摘要
在对浙江东部沿海地区某大型高速公路工程3900多根采用桩后压浆工艺的桥梁钻孔灌注桩进行分类的基础上,采用超声波法、反射波法、堆载法和自平衡法等检测方法,并结合现行的检测规范,对基桩进行了完整性及承载力检测和评价,并用一定数量的钻芯验证了检测结果,同时对比分析了直管法和U管法压浆工艺基桩的施工质量,剖析了桥梁钻孔灌注桩后压浆工艺造成桩身缺陷及承载力不足等现象的成因,还比较了不同检测方法之间的优劣性。研究为钻孔灌注桩后压浆工艺的推广提供了技术支持,也为后压浆工艺桥梁基桩施工质量的检测技术选择提供了建议。
On the basis of classification of nearly 3900 bridge bored piles with a poet-grouting in a large expressway project in the eastern coastal area of Zhejiang province,ultrasonic wave method,reflection wave method,stacking method and self-balancing method are used combined with test specification for foundation piles to teste and evaluate the integrity and bearing capacity of foundation pile.The test results are verified by a certain number of drill cores.At the same time,the construction quality of grouting pile with straight pipe method and U-pipe method is compared and analyzed,the causes of pile body defect and bearing capacity insufficiency caused by grouting technology after grouting of bridge bored pile are analyzed,and the advantages and disadvantages of different test methods are were also compared.The technical support was provided for the popularization of the grouting process after bored piles.It could also provide reliable suggestions to test the quality of bridge foundation pile using post-grouting technology.
作者
李佳
肖衡林
LI Jia;XIAO Henglin(Hubei University of Technology ,Hubei 430068,China;Zhejiang Traffic Detection Co.,Ltd.,Hangzhou 311215,China)
出处
《四川理工学院学报（自然科学版）》
CAS
2018年第6期53-59,67,共8页
Journal of Sichuan University of Science & Engineering(Natural Science Edition)
关键词
基桩
桩后压浆工艺
完整性
承载力
超声波法
堆载法
foundation piles
post-grouting technology
integrity
bearing capacity
ultrasonic method
stacking method
