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題 名 | 蘭陽平原三維淺層地下構造之探討=A Study on Three Dimensional Shallow Subsurface Structure of Lanyang Plain |
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作 者 | 趙紹錚; 黃宏謀; 許智豪; | 書刊名 | 宜蘭大學工程學刊 |
卷 期 | 4 2008.02[民97.02] |
頁 次 | 頁53-74 |
分類號 | 441.1 |
關鍵詞 | 蘭陽平原; 三維淺層地下構造; 鑽孔資料; S波剪力波速; 地球物理; 土木工程; Lanyang plain; Three dimensional subsurface; Boring logs; S-wave velocity; Geophysicist; Civil engineer; |
語 文 | 中文(Chinese) |
中文摘要 | 本研究之目的為結合地球物理學家探討淺層地下構造之分層結果與土木工程師所能取得接近地表土層之詳細資料,以求得蘭陽平原完整的三維淺層地下構造。地球物理學家與土木工程師對淺層地下構造探討的方法與結果皆有所差異,然兩者各有其優缺點,故本研究將這兩個領域各自專精的資料相互結合,用來求得蘭陽平原完整的淺層地下構造。本文首先依據黃有志(2003)蘭陽平原上九個測站淺層S波速度構造之點資料,及中央地質調查所出版的宜蘭縣數值地質圖所顯示之蘭陽平原邊界的資料,利用三維繪圖軟體來建置蘭陽平原三維淺層地下構造,此部份之結果顯示蘭陽平原淺層地下構造由淺而深可分為三層,分別為沖積層、更新世層與廬山層。然而利用前述的作法只能將淺層地下構造粗略分層,無法顯示各分層(尤其是表層)的詳細構造;反之,土木工程師在探討淺層地下構造時,因受機具與經費的限制,所探討範圍僅為接近地表之土層的詳細構造。有鑑於此,本研究收集宜蘭地區771孔鑽探資料,並結合地球物理方式所獲得的粗略分層結果,建置蘭陽平原完整的三維淺層地下構造。本研究的結果可應用於工程防災領域,例如根據本研究的結果,便可利用SHAKE程式進行演算,求得沈積層受地震的反應,並據以評估建築物的安全性。 |
英文摘要 | The purpose of this study presented herein is to obtain the integral three dimensional subsurface structure of Lanyang Plain using the combination of the subsurface data inferred from geophysicist's perspective and the detailed boring log data close to ground surface from civil engineer's perspective. The geophysicists and civil engineers use different methodologies to estimate the subsurface structure, and each of these methodologies has its advantages. Therefore, this study selects the excellent results from the two fields and then combines them to provide a more comprehensive picture of the subsurface structure of Lanyang Plain. This study employs the S-wave velocity measurements from nine survey stations within the Lanyang Plain (Hwang, 2003) and the digital boundary of Lanyang Plain based on the Ilan County geologic map published by the Central Geological Survey, utilizing a three-dimensional cartography software to establish the subsurface structure of Lanyang Plain. The findings confirmed that the strata of Lanyang Plain can be divided into three layers from the top down, namely Alluvium layer, Pleistocene layer, and Lushan Formation layer, respectively. However, the above mentioned methodology is only capable of providing rough-cut subsurface layer information instead of detailed one, in particular for the surface layer. On the other hand, civil engineers can simply explore the surface layer close to the ground level due to machinery capacity and expense limit. In this study, we col1ect hundreds of representative boring data within the Lanyang Plain and combine the subsurface structure of Lanyang Plain obtained by geophysicist's method to provide a clear picture of the subsurface structure of Lanyang Plain. The findings of this study can be applied to the field of engineering disaster reduction, such as the calculation for the ground response subject to earthquake using the SHAKE computer program and the evaluation of the safety of buildings in a seismic event. |
本系統中英文摘要資訊取自各篇刊載內容。