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通过对河南平顶山膨胀土温度影响下的抗剪强度试验,揭示了膨胀土的强度随温度、含水量、干密度、压力等参数变化的规律。结果表明:相同压力作用下膨胀土强度随含水量不同有较显著的变化,随含水量增加而减小。但当含水量增加到一定程度,强度不再随压力而变化,即内摩擦角为0。当含水量较高时,温度影响显著,相同压力、含水量和干密度情况下,液相为全液体时,随温度的升高抗剪强度增大;当液相有部分结冰时,其规律与干密度的大小有关。含水量较小时,压力较小情况下,温度对抗剪强度影响不明显。
Through the shear strength test of expansive soil temperature in Pingdingshan, Henan Province, the law of expansive soil strength with temperature, water content, dry density, pressure and other parameters was revealed. The results show that the strength of expansive soil under the same pressure has a significant change with different water content, and decreases with the increase of water content. However, when the moisture content increases to a certain extent, the intensity no longer changes with the pressure, that is, the internal friction angle is zero. When the water content is high, the temperature has a significant effect. Under the conditions of the same pressure, water content and dry density, the shear strength increases with the temperature when the liquid phase is all liquid. When the liquid phase is partly frozen, Law and dry density of the size. When the water content is small, the effect of temperature on the shear strength is not obvious under the condition of low pressure.