超大截面倾斜隧道式嵌岩桩基础开挖施工工艺研究

Study on excavation construction process of inclined tunnel type rock-embedded pile foundation with super large section

通过对夜郎河双线特大桥超大截面倾斜隧道式嵌岩桩基础施工技术研究,探讨出一套适用于岩层破碎山区超大截面、大倾斜角隧道式嵌岩桩基础施工工艺。该工艺具有设计合理、步骤简单、投入成本低、机械化程度高等特点,能简便、高效、快速地完成超大截面大倾斜隧道式单桩基础施工。

Through research on construction technology of inclined tunnel type rock-embedded pile foundation with super large section for Yelanghe super large bridge,a set of construction processes suitable for tunnel type rock-embedded pile with super large section and large inclination in rock crush mountain area are discussed.The process design is reasonable,the procedure is simple,the input cost is low,the mechanization level is high,and the super large section and large inclination tunnel type single pile foundation construction can be completed conveniently,efficiently and quickly.