1。 总结
混合替换系统（DBHRS）膨胀节与轨道式膨胀节（DBR）具有相似的功能和结构，但它可以解决DBR面临的维护和更换挑战。它是一种创新技术产品，只需更换和维护该技术消除了钢筋放置、混凝土拆除和浇筑以及混凝土养护等施工过程。与传统产品相比，可以缩短工期，节省成本，延长桥梁的使用寿命，提高稳定性和耐久性。
2。 产品特点
The waterproof rubber seal between rail beams is put in the rail groove processed in the same way as a rubber seal, playing its waterproof role perfectly. So it secures the durability of the lower structures of bridge. The spacing system installed on the bottom of rail beams equally distributes the whole expansion behavior. For the semi-permanent use of structural steel parts, elastic parts with exnt attenuation are applied. It is possible to make continuous use only by replacing parts. Rail Type Expansion Joint uses only the parts that passed strict tests. So, it is possible to endure various environmental and sical conditions during the endurance life of bridge. In addition, the expansion joint is applicable regardless of a bridge type. In short, it is usable without the limitation of expansion length (at least 120 mm).The gap between rail beams is max. 80mm according to field conditions. The of rail beams and the of waterproof rubber seals depend on expansion length.During the initial installation, an open support box is installed, allowing for efficient maintenance by only replacing the main body in the event of expansion joint damage.Partial lane-by-lane replacement is possible, enabling efficient maintenance management.The replacement time is significantly reduced compared to former replacement methods.There is no need to dismantle the concrete, ensuring the durability of the structure.Due to the minimized generation of noise, dust, and other complaints, it can be applied in all areas, including urban centers.Expansion & contraction and rotation in all directions (longitudinal, transversal, and vertical)Full waterproof functionCustomized designInstallation in all types of bridgesElastic parts with exnt load attenuationApproved high-quality materials
3。 防水
为了实现伸缩缝的完美防水功能，在与橡胶密封条相同的方式加工的导轨槽内放置防水橡胶密封条。因此，完全防止了漏水。菱形防水橡胶密封条组装维修方便，具有防止膨胀缝底部漏水的功能。
4、防腐
对于结构钢的表面处理，根据KS D 8308标准，采用热浸镀锌来防止盐应力和腐蚀。与涂层相比，这种处理保证了外部的耐腐蚀性和附着力。厚度为85μm，保证约45年的使用寿命。
