本研究目的主要是對現存應用於基樁承受側向載重的非線性行為之p-y曲線的探討，將砂土、黏土的p-y曲線建立方法以及正規化曲線、修正的正規化曲線和經驗圖表做一歸納。此外，蒐集應用在邊坡、液化問題的p-y曲線建立方式。由於樁受側力的力學行為屬於樁土互制問題，受到許多參數的影響，本研究對一些較常被討論的參數進行整理，包括地基反力係數 、臨界樁長 、土壤極限承載力 等。現有的p-y曲線種類很多，分別對黏土、砂土的五種較常用的p-y曲線進行比較，以對p-y曲線模型的應用能有更進一步之認知。
經過檢討分析個案結果，在黏土部分，Dunnavant 和 O’Neill (1989)的p-y曲線與ICM (1984)在兩個黏土個案得到的樁頭位移與結果都偏差過大，預測偏向危險；UC (1977)在個案一偏向保守，但在個案二卻偏向危險，因此可能無法套用於所有黏土或載重條件。在砂土部分，Prakash 和 Kumar (1989)的兩個預測結果都偏向危險；載重在20000磅以下時，三種p-y曲線的預測結果與量測結果還算接近，期中又以Reese等人(1974)的p-y曲線最準確。以Prakash和Kumar(1989)預測兩個個案的結果都偏向危險。

The first chapter of this study is introduction which described the motivation, purpose, and content of this study. Chapter two introduced the development of p-y curves, including the criterion for constructing clay and sand p-y curve, normalization curves, and methods of refereeing tables and figures. Chapter three described the establishment of p-y curve under special conditions, including the conditions of inclined ground surface and liquefied sand. Chapter four presented functions and cases related to p-y curve and case study. Finally, in chapter 5, conclusions and suggestions were given.
The purpose of this study is to summarise the history and development of p-y curves used in different soil types, often used figures, tables, and equations were also organized for future use. Using the LPILE software, a conservative result was find out for sand and clay p-y curves, also, a guideline of the suitability of different p-y curves to different soil types were provided for future reference. From two test results of clay, Dunnavant and O’neill’s p-y curve has the largest pile head displacement, follow by ICM and UC. From two test results of sand, Murchison and O’Neill’s p-y curve provided a more accurate result in the first case, and the p-y curve presented by Reese et al. provided a more accurate result in the second case. However, the applied load has to be limited to less than 20,000 lb.

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