自平衡试桩法在深层混凝土灌注桩单桩承载力测试中的应用

本文采用自平衡试桩法对北京地铁十号线光华路站深层混凝土灌注桩单桩竖向抗压承载力进行了静载试验,试桩数量为4根,其中有3根试桩桩侧、桩底采用了后压浆技术,并对有无后压浆试桩的承载力性状进行了对比分析,这也是北京地区首次对这类深层混凝土灌注桩单桩竖向抗压承载力进行自平衡试桩法静载试验,本次试验的成功为本地区积累了宝贵的经验,并为今后砂卵石层桩的极限承载力设计提供了参考依据。

Application of Self-balancing Test Pile Method in Determining Single Pile's Bear- ing Capacity of Cast-in-place Bored Piles

In this paper,we have successfully used self-balancing test pile method carried on static load test on single pile vertical compression bearing capacity of deep concrete pile in Guanghua Station on the No.10 Line of Beijing Metro.There are four test piles,three of them using post-grouting technology in pile side and toe,and the behavior of bearing capacity with and without post-grouting trial pile are compared.It is the first time carrying on sef-balanced pile static load test of single pile vertical compre...