某核电厂软岩地基弹性模量参数特征试验研究

Experimental Study on Elastic Modulus Parameters of Soft Rock Foundation of a Nuclear Power Plant

某核电厂地基为砂泥岩互层型地基。地基以中等风化砂岩和中等风化粉砂质泥岩为主,局部也夹有强风化,核岛地基的均匀性是该核电厂的主要岩土工程问题。文章根据核岛钻孔弹性模量测试结果,研究了模量与测试深度关系、模量与岩层方向关系,进而确立了模量参数的规律,揭示了核岛地基的均匀性特征,并在实际工程中应用示范。

The foundation of a nuclear power plant is sand-mud interbedded foundation.The foundation is mainly composed of moderately weathered sandstone and moderately weathered silty mudstone with strong weathering in some parts.The uniformity of the nuclear island foundation is the main geotechnical problem of the nuclear power plant.According to the test results of borehole modulus of elasticity,this paper studies the relationship between modulus and test depth,between modulus and rock stratum direction,then establishes the rule of modulus parameters,reveals the uniformity characteristics of nuclear island foundation,and demonstrates its application in practical engineering.