透過您的圖書館登入
IP:3.235.227.36
  • 期刊

野溪清疏作業方法之四:野溪土石資源化現地利用之研究

Operation of Wildcreek Cleanout Work -4: Research on Debris as Resources Applied In-situ for Wild Creeks

摘要


台灣近年歷經颱風帶來超大豪雨,尤其莫拉克颱風,致使坡地產生大量崩塌,新崩落之土石再加上河道原有之淤積材料,非常容易引發土石流。大量土石隨洪水進入野溪及更下游的河道,導致溪床抬高及河道堵塞。附近居民及交通設施都受到很大的威脅。因此,在整體治理規劃應優先重視野溪土石的清疏工作。野溪清疏可以恢復河道排水系統的能力,並應將開挖之土石視為土石資源來利用,填築如因過去河道侵蝕造成的低窪地,並可同時施作保護措施,可以提高其安全性。改善土石粒料工程特性的可行方法,可應用作為地盤改良方面。加入一定比例的水泥混合現地土石,形成一種新的材料。可應用在許多情況下,如改善河岸的耐久性,保護河岸易侵蝕的材料,提高房舍道路的基礎等。野溪清疏計畫應包括需要清疏的土石量及分布狀況,並依現地可利用之土石材料及工程特性適當調整清疏計畫。總而言之,野溪土石之清疏作業可以幫助防止未來的洪水和土石流問題。這是在每年汛期前應該要做的重要工作,並應從整體流域經營管理的角度來擬定維護作業。面對龐大的土砂問題,於野溪河道實施清疏工作是比建構防砂設施嘗試阻擋土石下移,較為更好的方法。包含上述提起的細節,清疏計畫的標準程序應盡快的擬定。

並列摘要


In recent years, especially after typhoon Morakot, extreme torrential rain has resulted in large amounts of landslides. The debris that accumulated downslope blocks the drainage way and easily induces debris flow. The large amount of debris transported to wild creeks downstream may caused elevated riverbeds and channel siltation. All nearby villages and utilities are under this threat. The cleanout work of aggregated debris is of great priority after a disaster. The cleanout of the debris can help the natural drainage system to recover its capability, and the recovered material can be effectively reused. Low-lying lands that were eroded in the past can be filled and protection measures can be applied, so as to raise the level of safety. Feasible methods to improve the engineering properties of the material can be applied for the purpose of ground modification. A certain percentage of cement can be added to the debris in situ to form a new material, which can then be applied in many situations, such as improving the durability of road beds, protecting river banks from erosion, and promoting foundation properties, etc.

被引用紀錄


許正葳(2013)。臺東地區溪流淤積土砂現地與混凝土拌合其配比對強度影響之研究〔碩士論文,國立屏東科技大學〕。華藝線上圖書館。https://doi.org/10.6346%2fNPUST.2013.00161

延伸閱讀