基于组合块体集的浅埋条形锚板上限分析

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Abstract Based on the bound theorems of limit analysis，admissible velocity field of horizontal strip anchor is constructed by using a combination of several rotational block sets. An application to upper bound analysis of vertically loaded strip anchors on horizontal ground surface is given first to illustrate the utility and effectiveness of the proposed method，and include detailed comparisons with results obtained from other approaches. Then the pull-out capacities of strip anchors in undrained clay with sloping ground surface are analyzed. Pull-out capacity and failure surface characteristics under different embedment ratios，undrained strength，inclined angles of slopes and weight of soil are studied. The results show that the superposition of gravity is not applicable to the case of sloping ground surface. The variation of slope angle has a significant impact on failure surface. The block set mechanism is based on a very simple concept which is integration and combination and can be a reference for the practical design.

Key words： slope engineering limit analysis block set anchor pull-out capacity

Received: 09 December 2010

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https://rockmech.whrsm.ac.cn/EN/Y2011/V30/I5/1049

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