DEFORMATION AND FAILURE MODES OF DRYSTONE RETAINING WALLS
DEFORMATION AND FAILURE MODES OF DRYSTONE RETAINING WALLS
复制标题
干石挡土墙的变形与破坏模式
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
D. I. Bush
中科院分区：
文献类型：
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作者：
W. Powrie;R. Harkness;X. Zhang;D. I. Bush
本文用离散元分析方法研究了干石挡土墙变形的控制因素。结果表明，未风化的干砌石挡土墙的倾倒破坏可能以脆性方式发生，墙顶挠度不超过回填高度的1%，直到安全系数（基于土体强度）福尔斯1·05以下。可压缩底基层和块体的风化都倾向于将失效时的回填高度降低到极限平衡分析所示的高度以下。与可压缩底基层相比，隆起破坏更可能与风化导致的块体接缝刚度恶化相关，尽管后者会降低导致隆起破坏所需的接缝刚度降低。膨胀比倾倒的脆性小得多，在某些情况下，可以根据膨胀的大小来评估膨胀壁接近破坏的程度。
In this paper, the factors controlling the deformation of drystone retaining walls are investigated by means of discrete element analyses. It is shown that toppling failure of unweathered drystone retaining walls is likely to occur in a brittle manner, with wall crest deflections not exceeding 1% of the backfill height until the factor of safety (based on soil strength) falls below 1·05. A compressible sub-base and weathering of the blocks will both tend to reduce the backfill height at failure to below that indicated by a limit equilibrium analysis. Bulging failure is more likely to be associated with a deterioration in block joint stiffness due to weathering than a compressible sub-base, although the latter will decrease the reduction in joint stiffness needed to cause bulging failure. Bulging is much less brittle than toppling, and the proximity to failure of bulging walls could in some circumstances be assessed on the basis of the size of the bulge.
DOI：
10.1680/geot.2000.50.2.165
发表时间：
2000
期刊：
Géotechnique
影响因子：
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作者：
Harkness R
通讯作者：
Harkness R