Geomechanics and Engineering

  • 제17권5호
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  • Pages.497-505
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  • 2019
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Mechanical behaviour of biocemented sand under triaxial consolidated undrained or constant shear drained conditions

  • Hang, Lei (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University) ;
  • Gao, Yufeng (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University) ;
  • He, Jia (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University) ;
  • Chu, Jian (School of Civil and Environmental Engineering, Nanyang Technological University)
  • 투고 : 2018.10.17
  • 심사 : 2019.02.18
  • 발행 : 2019.04.10
⟨ 이전 논문 다음 논문 ⟩

초록

Biocementation based on the microbially induced calcite precipitation (MICP) process is a novel soil improvement method. Biocement can improve significantly the properties of soils by binding soil particles to increase the shear strength or filling in the pores to reduce the permeability of soil. In this paper, results of triaxial consolidated undrained (CU) tests and constant shear drained (CSD) tests on biocemented Ottawa sand are presented. In the CU tests, the biocemented sand had more dilative behaviour by showing a higher stress-strain curves and faster pore pressure reducing trends as compared with their untreated counterparts. In the CSD tests, the stress ratio q/p' at which biocemented sand became unstable was higher than that for untreated sands, implying that the biocementation will improve the stability of sand to water infiltration or liquefaction.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Central Universities, Nanyang Technological University

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