【摘要】 通过直接拉拔试验研究了加载速率、根系埋深和不同树种对根系与土体的摩擦特性的影响.结果表明:被拉断的根系最大拉拔力和位移关系曲线分为陡峭上升和陡峭下降两个阶段,被拔出的根系最大拉拔力和位移关系曲线分为陡峭上升、陡峭下降和平缓下降3个阶段;加载速率或埋深增大时,根土静摩擦力及其对应位移亦增大;落叶松的根土静摩擦力及其对应位移比油松的根土静摩擦力及其对应位移大.更多还原

【Abstract】 Using a direct drawing tests of root soil interface of Pinus tabulaeformis and Larix gmelinii,friction characteristics of the interface was examined,and the influences of loading rate and burial depth of root were analyzed.The results show that,the curves of maximum pulling force and displacement of the roots which were broken had two steps: the steep rise and steep fall,while the curves of maximum pulling force and displacement of the roots which were pulled out had three steps: the steep rise,steep fall and gentle decline.The root soil static friction and its corresponding displacement increased with increasing loading rate and burial depth respectively.Both the root soil static friction and its corresponding displacement of Larix gmelinii were larger than that of Pinus tabulaeformis.更多还原