【摘要】 为了解岩基强度对桩竖向抗拔承载力的影响,对桩的荷载传递特点、桩顶位移、桩岩侧阻以及破坏模式进行了模型试验研究。嵌岩抗拔桩的应力影响范围及破坏面的夹角与岩基强度和岩层完整性有关.桩岩强度比越大,桩岩界面剪应力分布越均匀.当岩基强度远小于桩的强度时,应将位移作为桩的设计控制条件;当岩体强度等于或大于桩身强度时,破坏主要受岩基内不连续面的分布和特性控制,锚固点宜设在桩的中下部。更多还原

【Abstract】 The influence of batholith on the vertical pulling bearing capacity of rocksocketed piles is studied. The test results show that the extension of stress and the angle between fracturesections depend on the strength and integrality of batholith. The higher is the strength ratio of piles to batholith, the more uniform is the shear stress distribution on their interfaces. The displacement is the control index of pile design if the strength of batholith is much less than those of the piles. Failure of a pile depends mainly on the distribution and characteristics of rock discontinuities, and under this condition, the anchorage section should be placed at middle or lower parts of the piles.更多还原