【摘要】：利用應(yīng)變控制式真三軸儀對陜西關(guān)中地區(qū)非飽和重塑黃土進行了固結(jié)排水常規(guī)三軸剪切試驗,研究壓實系數(shù)和含水率對重塑黃土強度變形特性的影響。研究結(jié)果表明:重塑黃土的抗剪強度隨著壓實系數(shù)和圍壓的增大而增強,應(yīng)力應(yīng)變曲線從弱硬化型向強硬化型轉(zhuǎn)變并向應(yīng)變軟化型發(fā)展;抗剪強度隨含水率的升高而降低,應(yīng)力應(yīng)變曲線以應(yīng)變硬化型為主;壓剪破壞形態(tài)呈剪脹性,壓實系數(shù)和含水率越高,剪脹性越明顯;壓實系數(shù)對黏聚力和內(nèi)摩擦角影響較大,對黏聚力影響尤為明顯;含水率對黏聚力影響明顯,對內(nèi)摩擦角影響不大。
[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.
【作者單位】： 西安工業(yè)大學(xué)建筑工程學(xué)院;
【分類號】：U213.14;U416.16

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