高速铁路岩溶地区桩基后压浆仿真分析  

Simulation Analysis of Post Grouting for Pile Foundation in Karst Regions along High Speed Railway

作　　者：张伟 张凯[2] 马建林[2] 白丁伟 ZHANG Wei;ZHANG Kai;MA Jianlin;BAI Dingwei(The Communications Construction Engineering Company,CCCC Third Harbor Consultants Co.,Ltd., Shanghai 200000,China;School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China)

机构地区：[1]中交第三航务工程局有限公司交建工程分公司,上海200000 [2]西南交通大学土木工程学院,成都610031

出　　处：《路基工程》2018年第6期94-99,共6页Subgrade Engineering

基　　金：国家重点研发计划(2016YFC0802203-1)

摘　　要：为分析后压浆技术对高速铁路岩溶地区桥梁桩基承载特性的影响,运用有限元软件PLAXIS模拟分析了顺义特大桥#190墩钻孔灌注试桩注浆前后的承载性能变化。结果表明:(1)后压浆能在岩溶地区桥梁桩基发挥重要的作用,提高桩基承载力约85%,减小沉降约58%;(2)数值模拟结果与现场试验结果吻合度较好,能够很好反映现场实际的工程状况。In order to analyze the influence of post-grouting technique on bearing characteristics of bridge pile foundation in karst regions along high-speed railway,the finite element software PLAXIS was used to simulate and analyze,for the cast-in-place bored piles for the #190 pier of Shunyi Grand Bridge,how the bearing behavior thereof changes before and after grouting.The result shows that,①the post-grouting can play an important role in bridge pile foundation in karst regions,and significantly improve the pile bearing capacity by about 85% and reduce the settlement by about 58%;②the result of numerical simulation is consistent with that of the field test,and may reflect the actual conditions of works on the site.

关 键 词：岩溶地区 灌注桩 后注浆 承载特性 数值模拟 

分 类 号：TU473.1[建筑科学—结构工程]