|Alternative Title||Study on multi-buckling failure of the bedded rock masses on the consequent slopes
|Place of Conferral||兰州
|Other Abstract||this paper obtained complete multi-buckling categories on the basis of field investigation and promulgated research results. Moreover, the mechanism of each failure mode is analyzed tentatively by numericalsimulation.The main achievements are as follow:
(1) According to established research results, formula of calculating critical slope length and critical load of buckling failure are summarized and the major factors inducing buckling failure are concluded. Then, buckling failure mode is presented consisting of single-buckling and multi-buckling, including one-layer collapse, slipping collapse and retaining wall collapse.
(2) Respectively, taking multi-buckling failure at left bank and at No.3 slope and No.1 slope downstream ropower station as the research object, the main mechanism of multi-buckling, obtained by means of field investigation and numerical simulation, are as follow (a) Multi-bucklingin the same layer Rivers incises - buckle river incises again - buckle again. (b) Slipping multi-buckling Hard rock layer at leading edge buckle-slide with large displacement-hard rock layer exposed at trailing edge buckle. (c) Retaining wall multi-buckling Rivers incises-hard rock layer exposed at trailing edge buckle-riverincises again-hard rock layer at leading edge buckle.
(3) The buckling mode varies with the combination of stratum and the way of river incision. For homogeneous rock stratum, multi-buckling in the same layer will take place eventuallyregardless of hard or soft rock as the river incises. For rock stratum overlapped by hard and soft rock, as river incises by the hard stratum leading edge, the slipping displacement of hard stratum is long enough as a result of its critical buckling length is longer and empty face is higher when the buckling failure takes place, which makes the soft rock exposed at trailing edge buckle easily. As a whole, it behaves as slipping multi-buckling. If river incises hard stratum first, both top and bottom of hard stratum will buckle, which acts as retaining wall multi-buckling.|
姜秉秉. 顺层岩质斜坡多级溃屈机制研究[D]. 兰州. 兰州大学,2016.
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