土工基础

›› 2015, Vol. 29 ›› Issue (6): 44-47.

• 工程实录 • 上一篇    下一篇

分级加载圆形单洞剪切应变及极限承载力分析

方浩亮,王 良   

  1. （中国石油工程建设公司岩土工程公司,山东青岛 266071）
  • 收稿日期:2014-09-30 出版日期:2015-12-22 发布日期:2015-12-30
  • 作者简介:方浩亮（1968-），男，硕士研究生，高级工程师，研究方向为岩土工程。

Ultimate Capacity Analysis of a Single Circular Hole and Its Shear Strain Development

FANG Haoliang， WANG Liang   

  1. (Division of Geotechnical Engineering, China Petroleum Engineering and Construction Co., Qingdao 266071)
  • Received:2014-09-30 Online:2015-12-22 Published:2015-12-30

摘要： 根据某大型炼化工程的物探和勘察资料，建立了覆盖型岩溶发育区典型圆形单洞的数值计算模型。采用分级加载模式，模拟不同压力下单洞的渐进式破坏过程，同时考虑了基础、上覆土层、溶洞顶板的相互作用。给出了不同荷载下溶洞剖面的剪切应变增量云图，直观揭示覆盖型岩溶单洞的破坏机理。结合工程实际，得出了理想状态下该单洞的极限承载力。

关键词: 圆形单洞, 剪切应变增量, 极限承载力

Abstract: The numerical analytical model of the ultimate capacity of a single circular hole is established on the geophysical and geotechnical investigation results for a large refinery project. The progressive failure mode is studied by the stepped incremental loadings with the consideration of the interactions of foundation structures, overburden soils and the thickness of the karst rock at the dome. The incremental shear strain plots under the correspondent incremental loadings are also provided and the progressive failure process of the circular hole can be explicitly demonstrated.

Key words: Single Circular Hole, Incremental Shear Strain, Ultimate Capacity