Slope toe excavation strongly influences the stress balance of natural slopes and redistributes the stress of the slope body. Consequently, the sliding failure of toe-cut slopes is increasingly becoming more frequent,...Slope toe excavation strongly influences the stress balance of natural slopes and redistributes the stress of the slope body. Consequently, the sliding failure of toe-cut slopes is increasingly becoming more frequent, particularly in regions with persistent rainfall. The effects of external factors, namely, toe excavation and persistent rainfall, which lead to toe-cut slope failure were investigated through the numerical analysis of typical toe-cut slopes in the southeastern coastal region of China. Based on the grey relational theory, sensitivity analysis was carried out on the controlling factors to determine the degree of influence exerted by the external factors on the stability of toe-cut slopes. The stability analysis of toe-cut slopes reinforced by pileanchor structures under earthquake conditions was carried out using pseudo-static analysis. The safety factor of toe-cut slopes significantly decreases as the excavation height, rainfall duration, and rainfall intensity increase. The slope stability is more sensitive to the excavation height of a toe-cut slope than it is to rainfall. The stability of a toe-cut slope reinforced by a pile-anchor structure was also analyzed under rainfall and earthquake conditions using the limit equilibrium method and pseudo-static analysis, respectively. The slope stability significantly improved when the slope was reinforced by a pile-anchor structure, even when the slope was subjected to persistent rainfall and earthquakes. The findings of this study can provide important guidance for the prevention of geological disasters in mountainous areas.展开更多
Based on physical model tests, the rubble mound toe structure stability under the action of both regular and irregular waves is studied. Test results show that wave height and water depth at the toe structure are the ...Based on physical model tests, the rubble mound toe structure stability under the action of both regular and irregular waves is studied. Test results show that wave height and water depth at the toe structure are the most important factors affecting the stability of toe berm stone, and that irregular waves cause greater damage to the toe structure than regular waves. Analyses prove that the Gerding formula agrees better with our test results than the Meer formula. Tests on two different types of main armors also indicate that the shape and composition of the main armor have effect on the stability of the toe structure.展开更多
基金The authors sincerely appreciate the financial support provided to this study by the National Key R&D Program of China(No.2017YFC1501304)。
文摘Slope toe excavation strongly influences the stress balance of natural slopes and redistributes the stress of the slope body. Consequently, the sliding failure of toe-cut slopes is increasingly becoming more frequent, particularly in regions with persistent rainfall. The effects of external factors, namely, toe excavation and persistent rainfall, which lead to toe-cut slope failure were investigated through the numerical analysis of typical toe-cut slopes in the southeastern coastal region of China. Based on the grey relational theory, sensitivity analysis was carried out on the controlling factors to determine the degree of influence exerted by the external factors on the stability of toe-cut slopes. The stability analysis of toe-cut slopes reinforced by pileanchor structures under earthquake conditions was carried out using pseudo-static analysis. The safety factor of toe-cut slopes significantly decreases as the excavation height, rainfall duration, and rainfall intensity increase. The slope stability is more sensitive to the excavation height of a toe-cut slope than it is to rainfall. The stability of a toe-cut slope reinforced by a pile-anchor structure was also analyzed under rainfall and earthquake conditions using the limit equilibrium method and pseudo-static analysis, respectively. The slope stability significantly improved when the slope was reinforced by a pile-anchor structure, even when the slope was subjected to persistent rainfall and earthquakes. The findings of this study can provide important guidance for the prevention of geological disasters in mountainous areas.
文摘Based on physical model tests, the rubble mound toe structure stability under the action of both regular and irregular waves is studied. Test results show that wave height and water depth at the toe structure are the most important factors affecting the stability of toe berm stone, and that irregular waves cause greater damage to the toe structure than regular waves. Analyses prove that the Gerding formula agrees better with our test results than the Meer formula. Tests on two different types of main armors also indicate that the shape and composition of the main armor have effect on the stability of the toe structure.
