한국지반공학회논문집 (Journal of the Korean Geotechnical Society)

  • 제28권12호
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  • Pages.111-122
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  • 2012
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  • 1229-2427(pISSN)
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  • 2288-646X(eISSN)
한국지반공학회 (Korean Geotechnical Society)
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연약지반의 복합적 평가를 위한 전기비저항 탄성파 Flat DMT 장비 적용

Application of Resistivity Seismic Flat Dilatometer (RSDMT) System for Multiple Evaluation of the Soft Soil Site

  • 방은석 (한국지질자원연구원 광물자원연구본부) ;
  • 김영상 (전남대학교 해양토목공학과) ;
  • 박삼규 (한국지질자원연구원 광물자원연구본부) ;
  • 김동수 (한국과학기술원 건설 및 환경공학과)
  • 투고 : 2012.11.05
  • 심사 : 2012.12.07
  • 발행 : 2012.12.31
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초록

딜라토메터 시험과 동시에 탄성파 속도와 전기비저항 값을 도출할 수 있는 전기비저항 탄성파 Flat DMT 장비를 소개하였다. 탄성파 속도 측정 부분의 신뢰성을 높이기 위해서 자동 가진원, PC기반 신호 획득 장비 및 운영 프로그램의 개발을 통해 자동화 시스템을 구축하였다. 실제 전기비저항 측정을 위해서 전기비저항 측정 모듈의 거리계수를 실험적으로 도출하였다. 개발된 장비의 현장 검증 실험을 연약 지반 개량 공사가 진행될 부지에서 수행하였으며 비교를 위해 SPT, 피에조 콘, 벤더 엘리먼트 실험 및 지표면 전기비저항 탐사 등을 동시에 수행하였다. 개발된 장비를 통해서 한 번의 관입 실험으로 다양한 지반 정수의 도출이 가능하였으며 모든 측정 모듈에서 반복성 및 신뢰성을 확인함으로써 개발된 장비를 검증하고 적용성을 평가할 수 있었다.

Resistivity seismic dilatometer (RSDMT) system is introduced. The resistivity module for obtaining resistivity-depth plot and seismic module for obtaining wave velocity-depth plot are attached to the conventional flat dilatometer testing equipment. To enhance the reliability and repeatability of seismic part in RSDMT, automatic testing system including automatic surface source, PC based data acquisition system and operating program was constructed. To obtain real resistivity value of soil, geometric factor for the array of electrodes in RSDMT was derived empirically. The verification studies for the developed RSDMT system were performed with SPT, CPTu, bender element test and DC resistivity survey. Through one penetration of RSDMT, various soil parameters were obtained and the reliability and repeatability of developed RSDMT system could be checked.

키워드

참고문헌

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피인용 문헌

  1. Estimation of undrained shear strength for saturated clay using shear wave velocity vol.35, pp.2, 2017, https://doi.org/10.1080/1064119X.2016.1140855