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基于酸碱质子理论,探讨了重金属污染物渗入岩石后的侵蚀机制,并通过对流-弥散模型分析了元素铅(Pb)、镉(Cd)、铜(Cu)、锌(Zn)的延伸性能;采用黏弹性和损伤性单体模型组合法建立了重金属污染岩石的三维组合延伸裂变模型,探讨了不同延伸速率下侵入面的变形规律,并通过三轴静载试验对模型拟合结果进行了验证。结果表明:不同的重金属污染物在岩石中的侵入性能与延伸性能不同;岩性不同的污染岩石在同种试验条件下本构曲线与组合模型的拟合结果具有较好的一致性。
Based on the theory of acid - base protons, the erosion mechanism of heavy metal pollutants infiltrated into rock was discussed. The extension properties of lead, cadmium, copper and zinc were analyzed by convection - dispersion model. A three-dimensional combined extension fission model of heavy metal contaminated rock was established by the combination of viscoelasticity and damage monomer model. The deformation rules of invaded surface at different extension rates were discussed. The model fitting results were verified by triaxial static load test . The results show that different heavy metal pollutants have different intrusion behaviors and extensibility properties in rocks. The rock samples with different lithologies have good agreement with the fitting results of the constitutive model under the same experimental conditions.