Abstract：
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 structure 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 of the Gongbei Tunnel of HongKong-Zhuhai-Macau Bridge. The results show that the pipe joint with two olecranon-shaped rubber sealing rings is capable of withstanding 0.3 MPa water pressure and meeting the in-situ construction sealing requirements; the maximum contact pressure between the rubber ring and the joint socket under pressure of 0.1~1.0 MPa is greater than the applied water pressure, which means the rubber ring will be not invalidated.
2015, Vol. 52 