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    Title: 行道樹根系破壞人行道硬體之評估系統
    Other Titles: Evaluation on the damage of sidewalk by street tree roots
    Authors: 賴建宏;Lai, Jian-hung
    Contributors: 淡江大學土木工程學系碩士班
    楊長義;Yang, Zon-yee
    Keywords: 行道樹;根害;人行道硬體;根柵;Street trees;roots damage;sidewalk hardscape;root barrier.
    Date: 2009
    Issue Date: 2010-01-11 05:26:40 (UTC+8)
    Abstract: 樹木在都市中可補充氧氣、淨化空氣、遮擋烈日輻射,還能藉由吸收輻射量調節氣候,於是以行道樹綠化城市成為民眾之熱門話題。行道樹根系破壞人行道硬體(邊框、鋪面、緣石)問題在台灣處處可見,這類根害問題也常耗損很多維修經費。本文藉由回顧國內、外前人對行道樹根害的調查研究,進而訂制一套對行道樹根系破壞人行道硬體的評估系統,並且整理出一些防治行道樹根系破壞人行道硬體的工法,希望能提供對行道樹種植、維護管理方面的參考。
    依本文研究結果歸納如下:(1)在台灣:樹高、胸徑、根系裸露、種植方式、鋪面種類、硬體破壞程度,六項因素與人行道硬體破壞程度有明顯正相關。(2)本評估系統依這六項影響程度之重要性分別給予高低配分,對人行道硬體破壞愈大其配分愈高。其中,評分規則則是依文獻研究經驗而制定六項評估項目中的分級級距與其權重。(3)防治根系破壞植穴週遭硬體是行道樹維護管理的重點,可從「防」與「治」二方面著手:「防」是最重要的積極做法,「治」是一種消極的捕救措施。(4)第一階段評分[第(1)~(5)項]愈高表示行道樹根系較會破壞人行道硬體;分數愈低表示行道樹根系對人行道硬體的影響愈低。(5)評分的[第一階段分數]若不超過50分,此時可僅施作預防工法,以降低植穴整體將來被破壞的可能性;[第一階段分數]若是在50分以上,須採用治療補救措施,且需進行第二階段的評分。若[第二階段分數]≧20分,本文建議將行道樹移植;若[第二階段分數]<20分,則建議可對行道樹根系進行修根處理。
    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:[土木工程學系暨研究所] 學位論文

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