斜交地道桥下穿高速公路顶进过程中的偏位分析  

Deviation Analysis of Skew Underpass Bridge in Jacking Process of Underpass Expressway

作　　者：巢万里 黄勇军 潘世强 金宇轩 CHAO Wanli;HUANG Yongjun;PAN Shiqiang;JIN Yuxuan(Hunan Communications Research Institute Co.,Ltd.,Changsha,Hunan 410015,China;Hunan Provincial Key Laboratory of Traffic Construction Engineering,Changsha,Hunan 410015,China;HNCEG Communications Construction Co.,Ltd.,Changsha,Hunan 410005,China)

机构地区：[1]湖南省交通科学研究院有限公司,湖南长沙410015 [2]交通建设工程湖南省重点实验室,湖南长沙410015 [3]湖南建工交通建设有限公司,湖南长沙410005

出　　处：《公路工程》2022年第3期57-62,共6页Highway Engineering

基　　金：湖南交通科技项目(201811);湖南省交通科技项目(201432)。

摘　　要：依托平益高速平江南互通E匝道下穿平汝高速地道桥顶推工程,结合理论分析与现场监控,对斜交地道桥顶进全过程的偏位问题进行了研究,推导了斜交地道桥顶进全过程平面初始偏转力矩的力学表达式,明确了地道桥预制角度、首节长度、斜交角度和净宽等设计参数对地道桥偏位的影响,并提出相应的工程对策。最后,通过对比现场监测所反映的偏位趋势,验证了理论公式的正确性,理论公式反映地道桥偏位趋势与现场监测结果基本一致。该理论公式可为类似项目的纠偏控制提供理论指导。Based on the jacking project of Pingjiang South interchange E ramp of Pingyi Expressway passing through pingru Expressway Underpass Bridge,combined with Initial analysis and field monitoring,this paper studies the deflection of skew underpass bridge in the whole jacking process,deduces the mechanical expression of plane initial deflection moment in the whole jacking process of skew underpass bridge,and defines the prefabrication angle,first section length,the influence of design parameters such as skew angle and clear width on the deviation of underpass bridge,and the corresponding engineering countermeasures are put forward.Finally,by comparing the deviation trend reflected by the field monitoring,the correctness of the Initial formula is verified.The deviation trend reflected by the Initial formula is basically consistent with the field monitoring results.The Initial formula can provide Initial guidance for deviation correction control of similar projects.

关 键 词：斜交地道桥 顶推施工 初始偏转力矩 现场监测 平面姿态 纠偏 

分 类 号：U45[建筑科学—桥梁与隧道工程]