饱和盐渍土地基处理孔隙水压力实测分析

Test analysis on pore water pressure in ground treatment to saturated saline soil

通过对青海察尔汗盐湖地区的饱和盐渍土天然地层强夯和碎石排水桩加强夯进行孔隙水压力测试,重点探讨了碎石排水桩加强夯处理盐渍土地基孔隙水压力变化特性、强夯时孔隙水压力峰值与土层表面接触应力峰值的关系、不同夯击遍数下的孔隙水压力、排水桩的作用以及强夯夯击间歇时间等问题,对碎石排水桩加强夯处理饱和盐渍土地基技术的研究与工程实践有一定的指导意义。

Pore water pressure(PWP) is measured when dynamic consolidation with drain pile(DPD) are performed to improve ground with saturated saline soil in Qinghai Chaerhan salt lake area.The results are used to analyze the characteristics of PWP variation in DPD,the relationship between summits of PWP and contact dynamic stress in dynamic consolidation,the effect of compact times on PWP,the function of drainage stone columns and the intermission between compacts.It has certain instructive significance for research and engineering practice on saturated saline ground in the future.