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通过集中降雨过程3处典型遗址温度和含水率的实时监测,发现遗址内部不同位置土体经历耦合作用的频率与程度存在差异.通过对分别掺入不同含量Na_2SO_4、NaCl,经历不同期次干湿循环的遗址土重塑样的强度指标测试和粒度分析,得出试样的抗压强度、抗拉强度、内聚力、粗粉粒质量分数和粒度分维值都随含盐量和干湿循环次数的增加而产生规律性调整.数学统计分析证明不同频率与程度耦合作用下遗址土宏观强度指标的变化与粒度分析指标调整之间存在定量关系,分析和讨论了干湿盐渍耦合作用下遗址土强度劣化的本质原因、遗址消亡过程的形式和速度与遗址土强度劣化过程之间的联系.
Through the real-time monitoring of the temperature and water cut of three typical sites in the concentrated rainfall process, it was found that there was a difference in the frequency and degree of soil coupling under different sites within the site.By adding different contents of Na_2SO_4 and NaCl respectively, The results of strength index test and particle size analysis show that the compressive strength, tensile strength, cohesion, coarse particle size fraction and particle size fractal dimension of sample are both affected by the salt content and the number of wet-dry cycles .Mathematical statistic analysis proves that there is a quantitative relationship between macroscopic intensity index change and granularity analysis index adjustment under the coupling of different frequencies and degrees, The nature of the deterioration, the relationship between the form and speed of the extinction of the site and the process of deterioration of strength of the site.