饱和黏土中固定锚腚拖曳锚嵌入轨迹预测模型  

Predicting model of trajectory of fixed fluke dragging embedment plate anchor in saturated clay

作　　者：张春会[1] 王兰 田英辉[2] 于永江[3] 王来贵[3] ZHANG Chun-hui;WANG Lan;TIAN Ying-hui;YU Yong-jiang;WANG Lai-gui(School of Civil Engineering, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China;School of Civil Engineering, Tianjin University, Tianjin 300072, China;School of Mechanics and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, China)

机构地区：[1]河北科技大学建筑工程学院,河北石家庄050018 [2]天津大学建筑工程学院,天津300072 [3]辽宁工程技术大学力学与工程学院,辽宁阜新123000

出　　处：《岩土力学》2018年第6期1941-1947,共7页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.51574139;No.51474121);河北省自然基金项目(No.E2015208089;No.15275409D);山东省自然基金项目(No.ZR2016GM06);河北省交通厅项目(No.Y-2014025)~~

摘　　要：饱和黏土中固定锚腚拖曳锚的嵌入轨迹和承载力预测是深水系泊系统设计的关键。从固定锚腚拖曳锚在饱和黏土海床嵌土的初始状态出发,将固定锚腚拖曳锚和周围土体视作宏单元,假设在锚链拉力作用下宏单元沿土体屈服面法向运动,利用锚链方程计算锚眼拉力,基于增量迭代法建立了预测固定锚腚拖曳锚嵌入运动轨迹和锚眼拉力的模型,编制了相应的计算程序。利用程序预测了Bruce Dennla MK4固定锚腚拖曳锚、Murff算例拖曳锚在饱和黏土中的运动轨迹和承载力,结果表明:本文所建立的模型预测结果正确,可以用于预测固定锚腚拖曳锚嵌入饱和黏土全过程中板锚的运动轨迹、运动形态和锚眼拉力;固定锚腚拖曳锚嵌入过程中,锚运动形态有一个调整过程,因此,旋转角先减小,而后增加,并逐渐趋于稳定值。How to predict the travel trajectory and the bearing capacity of fixed fluke drag embedded anchor in saturated clay is a key issue to design the mooring system in deep water. From the initial state of fixed fluke drag embedded anchor embedded into the saturated seabed, the fixed fluke drag embedded anchor and the surrounding soil is regarded as a macro-element. Assuming the normal motion of the macro element along the soil yield surface under the anchor chain tension, the padeye tension is calculated by the anchor chain equation. Based on an incremental iterative method, the predicting model of fixed fluke drag embedded anchor embedded trajectory and padeye tension is presented. Then, a corresponding calculation program is developed to predict the travel trajectory and bearing capacity of Bruce Dennla MK4 fixed fluke drag embedded anchor and the drag anchors of Murff examples in saturated clay. The results indicate that the developed model and program can be well used to predict the travel trajectory, motion form and padeye tension during the whole process of embedding into the saturated soil of the fixed fluke drag anchor. Since the anchor movement pattern has an adjustment process during the travel of the fixed fluke drag embedded anchor, the rotation angle decreases firstly, then increases, and gradually tends to a stable value.

关 键 词：固定锚腚拖曳锚 嵌入轨迹 预测模型 宏单元 饱和黏土 

分 类 号：TU442[建筑科学—岩土工程]