预埋件施工技术及锌镍渗层防腐技术在地铁工程中的应用探讨——延长工程寿命降低维护运营成本

Application of Embedded Part Installing Technology and Zinc-nickel Coating Corrosion-proof Technology in Metro Works: Extending Works' Service Life and Reducing Maintenance and Operation Cost

在地铁隧道管线及设备安装过程中,目前大多采用人工钻孔,对环境及施工人员的健康造成严重影响的同时,还会造成结构破坏,降低工程寿命,增加运营维护成本。运营地铁隧道还存在钢构件及设备腐蚀严重的问题。为此,对地铁隧道电缆、管线、设备安装及钢构件、设备腐蚀的现状进行了调研,指出存在的问题。说明人工钻孔所带来的危害,提出预埋件技术这一解决方案,进行了相关实验;针对扣件设备腐蚀严重的问题,提出了锌镍渗层防腐技术。认为应:1)全面推广预埋件技术,可提高设备安装效率,改善安装环境,降低对结构的损伤,延长工程寿命,使运营维护简便、易行;2)全面推广锌镍渗层防腐技术,预防设备及钢构件锈蚀,降低营运维护成本。

At present, boreholes are drilled in order to install utility lines and equipment in Metro works. Borehole drill ing not only causes adverse influence on the environment and the labors＇ health, but also reduces the works＇ service life and increases the maintenance and operation cost. Furthermore, the steel structures and equipment in operating Metro tunnels are seriously corroded. In the paper, the stateofart of the installing of the utility lines and equipment in Metro tunnels and that of the corrosion of the steel structures and equipment are investigated and problems to be solved are presented. The disadvantages of installing utility lines and equipment by means of borehole drilling technology are pres ented, the solution of adopting embedded part installing technology is proposed, and tests are made. Zincnickel coating corrosionproof technology is proposed to solve the corrosion problem. Conclusions drawn are as follows ： 1 ） The full pro motion of the embedded part installing technology can improve the equipment installing efficiency, improve the working environment, reduce the damages to the tunnel structure, extend the works＇ service life and facilitate the operation and maintenance of the works ; 2） The full promotion of the zincnickel coating corrosionproof technology can avoid the cor rosion of the equipment and steel structures and can reduce the operation and maintenance cost.