期刊论文

中文

工业建筑

1000-8993

2011

41

2

45-48,56

10.13204/j.gyjz2011.02.012

2009G008-B:铁道部科技研究开发计划重点项目 2010G018F-3:铁道部科技研究开发计划重点项目

本校为其他机构

在深厚软土地区采用锤击法进行预应力管桩施工,由于土体受到剧烈扰动及软土较差的渗透性,会在桩周软土中产生很高的超静孔隙水压力.通过对现场实测超静孔隙水压力资料的分析和整理,探讨增强型离心桩施工产生的超静孔隙水压力在径向及深度上的分布规律,研究单桩施工不同时刻超静孔隙水压力变化规律.分析结果表明:单桩的沉桩显著影响范围为17.5倍桩径,超静孔隙压力的峰值并不一定出现在末节管桩施工结束后,另外,增强型离心桩单桩施工产生的超静孔隙水压力比普通的预应力管桩产生的超静孔隙水压力消散得快,在施工结束4h后,可以消散70%~80%

Prestressed concrete pipes construction by hammer can produce high excess pore water pressure in deep soft soils because of violent disturbance and poor permeability of soft soil.Through analyzing the data of excess pore pressure in sites,it was analysed excess pore pressure’s distribution distance against the pile and along depth,and was also studied excessive pore water pressure change in different time of single pile construction.The analysis results show that the notable influencing range of single pile construction is about 17.5 times of ...