Title page for ETD etd-12282003-162636


Type of Document Dissertation
Author Park, Youngjin
Author's Email Address yopark@vt.edu
URN etd-12282003-162636
Title Investigation of the Ability of Filters to Stop Erosion through Cracks in Dams
Degree PhD
Department Civil Engineering
Advisory Committee
Advisor Name Title
Brandon, Thomas L. Committee Co-Chair
Duncan, James Michael Committee Co-Chair
Filz, George M. Committee Member
Gutierrez, Marte S. Committee Member
Mitchell, James K. Committee Member
Keywords
  • Embankment dams
  • erosion and piping
  • filters
  • cracks in dams
Date of Defense 2003-12-12
Availability unrestricted
Abstract
The ability of a filter to stop erosion through cracks in the core of a embankment dam requires that the filter be graded so that it will restrain movement of particles from the core, and that the filter be truly cohesionless, so that it will not crack even when subjected to the same types of deformations that cause cracks in the core.

To achieve resistance to cracking, most current filter criteria require that the filter should contain no more than 5% of material finer than the #200 sieve, and that this fine material should be non-plastic. This research study was conducted to investigate whether there specifications do, in fact, result in filters that can be relied upon to slump, fill cracks, and prevent interval erosion in embankment dams.

The research study involved filter erosion tests using a 4-inch diameter device and a 12-inch square device, and "sand castle" tests to investigate the tendency for candidate filters to slump when immersed in water. These tests showed that conventional filter criteria  no more than 5% fines, and fines that are non-plastic, are conservative. The research study showed that even filters with 5% of highly plastic fines are able to slump, fill cracks, and prevent erosion.

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  A1_Title.pdf 10.89 Kb 00:00:03 00:00:01 00:00:01 < 00:00:01 < 00:00:01
  A2_abstract.pdf 10.05 Kb 00:00:02 00:00:01 00:00:01 < 00:00:01 < 00:00:01
  A3_Acknowledgement.pdf 87.78 Kb 00:00:24 00:00:12 00:00:10 00:00:05 < 00:00:01
  A4_Toc.pdf 101.42 Kb 00:00:28 00:00:14 00:00:12 00:00:06 < 00:00:01
  B1_Chapter1.pdf 84.38 Kb 00:00:23 00:00:12 00:00:10 00:00:05 < 00:00:01
  B2_Chapter2.pdf 203.22 Kb 00:00:56 00:00:29 00:00:25 00:00:12 00:00:01
  B3_Chapter3.pdf 609.82 Kb 00:02:49 00:01:27 00:01:16 00:00:38 00:00:03
  B4_Chapter4.pdf 146.49 Kb 00:00:40 00:00:20 00:00:18 00:00:09 < 00:00:01
  B5_Chapter5.pdf 1.16 Mb 00:05:21 00:02:45 00:02:24 00:01:12 00:00:06
  B6_Chapter6.pdf 896.88 Kb 00:04:09 00:02:08 00:01:52 00:00:56 00:00:04
  B7_Chapter7.pdf 588.03 Kb 00:02:43 00:01:24 00:01:13 00:00:36 00:00:03
  B8_Chapter8.pdf 59.75 Kb 00:00:16 00:00:08 00:00:07 00:00:03 < 00:00:01
  B9_Reference.pdf 77.75 Kb 00:00:21 00:00:11 00:00:09 00:00:04 < 00:00:01
  C1_AppendixA.pdf 1.54 Mb 00:07:07 00:03:39 00:03:12 00:01:36 00:00:08
  C2_AppendixB.pdf 2.97 Mb 00:13:45 00:07:04 00:06:11 00:03:05 00:00:15
  C3_vita.pdf 54.84 Kb 00:00:15 00:00:07 00:00:06 00:00:03 < 00:00:01

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