油松根系与土壤摩擦性能研究

为探索林木根系与土壤的摩擦性能，在含水率和土壤干密度一定的条件下，采用施加拔出荷载对油松单根进行直接拔出试验，分析了根系埋深和加载速率对拔出过程和根土摩擦力的影响。实验表明,根系在拔出过程中有明显的阶段特性，在不同埋深和不同加载速率情况下，根土摩擦力和根系直径之间均呈幂函数关系，根土摩擦力和产生最大摩擦力时的滑移均随着根系埋深和加载速率的增大而增大。 

Tribological properties between roots of Pinus tabuliformis and soil.

In order to explore the friction performance between tree roots and soil, the direct pulling out test of single root for Pinus tabuliformis was carried out by implementing pull out load under certain moisture content and dry density of soil. And the effects of root burial depth and loading rate on drawing process and root soil friction were discussed. The study showed that root system was of obvious stage properties during the pulling out process; in the case of different burial depths and varied loading rates, there was a power function relationship between root soil friction and root diameter; also, both root soil friction and the largest displacement where the greatest friction occurring increased with the increase of root burial depth and loading rate.