臺灣西南部主要泥岩坡地所含粘土之物化特性研究

On the Physio-chemical Properties of Mudstones in the Foothills of South-Western Taiwan

顏富士(Fu Su Yen) ； 蔡鎰輝(Yii Hwei Tsai)

《鑛冶：中國鑛冶工程學會會刊》 29卷3期 (1985/09) Pp. 102-114

https://doi.org/10.30069/MM.198509_29(3).0009

摘要

臺灣西南部泥岩之組成粘土礦物主要為依萊石（Illite），約佔22至60％間，及部份綠泥石（Chlorite）；呈低膨脹性，並於塑性轉液性過程中具相當緩和作用。泥岩含大量之鈉離子，介面電動位達7mv以上，pH值亦高達9，高價陽離子易形成氫氧及碳酸鹽化合物，因此乾雨季交替下之泥岩性質，由微觀及巨觀言，由Na^+造成之影響頗巨。且泥岩之膠結力差，不易滲水，易遭剝離流失。

並列摘要

A study on the properties of the mudstones related to the clay minerals present in south-western Taiwan has revealed that: Clay minerals, chiefly illite with small amount of chlorite, have low swelling capability. The strata possess high Na^+ contents (especially for the olders) and the ZP excess 7 mV. The high pH (8-9) values of the pore water possibly indicate the multivalent cations will precipitate as hydroxides or carbonates. During the alternation of the wet and dry seasons, the slope stability in the area is controlled by the prevailing Na^+. The relative low in consolidation but tending to check the downward progression of surface water of the mudstones also accounts for the surface erosion.