复合荷载作用下重力锚的抗滑稳定计算
Anti-sliding stability calculation of gravity anchor subjected to combined loading

针对海上复合荷载作用下的重力锚，通过室内模型试验探讨了其抗滑稳定机理，并根据其滑动机理，采用条分法对其抗滑稳定进行了分析。提出了作为船舶等浮体结构的临时锚固基础——重力锚的设计计算方法。试验和分析结果表明：重力锚滑动破坏受位移的控制，作为船舶的临时锚固基础，采用现有的设计计算方法得到的结果偏于安全，并且，能够较为准确地反映重力锚的滑动破坏机理，通过改进方法计算得到的重力锚的抗滑力较传统计算方法提高了17%，与模型试验的结果更加接近。
The anti-sliding capacity is an important problem. Therefore, the model tests are used to study the mechanism of anti-sliding stability of gravity anchor under the combined loading in the sea. The results of tests show that, when a gravity anchor is used as a temporary anchorage foundation of a ship, the sliding of a gravity anchor is determined by its displacements. Based on the sliding mechanism, the slice method is proposed to analyze the anti-sliding stability of the gravity anchor. The lateral bearing capacity is calculated and compared to that obtained by the method often used and the results show that it increases about 17% which is more close to the results of model tests.