Journal of the Korean Geosynthetics Society (한국지반신소재학회논문집)

Korean Geosynthetics Society (한국지반신소재학회)
권호 표지
DOI QR코드

DOI QR Code

Analysis of the Reinforcement Effect of Aging Reservoir Reinforced by Environmental Soil Stabilizer as Chemical Grouting Material

친환경 지반안정재를 약액주입재로 사용하여 보강한 노후 저수지의 보강효과 분석

  • Kim, Se-Min (Department of Civil Engineering, Jeonbuk National University) ;
  • Seo, Se-Gwan (Zian Company Ltd., 8th Woosuk University Headquarters Building) ;
  • Cho, Dae-sung (Zian Company Ltd., 8th Woosuk University Headquarters Building)
  • Received : 2021.02.02
  • Accepted : 2021.05.06
  • Published : 2021.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

In this study, a study related to laboratory and pilot test were performed to use an environmental soil stabilizer developed to induce a hardening reaction similar to that of Ordinary Portland Cement (OPC) by using industrial by-products of blast furnace slag and the combustion ash of a circulating fluidized bed boiler as the main material. For this, specimens were prepared using liquid A of sodium silicate and silica sol, and liquid B of an environmental soil stabilizer (or OPC), and laboratory tests were performed to analyze the strength and environmental characteristics. And pilot test was performed on the aging reservoir, field permeability test and electrical resistivity survey were performed in the field to analyze the applicability. As a result of the laboratory test, the homo-gel compressive strength of the chemical injection material using the environmental soil stabilizer as liquid B was about 2.88 to 3.23 times greater than that of OPC. In addition, the elution amount of most heavy metals was lower than that of OPC, and the survival rate in the fish, acute toxicity test was 100%. Therefore, when judged based on the results of the laboratory test, it was analyzed to be superior to OPC in terms of strength and environment. In the results of the pilot test in the aging reservoir, when the environmental soil stabilizer was reinforced with liquid B of the chemical injection material, the coefficient of permeability in the aging reservoir decreased to 1/50 level. In addition, as a result of the electrical resistivity survey, it was analyzed that the electrical resistivity inside the aging reservoir increased as time passed, the saturation zone disappeared, and the overall reinforcement.

본 연구에서는 산업부산물인 고로슬래그와 순환유동층 보일러의 연소재를 주재료로 사용하여 시멘트와 유사한 경화반응을 유도하도록 개발된 친환경 지반안정재를 약액주입재로 사용하기 위한 실내시험과 시험시공에 관련된 연구가 진행되었다. 이를 위해 실내시험에서는 규산소다 및 실리카졸을 A액, 친환경 지반안정재(또는 OPC)를 B액으로 사용하여 시편을 제작하고, 실내시험을 실시하여 공학적·환경적 성능을 분석하였다. 그리고 실제 노후저수지에 시험시공을 실시하고, 현장에서의 투수시험, 전기비저항탐사를 실시하여 적용성을 분석하였다. 실내시험 결과, 친환경 지반안정재를 B액으로 사용한 약액주입재의 호모겔 압축강도는 보통 포틀랜드 시멘트와 비교하여 약 2.88~3.23배 큰 값을 나타내었다. 또한 대부분의 중금속 용출량이 보통 포틀랜드 시멘트와 비교하여 적고, 어독성 시험에서의 생존율도 100%로 나타났다. 따라서 실내시험 결과를 토대로 판단할 때 OPC에 비해 강도적, 환경적으로도 우수한 것으로 분석되었다. 노후 저수지에서의 시험시공 결과에서는 친환경 지반안정재를 약액주입재의 B액으로 사용하여 보강한 경우, 저수지 내부에서의 투수계수는 1/50 수준까지 감소하였다. 그리고 전기비저항 탐사결과 노후 저수지 내부의 전기비저항은 시간이 경과함에 따라 증가하여 포화대는 사라졌으며, 전반적으로 보강되는 것으로 분석되었다.

Keywords

Acknowledgement

This work was supported by the Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (Grant 20TBIP-C144472-03).

References

  1. Andew, R. M. (2018), "Global CO2 Emissions from Cement Production", Earth System Science Data, Vol.10, pp.195-217. https://doi.org/10.5194/essd-10-195-2018
  2. Cho, Y. H., Kim, C. K., and Chun B. S. (2011), "A Study on the Characteristics of Alkali Silica Sol Grouting Material", Journal of the Korean Geo-Environmental Society, Vol.12, No.4, pp.17-24.
  3. Chun, B. S. and Yang, H. C. (2006), "The Effect of STPP on Compressive Strength of Sodium Silicate-Cement Grout", Journal of the Korean Geo-Environmental Society, Vol.4, No.4, pp.25-34.
  4. GIR (Greenhouse gas Inventory and Research center of Korea) (2019), National Greenhouse Gas Inventory Report of Korea, Greenhouse Gas Inventory and Research Center of Korea, Seoul, pp.169-170.
  5. Houlsby, A. C. (1990), Construction and Design of Cement Grouting - A Guide to Grouting in Rock Foundations, 1st Edition, John Wiley & Sons, Inc., New York, pp.270-271.
  6. Jang, Y. G., Kim, S. G., and Kang, I. J. (2016), "Application of Non-Alkaline Silica Sol Grouting Method Considering the Eco-Friendliness", Journal of the Korean Geo-Environmental Society, Vol.17, No.9, pp.37-45. https://doi.org/10.14481/jkges.2016.17.9.37
  7. KARICO (Korea Agricultural and Rural Infrastructure Corporation) (2001), Guidelines for Grouting Design and Construction for Dams, KORICO, Ansan, Rep. of Korea.
  8. Kim, H. K., Kim, Y. H., and Chun, B. S. (2010), "Characteristics Strength of Silicasol-cement Grout Material for Ground Reinforcement", Journal of the Korean Geo-Environmental Society, Vol.11, No.9, pp.47-53.
  9. KS F 2405 (2010), "Standard Test Method for Compressive Strength of Concr ete", Korea Standards Association.
  10. KS M 1415 (2017), "Sodium Silicate Liquid", Korea Standards Association.
  11. Lee, B. H., Kim, Y. H., and Chun. B. S. (2010), "Environmental Imapct Review and Improvement of Durability of Silicasol-cement Grout Material", Journal of the Korean Geo-Environmental Society, Vol.11, No.12, pp.13-18.
  12. Lee, J. G., Ryu, Y. C., Kim, Y. H., Choi, W., and Kim, H. J. (2018) "Drone Infrared Thermography Method for Leakage Inspection of Reservoir Embankment", Journal of the Korean Society of Agricultural Engineers, Vol.60, No.6, pp.21-31. https://doi.org/10.5389/KSAE.2018.60.6.021
  13. Lee, J. H., Kim, Y. R., Kim, G. Y., Yoon, S. J., and Moon, K. J. (2016), "Properties of Liquid Chemical Grouting Material for Soil Grouting using Non-cement Binder", Journal of the Korea Institute of Building Construction, Vol.16, No.1, pp. 45-52. https://doi.org/10.5345/JKIBC.2016.16.1.045
  14. MOE (Ministry Of Environment) (2017), Soil Environment Conservation Act. No. 2017-22:Standard Test Method for Soil Contamination, National Institute of Environmental Research, Incheon.
  15. MOLIT (Ministry of Land, Infrastructure and Transport) (2016), Standard Specification for Temporary Work, E.N.G. Book, Seoul, Rep. of Korea.
  16. OECD (2019), Test No. 203:Fish, Acute Toxicity Test, OECD Guidelines for the Testing of Chemicals, Section 2, OECD Publishing, Paris, France.
  17. Rural Research Institute (2003), Development of Long-Term Monitoring Technique to Delineate the Leakage of Reservoir Dike, Report, Rural Research Institute, Ansan, Republic of Korea.
  18. Ryu, Y. B. and Lee, M. S. (2018a), "Effect of the Addition of Si and Alkali Metal on the Viscostity and Molecular Behavior of Water Glass", Applied Chemistry for Engineering, Vol.29, No.1, pp.112-116. https://doi.org/10.14478/ace.2017.1121
  19. Ryu, Y. B. and Lee, M. S. (2018b), "Infrared Spectra and Thermal Properties of Sodium Silicate Solutions", Korean Journal of Metals and Meterials, Vol.56, No.1, pp.72-78. https://doi.org/10.3365/KJMM.2018.56.1.72
  20. Seo, S. G., Kim, Y. S., and Cho, D. S. (2020), "A Study on the Field Application of Ground Stabilizer using Circulating Resource for Improvement of Soft Ground in Saemangeum Area", Journal of the Korean Geosynthetics Society, Vol.19, No.1, pp.103-110.