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首页> 外文期刊>Geotechnique >Design method for the undrained capacity of skirted circular foundations under combined loading: effect of deformable soil plug
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Design method for the undrained capacity of skirted circular foundations under combined loading: effect of deformable soil plug

机译：组合荷载下裙式圆形地基不排水能力的设计方法：变形土塞的作用

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摘要

The response of skirted circular foundations with rough and smooth soil-skirt interface to combined loading is investigated. The shape and size of the failure envelopes of the skirted circular foundations under a practical range of embedment ratio, soil strength heterogeneity, soil-skirt interface and level of vertical mobilisation are compared to those of solid embedded circular foundations and skirted strip foundations. The results show that both the foundation geometry and soil plug inside the skirt compartment significantly influence the uniaxial capacity and the shape and size of the failure envelopes. Approximating expressions for solid embedded foundations do not capture the shifting eccentricity of the failure envelopes of the skirted circular foundations. A new approximating solution for describing the failure envelope as a function of embedment ratio, soil strength heterogeneity and soil-skirt interface is proposed. Scaling factors accounting for the decreasing uniaxial capacity of skirted foundations with smooth soil-skirt interface are also defined.
机译：研究了具有粗糙和光滑的土壤-裙边界面的裙形圆形地基对组合荷载的响应。与实心埋入式圆形基础和裙状带状基础相比，将裙状圆形地基的破坏包络的形状和大小在实际覆盖率，土壤强度异质性，土-裙界面和垂直动员水平的实际范围内进行了比较。结果表明，裙部隔室内的基础几何形状和土塞都显着影响单轴承载力以及破坏包络的形状和尺寸。实心嵌入式地基的近似表达式无法捕获带裙边圆形地基的破坏包络线的偏心距。提出了一种新的近似解，用于描述破坏包络随埋深比，土强度非均质性和土裙缘界面的函数。还定义了比例因子，这些比例因子说明了具有光滑土壤-裙边接触面的裙式地基单轴承载力的下降。

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