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。
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.
出处
《土工基础》
2015年第6期44-47,92,共5页
Soil Engineering and Foundation
关键词
圆形单洞
剪切应变增量
极限承载力
Single Circular Hole
Incremental Shear Strain
Ultimate Capacity
