離岸基礎在均質黏性土之圓弧滑動承載力探討

Abstract

中文摘要 台灣這幾年積極推廣離岸風電(Offshore wind power)，都是透過自升式平台船進行風機的安裝。由於台灣風場的地質複雜，事前對於承載力的分析就相當重要。本文探討離岸基礎在均質黏性的土壤，藉由改變上土層厚度(H)及固定一半基礎寬度(b)的情況下，基礎發生圓弧破壞時的破壞半徑(r)及破壞角(θ)對於極限承載力的影響。研究利用Reddy and Srinivasan(1967&1971)所提出的理論(圓弧滑動破壞機制)、Matlab程式、Excel進行數值分析以及繪出基礎承載力因子圖與Reddy and Srinivasan(1967&1971)的基礎承載力因子圖進行比對。

Abstract In the past few years, Taiwan has actively promoted offshore wind power, and installed wind turbines through jack-up barges. Due to the complex geology of Taiwan’s wind farms, prior analysis of the bearing capacity is very important. This article discusses the offshore foundation on homogeneous cohesive soil, by changing the upper soil layer thickness (H) and fixing half the width of the foundation (b), the influence of the radius of failure (r) and the angle of failure (θ) on the ultimate bearing capacity during arc failure, The research uses the theory (Circular Failure Mechanisms) proposed by Reddy and Srinivasan (1967&1971), Matlab program and Excel for numerical analysis, and draws a basic bearing capacity factor diagram for comparison with the basic bearing capacity factor diagram of Reddy and Srinivasan (1967&1971).