摘要
GB 50007—2002《建筑地基基础设计规范》4.2.4中规定:经过预压固结的地基,土的抗剪强度指标可采用固结不排水试验测定。从理论上说,应用固结不排水剪测定的强度指标计算的抗剪强度并不总是高于用不固结不排水剪强度指标的计算结果,因此,也可能导致某些情况下,用前者测定的强度指标计算的地基承载力小于用后一种强度指标计算的结果。在采用规范中提供的地基承载力系数的基础上,运用正交设计方法,选取地基承载力计算公式中影响因素的典型组合,对不同组合条件下,采用两种不同强度指标的地基承力计算结果进行对比,指出可能导致用固结不排水剪强度指标时地基承载力偏小的情形。
According to 4.2.4 of the GB 50007-2002 Code for Design of Building Foundation National Standard ,for the preloaded-consolidated foundation, the shear strength parameters may be tested by consolidated-undrained test. Theoretically, the shear strength calculated by strength parameters measured by consolidated-undrained test is not always higher than that calculated from unconsolidated-undrained strength parameters, which might lead to the fact that the ground bearing capacity calculated from CU strength parameters is lower than that from UU strength parameters. The eases are analyzed when it occurs by applying the orthogonal design method and adopting the computational formula of ground bearing capacity and its coefficients of ground bearing capacity offered by the Code.
出处
《工业建筑》
CSCD
北大核心
2009年第5期118-119,132,共3页
Industrial Construction
基金
江西省自然科学基金资助项目(0350054)
关键词
地基规范
地基承载力
试验方法
正交设计
foundation code
ground bearing capacity
test method
orthogonal design
