摘要
科学合理地确定各种桩基的设计承载力值一直是工程和学术界研究的重点。通过调整安全系数的取值,以获得安全有效的承载力设计值,将大大简化扩底桩的设计工作。通过对某工程2根"扩底桩"基础试验资料的分析,研究"扩底桩"受力过程中端阻力、侧摩阻力的发挥情况。研究表明:"扩底桩"桩长越大,侧摩阻力占总承载力比例越大,端阻力占总承载力比例越小。结合合肥地区95根"扩底桩"试验数据的分析统计结果,建议在合肥地区设计"扩底桩"基础时,可根据桩长的不同取不同的安全系数,并给出相应的安全系数设计建议值。
How to scientifically and rationally determine the bearing capacity design value of pile foundations has been the key point in engineering and academic circles. Assuming that by adjusting the safety factor values to obtain the safe and effective bearing capacity design value,the design work of belled piles would be greatly simplified. In this paper,based on the static loading test data of two belled piles of a certain engineering case,the developments of the pile tip resistance and the lateral friction resistance of belled piles in the loading process were researched.Research showed that the longer the length of belled pile,the larger the proportion of lateral friction resistance accounted for total bearing capacity,and the smaller the proportion of the tip resistance accounted for total bearing capacity. According to the statistics research results of test data of 95 belled piles in Hefei area,it was suggested that safety factor value could be determined based on the different pile length in designing belled piles in Hefei area,and the suggested safety factor values were given.
出处
《工业建筑》
CSCD
北大核心
2016年第7期134-139,共6页
Industrial Construction
基金
国家自然科学基金项目(51408283)
云南省人才培养项目(KKSY201306106)
关键词
大直径扩底桩
竖向承载力
端阻力
侧摩阻力
安全系数
large-diameter belled pile
vertical bearing capacity
tip resistance
lateral friction resistance
safety factor
