邊坡擋土工法選定之研究

Study on Slope Stabilization Methods Selection

廖洪鈞(H. J. Liao) ； 游行健(S. J. Yo) ； 郭瑞柏(J. B. Kuo)

《地工技術》 94期 (2002/12) Pp. 81-92

https://doi.org/10.30140/SG.200212.0008

摘要

本文藉由蒐集道路和社區邊坡已破壞與未破壞案例，配合鑑別分析法和統計套裝軟體－SPSS，建立邊坡崩塌機率之鑑別函數和邊坡擋土工法選定的機制。利用邊坡穩定影響因素之評估準則表，將影響邊坡穩定之子因素量化，進行鑑別分析，得到具顯著鑑別力之各項子因素，包括岩盤層態、地面排水狀況、挖填方情形、坡趾開挖、坡面風化程度和邊坡維護等，將這些具顯著鑑別力之子因素與不同邊坡擋土工法進行鑑別分析，建立不同邊坡擋土工法之鑑別函數，透過這些鑑別函數，求取邊坡擋土工法之崩塌機率及正典鑑別空間中各類擋土工法的落點位置。藉此可協助工程師從邊坡地質條件、坡面排水條件、和人為因素等，初步選定適用於該邊坡之擋土工法。

關鍵字

邊坡 ； 崩塌機率 ； 正典鑑別分析 ； 邊坡擋土工法

並列摘要

Based on the failed and not failed slope cases collected from the public roads or the residential communities, this study will propose a method to select adequate slope stabilization method for specific slope in terms of failure probabilities. This method is established by integrating the canonical discriminant analysis, statistic software SPSS, and slope cases from the field. The influencing factors on the stability of slope are quantified using an evaluation table and substituted to the SPSS analysis. Totally, six factors with significant discriminating ability were identified, namely the structure of bedrock, surface drainage condition, slope cutting, toe excavation, weathering of slope surface, and slope maintenance. These factors are used to establish the discriminant functions for various slope stabilization methods. Using these discriminant functions, the failure probability of a slope protected by certain slope stabilization method can be estimated. In addition, the optimum slope stabilization method can also be selected based on the position of calculated result in the discriminant coordinates. This method can provide a useful means to guide the engineers chossing a suitable slope stabilization method according to the geological condition, drainage condition, and human activity factor of a particular slope.

並列關鍵字

slopes ； failure probability ； canonical discriminant analysis ； slope stabilization methods