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本文介绍的平面应变仪,试样尺寸为长10厘米、宽5厘米、高10厘米,采用柔性加压袋施加小主应力,小型土压力盒量测中主应力,刚性端板施加大主应力,并能量测试样中的孔隙压力和体积变化。文中同时介绍了σ_1=σ_3固结条件下的剪切试验和K_0固结条件下的剪切试验,以及按八面体应力状态进行成果整理的方法,并与轴对称三轴试验成果进行了对比,提出了土的应力状态对其抗剪强度破坏标准产生影响的几点看法。
This article describes the plane strain gauges, the sample size is 10 cm long, 5 cm wide, 10 cm high, the use of flexible pressure bags to impose a small principal stress, small earth pressure box to measure the main stress, the rigid end plate to apply the main stress , And pore pressure and volume changes in the energy sample. In the paper, the shear tests under the consolidation condition of σ_1 = σ_3 and the shear tests under the K_0 consolidation condition as well as the methods of finishing the results according to the octahedral stress state are also introduced. Compared with the axial symmetry triaxial test results, Some opinions on the influence of soil stress state on the failure criterion of shear strength are put forward.