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2018 Vol.34, Issue 6 Preview Page

Research Article

Performance Evaluation of Pile-Filling Material Using High Calcium Ash by Field Loading Test

고칼슘 연소재를 이용한 매입말뚝 주면고정액의 현장 재하시험을 통한 성능평가

Se-Kwan Seo1
,
You-Seong Kim2
,
Yang-Hyun Lim3
,
Dae-Sung Jo4*
서 세관1
,
김 유성2
,
임 양현3
,
조 대성4*
1Zian Company ltd.
2Dept. of Civil Engrg., Chonbuk National Univ.
3Daewoong Company ltd.
4Dept. of Civil Engrg., Chunbuk National Univ.
1지안산업
2전북대학교 토목공학과
3주식회사 대웅
4전북대학교 토목공학과
* 교신저자* Corresponding Author
30 June 2018. pp. 17-24
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Abstract

In this study, static load test and dynamic load test were performed to evaluate pile-filling material (ZA-Soil) of soil-cement injected precast pile method which was developed by using the ash of circulating fluidized boiler as a stimulant for alkali activation reaction of blast furnace slag. As a result of the static load test, the allowable bearing capacity of pile was 1,350 kN, which was the same as the result of using ordinary portland cement. And total settlement was 6.97 mm, and net settlement was 1.48 mm. These are similar to the total settlement, 7.825 mm, and net settlement, 2.005 mm of ordinary portland cement. As a result of the dynamic load test and CAPWAP analysis, the skin friction was 375.0 kN, the end bearing capacity was 3,045.9 kN, and the allowable bearing capacity was 1,368.36 kN. These results are similar to the results of using ordinary portland cement as pile-filling material.

Keywords
High calcium ash
Pile-Filling material
Soil-cement injected precast pile method
Static load test
Dynamic load test

순환 유동층 보일러의 연소재를 고로슬래그의 알칼리 활성화 반응 자극제로 활용하여 개발한 새로운 매입말뚝의 주면고정액(ZA-Soil)을 시멘트밀크 공법의 주면고정액으로 사용한 말뚝에 대하여 정재하시험 및 동재하시험을 실시하여 보통 포틀랜드시멘트(OPC)와 비교하여 성능을 평가하였다. 정재하시험을 수행한 결과 말뚝의 허용하중은 1,350kN로 보통 포틀랜드시멘트를 매입말뚝의 주면고정액으로 사용한 결과와 동일하였고, 전 침하량은 6.97mm, 순 침하량은 1.48mm로 보통 포틀랜트시멘트의 전 침하량 7.825mm, 순 침하량 2.005mm와 유사한 결과를 보이는 것으로 나타났다. 동재하시험 및 CAPWAP분석을 실시한 결과, 새로운 매입말뚝의 주면고정액(ZA-Soil)의 주면 마찰력은 375.0kN, 선단지지력은 3,045.9kN, 허용지지력은 1,368.36kN으로 나타났고, 포틀랜드시멘트를 매입말뚝의 주면고정액으로 사용한 결과와 유사한 결과를 보이는 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 : 34
  • No :6
  • Pages :17-24
  • Received Date : 2017-11-27
  • Revised Date : 2018-06-07
  • Accepted Date : 2018-06-11
  • DOI :https://doi.org/10.7843/kgs.2018.34.6.17
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