预制桩施工过程中超孔隙水压力变化分析  

Analysis of the change of excess pore water pressure during the construction of precast piles

作　　者：付鑫国 叶宏林 张笑 许铭 Fu Xinguo;Ye Honglin;Zhang Xiao;Xu Ming(Suzhou Fangzheng Engineering Technology Development Testing Co.,Ltd.,Suzhou Jiangsu 215152,China)

机构地区：[1]苏州方正工程技术开发检测有限公司,江苏苏州215152

出　　处：《山西建筑》2024年第14期103-106,共4页Shanxi Architecture

摘　　要：为厘清沉桩过程中因挤土效应造成的超孔隙水压力变化情况,通过对施工过程中超孔隙水压力的监测数据进行分析。研究发现:距离沉桩位置越近,超孔隙水压力变化越大,消散越慢;随地层深度越深,超孔隙水压力变化越大,消散越慢;联系地层变化发现,位于砂层的超孔隙水压力消散的速度较其他土层更快。并针对以上规律,提出合适的超孔隙水压力的控制措施和监测方式,为指导实践、保障施工安全提供相应的理论依据。In order to clarify the change of excess pore water pressure caused by soil squeezing effect in the process of pile sinking,the monitoring data of excess pore water pressure during the construction process was analyzed.The results show that the closer to the pile sinking position,the greater the change of excess pore water pressure and the slower the dissipation.With the deeper the formation depth,the excess pore water pressure changes more vigorously and dissipates more slowly.In connection with the stratigraphic changes,it was found that the excess pore water pressure in the sand layer dissipated faster than that in other soil layers.In view of the above rules,appropriate control measures and monitoring methods of excess pore water pressure are proposed,which provide corresponding theoretical basis for guiding practice and ensuring construction safety.

关 键 词：静压桩 超孔隙水压力 挤土效应 控制措施 

分 类 号：TU753[建筑科学—建筑技术科学]