Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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A Empirical Study on Durability and Waterproofing Characteristic of Space Multi-Injection Grouting Method

S.M.I 공법의 내구성 및 차수특성에 관한 실험적 연구

  • Published : 2013.01.01
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Abstract

On this study, engineering properties of SGR method and SMI method, which are typical sodium silicate methods, were compared through the laboratory test and durability, strength, waterproof characteristic and environmental effects were compared and analyzed with period and condition of curing on each case. As a result of durability test, volume change of SGR is approximately 23-times greater than SMI and the effects on environment are appeared safe on all method. In case of waterproof characteristic test, permeability coefficient is decreased about 24% on SMI, whereas on SGR permeability coefficient is showed to increase because rapid volume change make wider void. Strength characteristics of SMI are appeared higher about 11-times in case of homogel and 3.9-times in case of sandgel than SGR. Which is because volume change of SMI, caused by leaching, is smaller than SGR.

본 연구에서는 대표적인 물유리계 공법인 SGR 공법과 SMI 공법을 실내시험으로 공학적 특성을 비교한 것으로, 각 조건별 양생기간과 양생조건에 따라서 내구성, 강도 및 차수특성, 환경 영향성을 비교 분석하였다. 그 결과 내구성의 경우 SGR 공법은 SMI 공법에 비해 최대 23배 정도 체적변형이 발생하였고, 환경에 미치는 영향은 두 시료 모두 안전한 것으로 나타났다. 차수특성의 경우 SMI 공법은 최대 24% 정도 감소하였으나 SGR의 경우 체적변형이 급격하게 발생하여 간극이 커져 투수계수가 커지는 경향을 나타냈으며, 강도특성은 SMI 공법이 SGR 공법 보다 호모겔의 경우 약 11.0배, 샌드겔의 경우 약 3.9배 정도 높게 나타났다. 이러한 주원인은 SMI 공법은 SGR 공법 보다 용출현상으로 인한 체적변형이 적게 나타났기 때문으로 판단된다.

Keywords

References

  1. ASTM (2006), Standard test method for unconfined compressive strength of cohesive soil, D2166, pp. 1-6.
  2. Chun, B. S., Jung D. G. and Ryu D. S. (1996), A study on the characteristics of silicasol as injection material for soil impovement, Korean Geotechnical Society Spring Conference, pp. 30-37 (in Korean).
  3. Chun, B. S. (1997), Development and practice of the inorganic ultra fine cement and silicasol in Korea, Ministry of Construction & Transportation, pp. 152-186 (in Korean).
  4. Kim, Y, H. (2012), A study on the application and grouting effects of akali-silicasol grout material from field test, Journal of Korean Geo-Environmentral Society, Vol. 13, No. 8, pp. 5-13 (in Korean).
  5. Krizek, R. J. and Sharp Kevan (2000), Advance in grouting and ground modification, Geotechnical Special Publication, ASCE, pp. 155-172.
  6. Iler Ralph K. (1979), The chemistry of silica, John Wiley & Sons, Inc., N. Y., pp. 172-311.