土壤對滲透排水管入滲效益影響之試驗研究

Soil Effects to Infiltration Efficiency of Pipe

林柏寧(Ling-Po Lin)

指導教授 ： 鄭光炎

國立臺北科技大學/工程學院/土木與防災研究所/碩士(2008年)

https://doi.org/10.6841/NTUT.2008.00581

摘要

台灣以往大多數都市開發計畫常採用不透水鋪面設計，因此希望於短時間內將雨水排除，導致每逢豪大雨，下游排水設施負擔增加亦縮短洪峰到達時間，提高淹水發生率，而雨水滲透設施之廣泛鋪設正是解決此問題有效方法之ㄧ。
雨水滲透設施種類繁多，包括貯留池，透水性鋪面及滲透管、溝等，但國內相關研究探討仍相當有限。緣此，本研究規劃試驗評估滲透排水管於砂土中之入滲效益，配合VSAFT2在相同條件下執行數值分析，說明兩者結果差異，驗證理論模式適用性，進而與前人研究成果比較，分析不同土壤對滲透排水管入滲效益之影響，期能供後續相關滲透排水管研究推動與實務應用參考。
研究成果歸納得知，滲透排水管在本研究試驗設置條件下，不同水位入滲效益之變化：當水位增高2倍則每增加1%土壤體積含水量所需時間加快約6~8 min；滲透排水管分別在前人與本研究試驗設置條件下，入滲效益之差異：管內水位=5.0cm時則於砂土中每上升1%土壤體積含水量所需時間較於沉泥質砂中快了約4~7 min。

關鍵字

雨水滲透設施 ； 滲透排水管 ； 入滲效益

並列摘要

Most of the city development programs in Taiwan, often take the impermeable pavements as the basic design; in order to drive out the water in a short time. However, when a downpour occurs, the drainage system downstream will not be able to stand it which will shorten the arrival of the flood peak and leads to a higher flooding incidence. Rainwater permeation facility being popularly used is one of the most efficient way for this problem.
Rainwater permeation facility has various facilities, including storage tank, permeable pavement , infiltration pipe, and ifiltration gtters ,etc. But there are still limited studies in this field here in Taiwan; in this case, this study is designed to evaluate the ifiltration ppe’s ifiltration eficiency along with the VSAFT2 and put them under the same conditions to execute computation model. To show their differences and to verify the applicability of VSAFT2; furthermore to compare it with former studies to see how the soil effects the infiltration pipe’s infiltration efficiency. Hopefully, to be able to provide some reference for further study of infiltration pipe.
From the study result, we can see that the infiltration efficiency of the infiltration pipe when water mark increases twice the height, the increase of 1% of value water content will fasten about 6-8mins. The difference between the former studies and this one is when water mark is 5.0cm., the time for value water content to increase 1% in the sand is 4-7mins less than in the loamy sand.

並列關鍵字

Rainwater permeation facility ； Infiltration pipe ； Infiltration efficiency

參考文獻

[23]林憲德，基地保水性能之研究，台北：內政部建築研究所，1998。

[2]Brooks, R. H., and A. T. Corey, "Hydraulic properties of porous media," Colo. State Univ.Hydrology Paper, no.3, 1964.

[3]Campbell, G., "A Simple Method for Determining Unsaturated Conductivity from Moisture Retention Data," Soil Sci., Vol.117, No.6, 1974.

[4]David R.Smith, "Permeable Interlocking Concrete Pavements," America: ICPI, 2000.

[5]Davidson, J. M., Nielsen, D. R., and Biggar, J. W., "The dependency of Soil Water Uptake and Release on the Applied Pressure Increment," Soil Science Society of America, Proc, 1996.