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2016 Vol.15, Issue 3 Preview Page
Prediction of the Elastic Modulus of Improved Soil Using the Flat TDR System

판형 TDR 시스템을 이용한 개량지반의 탄성계수 예측

Minwoo Song1
,
Wanmin Kimi1
,
Daehyeon Kim2*
,
Chanyong Choi3
송 민호1
,
김 완민1
,
김 대현2*
,
최 찬용3
1Nonmember, Graduate Student, Department of Civil Engineering, Chosun Univ.
2Member, Professor, Department of Civil Engineering, Chosun Univ.
3Member, Senior Researcher, High Speed Railway Research Division, Korea Railroad Research Institute
*교신저자. *Corresponding Author. 
30 September 2016. pp. 77-85
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Abstract

This study was conducted to solve the problem such as damage of completed compaction ground using the conventional compaction control method. In this study, a TDR system equipped with a flat type probe has been developed. Also, the Piezoelectric stack, which is an instrument for measuring the elastic wave on the ground, has been added to the developed flat type probe. In this study, the strength variation of reinforced soil with time was determined by using the TDR system. The value of compression and shear modulus increased from 198.65MPa to 541.80MPa and from 125.55MPa to 302.02MPa with time, respectively. Based on the test results, it has been confirmed that the developed TDR system can be used as reinforced effect analysis of soil and compaction control.

Keywords
Compression modulus
Shear modulus
TDR
Strength variation
Compaction control

본 연구는 기존의 다짐관리 방법에서 다짐이 완료된 지반의 일부를 손상시켜야 하는 단점을 해결하기 위하여 진행되었다. 본 연구를 통하여 판형 Probe를 제작하였고, 제작한 Probe에 탄성파 측정 장치인 Piezoelectric stack을 결합하였다. 개발한 TDR 시스템을 이용하여 시간에 따른 개량토의 강도 변화를 측정하였다. 실험 결과, 압축탄성계수 및 전단탄성계수는 각각 78.92MPa에서 587.09MPa, 31.53MPa에서 182.44MPa로 증가함을 확인할 수 있었다. 실험 결과를 통하여 개발한 TDR 시스템을 이용하여 현장에서 개량지반의 시간경과에 따라 지반개량효과 및 다짐관리에 유용하게 활용할 것으로 기대된다.

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Information
  • Publisher :Korean Geosythetics Society
  • Publisher(Ko) :한국지반신소재학회
  • Journal Title :Journal of the Korean Geosynthetics Society
  • Journal Title(Ko) :한국지반신소재학회 논문집
  • Volume : 15
  • No :3
  • Pages :77-85
  • Received Date : 2016-06-29
  • Revised Date : 2016-08-23
  • Accepted Date : 2016-09-22
  • DOI :https://doi.org/10.12814/jkgss.2016.15.3.077
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