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倒T型导管墙桩基防波堤是一种重力式和桩基式混合而成的新型防波堤,具有复杂的承载机制和破坏模式。建立倒T型导管墙桩基防波堤稳定性分析的三维弹塑性有限元模型,分析极限状态下结构的位移场分布,得出其失稳模式为绕底板下且偏离桩基轴线一定距离的某点发生转动失稳。结合有限元法和极限平衡法,建立该新型防波堤的抗滑稳定性、抗倾稳定性计算的简化方法。与有限元计算结果的比较表明,建立的简化计算方法是可靠的。
Inverted T-duct wall Pile-based breakwaters are a new type of breakwater that is a combination of gravity and pile foundation with complex bearing mechanisms and failure modes. A three-dimensional elasto-plastic finite element model of the stability analysis of the inverted T-shaped conduit-wall embankment is established. The displacement field distribution of the structure under extreme conditions is analyzed. The instability mode is obtained at a certain distance below the floor and at a distance from the axis of the pile Rotation instability occurred. Combining the finite element method and the limit equilibrium method, a simplified method for calculating the anti-skid stability and anti-tilting stability of the new breakwater is established. The comparison with the finite element calculation results shows that the simplified calculation method established is reliable.