Abstract

One of the important issues for suction caissons is to demonstrate the effect of the contact between the base and the soil on the ultimate capacities of vertical (V), lateral (H), and moment (M) loads. It has not yet been analytically revealed how the ultimate capacities of suction caissons are dependent on the contact conditions of tension and no-tension interfaces under combined loads including vertical compressive and tensile loads. In this article, an analytical investigation into the effect of interfaces on the ultimate vertical, lateral, and moment capacities of suction caissons in nonhomogeneous clay is made using a traditional bearing capacity theory with tension and no-tension interfaces. For failure envelopes of suction caissons in clay subjected to lateral and moment loads under vertical compressive and tensile loads, the results predicted by the present method are compared with those obtained from the finite element analysis. In order to compare failure envelopes obtained from a tension interface and those obtained from a no-tension interface under general loading, failure envelopes in the H-V, M-V, and H-M planes and in H-M-V space for suction caissons in clay are investigated.

摘要

吸力沉箱的重要问题之一是论证底座与土壤之间的接触对垂直（ V）、横向（H）和力矩（M）极限承载力的影响。）负载。目前尚未通过分析揭示吸力沉箱的极限能力如何取决于在包括垂直压缩和拉伸载荷在内的组合载荷下受拉和无拉界面的接触条件。在本文中，利用传统的受拉和无拉界面承载力理论，对非均质粘土中的吸力沉箱的极限竖向、横向和弯矩能力的影响进行了分析研究。对于竖向压缩和拉伸荷载作用下的粘土吸力沉箱在横向和力矩荷载作用下的破坏包络线，将本方法预测的结果与有限元分析的结果进行了比较。研究了粘土中吸力沉箱的HV、MV和HM平面以及HMV空间。