CAJ | 학술논문

利用自主改造的、大主应力与小主应力方向由刚性加压板加载、中主应力方向由围压室液压加载的自动控制刚柔复合真三轴仪,对上海原状软土进行同一π面上不同洛德角真三轴固结排水剪切试验.原状土样通过分块抽样法获取,共进行了5组不同洛德角(0°、15°、30°、45°和60°)排水剪切试验.试验结果显示,上海原状软土抗剪强度、屈服和破坏点位置随洛德角的增大而减小,体积变化量先增大后减小.三向应力状态下上海软土的破坏强度接近空间滑移面(SMP)破坏准则.
이용자주개조적、대주응력여소주응력방향유강성가압판가재、중주응력방향유위압실액압가재적자동공제강유복합진삼축의,대상해원상연토진행동일π면상불동락덕각진삼축고결배수전절시험.원상토양통과분괴추양법획취,공진행료5조불동락덕각(0°、15°、30°、45°화60°)배수전절시험.시험결과현시,상해원상연토항전강도、굴복화파배점위치수락덕각적증대이감소,체적변화량선증대후감소.삼향응력상태하상해연토적파배강도접근공간활이면(SMP)파배준칙.
A series of isotropic consolidated drained true triaxial tests with different Lode angles in the same π plane are carried out with an automatic controlled mixed boundary true triaxial apparatus. The maximum and minor principal stresses are applied by two pairs of rigid platens; and the intermediate principal stress is applied by water pressure in triaxial cell. Undisturbed soil sample is prepared by block sampling method; and totally 5 drained tests with different Lode angles (0°, 15°, 30°, 45°, 60°) are presented. Test results show that the shear strength, the yielding & failure points of Shanghai soft clay decrease while Lode angles increase. The volume change increases first and turns to decrease when Lode angle is larger than 30°. In general, three-dimensional strength of the Shanghai soft clay obeys the SMP (spatial mobilized plane) failure criterion.