A Comparison on the Behavior of Vertical Single Pile and Group Piles between in Submerged Sands and Dry Sands under Cyclic Lateral Load

• Main Authors: YING-JHONG LYU, 呂瑩鐘
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/82226573038210073261

碩士 === 逢甲大學 === 土木工程所 === 98 === In this proposed research project, a comparison of the pile behavior under cyclic lateral load in submerged sands and dry sands was to be performed by model pile test. The purpose of this study was to explore the effect of water on the pile behavior as well as to propose suggestions for the design of pile foundation constructed on seabed. A well established model pile testing system was used for this project to perform tests. Comparison of bending moment along pile shaft and lateral displacement of pile head was made. The test results show pile head lateral displacement in submerged sands is greater than that in dry sands, and the pile head lateral displacement are affected by several factors such as the size of pile, the different cyclic lateral load, the number of group piles, and the different alignment of pile groups; in most cases, the maximum bending moment along the pile shaft in submerged sands is usually greater than that in dry sands. In single pile study: in submerged sands and dry sands, the location of maximum bending moment on pile shaft occurred at the depth between 10 times to 15 times of pile outer side length or diameter. In group piles study: in submerged sands, the location of maximum bending moment on pile shaft occurred at the depth between 5 times to 25 times of pile outer side length or diameter; however, in dry sands, the location of maximum bending moment on pile shaft occurred at the depth between 10 times to 15 times of pile outer side length or diameter.