摘要
利用有限差分软件FLAC3D,开展了斜坡桩基上拔极限承载力研究。分析了斜坡桩基上拔极限承载力的变化规律及其影响因素;并与平地桩基进行对比。分析了斜坡的存在对承载力的影响,给出了斜坡影响度的概念。研究表明:影响度大小呈现一定规律:随临坡距的增加呈现减小趋势;随坡度的增大呈现增大趋势,随桩长的增大呈现先增大后减小的趋势。实际工况中可以通过增大桩长、增大临坡距、减小坡度来提高斜坡上桩基的上拔承载力。当临坡距大于2倍桩径或边坡坡度小于1∶1.5时,再通过增大临坡距或减小坡度来提高斜坡桩基的上拔承载力效果并不显著。
By using the finite-difference software FLAC3D,the uplift ultimate bearing capacity of oblique slope pile is studied on.And its variation and influence factors are also analyzed.Then it with the ground is compared pile and analyzed the influence of slope on the bearing capacity.At last the degree of influence is defined about slopes.Research shows that the degree of influence presents certain laws： it presents the trend of decrease with increase of the distance to the slope;it presents the trend of increase with increase of the slope ratio;it increases firstly and then decreases with increase of the length of pile.The uplift ultimate bearing capacity of oblique slope pile by increasing the length of pile can be improved,the distance to the slope or reducing the slope ratio in the actual working conditions.If the distance to the slope is two times more than the pile diameter or the slope ratio is less than 1∶1.5,the effect is not obvious through increasing the distance to the slope or reducing the slope ratio.
出处
《科学技术与工程》
北大核心
2013年第18期5260-5264,共5页
Science Technology and Engineering
基金
国家自然科学基金项目(51079142)
湖北省电力勘测设计院科技项目资助
关键词
斜坡桩基
上拔承载力
数值模拟
FALC3D
oblique slope pile uplift bearing capacity numerical simulation FALC3D
