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Influence of Soil Joints on Permeability of Glacial Till

Prvanovic, Aleksandar
http://rave.ohiolink.edu/etdc/view?acc_num=kent1428615878

Abstract Details

2015, PHD, Kent State University, College of Arts and Sciences / Department of Earth Sciences.
Joints in soil (some clays, glacial till) can significantly affect the engineering and hydraulic behavior of soil masses similar to the manner in which rock joints affect the behavior of rock masses. To investigate the effect of soil joints on permeability of glacial till, a series of in situ field and laboratory permeability tests were performed on bluffs of late Wisconsinan glacial till located along the Lake Erie shoreline in the northeastern Ohio. The till at the study sites (the Ashtabula Till) classifies as low plasticity silt to low plasticity clay (ML–CL) with clay content of 35.7% to 41.1%. Mineralogically, it consists of quartz, illite, and kaolinite. It is jointed with joint apertures varying from 1 mm to 30 mm. Most joints in the field are partially filled with lacustrine sediment and/or disintegrated till material and some of the joints are hydraulically interconnected. Field and laboratory tests showed that the permeability of jointed till masses are generally time dependent. Dry samples exhibited a trend of declining permeability with the highest decrease of permeability occurring during the first 24 hours. Field tests performed on jointed portions of glacial till mass under non-controlled conditions (variable degrees of joint filling and till water content) and under variable water flow regimes indicate that joint apertures and the degree of filling appear to play a significant role in the overall permeability of glacial till mass. Measured in situ field permeability of the intact till is almost three orders of magnitude higher than that of intact till samples measured in the laboratory. Laboratory tests indicated that under controlled conditions, and when joints are completely filled, variation in apertures did not appear to noticeably influence the overall permeability of the till mass, but that the difference in the initial till water content significantly impacted the pattern of permeability changes as dry samples exhibited a substantially higher drop of permeability than saturated samples. During laboratory tests on dry samples, open joints with no filling material completely collapsed and the permeability of these samples generally corresponded to the permeability of the collapsed till material. Permeability tests on saturated samples with open joints and different joint patterns with no filling material were inconclusive.
Abdul Shakoor (Advisor)
222 p.
Geology
Glacial till; joints; permeability; swelling; laboratory permeability testing; till characterization;

Recommended Citations

Citations

  • Prvanovic, A. (2015). Influence of Soil Joints on Permeability of Glacial Till [Doctoral dissertation, Kent State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=kent1428615878

    APA Style (7th edition)

  • Prvanovic, Aleksandar. Influence of Soil Joints on Permeability of Glacial Till. 2015. Kent State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=kent1428615878.

    MLA Style (8th edition)

  • Prvanovic, Aleksandar. "Influence of Soil Joints on Permeability of Glacial Till." Doctoral dissertation, Kent State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=kent1428615878

    Chicago Manual of Style (17th edition)

kent1428615878
1,151
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This open access ETD is published by Kent State University and OhioLINK.