斜倾厚层岩质滑坡视向滑动的土工离心模型试验

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Abstract An experimental investigation into mechanism of apparent dip slide from oblique thick bedding slope failure is performed through geotechnical centrifuge modeling test. The model is casted by mixture of gypsum，cement and barite and consists of four sets of joints. Agreements are obtained between field investigation and centrifuge test that weak layer softening and key block failure are the main reasons why Jiweishan landslide occurs. Driving blocks reach equilibrium and then start to creep crushing on key block in front as centrifugal acceleration rises. Finally，rock slope model fails instantaneously when centrifugal acceleration reaches 16.2 g. The key block fails in shear abruptly and slides in apparent dip followed by high-speed slide of driving blocks. The results of this experiment validate and reproduce the driving-blocks-and-key-blocks mode of apparent dip slide from oblique thick bedding rock slope failure proposed by previous studies.

Key words： slope engineering centrifuge key block driving blocks apparent dip slide oblique thick bedding rock slope

Received: 16 December 2011

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http://www.rockmech.org/EN/Y2012/V31/I5/890

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