港珠澳大桥珠海连接线拱北隧道复杂曲线管幕顶管施工轨迹控制技术

发布时间：2018-01-05 02:32

本文关键词：港珠澳大桥珠海连接线拱北隧道复杂曲线管幕顶管施工轨迹控制技术　出处：《铁道标准设计》2014年09期 　论文类型：期刊论文

【摘要】：管幕工程是港珠澳大桥珠海连接线拱北隧道的重要组成部分,曲线顶管是本工程核心技术之一,其成功与否将直接关系到项目的成败。管幕下穿拱北口岸,埋深4~5 m,平均长度257.92 m,位于半径890 m圆曲线和缓和曲线组成的组合曲线上,精度要求±50 mm,地表沉降要求小于30 mm,管幕所处地层地质条件复杂,周边环境敏感,人流、车流众多,管节轨迹控制难度大,轨迹精度控制是管幕工程难点之一。从顶管机设备选型、管节长度、F形接头设计、测量控制、动态纠偏、始发接收控制、管节轨迹实际偏差等几个方面介绍管幕轨迹控制技术。
[Abstract]:Pipe curtain engineering is an important part of Gongbei Tunnel of Zhuhai connection Line of HongKong-Zhuhai-Macao Bridge. Curve jacking is one of the core technology of the project. Its success or failure will directly affect the success or failure of the project. The buried depth is 4 ~ 5 m and the average length is 257.92 m. It is located on the combined curve of radius 890 m circle curve and transition curve, and the precision is 卤50 mm. The surface subsidence requirement is less than 30 mm, the geological condition of the pipe curtain is complex, the surrounding environment is sensitive, the people flow, the vehicle flow is numerous, and the trajectory control of the pipe joint is difficult. Trajectory precision control is one of the difficulties in pipe curtain engineering. It includes the selection of pipe-jacking machine equipment, the design of F-shaped joints of pipe segment length, the measurement control, the dynamic correction of deviation, and the initial receiving control. This paper introduces the trajectory control technology of tube screen in several aspects, such as the actual deviation of pipe track.
【作者单位】：中铁十八局集团有限公司;
【分类号】：U455.4
【正文快照】： 1工程概况管幕工程是港珠澳大桥珠海连接线拱北隧道的重要组成部分,曲线顶管是本工程核心技术之一,其成功与否将直接关系到本项目的成败,设计方案几经修改完善,最终确定管幕工程由36根钢管组成,另加1根0号试验管,共37根,平均长度257.92 m,其中壁厚20mm管节18根,壁厚24 mm管节1

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