched between transport layers (certain geotextiles). Improved GCBD performance is expected with a transport layer that has a greater affinity for water compared with conventional geotextiles. After many materials were evaluated, a woven fiberglass product was selected for further evaluation as a transport layer. A GCBD with a fiberglass transport layer was placed between a subgrade and a base course in a 3-m-long sloped test device used to measure lateral drainage. Water was infiltrated on the top of the base course, and drainage from the GCBD and the soil layers was collected. Measurements of soil suction were made within the soil layers. The GCBD performance was evaluated during three test phases: constant rate infiltration, subsequent drainage with no infiltration, and transient infiltration corresponding to a design storm. The GCBD was successful in draining sufficient water under suction to prevent positive pore water pressures from developing in the base course and to limit water movement into the underlying subgrade soil.

This paper appears in Transportation Research Record No. 1772, Soil Mechanics 2001.

English

p. 131-136

2001

Transportation Research Record

0309072360

Figures (6) ; References (7)

Base course (Pavements); Composite materials; Fiberglass; Geotextiles; Performance tests; Pore water pressures; Soil suction; Subgrade (Pavements); Subsurface drainage; Woven materials

Geocomposite capillary barrier drains

Design; Geotechnology; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I33: Other Materials used in Pavement Layers; I42: Soil Mechanics

TRIS, TRB, ATRI

Jan 25 2002 12:00AM

• CLASS-A PREDICTION OF CONSTRUCTION DEFECTS IN DRILLED SHAFTS
• EFFECTS OF MINOR ANOMALIES ON AXIAL CAPACITY OF DRILLED SHAFTS
• ENGINEERING ANALYSIS OF DYNAMIC BEHAVIOR OF MICROPILE SYSTEMS
• ESTIMATING HIGHWAY EARTHWORK CROSS SECTIONS BY USING VECTOR AND PARAMETRIC REPRESENTATION
• EXAMINING THE EFFECTS OF REINFORCEMENT IN U.S. FOREST SERVICE DEEP-PATCH LANDSLIDE REPAIR TECHNIQUE: FULL-SCALE MODEL TESTS
• FAILURE OF GEOTEXTILE-REINFORCED VERTICAL SOIL WALLS WITH MARGINAL BACKFILL
• FIELD INSTALLATION OF AN EARTH PRESSURE CELL
• IN SITU MEASUREMENT AND EMPIRICAL MODELING OF BASE INFILTRATION IN HIGHWAY PAVEMENT SYSTEMS
• INSTALLATION SURVIVABILITY OF FLEXIBLE GEOGRIDS IN VARIOUS PAVEMENT SUBGRADE MATERIALS
• INSTRUMENTATION AND CONSTRUCTION PERFORMANCE MONITORING FOR I-15 RECONSTRUCTION PROJECT IN SALT LAKE CITY, UTAH
• LATERALLY LOADED DRILLED SHAFTS EMBEDDED IN SOFT ROCK
• LIMIT STATES AND FACTOR OF SAFETY IN DESIGN OF AN ANCHORED SHEET PILE WALL
• LIZZI'S STRUCTURAL SYSTEM RETROFIT WITH RETICULATED INTERNAL REINFORCEMENT METHOD
• MODELING PAVEMENT SUBDRAINAGE SYSTEMS
• MONITORING THE EFFECTS OF A DEEP EXCAVATION ON TWO ADJACENT OFFICE BUILDINGS
• PERFORMANCE OF GEOCOMPOSITE MEMBRANE AS PAVEMENT MOISTURE BARRIER
• QUALITY ASSURANCE PROCEDURE TO ASSESS MAINTENANCE ADEQUACY OF DRAINAGE ASSETS
• RATIONAL BASIS FOR EVALUATION AND DESIGN OF PAVEMENT DRAINAGE LAYERS
• REAL-TIME MONITORING OF SUBSIDENCE ALONG I-70 IN WASHINGTON, PENNSYLVANIA
• REPEATABILITY AND RELIABILITY OF THE TUBE SUCTION TEST
• SEISMIC BEHAVIOR OF MICROPILES USED AS FOUNDATION SUPPORT ELEMENTS: THREE-DIMENSIONAL FINITE ELEMENT ANALYSIS
• STRAIN WEDGE MODEL HYBRID ANALYSIS OF LATERALLY LOADED PILE GROUP
• STUDY OF SCALP-AND-REPLACE EQUATION IN COMPACTION SPECIFICATION FOR SOIL WITH HIGH GRAVEL CONTENT
• USE OF DISCRETE EVENT SIMULATION TO DESIGN GEOCOMPOSITE MEMBRANE INSTALLATIONS