Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Load Transfer Characteristics of Pile Foundation for Lightweight Pavement in Sand Soil using Laboratory Chamber Test

모형챔버시험을 이용한 사질토 지반의 경량포장체용 기초의 하중전달 특성

  • Shin, Kwang-Ho (Dept. of Civil Engineering, Kongju National University) ;
  • Hwang, Cheol-Bi (Dept. of Civil Engineering, Kongju National University) ;
  • Jeon, Sang-Ryeol (Dept. of Civil Engineering, Kongju National University) ;
  • Lee, Kwan-Ho (Dept. of Civil Engineering, Kongju National University)
  • 신광호 (국립공주대학교 건설환경공학부) ;
  • 황철비 (국립공주대학교 건설환경공학부) ;
  • 전상렬 (국립공주대학교 건설환경공학부) ;
  • 이관호 (국립공주대학교 건설환경공학부)
  • Received : 2014.02.19
  • Accepted : 2014.07.10
  • Published : 2014.07.31
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Abstract

In this study, small scaled (1/30) laboratory chamber tests of the pile foundation for a lightweight concrete pavement system were carried out to evaluate the safety of a pile foundation on sandy soil. The testing ground was simulated in the field and a standard pile-loading test was conducted. The test piles were divided into 3 types, Cases A, B and C, which is the location from the center of the slab by applying a vertical load. The interval between the piles was set to 8 cm. As a result of the pile foundation model test, the pavement settled when the vertical load was increased to 12kg from 1.5kg in sandy soil ground, particularly the maximum settlement of 0.04mm. Judging from the model chamber test, Case A showed compressive deformation, whereas Case B represented the compression and tensile forces with increasing vertical load. Case C showed an increase in tensile strain.

본 연구에서는 연약지반에서의 경량콘크리트포장을 적용할 때의 안전성 평가를 위해 실제 포장체 사이즈의 1/30으로 축소한 모형을 이용하여 모래지반에서 실험을 실시하였다. 모형토조를 이용하여 지반을 조성하였고, 표준 말뚝재하시험(완속재하시험방법)을 이용하였다. 수직하중이 적용되는 말뚝기초의 슬래브의 중심에서 가까운 순으로 Case A, Case B, Case C로 구분하였고, 각각의 말뚝의 간격은 8cm로 하였다. 말뚝기초 모형시험결과 사질토지반에서 수직하중을 1.5kg에서 12kg로 증가시킬 때 포장체가 전체적으로 침하하였고, 최대 침하량은 0.4mm로 측정되었다. Case A의 경우 압축력을 받는 것으로 나타났으며, Case B는 수직하중이 증가함에 따라 말뚝에 압축력과 함께 인장력도 같이 받는 것으로 보이며, Case C는 하중단계가 증가할수록 인장변형이 증가하는 경향을 나타내었다.

Keywords

References

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