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2023 Vol.39, Issue 3 Preview Page
Development of a Sampler that Minimizes Sample Disturbance and Review of its Applicability

인발시 시료이탈을 최소화한 불교란시료 채취 샘플러 개발 및 적용성 검토

Jongkwan Kim1*
,
Jin-Tae Han2
,
Ka-hyun Park3
,
Hyu-Soung Shin4
,
Li Zhuang5
,
Sun Yeom6
,
Ki-Seog Kim7
김 종관1*
,
한 진태2
,
박 가현3
,
신 휴성4
,
장 리5
,
염 선6
,
김 기석7
1Member, Senior Researcher, Korea Institute of Civil Engineering and Building Technology
2Member, Research Fellow, Korea Institute of Civil Engineering and Building Technology
3Member, Senior Researcher, Korea Institute of Civil Engineering and Building Technology
4Member, Senior Research Fellow, Korea Institute of Civil Engineering and Building Technology
5Senior Researcher, Korea Institute of Civil Engineering and Building Technology
6Technician, Korea Institute of Civil Engineering and Building Technology
7Member, Representative Director, Heesong Geotek Co. Ltd.
1정회원, 한국건설기술연구원 수석연구원
2정회원, 한국건설기술연구원 연구위원
3정회원, 한국건설기술연구원 수석연구원
4정회원, 한국건설기술연구원 선임연구위원
5비회원, 한국건설기술연구원 수석연구원
6비회원, 한국건설기술연구원 선임지원직
7정회원, ㈜희송지오텍 대표이사
*Corresponding Author
31 March 2023. pp. 17-27
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Abstract

In order to accurately determine soil characteristics, it is necessary to collect undisturbed samples, and it is important to collect these samples with minimal disturbance. In this study, a sampler that minimizes sample disturbance was developed by attaching a catcher to the tip, and its applicability was reviewed through in situ sampling, X-ray CT, and laboratory tests. Results confirmed that horizontal cracks are likely to occur when using the Shelby tube sampler, whereas these cracks can be suppressed when using the newly developed sampler. Moreover, consolidation and shear test results showed that the samples collected using the newly developed sampler showed higher maximum shear strength compared to those collected using the Shelby tube sampler.

Keywords
Catcher
In situ sampling
Sampler
Tube sampler
Undisturbed

지반의 특성을 정확하게 파악하기 위해서는 불교란시료 채취가 필수적이며, 이때 최대한 시료를 교란하지 않고 채취하는 것이 중요하다. 본 연구에서는 선단부에 시료 이탈을 방지하는 캐쳐를 장착하여 시료이탈을 최소화하는 샘플러를 개발하였고 이를 대상으로 현장시료채취, CT촬영, 실내시험을 통해 그 적용성을 검토하였다. 동일한 위치에서 쉘비튜브샘플러와 새롭게 개발한 샘플러로 채취한 시료의 CT촬영결과 쉘비튜브샘플러의 경우 수평방향 균열이 발생할 가능성이 높은데 반해 새롭게 개발한 샘플러의 경우 수평방향 균열의 발생을 억제할 수 있는 것으로 나타났다. 또한, 압밀시험과 전단시험 결과 새롭게 개발한 샘플러로 채취한 시료가 쉘비튜브샘플러로 채취한 시료에 비해서 최대전단강도가 높은 것으로 나타났다.

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Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 39
  • No :3
  • Pages :17-27
  • Received Date : 2023-02-20
  • Revised Date : 2023-03-02
  • Accepted Date : 2023-03-03
  • DOI :https://doi.org/10.7843/kgs.2023.39.3.17
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