三軸試験の試験条件が河川堤防土の強度定数に及ぼす影響
キーワード:
iver levee,
sand grave,
sand,
triaxial test,
test condition,
numerical simulation,
soil structure
2013 年 19 巻 p. 81-86
詳細
2013 年 19 巻 p. 81-86
Soil parameters using for a stability inspection of river levee against seepage failure are very important. Recently, not only CU test for the triaxial test, but also CD and C̅U̅ tests are recommended for the determination of the strength parameters. However, in the case of low dry density of specimens, there is big difference among ϕcu obtained by CU test, ϕ’ obtained by C̅U̅ test and ϕd obtained by CD test. A series of CU, C̅U̅ and CD tests for various soil materials sampled from real river levees are carried out, in order to conform the difference of the strength parameters obtained from different test conditions. Next, a numerical simulation by SYS Cam-clay model is conducted to discuss the mechanism of the difference of the test result.
