强夯加固饱和软土地基的数值模拟方法及算例  

Numerical Simulation Method and Calculation Example of Saturated Soft Soil Foundation Reinforced by Dynamic Compaction

作　　者：左大伟 Zuo Dawei(Tianjin Jingang Construction Co.,Ltd.,Tianjin 300452,China)

机构地区：[1]天津津港建设有限公司,天津300456

出　　处：《港工技术》2022年第4期106-111,共6页Port Engineering Technology

摘　　要：本文通过理论分析、数值模型、与工程实例计算相结合的方法,对天津地区强夯加固饱和软土地基进行了动力耦合数值模拟分析。研究主要考虑地基土体在强夯条件下孔压的分布范围及孔压消散曲线。本文通过数值模拟,研究了不同夯锤落距、土体渗透性及土体弹性模量条件下,受强夯影响范围内土体(沿横向、纵向)最大正孔压和最大负孔压的分布规律及消散机理。并结合天津港工程实例,分析了强夯实施过程中,分层土体对正、负孔压的产生及消散规律的影响。Dynamic coupling numerical simulation is carried out for the saturated soft soil foundation reinforced by dynamic compaction in Tianjin through the combination of theoretical analysis,numerical model and engineering example calculation.The study mainly covers the distribution range and dissipation curve of pore water pressure in foundation soil under dynamic compaction.Numerical simulation is built to deduce the distribution law and dissipation mechanism of the max.positive/negative pore water pressures(in horizontal and vertical directions)in the soil affected by dynamic compaction under the conditions of different hammer dropping distances,soil permeability and elastic modulus.A project in Tianjin port is selected to analyze the influence of layered soil on the generation and dissipation laws of positive/negative pore water pressure during dynamic compaction.

关 键 词：强夯 饱和软土 数值模拟方法 孔隙水压力 落距 

分 类 号：TU471.8[建筑科学—结构工程]