Tensile mechanical properties of roots of Larix principis-rupprechtii
LI Xiao-Feng, CHEN Li-Hua, WANG Ping-Hua
College of Soil and Water Conservation, Beijing Forestry University, Key Lab. of Soil ＆ Water Conservation and Desertification Combating Ministry of Education, 100083，Beijing，China
Abstract：Larix principis-rupprechtii, as one of water and soil conservation pioneer species, the tensile mechanical property of its roots will play an important role in slope stability. In order to explore basic mechanics of its roots, peeled and not peeled roots of different length and diameters were carried out for indoor tensile test with different tensile rates. Results showed that tensile strength of not peeled roots of 100mm length with 10mm/min has no significant correlation with their diameter, while in the other conditions, tensile strength decreased with increasing diameter according to an inverse function. All root stress-strain curves were single-peak curves with elastic-plastic material characteristics. Both root length and peeled or not have significant effects on tensile strength, while tensile rate has no significant effect on tensile strength. The results in this paper could provide important basic data for discovering the interaction mechanisms between roots and soil and building slope stability model.
2012, Vol. 10 
