Laboratory measurement of sensitivity of carbonate soils

Nathalie Boukpeti, Barry Lehane

    Research output: Chapter in Book/Conference paperConference paper

    1 Citation (Scopus)

    Abstract

    Design of geotechnical structures such as piles and offshore pipelines requires knowledge of the soil’s sensitivity to account for the effect of remoulding on the soil’s strength. This effect of remoulding is particularly significant for soils exhibiting post-depositional structure, such as carbonate fine-grained soils. This paper investigates laboratory measurement of sensitivity using three different methods: fall cone, hand vane and mini T-bar penetrometer. Tests were conducted on two carbonate soils from offshore Western Australia, with different grain size distributions. Additional T-bar tests were performed on two reconstituted specimens of one of the soils that was consolidated from a slurry, to evaluate the influence of the method of reconstitution on the soil structure and sensitivity. The results for the more fine grained soil show that the fall cone and T-bar measurements of sensitivity are similar, whereas the hand vane yields much lower values, in particular for deeper samples; the sensitivity of reconstituted samples of this soil is approximately half that of the intact soil. The hand vane and fall cone data for the sandier soil investigated show a significant amount of scatter, with the average value of sensitivity being similar. The results are analysed in the light of existing frameworks for clays, investigating how soil sensitivity can be related to liquidity index and soil structure.
    Original languageEnglish
    Title of host publicationGeotechnical and geophysical site characterisation, ISC5
    EditorsBarry M. Lehane, Hugo E. Acosta-Martínez, Richard Kelly
    PublisherAustralian Geomechanics Society
    Pages541-546
    Volume1
    ISBN (Print)978-0-9946261-1-0
    Publication statusPublished - 2016
    Event5th Int. Conf. on Geotechnical and Geophysical Site Characterisation (ISC’5), - Gold Coast, Queensland
    Duration: 5 Sep 20169 Sep 2017

    Conference

    Conference5th Int. Conf. on Geotechnical and Geophysical Site Characterisation (ISC’5),
    Period5/09/169/09/17

    Fingerprint

    carbonate
    soil
    soil structure
    laboratory
    penetrometer
    soil strength
    slurry
    pile
    grain size
    clay

    Cite this

    Boukpeti, N., & Lehane, B. (2016). Laboratory measurement of sensitivity of carbonate soils. In B. M. Lehane, H. E. Acosta-Martínez, & R. Kelly (Eds.), Geotechnical and geophysical site characterisation, ISC5 (Vol. 1, pp. 541-546). [61] Australian Geomechanics Society.
    Boukpeti, Nathalie ; Lehane, Barry. / Laboratory measurement of sensitivity of carbonate soils. Geotechnical and geophysical site characterisation, ISC5. editor / Barry M. Lehane ; Hugo E. Acosta-Martínez ; Richard Kelly. Vol. 1 Australian Geomechanics Society, 2016. pp. 541-546
    @inproceedings{418fa940affd45ccac70b6aec789ff70,
    title = "Laboratory measurement of sensitivity of carbonate soils",
    abstract = "Design of geotechnical structures such as piles and offshore pipelines requires knowledge of the soil’s sensitivity to account for the effect of remoulding on the soil’s strength. This effect of remoulding is particularly significant for soils exhibiting post-depositional structure, such as carbonate fine-grained soils. This paper investigates laboratory measurement of sensitivity using three different methods: fall cone, hand vane and mini T-bar penetrometer. Tests were conducted on two carbonate soils from offshore Western Australia, with different grain size distributions. Additional T-bar tests were performed on two reconstituted specimens of one of the soils that was consolidated from a slurry, to evaluate the influence of the method of reconstitution on the soil structure and sensitivity. The results for the more fine grained soil show that the fall cone and T-bar measurements of sensitivity are similar, whereas the hand vane yields much lower values, in particular for deeper samples; the sensitivity of reconstituted samples of this soil is approximately half that of the intact soil. The hand vane and fall cone data for the sandier soil investigated show a significant amount of scatter, with the average value of sensitivity being similar. The results are analysed in the light of existing frameworks for clays, investigating how soil sensitivity can be related to liquidity index and soil structure.",
    author = "Nathalie Boukpeti and Barry Lehane",
    year = "2016",
    language = "English",
    isbn = "978-0-9946261-1-0",
    volume = "1",
    pages = "541--546",
    editor = "Lehane, {Barry M.} and Acosta-Mart{\'i}nez, {Hugo E.} and Richard Kelly",
    booktitle = "Geotechnical and geophysical site characterisation, ISC5",
    publisher = "Australian Geomechanics Society",

    }

    Boukpeti, N & Lehane, B 2016, Laboratory measurement of sensitivity of carbonate soils. in BM Lehane, HE Acosta-Martínez & R Kelly (eds), Geotechnical and geophysical site characterisation, ISC5. vol. 1, 61, Australian Geomechanics Society, pp. 541-546, 5th Int. Conf. on Geotechnical and Geophysical Site Characterisation (ISC’5), 5/09/16.

    Laboratory measurement of sensitivity of carbonate soils. / Boukpeti, Nathalie; Lehane, Barry.

    Geotechnical and geophysical site characterisation, ISC5. ed. / Barry M. Lehane; Hugo E. Acosta-Martínez; Richard Kelly. Vol. 1 Australian Geomechanics Society, 2016. p. 541-546 61.

    Research output: Chapter in Book/Conference paperConference paper

    TY - GEN

    T1 - Laboratory measurement of sensitivity of carbonate soils

    AU - Boukpeti, Nathalie

    AU - Lehane, Barry

    PY - 2016

    Y1 - 2016

    N2 - Design of geotechnical structures such as piles and offshore pipelines requires knowledge of the soil’s sensitivity to account for the effect of remoulding on the soil’s strength. This effect of remoulding is particularly significant for soils exhibiting post-depositional structure, such as carbonate fine-grained soils. This paper investigates laboratory measurement of sensitivity using three different methods: fall cone, hand vane and mini T-bar penetrometer. Tests were conducted on two carbonate soils from offshore Western Australia, with different grain size distributions. Additional T-bar tests were performed on two reconstituted specimens of one of the soils that was consolidated from a slurry, to evaluate the influence of the method of reconstitution on the soil structure and sensitivity. The results for the more fine grained soil show that the fall cone and T-bar measurements of sensitivity are similar, whereas the hand vane yields much lower values, in particular for deeper samples; the sensitivity of reconstituted samples of this soil is approximately half that of the intact soil. The hand vane and fall cone data for the sandier soil investigated show a significant amount of scatter, with the average value of sensitivity being similar. The results are analysed in the light of existing frameworks for clays, investigating how soil sensitivity can be related to liquidity index and soil structure.

    AB - Design of geotechnical structures such as piles and offshore pipelines requires knowledge of the soil’s sensitivity to account for the effect of remoulding on the soil’s strength. This effect of remoulding is particularly significant for soils exhibiting post-depositional structure, such as carbonate fine-grained soils. This paper investigates laboratory measurement of sensitivity using three different methods: fall cone, hand vane and mini T-bar penetrometer. Tests were conducted on two carbonate soils from offshore Western Australia, with different grain size distributions. Additional T-bar tests were performed on two reconstituted specimens of one of the soils that was consolidated from a slurry, to evaluate the influence of the method of reconstitution on the soil structure and sensitivity. The results for the more fine grained soil show that the fall cone and T-bar measurements of sensitivity are similar, whereas the hand vane yields much lower values, in particular for deeper samples; the sensitivity of reconstituted samples of this soil is approximately half that of the intact soil. The hand vane and fall cone data for the sandier soil investigated show a significant amount of scatter, with the average value of sensitivity being similar. The results are analysed in the light of existing frameworks for clays, investigating how soil sensitivity can be related to liquidity index and soil structure.

    UR - http://australiangeomechanics.org/admin/wp-content/uploads/2017/02/ISC5_Proceedings-Vol1_20170209-ISBN-978-0-9946261-1-0-LowRes.pdf

    UR - https://www.scopus.com/record/display.uri?eid=2-s2.0-85015226523&origin=resultslist&sort=plf-f&src=s&st1=Laboratory+measurement+of+sensitivity+of+carbonate+soils&st2=&sid=BD14A98A4E3FABCC547894B545EA042D.wsnAw8kcdt7IPYLO0V48gA%3a980&sot=b&sdt=b&sl=71&s=TITLE-ABS-KEY%28Laboratory+measurement+of+sensitivity+of+carbonate+soils%29&relpos=0&citeCnt=1&searchTerm=

    M3 - Conference paper

    SN - 978-0-9946261-1-0

    VL - 1

    SP - 541

    EP - 546

    BT - Geotechnical and geophysical site characterisation, ISC5

    A2 - Lehane, Barry M.

    A2 - Acosta-Martínez, Hugo E.

    A2 - Kelly, Richard

    PB - Australian Geomechanics Society

    ER -

    Boukpeti N, Lehane B. Laboratory measurement of sensitivity of carbonate soils. In Lehane BM, Acosta-Martínez HE, Kelly R, editors, Geotechnical and geophysical site characterisation, ISC5. Vol. 1. Australian Geomechanics Society. 2016. p. 541-546. 61