天津港区土质附着力与物理力学指标关系及应用案例

Relationship between soil adhesion and physic-mechanical index in Tianjin port & application case

从天津港区易糊刀具黏性土质特性出发,指出决定易糊刀具黏性土质的附着力关键指标为含水率、塑性指数和凝聚力。基于大量的易糊刀具土质室内土工试验资料,应用数理统计方法,对附着力与关键指标含水率、塑性指数和凝聚力之间的相关关系进行了研究分析。结果表明:1)附着力、含水率和塑性指数经验公式的回归系数均在0.8以上,具有较高可靠性;2)天津港航道区域在天然状态下的黏性土质附着力约为塑性指数的3倍。针对具体黏性土质疏浚施工案例,经过附着力和关键指标值的比对,判断出挖掘该状态黏性土具有糊刀具的可能性。

According to characteristics of easy pasting tool clay in Tianjin port, this paper points out that the key indicators for adhesive forces of easy pasting tool clay are its moisture content, plasticity index and cohesion. Based on a lot of indoor soil geotechnical test data about easy pasting tool clay, this paper studies and analyzes the relationship between adhesion and key indicators including moisture content, plasticity index and cohesion by the mathematical statistic method.The results show that： 1） the regression coefficients of empirical formula of adhesive, moisture content and plasticity index are above 0. 8, which means high reliability; 2） adhesive force of clay is about 3 times of its plasticity index under natural condition in Tianjin port.Aiming at the case of cohesive soil dredging construction and through the comparison of the adhesion and its key indicators, the paper conclude that it is possible for cohesive soil to paste tool under this condition.