모형실험을 통한 포화사석층 그라우팅의 차수효과

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그라우팅, 그라우트, 사석층, 차수
In the case of the ground having underground water, the grouting method is normally used. The grout material includes mortar that is combined with one or more among cement suspension, clay, sand, gravels or bentonite, or the chemical fluid of cement. However, these grout materials are hard to permeate, can be swept away because they take long time to harden. For these reasons, it requires another renovation again within 5 or 10 years due to the eluviation of grout materials. Therefore, it is necessary to develop grout materials which are more suitable for the void of ground and having underground water.
Grouting is generally used for the impermeable body of breakwater or reinforcing it, but unavoidably the mixture of boulders or the oddly shaped stones disrupts drilling works. Grouting is not done as effectively as we expect. New grouting methods and materials are being developed and attempted, but the grouting to saturated riprap layer in particular is not effectively done. Especially, when using the grout fluid, the grout materials are hard to fill the void and sometimes the weak durability happens by the eluviation of the grout fluid. Also, when injecting the cement suspension, it could be diluted by the velocity of a moving fluid, and if the velocity is too fast, the filling would not be able to perform well.
In this study, four grout materials were developed to evaluate the effectiveness of grouting to saturated riprap layer with flow of underground water . The developed materials are divided into quick-setting and general-type which are also composed of the high and low viscosity. A number of grouting experiments were performed in a model chamber with 0.4m in diameter and 2.0m in length. To reproduce the field conditions of saturated riprap layer, the grouting experiments were done with 0cm/sec and 10cm/sec of the flow velocity and 10L/min and 20L/min of the injection velocity. Based on the grouting experiments, the quick setting type was found to be most effective for grouting to the saturated riprap layer.
Alternative Title
Effects of Grouting on the Saturated Riprap Layer by Model Test
Alternative Author(s)
Jung Sin Gyu
조선대학교 대학원
일반대학원 토목공학과
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Table Of Contents
목 차


제 1 장 서론 1
1.1 연구배경 및 목적 1
1.2 국내·외 연구 동향 2
1.3 연구방법 5

제 2 장 그라우팅 종류 및 특징 그리고 물의 흐름 7
2.1 그라우트재와 그라우팅공법 7
2.1.1 그라우트재의 분류 7
2.1.2 그라우트재의 종류 8
2.2 그라우팅 설계 14
2.2.1 그라우팅공법의 선정 14
2.2.2 그라우팅 계획 16
2.3 물의 흐름 34
2.3.1 흙속의 물의 흐름 34
2.3.2 사석층의 물의 흐름 38

제 3 장 실내실험 방법 및 결과 43
3.1 현장 상황 및 현장조건 43
3.2 시료 및 시험기 43
3.2.1 시료의 배합비 및 주입조건 46
3.1.2 시험 절차 47
3.3 주입둘레 측정 50
3.3.1 그라우트재 주입 둘레 측정개요 50
3.3.2 주입시간에 따른 둘레 측정결과 53
3.3.3 유속유무에 따른 둘레 측정결과 58
3.3.4 기존 주입재와 개발 주입재 비교결과 61
3.3.5 그라우트재의 팽창률 분석 63
3.4 그라우트재의 강도평가 66
3.4.1 일축압축강도 평가결과 67
3.5 수중불분리 평가 73
3.5.1 수중불분리 평가결과 73
3.6 그라우재의 통수능 평가 74
3.6.1 통수능 평가 결과 75

제 4 장 결 론 77

조선대학교 대학원
정신규. (2013). 모형실험을 통한 포화사석층 그라우팅의 차수효과.
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General Graduate School > 3. Theses(Master)
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