梁场强夯加固试验与数值模拟研究  

Experimental and test research for dynamic compaction in girder plant

作　　者：李振周[1] 聂志红[2] 

机构地区：[1]中铁一局集团有限公司,陕西西安710054 [2]中南大学土木建筑学院,湖南长沙410075

出　　处：《铁道科学与工程学报》2008年第5期57-60,共4页Journal of Railway Science and Engineering

基　　金：铁道部科技研究开发计划项目(2005K002-A-1)

摘　　要：结合某客运专线梁场强夯加固工程,根据强夯的动附加应力理论公式,分析了该梁场在2种夯击能量下以不同扩散角度进行扩散时的动附加应力的分布规律;利用数值模拟的方法,结合该梁场的地质条件,分析了该梁场在夯击作用下,夯点中心竖向位移随深度方向的衰减规律以及土体竖向位移随水平距离的变化规律。在对理论计算和数值模拟结果的综合分析基础上,结合强夯后检测结果,提出了强夯加固设计参数。强夯后地基承载力和夯击试验以及压缩模量计算结果表明,本次强夯加固效果显著。Based on the construction of the expressway of beam fabrication field, according to the theory of dynamic additional stress, the diffusion rules along the depth with different tamp energy and diffusion angle were given. Based on the numerical analysis method and geological conditions in beam fabrication field, the rules of change curves of vertical displacement with the depth and vertical displacement in the horizon distance were given. The design of reinforcement method was provided for construction. The bearing capacity of foundation and tamp test and calculation of compression modulus show that the reinforcement effect is remarkable.

关 键 词：强夯 有效加固深度 梁场 夯沉量 

分 类 号：TU311[建筑科学—结构工程]