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为深入研究黄土处于初始状态下的结构性状态量—构度指标,分别对基于单轴抗压强度试验的构度指标和试锥贯入度试验的构度指标进行了不同结构性黄土的试验对比研究.得到了两种试验确定的构度指标与含水率和强度之间变化规律以及对于含水率变化的敏感性,论述了两种试验方法确定的构度指标的合理性和适用性.结果表明:构度指标与单轴强度之间具有较好的相关性.构度随含水率的增大而降低,且在含水率较小时,这种变化更为明显.当高于天然含水率时,构度指标受含水率的影响变化不大.单轴抗压强度试验的构度指标作为土体初始结构性的状态量,反映土体除密度、粒度、湿度之外的固有物理力学性质,具有更好的合理性和优越性.
In order to further study the structural state quantity-structure index of loess in the initial state, different structural loess tests were conducted on the structural indexes based on the uniaxial compressive strength test and the structural indexes of the test cone penetration penetration test By comparing the results of two tests, the change rule between the water content and the moisture content and the sensitivity to the change of the moisture content were obtained, and the rationality and applicability of the structure indexes determined by the two test methods were discussed.Results The results show that there is a good correlation between the structure index and the uniaxial strength.The structure decreases with the increase of the water content and becomes more obvious when the water content is lower.When the water content is higher than the natural water content , And the constitutive index has little change under the influence of moisture content.As for the initial structural state quantity of the uniaxial compressive strength test, the constitutive index of the uniaxial compressive strength test reflects the inherent physical and mechanical properties of the soil besides density, grain size and humidity, Has better rationality and superiority.