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静止土压力系数K_0作为岩土工程设计的一个基本参数,其测定是土工试验的重要内容。由于土质的差异,无法提供统一的K_0值,各地需通过试验或地区经验来确定。本文结合轨道交通1、2、3号线岩土工程勘察,开展宁波地区浅层土的静止土压力系数K_0研究。以室内三轴试验测定的K_0为参考,结合扁铲侧胀试验数据提出了适用于宁波地区的K_0计算经验公式,并给出了各土层K_0取值范围及建议值,可为宁波地区岩土工程设计提供技术支持。
Static earth pressure coefficient K_0 as a basic parameter of geotechnical engineering, its determination is an important part of geotechnical test. Due to differences in soil quality, it is not possible to provide a uniform K0 value, which must be determined through experiments or regional experience. Based on the geotechnical investigation of rail transit 1, 2 and 3, this paper studies the still earth pressure coefficient K_0 of shallow soil in Ningbo area. Taking K_0 measured by indoor triaxial test as a reference and combined with flat dilatometer test data, an empirical formula of K_0 applicable to Ningbo area is proposed, and the range and recommended value of K_0 for each soil layer are given. Soil Engineering Design to provide technical support.