00621791

Component

http://onlinepubs.trb.org...trr/1991/1309/1309-005.pdf

https://scholar.google.co...ixby&publication_year=1991

An extensive two-dimensional finite element seepage analysis was conducted to study the parameters affecting the wetting-induced behavior of compacted fills. The results showed that decreasing the placement water content increases the initial suction pressures, which increases the time required for hydrocompression and the magnitude of hydrocompression. The analysis also showed that the time required for hydrocompression increased almost linearly with fill depth. The surface infiltration was found to migrate unevenly through the fill material, resulting in an uneven dissipation of the suction pressures and thus differential ground movements. Because the suction pressures had to be dissipated before a drain could be functional, the installation of a canyon drain or side drain or both did not reduce the amount of hydrocompression or the time required for hydrocompression. However, the drains did cause the wetting front to migrate through the fill in a more uneven pattern than without a drain. To reduce the amount of infiltration and thus hydrocompression, the site should be carefully graded to promote runoff and drains should be installed beneath the irrigation points to intercept the infiltration. If water is allowed to infiltrate the fill, the pavements and structures should be designed for the differential ground movements estimated from the procedure described herein.

This paper appears in Transportation Research Record No. 1309, Geotechnical Engineering 1991. 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

01407154

p. 25-34

1991

Transportation Research Record

0309051185

Figures (13) ; References (14)

Compacted soils; Drains; Fills; Finite element method; Infiltration; Seepage; Seismicity; Soil suction

Geotechnology; Highways; Hydraulics and Hydrology; I42: Soil Mechanics

TRIS, TRB, ATRI

Apr 30 1992 12:00AM

• APPLICATION OF CONTINUOUS DYNAMIC COMPACTION CONTROL FOR EARTHWORKS IN RAILROAD CONSTRUCTION
• BROADENING THE SPECIFICATION OF GRANULAR FILLS
• CORRELATING RESILIENT MODULI FROM PRESSUREMETER TESTS TO LABORATORY CALIFORNIA BEARING RATIO TESTS
• DECISION SUPPORT SYSTEM FOR EVALUATION AND TREATMENT OF EARTH SLOPE INSTABILITY
• INEXPENSIVE AUTOMATIC CONTROL SYSTEM FOR SOILS TESTING
• INNOVATIONS IN HYDRAULIC-CONDUCTIVITY MEASUREMENTS
• LABORATORY CORRELATION STUDY OF NEAR-SURFACE RESPONSE PARAMETERS
• MEASUREMENT OF SHEAR AND COMPRESSION WAVES DURING TRIAXIAL TESTING
• PROTOTYPE GEOTECHNICAL INFORMATION SYSTEM
• SEISMIC SPECTRA FOR HIGHWAY BRIDGES IN WASHINGTON STATE
• USE OF VOICE-RECOGNITION SYSTEMS FOR ATTERBERG LIMIT TESTS