| Urban spatial structure of urban traffic facilities can not realize without support and guidance of urban traffic facilities. Construction of expressway of Tianjin West Outer Ring can implement Tianjin's urban spatial strategy of "Dual-city Dual-port", support the layout of "One-core Dual-port Nine-zone", strengthen the connection between functional zones of new city and realize the functional complementation among functional zones. And the proposed cross-Haihe grand bridge project of West Outer Ring expressway, whose construction is vitally important for realization of cut-through of West Outer Ring expressway.However, construction of this project will have great influence on waterway of Haihe; the clearance dimensions and establishment of navigational holes will influence the navigable capability and safety of navigation and the control of navigable clearance dimensions of the bridge will bring far-reaching effect on the development of the channel and navigation of ships. Aiming at ensuring that traffic is unblocked during the construction and service of the bridge, improving navigable circumstances of bridge-zone and waters thereof, ensuring navigational safety of ships at bridge-zone, this thesis conducts an argumentation of rationality on the design alternative of the project in respect of safety of navigation of ships, researches the effect of proposed project of bridge on the navigable circumstances in the adjacent waters, safeguards during construction and service period of the project and offers some suggestions, according to the requirements of "PRC MSA's management rules on evaluation of navigation safety, HTH(2007)No.629", mainly through on-the-spot investigation, collection of meteorological, hydrological and navigable conditions, using method of expert analysis. |
