摘要
运用FLAC模型模拟了承台荷载作用下的PHC管桩群桩,得出了荷载-沉降曲线,并与现场所得曲线进行对比分析,结果证明二者吻合较好。然后采用该模型分析了在桩数不变的情况下,桩长L、桩距Sa等对群桩效应及其系数η的影响。结果表明:桩基极限承载力随L和Sa的增长而逐渐增大,但其幅度逐渐减小;η随L的增长而减小,而幅度逐渐降低;η与Sa近似一种线性增长的关系,但幅度随Sa的增大而逐步减缓。
PHC pipe pile group under bearing platform load is simulated with FLAC model and load-settlement curve is educed.Compared to the curve obtained on site,it is found that the two has goodness of fit.The influence of pile length L and pile distance Sa is analyzed on pile group effect and its coefficient η under unchanging pile quantity using this model.The result shows that pile foundation ultimate bearing capacity gradually increases with the increase of L and Sa,with amplitude gradually reduced.η decreases with the increase of L,with amplitude gradually reduced.The relationship between η and Sa is similar to linear increase,but the amplitude gradually reduces with the increase of Sa.
出处
《路基工程》
2010年第4期189-191,共3页
Subgrade Engineering
关键词
FLAC
PHC管桩
群桩效应
群桩效应系数
FLAC
PHC pipe pile
efficiency of pipe group
pile group effect coefficient
