Influence of the Potential of the Soil Liquefaction for Shallow Foundation Structures-Taking the Kaohsiung Ling-Ya District as an Example

• Main Authors: CHEN,CHENG-YEN, 陳正彥
• Other Authors: HSIUNG,BIN-CHEN
• Format: Others
• Language: zh-TW
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/8rmzj3

碩士 === 國立高雄科技大學 === 土木工程系 === 107 === This study used the local standard penetration and soil classification test results to analyze the liquefaction potential. The soil liquefaction evaluation methods commonly used to make soil liquefaction potential map and analysis of data collection in Taiwan by NCEER/Seed Workshop, 2001. NJRA, 1996.HBF, 2012. This research used the largest earthquake that occurred in the Metropolitan Kaohsiung Area to conduct a simulation analysis , taking the Ling-Ya District (site) as an example, and using drilling hole formation data of 45 site to carry out the liquefaction potential analysis. The different of surface horizontal acceleration for site classification conditions will cause different degrees of damage for shallow foundation. Furthermore, the analysis results were used to evaluate the liquefaction subsidence for single building shallow foundation. When ground acceleration A=0.240g, there were more than 50% of the soil layer producing clear liquefaction at the Lingya District by analysis of stratum data. there will be obvious liquefaction at the Lingya District when earthquake agnitude reaches 5.5 by prediction. According to analysis results of PLAXIS UBCSAND-3D program, it can be known that groundwater table locate at GL-5.02m and GL-10.09m, and the seismic condition is 1.5sec~2.0sec, the excess pore water pressure will begin to increase, the effective stress will gradually decreases, and maybe producing liquefaction. The phenomenon will be obviously under the continuous earthquake action, and predicting soil layer entered liquefaction pattern. There is no obvious phenomenon when groundwater table is deeper than earthquake action.