关键词: 相似材料, 库水位升降, 模型试验, 破坏模式, 模糊综合评价

Abstract: The similar material is a key to landslide model test. Based on previous studies of similar material, combined with fuzzy comprehensive evaluation method, a similar material for reservoir landslide model test has been developed through various trial of recipe. The similar material can simulate the similarity both physical and mechanical properties and seepage behavior. The similar material is mixed with standard sand, sliding mass soil, bentonite and water solution. A laboratory landslide model test was performed to verify the similarity of the similar material. The variations of the pore-water pressure, seepage, slipping surfaces and development process of cracks were recorded during the fluctuation of reservoir water level. The model test results indicated that weakening process of water and seepage force point to the free face are the main factors for landslides. The failure mode during rapid drawdown of water level was the multiple retrogressive mode. The seepage path is consistent with theoretical calculation during the fluctuation of reservoir water level. It is an ideal similar material for reservoir landslide model which can generate the similar result of landslide deformation and failure process effect of reservoir water level. And its physical and mechanical characteristics and seepage behavior have met the test similar requirements. The experimental results can provide scientific support to large-scale landslide model test study.

Key words: similar material, reservoir water level fluctuation, model test, failure mode, fuzzy comprehensive evaluation