摘要
复合载体夯扩桩的最优桩距的确定对于提高复合载体夯扩桩的技术经济效益有着十分重要的作用。通过半桩模型试验确定了在不同桩距情况下夯扩的相互影响 ,从而把夯扩扰动影响控制在合理范围内 ,并确定最优桩距。同时 ,通过现场取样和室内试验确定了夯扩对夯扩体以下地基的竖向影响范围 ,并用计算下卧层土体的承载力来确定复合载体夯扩桩的最优桩距 ,两种方法得到的最优桩距均接近于 4倍桩径。
The optimal spacing of rammed enlarged composite bearer piles is much more important for improving economical efficiency.The reciprocal influence during ramming and enlarging for different spacings is determined through half\|pile model test,so that minimum spacing is determined for rational range of disturbance aroused by ramming and enlarging.The influence area of ramming and enlarging is determined by in\|site sampling and laboratory test,the optimal spacing of Rammed Enlarged Composite Bearer Piles is calculated in the situation that the bearing capacity of bearing stratum is fully stimulated.The optimal spacing from the two approaches is close to 4 diameters of the piles.
出处
《工业建筑》
CSCD
北大核心
2002年第1期29-31,共3页
Industrial Construction
关键词
复合载体夯扩桩
半桩模型试验
最优桩距
荷载传递
rammed enlarged composite bearer pile\ half\|pile model test\ optimal spacing load transfer
