均质未贯穿竖井地基粘弹性固结分析

针对均质深厚软土地基竖井未打穿情况,采用Merchant流变模型,将现有未贯穿竖井地基线弹性固结理论进行了推广,推导了竖井未打穿均质地基的粘弹性固结解析解。该解考虑了涂抹和井阻作用以及竖井打设区和下卧层的相互影响。将解答编制成应用程序,用该程序分析了一竖井未打穿均质地基。分析表明,土体粘滞性对前期固结几乎没有影响,但后期固结度明显降低。土体粘滞性对下卧层的影响程度大于对竖井打设区的影响程度。

VISCOELASTIC CONSOLIDATION ANALYSIS OF HOMOGENEOUS GROUND WITH PARTIALLY PENETRATED VERTICAL DRAINS

Soft soil layer is sometimes too deep to be penetrated by vertical drains in engineering practice. Merchant rheological model is adopted;and the viscoelastic analytical solutions are derived for the consolidation of homogeneous ground with partially penetrated vertical drains based on the existing consolidation theory of ground with partially penetrated vertical drains. Interaction relation between the section with vertical drains and the section without has been taken into account in the solution. In addition,the effects of both well resistance and smear action also have been considered. The solutions have been coded into a program and it is used to analyze a case of homogeneous ground with partially penetrated vertical drains. The results show that viscosity has little effect on the forepart consolidation rate. However,it slows the average consolidation degree in the later period. Soil viscosity has greater effects on the substratum than those on the section with vertical drains.