土石混填路堤强夯加固范围研究  

Study of Reinforcement Range of Dynamic Compaction in Soil-stone Material Embankment

作　　者：赵炼恒[1] 李亮[1] 何长明 邹金锋[1] 曾中林[3] 

机构地区：[1]中南大学土木建筑学院,湖南长沙410075 [2]广东能达高等级公路维护有限公司,广东广州510030 [3]中国中铁二院工程集团有限责任公司重庆设计研究院,重庆400015

出　　处：《中国公路学报》2008年第1期12-18,共7页China Journal of Highway and Transport

基　　金：国家自然科学基金项目(50408020);湖南省科学技术厅科技计划项目(04SK2009)

摘　　要：基于常(德)吉(首)高速公路湘西段土石混填路堤强夯加固的大型现场动应力测试的试验成果,通过分析影响强夯加固范围的锤重和落距(夯击能)、夯锤面积、夯击次数、土体类型、干重度、含水量等各种因素,采用量纲分析结合选取修正系数的方法推导出了土石混填路堤强夯加固深度的计算公式;并根据泊松比的定义,建立了强夯加固范围的计算公式。最后通过与已有研究资料和工程实测有效加固深度的对比验算,表明该公式的计算结果与实测结果较吻合。Based on results and analysis of in-situ dynamic stress test that make use of the dynamic compaction technology to embankment of Xiangxi section in Changde-Jishou Freeway which was filled by soil-rock foundation packing material, the formula that determined the effective reinforcement depth was deduced by using dimensional analysis and choosing correction factors after several influencing factors of the effective reinforcement range including the weight of hammer, the highness of hammer, the section area of hammer, the dry density of filler, the type of filler and the moisture content of filler were comprehensively studied. The calculation formula of reinforcement range of dynamic compaction in soil-stone embankment was established based on the definition of Poisson ratio. It is indicated by the results of contrastive analysis that calculation results are close to actual measurement results.

关 键 词：道路工程 土石混填路堤 现场试验 加固范围 量纲分析 强夯 

分 类 号：U416.1[交通运输工程—道路与铁道工程]