Abstract
Landslides caused by earthquakes and other natural disasters may cause serious economic and personal losses. Slope protections are usually applied in engineering practice to prevent significant slope slides and damages. Based on the mechanical and ecological requirements on slope protections, this paper put forward a new type of anchor + hinged block ecological slope and carried out shaking table tests on it and other three traditional slope protections for comparing. By shaking table tests, the acceleration amplification factors and Fourier amplitude spectrums of four different slope types are analyzed and compared to verify the suitability of this new slope protection under earthquakes. The results indicated that the natural frequency and the acceleration Fourier amplitude spectrum of the four tested slope protections change according to internal materials. The anchor + hinged block ecological slope has higher natural frequency comparing to traditional slopes, so the resonance cycle from earthquake excitation can effectively be avoided and as a result the anchor + hinged block ecological slope can achieve better seismic performance.
Highlights
Slope protections usually utilize traditional materials such as vegetation and stone and modern reinforced concrete to prevent slope soil erosions and slides, including natural slope protection and artificial slope protection
With many years developing for slope protection types, the main slope protection types in China, of both traditional and newly developed, usually utilized riprap, concrete slab, sizing block stone, and flexible mesh fabric
To prove the reliability and understand the seismic response of this anchor + hinged block ecological slope protection, this study carried out shaking table model test and finite element simulation on four different slope protection models, including the new developed anchor + hinged block ecological slope protection and three more contrastive common slope protection of the natural slope without vegetation, the hinged block slope, and the hinge block slope with ecological protection
Summary
Slope protections usually utilize traditional materials such as vegetation and stone and modern reinforced concrete to prevent slope soil erosions and slides, including natural slope protection and artificial slope protection. By the above methods and as a flexible slope protection, larger soil deformation is allowed and the following advantages are achieved: (1) holes on block reduce self-gravity load of slope protection wall, which improve the strength capacity; (2) the tenon connections will generate higher shear strength and improve slope protection mechanical performance; (3) the flexible slope protection utilizes the glass fiber rod to hinge blocks, and larger displacement and slips are allowed to exist between blocks, so the friction and interactions between blocks can help to consume earthquake vibration energy; (4) the holes on blocks and plants can help to generate better landscape engineering and achieve better ecological performance; and (5) the mortar-saving properties make constructions easier and reduce the weather influence. To prove the reliability and understand the seismic response of this anchor + hinged block ecological slope protection, this study carried out shaking table model test and finite element simulation on four different slope protection models, including the new developed anchor + hinged block ecological slope protection and three more contrastive common slope protection of the natural slope without vegetation, the hinged block slope, and the hinge block slope with ecological protection
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