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  本文關鍵詞： 三維地質建模 ArcGIS ModelBuilder 復雜地質體 自動建模　出處：《工程地質學報》2017年02期 　論文類型：期刊論文

【摘要】：與傳統(tǒng)的二維(2D)地質繪圖技術相比,三維地質建模技術能夠更加直觀、立體地展現(xiàn)地下巖層的結構和空間分布情況,在工程的規(guī)劃、設計、施工和風險評估等過程都具有重要的應用價值。針對工程領域的建模對象往往涉及復雜地質體,為實現(xiàn)模型的自動構建,本文提出一種基ArcGIS ModelBuilder的復雜地質體自動建模方法。首先,在ArcGIS平臺的支持下,以鉆孔數(shù)據(jù)和地質剖面圖為數(shù)據(jù)源,采用面向對象編程Python語言結合ArcPy包,通過編程實現(xiàn)鉆孔數(shù)據(jù)的自動預處理;其次,組合ArcScan自動矢量化和SkechUp人機交互對地質剖面進行預處理,從中提取出斷裂3D矢量線,將它們集中存儲于GIS空間數(shù)據(jù)庫;然后,利用ModelBuilder可視化建模工具,通過調用ArcToolbox的文件轉換和空間分析工具分別生成地層的三維實體模型和斷裂的三維表面模型,從而實現(xiàn)復雜地質體自動建模;進一步,通過矢量化切割、剖面和開挖多邊形作為TIN拉伸擴展工具的輸入,并結合ArcScene實現(xiàn)模型多種形式的可視化。最后,采用南京仙林地區(qū)三維地質調查項目獲取的鉆孔數(shù)據(jù)進行了建模實驗,建模結果表明:該方法具有準確、快速和自動化的優(yōu)勢,可為大范圍、大批量地質建模提供可靠的技術方案。
[Abstract]:Compared with the traditional 2D geological mapping technology, 3D geological modeling technology can show the structure and spatial distribution of underground strata more intuitively and stereoscopically, and can be used in engineering planning and design. The process of construction and risk assessment has important application value. The modeling object in engineering field often involves complex geological body, in order to realize the automatic construction of the model, This paper presents an automatic modeling method of complex geological bodies based on ArcGIS ModelBuilder. Firstly, with the support of ArcGIS platform and taking borehole data and geological profile as data sources, the paper adopts object-oriented Python language and ArcPy package. The automatic preprocessing of borehole data is realized by programming. Secondly, combining ArcScan automatic vectorization and SkechUp human-computer interaction to preprocess geological section, the fracture 3D vector lines are extracted from them, and they are stored in GIS spatial database. By using the ModelBuilder visual modeling tool, the 3D solid model of strata and the 3D surface model of fracture are generated by calling the file conversion and spatial analysis tools of ArcToolbox, respectively, so as to realize the automatic modeling of complex geological bodies. Through vectorization cutting, section and excavation polygon as the input of TIN extension tool, and combined with ArcScene to realize the visualization of various forms of the model. Finally, The modeling experiment is carried out by using the borehole data obtained from the 3D geological survey project in Xianlin area, Nanjing. The modeling results show that the method has the advantages of accuracy, rapidity and automation, and can be used in a wide range. Mass geological modeling provides reliable technical solutions.
【作者單位】： 淮陰師范學院城市與環(huán)境學院;南京師范大學地理科學學院;
【分類號】：P628.3

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