路基工程Issue(6)：98-102,5.DOI:10.13379/j.issn.1003-8825.2017.06.21
嵌岩灌注桩抗拔承载特性现场试验研究
Field Testing Study on Uplift Bearing Characteristics of Rock-socketed Cast-in-situ Pile
吴孟松 1马建林 1王滨 2杨柏1
作者信息
- 1. 西南交通大学土木工程学院,成都610031
- 2. 国家电网四川省电力公司,成都610041
- 折叠
摘要
Abstract
According to the vertical uplift static test data of single rock-socketed cast-in-situ pile in the new project of state grid 500 kV double-circuit line from Luping to Fule,the load transfer behavior of rock-socketed cast-in-situ piles and the characteristics of the frictional resistance in rock-socketed section are analyzed.The results show that the pile side ultimate resistance of strong weathered sandstone is 2.4 to 2.6 times of the value provided by Technical Specification for Building Pile Foundation and the pile side resistance of the moderately weathered sandstone is 635 ～ 770 kPa;the interaction between rock-socketed pile shaft and rock stratum should be the combination of friction force,cohesive force and the socketed force.When the test pile reaches the ultimate uplift load,the rock-socketed ratio of pit-depth to pit-diameter that the pile side resistance can effectively and completely play is 3.75.It is not correct that the larger the rock-socketed depth,the more effective to increase the uplift bearing force.关键词
抗拔承载特性/嵌岩灌注桩/现场试验/嵌岩深度/桩侧摩阻力Key words
uplift bearing characteristics/rock-socketed cast-in-situ piles/field test/rock-socketed depth/pile side friction resistance分类
建筑与水利引用本文复制引用
吴孟松,马建林,王滨,杨柏..嵌岩灌注桩抗拔承载特性现场试验研究[J].路基工程,2017,(6):98-102,5.
