田湾核电工程场地风化囊体工程特性研究

The engineering properties of the weathering cystid on the field of Tianwan Nuclear Power project

针对田湾核电工程场地调查时发现的不良风化囊体,在原有勘探方案基础上通过加密钻孔与取样,结合浅层地震勘探、声波测井、点载荷试验及室内测试等手段,查明了场地风化囊体的分布范围,对其形成原因进行了探讨,并对风化囊体内岩体的完整性和岩石风化等级进行了评价,得到了反映风化囊体工程特性的力学指标及动态参数,分析了风化囊体对核电建设的影响,为核电工程基础设计提供了科学依据。

The feasibility research of the field is the vital task of nuclear power engineering site selection. As for the bad weathered cystid existed in the field of Tianwan Nuclear Power project investigation, the current study, taking the measure of increased drilling and analysis of sample on the basis of the original exploration scheme, and combining the means of shallow layer seismic prospecting, sound wave logging, point load testing and laboratory testing, has found out the distributing range of the weathered cystid, discussed the reason for its formation, and appraised the intactness of rock mass in the weathered cystid and the weathered grade of the rock, thus has obtained the mechanics index and the dynamic parameters which demonstrate the engineering properties of weathered cystid. The study has then analyzed the influence of the weathered cystid toward the construction of nuclear power project, which have provided a scientific basis for the foundation design of nuclear power project.