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.
作者
张伟
张凯
马建林
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)
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)
关键词
岩溶地区
灌注桩
后注浆
承载特性
数值模拟
karst regions
cast-in-place pile
post grouting
bearing characteristics
numerical simulation
