CAJ | 학술논문

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。
위개진하류해양공정중적대직경연암감암장감암심도계산방법，탐토감암심도여영향삼수지간적관계，가정감암단장측암석항력정선성분포차암석파배부합막이이차포물선판거，근거감암단장신수도장전암체법향정응력화장측암체절향전응력공동작용득도감암단장체수력계산모형，기우장신수력평형급출최소감암심도해석해，병이용실내모형시험이급공정설계결과대계산모형진행험증。결과표명：감암심도수착기암정면처수평력적증대이증대，수착장경적증대이감소，수착장측암석단축포화항압강도적증대이감소；암석단축포화항압강도증대도모일정치시，감암심도정소폭체감추세；상복토층압응력대감암심도영향불대。
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.