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2017 Vol.33, Issue 12 Preview Page
A Study on the Waterproofing Performance of Waterproofing Methods for PHC-W Earth Retaining Wall Based on Pressure Chamber Test

PHC-W 흙막이 공법의 차수방안에 관한 차수성능확인을 위한 모형 압력 수조 실험 연구

Yongkyu Choi1
,
Jeanette Odelia Johannes2
,
Daehee Yun2
,
Chae min Kim3
,
Byeong Han Jeon4*
최 용규1
,
Johannes Jeanette Odelia2
,
윤 대희2
,
김 채민3
,
전 병한4*
1Prof., School of Civil, Environmental & Urban Engrg., Kyungsung Univ.
2Student of Master degree, Depart. of Civil Engrg., Kyungsung Univ.
3Ph. D. Student, Depart. of Civil & Environment Engrg., Kyungsung Univ.
4Researcher, Geotechnical Research Institute, Korean Geotechnical Society
1경성대학교 건설환경도시공학부 교수
2경성대학교 토목공학과 석사과정
3경성대학교 건설환경공학부 박사과정
4한국지반공학회 지반공학연구소 연구원
*교신저자. *Corresponding Author. 
31 December 2017. pp. 115-125
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Abstract

PHC-W earth retaining wall could be constructed continuously. Various retaining wall methods such as C.I.P. etc. method require separate waterproof method. However, the PHC-W retaining wall method prevents leakage of groundwater by inserting a waterproofing material at connection part between 2 PHC piles. In this study, the experimental study on 3 waterproofing method for PHC-W retaining wall was conducted at the model pressure chamber. In the method using textile with 1-liquid type and 2-liquid type urethane, rapid leak occurred at the pressure of 120 kPa and 140 kPa or more. In the method of textile with grouting, rapid leak occurred at the pressure of 120 kPa or more, however, in this method, the rapid leakage happened at the top part and the bottom part reinforced with urethane.

Keywords
The PHC-W retaining wall method
Waterproofing methods
The model pressure chamber
1-liquid type uretnane waterproofing method
2-liquid type uretnane waterproofing method
Grouting type waterproofing method
The rapid leakage

PHC-W 흙막이 벽체 공법은 연속시공이 가능한 공법이다. 기존 흙막이 공법에서는 지하수의 유출을 막기 위해 별도의 차수공법이 필요한데 반하여 PHC-W 흙막이 벽체 공법은 PHC-W 말뚝의 연결부에 차수제품을 삽입하여 지하수의 유출을 막을 수 있는 공법이다. 이 연구에서는 PHC-W 흙막이 공법에 적용할 3가지의 차수 방안을 선정하여 압력수조 실험을 진행하였다. 섬유팩내에 1액형, 2액형 우레탄을 주입하는 방안에서는 120kPa, 140kPa 이상의 압력에서 급격한 누수가 발생되었으며, 섬유팩내에 그라우팅하는 방안에서는 120kPa 이상의 압력에서 급격한 누수가 발생되었으며 이 방안에서는 차수재의 상단부와 하단부를 우레탄으로 보강한 부위에서 누수가 발생하였다.

References
1
Choi J. P. (2014), Study on The Economic Analysis of Retaining PHC-W Method Improved High Strength Pile, Pusan National Univ. Master’s Thesis, pp.26-27.
2
Choi, J. P., Kim, M. J., Jin, H. M., Kim, S. S., and Choi, Y. K. (2016), A study on the economic and applocability analysis of PHC-W retaining wall, KSCE 2016 Convention, pp.59-60.
3
Gudjónsson, Gudjón Ólafur and Höskuldsson, Jón Grétar (2014), Functional Requirements for Permanent Diaphgram Walls, Chalmers University, p.6.
4
Hwang, S. H. (2010), Design of Earth retaining Structures, CIR,  pp.47-53.
5
Kamran, M. N. (2005), Temporary Structures Excavation and Excavation Supports, Tokyo Institue of Technology, p.6.
6
Kim, C. M., Kim, S. S., Jeon, B. H., and Choi, Y. K. (2017), A Study on performance improvement of a PHC-W pile for PHC-W, Journal of the Korea Geotechnical Society, Vol.33, No.2, pp.27-34.
7
Oh, J. H. and Cho, C. H. (2004), Retaining engineering, Goomi bookstore, pp.31-35.
8
Raito Kogyo co., Ltd. (2006), Raito Soil Mixing Wall, p.2.
Information
  • Publisher :The Korean Geotechnical Society
  • Publisher(Ko) :한국지반공학회
  • Journal Title :Journal of the Korean Geotechnical Society
  • Journal Title(Ko) :한국지반공학회 논문집
  • Volume : 33
  • No :12
  • Pages :115-125
  • Received Date : 2017-11-04
  • Revised Date : 2017-11-22
  • Accepted Date : 2017-11-30
  • DOI :https://doi.org/10.7843/kgs.2017.33.12.115
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