摘要
通过设计制作与原位K30载荷试验具有相同的应力路径特征与排水边界条件的试验装置,依据经典固结理论推导出等固结度控制方法与标准基床系数计算公式;引入变形模量与压缩模量之间的理论关系,推导出用压缩模量与静止侧压力系估算地层标准基床系数的公式。经室内外多次对比试验研究与试验验证,提出了采用直径为5 cm压板,模拟试样在原位受到的应力状态,进行分级加载测定地基土基床系数是可行的;提出了计算正常固结饱和黏性土基床系数计算公式。
The research achievements of the foundation bed coefficient are introduced based on simulated load tests.The test device which has the same stress path features and the drainage boundary conditions is designed and produced as the in-situ K30 load tests.According to the classical consolidation theory,formula for the iso-consolidation degree controlled method and the standard foundation bed coefficient is derived.The theoretical relationship between the deformation modulus and the compression modulus is introduced to derive the formula for estimating the standard foundation coefficient between the compressive modulus and the static lateral pressure coefficient.By comparing laboratory and in-situ tests and test verification,the pressure plate with a diameter of 5 cm is adopted to simulate in-situ stress state of in-situ specimens.It is feasible to carry out load tests on foundation coefficient of subgrade soil.The formula can be employed to calculate the foundation bed coefficient of the normally consolidated saturated clayey soil.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2011年第2期281-284,共4页
Chinese Journal of Geotechnical Engineering
关键词
基床系数
等应变
等固结度
K30
模拟载荷
foundation bed coefficient
iso-strain
iso-consolidation
K30
simulated load
