ESTIMATION OF UNCONFINED COMPRESSIVE STRENGTH OF CEMENT TREATED SOILS BASED ON MULTI-POINT NEEDLE PENETRATION RESISTANCE
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- KOBAYASHI Makiko
- 大成建設株式会社 技術センター 社会基盤技術研究部
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- ISHII Hiroyasu
- 大成建設株式会社 技術センター 技術企画部
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- FUJIWARA Tadafumi
- 大成建設株式会社 技術センター 社会基盤技術研究部
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- KASAMA Kiyonobu
- 九州大学大学院 工学研究院 社会基盤部門
Bibliographic Information
- Other Title
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- 多点針貫入抵抗測定によるセメント改良土の一軸圧縮強度推定
Abstract
<p> Proper quality control and assurance are required for engineering practices which deal with cement treated grounds since the strength quality is affected by the variability of soil properties as well as distribution of cement particle. Conventional quality control and assurance by means of the unconfined compression test is normally to evaluate an average strength of specimens sampled from discrete points in cement treated ground. On the other hand, needle penetration test can confirm the presence or absence of weak zones in specimen and a continuous strength distribution that cannot be measured solely by the unconfined compression tests. Therefore, the purpose of this study is to propose more reliable strength evaluation method taking advantage of needle penetration tests and to offer advanced conversion formula to induce unconfined compressive strength from the needle penetration resistance. Based on multi-point measurements with a desktop-type needle penetration apparatus, we first propose a new conceptual formula to estimate unconfined compressive strength. To verify the proposed concept, we then conduct needle penetration tests on cement-treated soils with different 51 specimens prepared in various strength ranges. Finally, coefficients of the conceptual formula are identified, and applicability and validity of the formula are discussed.</p>
Journal
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- Japanese Journal of JSCE
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Japanese Journal of JSCE 79 (7), n/a-, 2023
Japan Society of Civil Engineers
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Keywords
Details 詳細情報について
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- CRID
- 1390578304519292544
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- ISSN
- 24366021
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- Text Lang
- ja
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- Data Source
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- JaLC
- Crossref
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- Abstract License Flag
- Disallowed