预制型芯柱嵌岩桩设计与施工若干问题探讨

嵌岩桩作为一种比较特殊的桩基础形式，其施工工艺控制要求对嵌岩桩设计至关重要。结合工程实例经验，针对预制型芯柱嵌岩桩设计与施工过程中关于选取预制桩斜率、控制终锤贯入度、规定孔内沉渣厚度要求、确定泥浆指标等问题，通过列举分析工程实例、试算轴向承载力及分析规范计算公式，得出了预制型嵌岩桩设计过程中关键参数的取值注意要点及建议值，此外还给出了施工常见问题及处理措施。

Discussion on problems in design and construction of precast core-column rock-socketed pile

Rock-socketed pile is a special form of pile foundation,and its construction technology control requirements are very important to the design of rock-socketed pile.Combining with the experience of engineering examples,aiming at the problems in the design and construction of precast core-column rock-socketed pile,such as selecting the slope of precast pile,controlling the penetration of final hammer,regulating the thickness requirements of sediment in boreholes and determining the mud index,by enumerating the engineering examples,calculating the axial bearing capacity and analyzing the standard formulas,the key points and recommended values of the key parameters in the design process of precast rock-socketed piles are obtained.In addition,common problems in construction and treatment measures are given.