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|Other Titles: ||Evaluation on the damage of sidewalk by street tree roots|
|Authors: ||賴建宏;Lai, Jian-hung|
|Keywords: ||行道樹;根害;人行道硬體;根柵;Street trees;roots damage;sidewalk hardscape;root barrier.|
|Issue Date: ||2010-01-11 05:26:40 (UTC+8)|
Trees in the city can supply oxygen, clean air and keep out radiations from the burning sun. In addition, these can adjust climate by absorbing radiations. Therefore, using the street trees to make city green has become the populace the hot topic of discussion.. The issue that the street trees roots destroyed the hardscape in the sidewalk (frame, pavement, curb) is everywhere in Taiwan. This kind of roots damage issue was constantly waste a lot of repairing budget. This article formulated an evaluation on the damage of sidewalk by street tree roots by looking back the investigating research by former people all over the world. Besides, it made up some ways which can prevent and cure this issue. Finally, hope the ways can provide you with the reference to the street trees planting and maintaining management.
According to the research, it can generalize some results as follow: (1) In Taiwan: There are six factors have the positive relations with the sidewalk hardscape destruction degree, that is, tree height, diameter at breast height (dbh), bare roots, the ways of planting, the varieties of pavement, the destruction degree of hardscape. (2) The evaluation gives grades depend on the importance of the six effective degrees. With the great grades comes the great damage to the sidewalk hardscape. Among which, grade rules are made by the classified distance and the weight of the six evaluations which depend on the references (3) The point of the management of the street tree is preventing the roots destroy the hardscape around plant cave. It can start from the two aspects “prevent” and “cure”: “Prevent” is the most important and positive way, while “cure” is the negative way to redeem. (4) The first step:to score the damages (from first to fifth); and the scores cant let us know the effect of the sidewalk hardscape. It’s means the scores are more high, the damages are more serious. (5) In every step,the cores have two standards to score:the first step,if it lower than the fifty points, and we just make the prevent methods to drop the possibility of damage of the plants cave in the future; if it higher than the points, we should take the measure to cure and become the second of cores.The second step , if it more than twenty points, it suggests moving out the street trees.If it lower the points, we advise you that you trim the street tree roots.
|Appears in Collections:||[Graduate Institute & Department of Civil Engineering] Thesis|
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