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介绍了采用冲击钻与旋转钻机联合成孔方案,辅以注浆加固卵石地层方法在超深厚、大料径、高含量卵碎石地层施工钻孔桩过程中遇到的问题及处理方法。
The problems and treatment methods encountered in the construction of bored piles with ultra-deep, large-diameter and high-content oval-gravel stratum are introduced with the joint drilling program by percussion drilling and rotary drilling rig supplemented by grouting and pebble stratum reinforcement.