关中地区重塑黄土强度特性三轴试验研究
发布时间：2018-12-17 20:47
【摘要】：利用应变控制式真三轴仪对陕西关中地区非饱和重塑黄土进行了固结排水常规三轴剪切试验,研究压实系数和含水率对重塑黄土强度变形特性的影响。研究结果表明:重塑黄土的抗剪强度随着压实系数和围压的增大而增强,应力应变曲线从弱硬化型向强硬化型转变并向应变软化型发展;抗剪强度随含水率的升高而降低,应力应变曲线以应变硬化型为主;压剪破坏形态呈剪胀性,压实系数和含水率越高,剪胀性越明显;压实系数对黏聚力和内摩擦角影响较大,对黏聚力影响尤为明显;含水率对黏聚力影响明显,对内摩擦角影响不大。
[Abstract]:The conventional triaxial shear test of consolidation and drainage of unsaturated remolded loess in Guanzhong area of Shaanxi Province was carried out by using strain-controlled true triaxial apparatus. The effects of compaction coefficient and moisture content on strength and deformation characteristics of remolded loess were studied. The results show that the shear strength of remolded loess increases with the increase of compaction coefficient and confining pressure, and the stress-strain curve changes from weak hardening type to strong hardening type and develops to strain softening type. The shear strength decreases with the increase of moisture content, the stress-strain curve is mainly strain hardening type, the compressive shear failure mode is shear dilatancy, the higher the compaction coefficient and moisture content, the more obvious the shear expansion. The influence of compaction coefficient on cohesion and internal friction angle is great, especially on cohesion, while moisture content has obvious effect on cohesion force, but has little effect on internal friction angle.
【作者单位】： 西安工业大学建筑工程学院;
【分类号】：U213.14;U416.16
本文编号：2384778
[Abstract]:The conventional triaxial shear test of consolidation and drainage of unsaturated remolded loess in Guanzhong area of Shaanxi Province was carried out by using strain-controlled true triaxial apparatus. The effects of compaction coefficient and moisture content on strength and deformation characteristics of remolded loess were studied. The results show that the shear strength of remolded loess increases with the increase of compaction coefficient and confining pressure, and the stress-strain curve changes from weak hardening type to strong hardening type and develops to strain softening type. The shear strength decreases with the increase of moisture content, the stress-strain curve is mainly strain hardening type, the compressive shear failure mode is shear dilatancy, the higher the compaction coefficient and moisture content, the more obvious the shear expansion. The influence of compaction coefficient on cohesion and internal friction angle is great, especially on cohesion, while moisture content has obvious effect on cohesion force, but has little effect on internal friction angle.
【作者单位】： 西安工业大学建筑工程学院;
【分类号】：U213.14;U416.16
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