以林肯大郡為例談坡地開發之地工問題

Geotechnical Issues of Land Development on Slope-Study of Lincoln Community

劉泉枝(C. C. Liu) ； 鄭豫謹(Y. J. Cheng) ； 林衍竹(J. C. Lin) ； 周功台(K. T. Chou)

《地工技術》 68期 (1998/08) Pp. 87-96

https://doi.org/10.30140/SG.199808.0006

摘要

本文藉林肯大郡整體社區現況及地層分佈，說明坡地開發可能遭遇之工程問題。依實際地層調查與現場踏勘結果顯示，林肯社區除具順向坡地質特性之外，局部區域擁有深厚之回填覆蓋土層，衍生之工程問題包含沉陷、土層及擋土牆穩定、建物承受側向偏壓、表土沖刷、山谷地下水滲流等。此外地權上之限制，引致上邊坡及山谷集水範圍截排水系統建立困難，及下邊坡地界外之開墾開挖引致地層不穩定問題，亦為坡地開發所應正視之課題。嚴謹之施工計畫及施工管理，則為坡地開發不可或缺之條件，以免設計時安全性之考量，最後均被施工揮霍一空。

關鍵字

林肯大郡 ； 回填覆蓋土層 ； 沉陷 ； 穩定性

並列摘要

This article discusses the geotechnical engineering concerns in the hilly land development, in light of the Lincoln Community case. The local geological conditions at Lincoln Community may be characterized by dip sloping and some local thick fill soils. Major engineering concerns include settlement, stability of soil layer and retaining structures, lateral pressure on buildings associated with differential elevations, fill soil erosion, and groundwater seepage along the valley. In addition, other issues are also crucial in land development on slopes, such as the difficulty in establishing breakwater and drainage system at the upper valley because of land ownership, and the slope instability caused by further land development at the lower slope. Appropriate development plan and detailed construction management are pivotal to successful land development on slopes.

並列關鍵字

Lincoln Community ； fill soils ； settlement ； stability