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箱筒型基础防波堤是一种适用于软土地基和深水波浪条件的新型港口与海岸工程结构,依靠沉入地基中的筒型基础维持结构稳定。根据箱筒型基础防波堤极限状态下的结构运动模式,考虑箱筒型基础防波堤的三维空间几何特性、受力特点、极限状态转动点的位置等因素,建立了箱筒型基础防波堤稳定性计算的极限平衡法,通过与有限元结果对比,相互验证了正确性,与有限元法相比,极限平衡法计算速度快,效率高,更方便工程应用。结合天津港防波堤延伸工程,对箱筒型基础防波堤的稳定性进行了分析。结果表明,基础筒高8～10 m时,天津港延伸工程中的箱筒型基础防波堤的抗滑、抗倾和竖向承载力均具有较高的安全度。
The box-type foundation breakwater is a new type of harbor and coastal engineering structure suitable for soft ground and deep-sea wave conditions that maintains structural stability by virtue of a tubular foundation that sinks into the foundation. According to the structure movement mode under the limit state of box-type foundation breakwater, considering the geometric characteristics of three-dimensional space of the box-type foundation breakwater, the characteristics of the force and the location of the rotation point of the limit state, the stability calculation of the box-type foundation breakwater is established Compared with the finite element method, the limit equilibrium method verifies each other correctly. Compared with the finite element method, the limit equilibrium method has the advantages of fast calculation, high efficiency and more convenient engineering application. Combined with the Tianjin Port Breakwater Extension Project, the stability of box-type breakwater is analyzed. The results show that when the basic tube height is 8 ~ 10 m, the anti-skid, anti-tilting and vertical bearing capacity of the box-tube foundation breakwaters in the Tianjin Port Extension project have high safety.