K_0固结粘土地基极限承载力及其修正计算

K0固结粘土的不排水剪强度具有应力诱发各向异性的性质，本文将在各向异性土的本构关系基础上得到的不排水剪强度应用到滑移线场理论中，出得了K0固结粘土地基的极限承载力理论解。通过对不同试验情况下的极限承载力系数及其与K0或有效内摩擦角的系统进行分析，得出了一些有益的结果。通过对不排水剪强度的各向异性修正系数进行分析表明，对于K0固结粘土。实践中通常使用的各向同性承载力系数5．14，如不修正是不适宜的。最后通过载荷试验和足尺试验对本文方法与常规方法进行比较，分析了两种方法的差异。

The Ultimate Bearing Capacity of K_0-consolidated Clay Ground and Its Correction Calculation

The undrained shear strength of K0-consolidated clay is provided with the property of stress-induced anisotropy. Theoretical solution for ultimate bearing capacity of K0-consolidated clay ground is acquired herein by using the undrained shear strength, obtained from the anisotropic constitutive relationship, to the slip-line field theory. By analyzing the relationship between ultimate bearing capacity factors under different tests and K0 value or effective angle of internal friction some beneficial results are achieved. The analyses of the anisotropic correctin coeffieient of the undrained shear strength indicate that for K0-consolidated clay the isotropic bearing capacity factor with the value of (5. 14), which is conventionally used in practice, is not proper without correction. Finally, the method mentioned in this paper is compared with the conventional one through loading plate test and full scale test and the differences between the two methods are analyzed.