摘要
通过一系列的室内模型试验研究了砂土中吸力式沉箱基础的抗拔承载特性,着重分析了沉箱的长径比、荷载作用角度和荷载作用点位置的影响。试验中考虑了3个长径比,5个荷载作用角度和5个荷载作用点位置。试验结果表明,不同工况条件下吸力式沉箱基础在被拔出前所表现出来的荷载-位移特性各不相同。增大沉箱的长径比,可以显著提高吸力式沉箱基础的抗拔能力,但长径比的改变不影响吸力式沉箱基础的位移特征。荷载作用方向越接近于水平方向,吸力式沉箱基础的抗拔能力越强。当吸力式沉箱基础承受竖向上拔荷载作用时,荷载作用点位置的变化对其承载力的影响可以忽略;除荷载作用角度为90°外,荷载作用于沉箱高度的2/3和3/4处时,基础的抗拔能力最强。
A series of model tests are carded out to investigate the pull-out behavior of a suction caisson foundation in sand, and the effort is focused on the effect of aspect ratio, loading inclination angle and load attachment point. Three different aspect ratios, five different loading inclination angles and five different load attachment points are considered in the model tests. The test results show that the characteristics of load-displacement of the suction caisson foundation before pull-out are different in each case. The pull-out capacity can be improved significantly by increasing the aspect ratio. However, changing the aspect ratio does not affect the deformation characteristics of the suction caisson. The more nearly horizontal the loading direction, the greater the pull-out capacity of the suction caisson foundation. The influence of the loading position on the pull-out capacity of the suction caisson foundation can be ignored while the loading inclination angle equals 90° , otherwise the load should be attached on the suction caisson height of 2/3 and 3/4 to obtain greater pull-out capacity.
出处
《岩土工程学报》
EI
CAS
CSCD
北大核心
2013年第5期902-907,共6页
Chinese Journal of Geotechnical Engineering
基金
国家自然科学基金项目(50909020
51078082)
海岸灾害及防护教育部重点实验室开放研究基金资助项目
关键词
吸力式沉箱基础
抗拔
砂土
承载力
模型试验
suction caisson foundation
anti-uplift
sand
bearing capacity
model test
