摘要
对河北省张家口市沙地柏(Sabina vulgaris Ant.)根系进行抗拉试验,结果表明,沙地柏单根抗拉力随着根系直径的增大呈幂函数形式增大,单根抗拉强度随着根系直径的增加呈近似幂函数的关系递减,且相关系数都较高,沙地柏根系直径较大的根对边坡土体的加固作用有限,而根系直径较小的根抗拉强度较大,对根系护坡起主要作用;沙地柏单根伸长率、截面收缩率随着根系直径的增大呈直线形式减小,且相关系数都较高,根系直径较小,根系伸长率较大,从侧面反映出随着根系直径的增加,韧性减小。沙地柏根系直径范围在1.00~6.00 mm,抗拉力在25.0~369.0 N,抗拉强度在13.00~17.00 MPa,伸长率在8.00%~12.00%,截面收缩率在8.00%~12.00%,平均抗拉力为170.7 N,平均抗拉强度为14.89 MPa,平均伸长率为10.76%,平均截面收缩率为9.82%。
Tensile test is carried out on the Sabina vulgaris Ant.’s root in Zhangjiakou city, the results show that with the increase of diameter, the anti-tensile strength of single root increases in the form of power function, and the tensile strength of single root decreases with the increase of root diameter, and the correlation coefficient is higher. The root with large root diameter has limited reinforcement effect on slope soil, while the root with small root diameter has greater tensile strength,which plays a major role in root slope protection. The elongation rate and sectional shrinkage of single root decreases in the form of a straight line with the increase of the diameter, and the correlation coefficients is high.The root diameter is smaller,and the root elongation is larger, which reflect from the side that the toughness decreased with the increase of the root diameter. The diameter of the root is 1.00~6.00 mm, the anti-tensile strength is 25.0~369.0 N, the tensile strength is 13.00~17.00 MPa, the elongation rate is 8.00% ~12.00%, the sectional shrinkage rate is 8.00% ~12.00%, the average anti-tensile strength is about 170.7 N, the average tensile strength is 14.89 MPa, the average root elongation is 10.76%, the average section shrinkage is 9.82%.
作者
蒋希雁
何春晓
董捷
王皓宇
JIANG Xi-yan;HE Chun-xiao;DONG Jie;WANG Hao-yu(Hebei Key Laboratory of Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Zhangjiakou 075000,Hebei,China;Hebei University of Architecture,Zhangjiakou 075000,Hebei,China)
出处
《湖北农业科学》
2019年第22期138-140,144,共4页
Hubei Agricultural Sciences
基金
河北省自然科学基金项目(E2017404013)
河北省教育厅重点科研开发项目(ZD2017224)
张家口市科技计划财政资助项目(1611063B)
张家口市科技计划财政资助经费项目(1811009B-08)
河北省高等学校科学研究重点项目(ZD2019111)
