由桩的嵌岩深度取值引发的岩石软硬程度分类思考

Reflection of the rock stiffness classification from the determination of rock-socketed depth of piles

嵌岩桩在我国许多地区得到广泛应用。嵌岩深度与基岩的性质密切相关,但现行规范中对硬质岩石和软质岩石的划分不够明确,有些分类名称容易混淆,使得风化岩中桩的入岩深度的取值不统一。通过对比分析我国现行几本规范,明确了《建筑地基基础设计规范》和《建筑桩基技术规范》中硬岩和软岩的划分标准,有助于合理地确定风化岩地基中桩基的嵌岩深度。

Rock-socketed piles are widely used in our country. Rock-socketed depth is closely related to the property of the bedrock. The classification of hard and soft rock in current specifications is not clear.Some classification terms are apt to get confused which lead to the different determination of the rocksocketed depth of piles in weathered rock. Comparing the current national codes,the classification standard of hard rock and soft rock in the Code for design of building foundation and Technical code for building pile foundations is specified. The research results could be referred for the determination of rocksocketed depth of piles in weathered rock.