海域岛礁桥基岩体质量分级因素及量化研究

Study on Rock Mass Classification Factors and Quantization Indexes of Reef Rock Mass as Bridge Foundation

海域岛礁一般表现为孤立山丘、四面临空且频繁受海水涨、落潮影响特征,从海域岛礁岩体的工程地质特点出发,选择岩石力学性质、结构面发育特征、岩体结构类型、岩体风化状况、地下水状况作为分级控制因素,并分别采用岩石单轴饱和抗压强度Rs、岩体完整性系数Kv、岩石质量指标RQD或岩体块度指数RBI、风化程度系数KY及地下水影响修正系数U进行量化,其结果显示上述指标能很好地反映岩体质量分级的差异。

Reef Rock mass generally are isolated islands with all sides face to the sea,and influenced by tidal action frequently.Based on engineering geological characteristics of reef rock mass,we choose rock mechanical properties,characteristics of discontinuities,rock mass structure types,weathering conditions and groundwater conditions as classification control factors,and use uniaxial saturated compressive strength Rs,rock mass integrality coefficient Kv,rock quality designation index(RQD) or Rock Block Index(RBI),weathering degree coefficient KY and groundwater affect coefficient U to quantify the classification factors respectively.The results show the indexes mentioned above can reflect the difference of rock mass classification satisfactorily.