水平基准基床系数试验方法与取值研究  

Study on the Test Method and Value of the Horizontal Subgrade Coefficient

作　　者：潘永坚 李高山 刘生财 欧阳涛坚 蔡国成 Pan Yongjian;Li Gaoshan;Liu Shengcai;Ouyang Taojian;Cai Guocheng(Zhe Jiang Engineering Investigation Institute, Ningbo , Zhejiang 315012, P. R. China)

机构地区：[1]浙江省工程勘察院,浙江宁波315012

出　　处：《地下空间与工程学报》2018年第3期712-718,共7页Chinese Journal of Underground Space and Engineering

摘　　要：岩土工程勘察中,考虑扁铲侧胀试验、室内固结试验在获得水平基床系数数值上存在的差异性,从测试原理、方法和尺寸效应分析,结合相关理论,提出了采用K0固结仪和考虑高径比(H/R)的新的测试试验方法和修正公式。结合软土地区重大勘察项目实践,采用扁铲侧胀试验和改进的K0仪固结试验,对流塑、可塑、软塑等3种稠度状态下的粘性土分别进行测试分析,对试验方法和修正公式进行验证。结果表明,两种测试试验方法下得到的水平基准基床系数基本一致,比值接近1,具有较好的可行性、合理性。In the geotechnical engineering investigation,considering the difference of the dilatometer test,consolidation test which obtain the horizontal subgrade coefficient. Analysis of the principle,method and dimensional effect of the test,relating the correlation theory. Finally,a new test method and the modified formula are presented which includes K0 consolidation instrument and the height to diameter ratio（ H/R）. Combined with the practice of major investigation projects in soft soil area,the test method and the modified formula of the cohesive soil under different conditions（ flow plastic,plastic and soft plastic） were tested and verified by using the dilatometer test and the modified K0 consolidation test. The results show that the numerical results obtained by the two methods are basically the same,the ratio is close to 1,and have good feasibility and rationality.

关 键 词：水平基床系数 扁铲侧胀试验 K0仪固结试验 尺寸效应 修正公式 

分 类 号：TU411[建筑科学—岩土工程]