饱和软粘土中新型法向承载力锚极限承载力分析

法向承力锚(VLA)因其安装回收方便、承载能力高、可重复使用等优点,被广泛应用于海洋工程。文中假设一楔形锚板埋置于理想不排水饱和软粘土中,通过建立锚板-土体有限元数值模型,对锚板的极限承载力和锚的失效形式进行分析,考察了不同埋深、埋置倾角等对其承载力系数的影响。在浅埋和深埋两种情况下,锚的失效形式分别表现为锚板上方土体的整体破坏和周边土体的局部剪切破坏。随着埋深增加,锚板承载力系数趋于稳定,埋置倾角对承载力系数的影响也逐渐变小。

Analysis of ultimate bearing capacity for new-type vertically loaded anchor in saturated soft clay

The Vertically Loaded Anchor (VLA) is widely applied in ocean engineering due to the convenient installation and recycling, high bearing capacity and reusability. It is assumed that a wedge-shaped anchor is buried in the ideal undrained saturated soft clay. A ifnite element modeling of anchor-soil has been established to carry out the analysis of the ultimate bearing capacity and the failure pattern of the anchor, and the investigation of the inlfuence of different embedment depths and angles to the bearing capacity factor. It is found that the failure pattern shows a whole damage of soil above the anchor for the shallow embedding, and a local shear damage of the surrounding soil for the deep embedding, respectively. With the increasing embedment depths, the bearing capacity factor of the anchor tends to be stable, and the inlfuence of embedment angles on the bearing capacity factor becomes smaller and smaller.