预制自排水桩的抗挤土机理分析

Analysis of Anti-Soil Compaction Mechanism by Precast Self-draining Pile

基于抗挤土效应,提出了预制自排水桩的设计思想,采用土体固结理论,研究了预制沉桩过程中桩周土体超孔隙水压力的消散速度,分析了预制自排水桩的沉桩排水效果,并通过工程实例和现场测试进行比较分析和验证。结果表明,预制自排水桩具有较好的排水效果,可以起到消散桩周土超孔隙水压力的效果,从而抑制沉桩挤土效应。

Based on the purpose of the anti - soil compaction effect this paper, proposes the design ideas of preeast self - draining pile, By adopting the theory of soil consolidation, we studied the dissipation rate of excess pore water pressure during the pre - pile sinking and analyzed the pile - sinking draining effect of precast self - draining pile. An engineering example and field test was used to compare analysis and verification. The results showed that, precast self- draining pile had good drainage effect, and could play a role of dissipating excess pore water pressure, thus resist the effect of soil compaction pile.