论文部分内容阅读
CFG桩是水泥粉煤灰碎石桩的简称。它是由水泥、粉煤灰、碎石、石屑和砂加水拌和形成的高粘结强度桩,和桩间土、褥垫层一起形成复合地基。CFG桩在施工中容易出现的问题有斜孔、孔底虚土、堵管、桩缩颈、断桩、水葫芦桩、窜桩、桩头加泥、蜂窝状桩、桩体强度不均匀、短桩等,本文结合实际对CFG桩施工中出现这些问题的危害、成因进行了探讨,并提出了具体预防措施,希望能够更好的指导实践工作。
CFG pile is short for cement flyash gravel pile. It is made of cement, fly ash, gravel, stone and sand mixed with water to form a high bond strength pile, and piles of soil, cushion together to form a composite foundation. CFG pile prone to problems in the construction of slant hole, empty bottom hole, plugging, shrinking pile, broken pile, water hyacinth pile, channeling pile, pile head plus mud, honeycomb pile, uneven pile strength, Short piles, etc. In this paper, the hazards and causes of these problems in the construction of CFG piles are discussed in the light of actual conditions, and concrete preventive measures are put forward, hoping to better guide practical work.