냉각 거울 측정법을 이용한 포항지역 붕괴 비탈면침투 및 안정해석

다국어 초록 (Multilingual Abstract)

In this study, numerical analyses based on unsaturated soil mechanics were conducted, primarily utilizing the hydro-mechanical behavior derived from the dual van Genuchten model and chilled mirror measurements. The primary aim was to enhance the precision of the soil water retention curve and hydraulic conductivity curve, leading to improved results in 2D slope infiltration and stability analyses. Soil samples were collected from collapsed slopes in Pohang, caused by a Typhoon. Various hydrological tests were performed using a volumetric pressure plate extractor, transient water release and imbibition method, evaporation method, and chilled mirror measurement. Subsequent to the hydrological tests, nonlinear analyses of infiltration and stability were carried out for collapsed unsaturated soil slopes, incorporating information on hydro-mechanical behavior. The results of the infiltration analysis provided calculations for variations in capillary pressure and saturation due to rainfall. In the stability analysis, the contribution of matric suction to effective stress was computed and integrated into the shear strength of unsaturated soil. The outcomes of the slope stability analysis closely resembled the actual failure observed in the field, validating the reliability of the hydro-mechanical model employed in this study.

목차 (Table of Contents)

• 제 1 장 서 론 1
• 1.1 연구목적 및 배경 1
• 1.2 연구방법 및 내용 3
• 제 2 장 이론적 배경 4
• 2.1 불포화토와 모관흡수력 4
• 2.2 함수특성곡선 6
• 2.3 함수특성시험 11
• 2.3.1 압력판 추출 시험 11
• 2.3.2 부정류 유출 및 흡입 시험 13
• 2.3.3 증발법 시험 15
• 2.3.4 냉각 거울 측정법 17
• 2.4 Dual van Genuchten Model 20
• 2.5 2차원 침투해석 22
• 2.6 2차원 안정해석 23
• 제 3 장 불포화토의 수리-역학적 특성 26
• 3.1 붕괴 비탈면 개요 26
• 3.2 함수특성시험 분석 32
• 제 4 장 붕괴 비탈면의 침투 및 안정해석 37
• 4.1 PH-1 침투 및 안정해석 37
• 4.2 PH-2 침투 및 안정해석 44
• 4.3 PH-3 침투 및 안정해석 51
• 제 5 장 결 론 58
• 참고문헌 60
• Abstract 64