宁波地区浅层土静止土压力系数K_0的确定方法  

Determination of static earth pressure coefficient K_0 in shallow soil in Ningbo area

作　　者：黄勇[1] 刘干斌[1] 陈斌[2] 郑荣跃[1] 顾其波 

机构地区：[1]宁波大学岩土工程研究所,浙江宁波315211 [2]宁波市轨道交通工程建设指挥部,浙江宁波315010

出　　处：《工程勘察》2016年第6期11-17,共7页Geotechnical Investigation & Surveying

基　　金：宁波市科技计划项目(2013C50005);浙江省新苗人才计划项目(2015R405075)

摘　　要：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。The soil static pressure coefficient K_0 as a basic parameter for geotechnical design, the determination is important in soil testing. Due to the difference of the soil,the K_0 value should be determined by experiment or local experience. The shallow soil static earth pressure coefficient K_0 of Ningbo area is studied in the geotechnical investigation works for the Line No. 1,2 3 of Ningbo Urban Rail Transit project. Refereed to the K_0 value obtained from triaxial test,considering the data of the flat dilatometer test（ DMT）,an empirical formula to calculate the K_0 of Ningbo area is proposed. The range and suggestive value of K_0 for different soil strata is presented which could provide technical support for the geotechnical design in Ningbo area.

关 键 词：静止土压力系数 扁铲侧胀试验 经验公式 

分 类 号：TU41[建筑科学—岩土工程]