臺灣西南部泥岩坡地沖蝕防治工法之應用研究

Application of Soil Erosion Control Measures on Slopeland Located at Mudstones in the Southwestern Taiwan

蔡光榮(K. J. Tsai) ； 陳昆廷(K. T. Chen) ； 許中立(C. L. Hsu) ； 林金炳(J. B. Lin)

《鑛冶：中國鑛冶工程學會會刊》 54卷4期 (2010/12) Pp. 125-138

https://doi.org/10.30069/MM.201012.0011

摘要

臺灣西南部泥岩地區面積廣濶達1,014km^2，因沖刷劇烈形成惡地形，植生綠化困難度高。又因其特殊地質岩性與南臺灣氣候因素之影響，泥岩風化後之土壤透水性不佳，一旦泥岩邊坡開挖後受水蝕裸露，則不易自然恢復植生，更易擴大泥岩地區之土砂受災範圍和提升其環境土砂災害潛感值。有鑑於此，本研究乃以透氣防水樹脂（KMCO-955）作為泥岩坡地噴植膠結材料，並將其應用於高雄縣田寮鄉月世界泥岩坡面沖蝕控制，另輔以統計分析方法探討該項化學藥液膠結材質作為泥岩地區坡面土壤沖蝕防治之可行性。由試驗結果顯示噴灑透氣防水樹脂之泥岩坡地土樣沖蝕流失量，僅為未經透氣防水樹脂處理土壤沖蝕量之10%~20%，據此顯示經噴播不同濃度之KMCO-955膠結材料後，泥岩坡面可達80%~90%之土壤沖蝕控制效果，此結果應可提供後續泥岩護坡抗蝕工程實務之參考依據。

關鍵字

泥岩 ； 土壤沖蝕 ； 化學穩定處理

並列摘要

About 1,014 m^2 of mudstones scattered all over the southwestern Taiwan. These badland areas have soil mass movements and soil erosions that are detrimental to the live hood of people and the development of agriculture and industry. A chemical stabilization treatment is often considered to be the most efficient technique for the conservation of the mudstones. We propose an optimal selection of KMCO-955 to control the runoff erosion and protect mudstone slopelands. We concentrated on the soil sampling and laboratory experiments of soil erosion control by using a rainfall simulator for 3 rainfall intensities (200mm/hr, 300 mm/hr & 400 mm/hr). The rainfall simulation and soil erosion tests were conducted to quantity the soil losses for 4 different cementation ratios of KMCO-955 (1%, 5%, 10% and 20%). We also measured the soil hardness and soil loss of the remolded soil samples. Results showed that KMCO-955 can reduce 80~90% of soil erosion compared to the soil samples without any chemical treatment. These ranges of KMCO- 955 concentration can provide a good guideline for an optimal selection of KMCO-955 for soil erosion control.

並列關鍵字

Mudstones ； Soil Erosion ； Chemical Stabilization Treatment