文档介绍：桥梁建设 2015 年第 45 卷第 1 期(总第 230 期)Bridge Construction ,Vol .45 ,No .1 ,2015 (Totally No .230)文章编号:1003 - 4722(2015)01 - 0097 - 06某桥桥墩桩基偏位纠偏方案设计与实施侍刚1 ,2,伍贤智1 ,2(1 .中铁大桥局集团桥科院有限公司,湖北武汉 430034 ;2 .桥梁结构安全与健康湖北省重点实验室,湖北武汉 430034)摘要:某四跨 25 m 预应力空心板简支梁桥桥墩桩基严重偏位,桩顶最大偏移量为 19 .1 cm 。经分析,该桥桥墩桩基偏位的原因为在堆土不平均土压力作用下,淤泥层发生显著的侧向挤出现象,从而产生巨大的侧向推挤作用,使右幅桥墩产生偏移。结合现场实际情况,采取设置应力释放孔、高压旋喷桩,新增桩基承台及顶推纠偏等措施进行纠偏整治,使桥墩偏位回归允许范围内。采用荷载试验对加固后桥墩的承载能力进行评定,结果表明,桥墩承载能力满足设计要求,所采取的方案有效,纠偏效果良好。关键词:简支梁桥;桥墩偏位;纠偏方案;应力释放孔;高压旋喷桩;荷载试验中图分类号:U443 .22 ;U445 .71 文献标志码:ADesign and Implementation of Deviation RectifyingScheme for Pile Foundations of Piers of a BridgeSHI Gang1 ,2,WU Xian‐zhi1 ,2(1 .Bridge Science Research Institute Ltd .,China Railway Major Bridge Engineering Group ,Wuhan 430034 ,China ;2 .Key Laboratory of Bridge Structure Safety and Health of Hubei Province ,Wuhan 430034 ,China)Abstract :The pile foundations for the piers of a 4 × 25‐m span prestressed concrete simply‐supported hollow slab beam bridge deviated severely and the maximum deviation amount of thepile tops was up to 19 .1 cm .Through the analysis of the deviations of the pile foundations ,itwas considered that the causes of the deviations lay in the following :under the action of the non‐uniform stacked soil pressure ,the problem of significant paction of the silt layers inthe ground occurred ,the problem produced enormous lateral pushing action an