高水压条件下钢顶管管节密封性试验及数值模拟研究  

Sealing Test and Numerical Simulation for Steel Jacking Pipe Joint under High Water Pressure

作　　者：高海东[1] 赵涛[1] 马胜利[1] 范旭阳[1] 郭彦兵[1] 

机构地区：[1]中铁十八局集团有限公司,天津300222

出　　处：《现代隧道技术》2015年第2期148-154,共7页Modern Tunnelling Technology

摘　　要：钢顶管是大部分超大型顶管管幕施工的基础和关键技术。在复杂地层条件和高地下水压力环境下,钢顶管管节密封结构的密封性能至关重要。文章以港珠澳大桥拱北隧道曲线顶管管幕工程为背景,针对钢顶管管节密封性能进行了室内模型试验和ABAQUS有限元模拟。结果表明,采用两道鹰嘴形橡胶密封圈的管节接头可以满足现场抵抗0.3 MPa水压的施工密封要求;在0.1~1.0 MPa水压力作用下橡胶圈与插口的最大接触压力均大于施加的水压力,橡胶密封圈不会失效。Steel pipe jacking is the foundation and key technology of most large pipe-roofing construction. And yet facing with the complex formation and high groundwater pressure, sealing property of leakproof structm-e of jacking pipe joint is of great importance. In this paper, laboratory model experiment and ABAQUS finite element modeling are carried out regarding the sealing property of steel jacking pipe joints in the curved pipe-roof section nouIsha ongbei Tunnel of HongKong-Zhuhai-Macao Bridge. The results show that the pipe joint with two olecra- ped rubber sealing rings is capable of withstanding 0.3 MPa water pressure and meeting the in-situ con- struction sealing requirements; the maximum contact pressure of 0.1-1.0 MPa is greater than the applied validated. pressure between the rubber ring and the joint socket under water pressure, which means the rubber ring will be not in-

关 键 词：顶管 高地下水压力 密封性试验 鹰嘴橡胶圈 

分 类 号：U455.47[建筑科学—桥梁与隧道工程]