摘要
古树和部分城市大树的树干内部,经常有空洞、腐朽等影响树木健康和安全性的缺陷存在。以筛查古树和城市大树树干内部缺陷为目标,测定了北京地区几种常见树种的古树和城市大树健康树干的多个径向应力波波速,对每个树种的应力波波速测量值进行了正态统计分析,基于95%置信水平原则确定了用于判别树干内部是否存在缺陷的应力波临界波速值,进而形成了用于树干内部缺陷筛查的应力波临界波速的确定方法。结果表明,北京地区8种常见古树及城市大树油松、白皮松、侧柏、桧柏、刺槐、英桐、美桐和银杏的树干径向应力波临界波速值分别为1225、1394、1620、1864、2055、1639、1485、1728 m·s^(-1)。树干内部缺陷筛查验证性试验表明,形成的应力波临界波速确定方法是可行的。
There are often hollows,decay and other defects inside the trunks of ancient and some large urban trees,which may compromise their health and safety.The purpose of this study was to develop a method to screen the internal defects in trunks of ancient trees and large urban trees.Multiple radial stress wave velocities were measured in the healthy trunks of several common tree species occurring in Beijing.These stress wave velocity measurements were subjected to normal statistical analysis to identify the stress wave threshold velocity for determining the presence of defects inside tree trunk based on the 95%confidence principle.Eventually,the method of determining stress wave threshold velocity for trunk internal defect screening was summarized and developed.Radial stress wave threshold velocities of 8 common ancient trees and large urban trees in Beijing were obtained as well.These velocities were 1225,1394,1620,1864,2055,1639,1485,and 1728 m·s^(-1) for Pinus tabuliformis,P.bungeana,Platycladus orientalis,Sabina chinensis,Robinia pseudoacacia,Platanus×acerifolia,P.occidentalis,and Ginkgo biloba,respectively.The verification test showed that the critical wave velocity determination method developed in this paper was feasible.
作者
徐鹏飞
管成
张厚江
宋海欧
袁江玉
段超
郭旺
XU Peng-fei;GUAN Cheng;ZHANG Hou-jiang;SONG Hai-ou;YUAN Jiang-yu;DUAN Chao;GUO Wang(School of Technology,Beijing Forestry University,Beijing 100083,China;Joint International Research Institute of Wood Nondestructive Testing and Evaluation,Beijing Forestry University,Beijing 100083,China;Beijing Institute of Ancient Architecture,Beijing 100050,China;Administration Office of the Ming Tombs in Changping District, Beijing 102213,China;Administration Office of the Temple of Heaven Park,Beijing 100061,China)
出处
《西北林学院学报》
CSCD
北大核心
2022年第1期222-229,共8页
Journal of Northwest Forestry University
基金
中央高校基本科研业务费专项基金(2021ZY71)
北京市文物局2018年课题:北京文化遗产保护实践探索研究(一)——树木对文物建筑保存状态影响研究(一期)
北京市公园管理中心科技课题(zx2020002)。
关键词
树干内部缺陷
缺陷筛查
应力波
临界波速
trunk defect
defect screening
stress wave
threshold velocity
作者简介
第一作者:徐鹏飞,博士生,研究方向:树木无损检测,E-mail:xupengfei.nick@foxmail.com;通信作者:张厚江,教授,研究方向:木材无损检测,E-mail:hjzhang6@bjfu.edu.cn。
