straight―line joint failure

Both continuous-jointed segmental lining and stagger-jointed segmental lining are used in shield driven tunnels.

通缝、错缝管片在国内盾构隧道施工中均有运用,关于两种衬砌形式孰优孰劣的争论一直存在。

After analyzing the weldability of galvanized steel plate with seam welding,the application of general seam welding machine instead of special purpose one in welding of galvanized oil - tank is studied, the measure of preventing electrode from adhesion of Zn and Cu- Zn alloy is put forward.

分析了镀Zn钢板缝焊的焊接性,进而研究了使用普通缝焊机替代专用设备焊接镀Zn油箱的新工艺,提出了避免滚轮电极粘附Zn及Cu-Zn合金对焊接不良影响的措施,并在生产实践中得到了应用,取得了良好的经济效益。