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ISSN : 2233-8292

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논문 투고

Vol.20 No.2

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폐색효과를 고려한 사질토의 시멘트 침투그라우팅 거동 특성

Behavior of cement-based permeation grouting in cohesionless soil considering clogging phenomena

(사)한국터널지하공간학회 / (사)한국터널지하공간학회, (P)2233-8292; (E)2287-4747
2018, v.20 no.2, pp.485-500
https://doi.org/10.9711/KTAJ.2018.20.2.485
서종우 (고려대학교)
이인모 (고려대학교)
김병규 (고려대학교)
권영삼 (고려대학교)
서종우, 이인모, 김병규, & 권영삼. (2018). 폐색효과를 고려한 사질토의 시멘트 침투그라우팅 거동 특성. (사)한국터널지하공간학회, 20(2), 485-500, https://doi.org/10.9711/KTAJ.2018.20.2.485

초록

사질토에서의 시멘트 침투 그라우팅 거동 특성을 실내 챔버 모형실험 결과를 토대로 흙의 입도분포에 따라 시멘트 침투그라우팅 불가 영역, 시멘트 침투 그라우팅 가능 영역, 그리고 급결제 혼합 필요 영역으로 구분하였다. 시멘트 침투 그라우팅 가능 영역에서는 대표 간극 반지름의 개념을 제안하였고 사질토에서의 평균 간극 반지름에 대한 대표 간극 반지름의 비를 실내실험 결과와 폐색 이론식을 비교함으로 구할 수 있었으며, 입도분포에 따라 1.07에서 1.35 정도가 됨을 알수 있었다. 또한 실험 조건 별로 실험결과와 이론식을 비교하여, lumped parameter ()를 흙의 대표 간극 반지름과 시멘트 그라우트재의 물시멘트비로부터 구할 수 있는 관계식을 제안하였다. 급결제 혼합 필요 영역에서는 겔화 시간의 조절을 통한 주입 깊이의 제한과정을 실험적으로 검증하였고 그 실험값이 시간에 따른 점도 변화 함수를 적용한 이론값과 일치하는 것을 확인하였다.

keywords
Cement-based permeation grouting, Clogging, Lumped parameter, Representative pore radius, Viscosity of grout, 시멘트 침투 그라우팅, 흡착 현상, 집중 상수, 대표 간극 반지름, 그라우트의 점도

Abstract

The behavior of cement-based permeation grouting is divided into three different groups depending on the grain size distribution of the soils: (1) zone of cement-based permeation grouting not feasible; (2) zone of cement-based permeation grouting feasible; and (3) zone in which an accelerating agent should be added to limit the penetration depth. In the cement-based permeation grouting feasible zone, the concept of a representative pore radius was proposed. The ratios of the representative pore radius to the mean pore radius were obtained by performing laboratory test and comparing with clogging theory; these values were in the range of 1.07 and 1.35 depending on the grain size distribution of the soils. In addition, a functional relationship between the lumped parameter (), the representative pore radius and the w/c ratio were derived by comparing and matching experimental results with predictions from theory. In the zone in which the accelerating agent should be added, the controlling process of gel time to limit the penetration depth was experimentally verified. The test results matched well with those obtained from theory utilizing the developed grout penetration program on condition that the viscosity increasing tendency of grout suspension with time is properly taken into account.

keywords
Cement-based permeation grouting, Clogging, Lumped parameter, Representative pore radius, Viscosity of grout, 시멘트 침투 그라우팅, 흡착 현상, 집중 상수, 대표 간극 반지름, 그라우트의 점도

참고문헌

1.

Arya, L.M., Dierolf, T.S. (1992), "Predicting soil moisture characteristics from particle-size distributions: an improved method to calculate pore radii from particle radii", Proceedings of the International Workshop on Indirect Methods for Estimating the Hydraulic Properties of Unsaturated Soils, University of California, Riverside, CA, pp. 115-124.

2.

Joo, E.J., Kim, Y.K., Shin, J.H., Kwon, O.Y. (2010), "Numerical study for the optimum grouting design of subsea tunnels", Journal of Korean Tunnelling and Underground Space Association, Vol. 12, No. 5, pp. 349-358.

3.

Kim, J.S., Lee, I.M., Jang, J.H., Choi, H. (2009), "Groutability of cement-based grout with consideration of viscosity and filtration phenomenon", International Journal for Numerical and Analytical Methods in Geomechanics, Vol. 33, No. 16, pp. 1771-1797.

4.

Lee, J.W., Kim, H.M., Yazdani, M., Park, E.S. (2017), "Influence of design parameters of grout injection in rock mass using numerical analysis", Tunnel and Underground Space, Vol. 27, No. 5, pp. 324-332.

5.

Reddi, L.N., Bonala, M.V.S. (1997), "Analytical solution for fine particle accumulation in soil filters", Journal of Geotechnical and Geoenvironmental Engineering, Vol. 123, No. 12, pp. 1143-1152.

6.

Yang, Z.Q., Hou, K.P., Guo, T.T. (2011), "Study on the effects of different water-cement ratios on the flow pattern properties of cement grouts", Applied Mechanics and Materials, Vol. 71, pp. 1264-1267.

7.

You, K.H. (2011), "Analysis on the effect of strength improvement and water barrier by tunnel grouting reinforcement", Journal of Korean Tunnelling and Underground Space Association, Vol. 13, No. 4, pp. 291-304.

8.

You, K.H., Jie, H.K., Seo, K.W., Kim, S.J., You, D.W. (2012), "A study on the correlation between the rock mass permeability before and after grouting & injection volume and the parameters of Q system in a jointed rock mass tunnel", Journal of Korean Tunnelling and Underground Space Association, Vol. 14,No. 6, pp. 617-635.

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