應用穿地雷達技術偵測地中埋設管線

USING GROUND-PENETRATING RADAR TECHNIQUE TO DETECT THE BURIED PIPE LINES AND MANHOLE IRON COVER

黃天福(Tien-Fu Huang) ； 梁昇(Sheng Liang)

《中華水土保持學報》 24卷2期 (1993/11) Pp. 15-21

https://doi.org/10.29417/JCSWC.199311_24(2).0002

摘要

穿地雷達（GPR）技術是一種偵測地下埋沒物的有用工具。本文的目的，一是利用GPR偵測埋設RC管、塑膠管及人孔鐵蓋用以評估其在此方面的偵測能力；二是提供現場的操作經驗。開挖作業已證實偵測結果無誤。RC管在地面下17.0 cm深度處，兩支5吋直徑之塑膠管並排在地面下約103 cm深度處；鐵蓋在地面下15.5 cm深度處。土壤爲棕黃色坋粘土（CL）。在個案中，現址測深以電磁波傳播時間50 nsec爲最佳。關於波型圖，以線型剖面反射坡較掃瞄型影像更能顯示出波型變化特性。

關鍵字

穿地雷達 ； 鋼筋混凝土管 ； 塑膠管 ； 人孔鐵蓋

並列摘要

Ground-Penetrating Radar (GPR) Technique is a useful geophysical tool for detecting the buried objects in ground. The purposes of this article are to evaluate the functions of GPR in detecting the buried RC culvert, plastic pipe line and manhole iron cover and to suggest the in-situ detecting experience The excavation operation shows that the deteced results are correct. The RC culvert, a row of two plastic pipes each with Ø =5＂ and the circular iron cover of manhole locate approximately at the depths of 17, 103 and 15.5 cm, separately. The three objects detected are buried in silty clay (CL). For detecting the buried objects in shallow depth, say about 1.00 m below the ground surface in this case, the optimum propagation time (time scale range) of eletromagnetic wave is 50 nsec. The profile echo graph of waveforms in wiggle mode is superior to that in scanned image mode in characterizing the waveform variation.

並列關鍵字

GPR ； RC Culvert ； Plastic Pipe ； Manhole Iron Cover