中文摘要：

为改进河流海洋工程中的大直径软岩嵌岩桩嵌岩深度计算方法,探讨嵌岩深度与影响参数之间的关系,假定嵌岩段桩侧岩石抗力呈线性分布且岩石破坏符合莫尔二次抛物线判据,根据嵌岩段桩身受到桩前岩体法向正应力和桩侧岩体切向剪应力共同作用得到嵌岩段桩体受力计算模型,基于桩身受力平衡给出最小嵌岩深度解析解,并利用室内模型试验以及工程设计结果对计算模型进行验证.结果表明：嵌岩深度随着基岩顶面处水平力的增大而增大,随着桩径的增大而减小,随着桩侧岩石单轴饱和抗压强度的增大而减小;岩石单轴饱和抗压强度增大到某一定值时,嵌岩深度呈小幅递减趋势;上覆土层压应力对嵌岩深度影响不大.

英文摘要：

In the present paper we improve the method to calculate socketed depth of large diameter soft rock socketed piles in water project, and explore the relationship between the socketed depth and influencing parameters. Assuming that the rock resistance of rock-socketed pile side is linear distributed and the rock failure criteria matches with the two parabolic Mohr criterions, it is possible to derive the rock-socketed pile ' s calculation model on the basis of rock-socketed pile subjected to normal stress and tangential shear stress. Hence, the minimum depth analytical solution can be given by hydrostatic equilibrium. By using a laboratory model test and a practical project to verify the method, results show that:socket length increases with the increase of the horizontal force and continuously decreases with the increase of the pile diameter and rock uniaxial compressive strength. However, when the rock uniaxial compressive strength increases to a certain value, the rock-socketed depth shows a slight decreasing trend. Additionally, the overburden pressure has little effect on the rock-socketed depth.