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題名 | The Development of the Vein System in Central Taiwan--A case study of the section from Kukuan to Tekee along the Central Cross Island Highway=臺灣中部岩脈系統之發育﹣﹣中部橫貫公路谷關﹣﹣德基地區之個案研究 |
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作者 | 盧佳遇; |
期刊 | 中國地質學會會刊 |
出版日期 | 19920100 |
卷期 | 35:1 1992.01[民81.01] |
頁次 | 頁77-94 |
分類號 | 358.7232 |
語文 | eng |
關鍵詞 | 中部; 谷關; 岩脈系統; 臺灣; 德基; 橫貫公路; |
中文摘要 | 本文選擇臺北市郊直潭地區崩積層之山坡地,作為其力學行為及邊坡穩定性探討之研究區域。此區之崩積層主要為大小不同顆粒之風化砂岩塊及頁岩塊所組成。民國六十九年以前,本區一些坡地上之建築規劃在未經先前之地質調查工作時,更開始了此崩積層坡體上之開發工作,經過一系列之開挖作業後,現場便陸陸續續的產生了幾處破壞崩滑的現象,引起不少財物上之損失。本研討工作,主要以試驗室內之實驗工作來瞭解崩積層內各大小不同塊石的組合,在含水飽和及未飽和之不同狀況下其剪尹強度的變化,並配合現場地貌圖之作業,將其一併應用於坡體之上穩定性分析。這些分析結果顯示,影響崩積層坡體穩定性的最主要原因,可能與其地質材料組合中之細粒料的力學行為以及地下水位高低有最密切的關連。此試驗室之研究方式與地貌圖之整合應用結果,也可作為爾後崩積層坡地破壞中一項分析的參考模式。 |
英文摘要 | The stability and mechanical behaviour of colluvium slopes in the vicinity of Chitan, Taipei, in the north of Taiwan, is assessed. This colluvium is composed of weathered shale and sandstone of various grain sizes. Before 1980, housing development in this area was carried out without prior site investigation. Several major translational slides in the colluvium have been reactivated during excavation and construction associated with development, resulting in extensive damage to property and services. The application of geomorphological mapping techniques is postulated to be an essential prerequisite to construction projects in this area, because this can avoid the expense of significant remedial work through identification of problem areas. Shear strength of materials containing different particle sizes was investigated in both saturated and unsaturated conditions. These analyses have demonstrated that the stability of colluvium slopes may be directly correlated with the mechanical beaviour of the fine grained fraction of the sediments and the effects of groundwater. It is demonstrated that, regardless of the complexity of the material, shale colluvium behaviour is controlled by the shear strength of its finest components. The results of the laboratory studies and geomorphological mapping are combined to provide a geotechnical model for failure on the colluvium slopes. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。