横向内置加劲型中埋式橡胶止水带研制

Research and Development of the Embedded Rubber Waterstops Reinforced with Horizontally Built-in Steel Plates

铁路隧道衬砌施工缝质量问题十分突出,主要表现为中埋式橡胶止水带在混凝土浇筑过程中发生移位、扭曲、折皱等变形,使施工缝处衬砌混凝土形成薄片状或薄块状,存在掉块风险,危及行车安全。若将薄片或薄块状混凝土全部剔除,又会影响隧道的外观质量。基于此,为解决铁路隧道衬砌施工缝质量问题,研制了横向内置加劲型中埋式橡胶止水带,在不改变橡胶材料性能的基础上,通过工厂化生产将钢板直接置入橡胶止水带中,从而将复杂的安装工艺和现场管理问题从根本上予以解决。通过现场试验表明,新产品具有"使用方便,安装质量好、安装效率高、综合成本低"的特点,极具推广应用价值。

The prominent quality problems of construction joints of railway tunnel linings are mainly represented by displacement,twisting,cockling of the embedded rubber waterstops during concrete pouring and this results in the risks of lamelliform concrete at construction joints and chip off-falling,endangering railway traffic safety.However the visual effect of tunnel linings is affected if the lamellated concrete is removed.In view of this,the embedded rubber waterstop reinforced with horizontally built-in steel plate is developed,and the problems concerning complex site installation and management are radically solved by the industrialized steel plate embedded in the rubber waterstop,without changing the material performances of rubber.The field test shows this new waterstop is worth being promoted and applied attributed to the characteristics of easy use,good installation quality,high efficiency and low cost.