岩石地基上钢筋混凝土独立基础抗剪验算探讨

各规范对独立基础抗剪验算规定不尽相同。持力层为岩石的独立基础．根据GB50007—2011对基础进行抗剪验算常导致基础底板厚度很大。，分析了GB50007—2011、DBT15—31—2003、DB22／45—2（）04对独立基础抗剪验算规定的异同点和局限性，提出独立基础抗剪验算应考虑其穹矩小剪力大的受力特征并引入剪切系数。计算表明，地基反力很大时，按引入剪切系数后的独立基础抗剪验算式确定的基础底板厚度比GB50007-2011降低较多，可与DB22／45-2004对照使用，地基反力较大时，独立基础均应进行抗剪验算。

Discussion of shear calculation for the independent foundation on rock

Each norm is not the exact same in terms of independent foundation shear checking requirements. Whenthe foundation bearing stratum is rock, Anti-sheafing strength checking computation of independent foundation according to GB50007-2011 always lead to the thicker foundation plate. Analyze the similarities , the differences and the limitation of the anti-shearing strength checking computation of independent foundation in GB50007-2011. DBJ 15-31-2003 、 DB22/45-2004, put forward a proposal that we should take into account its stress characteristics of small bending moments and large shear force ,simultaneously introduce proper shear coefficient when check anti-sheafing strength of independent foundation. The result shows that if the sub-grade reaction is larger , foundation plate thickness is reduce more when introduce proper shear coefficientin comparison with GB50007-2011, but can contrast DB22/45- 2004. Independent foundation should be made anti-shearing strength checking computation when the sub-grade reaction is larger o