[] Compression sealing bridge expansion joints advantages:? Telescoping portion without providing a means for supporting the load between the deck and without fixed settings, simple structure. ? Driving comfort. ? Use the rubber synthetic material, lightweight, tough. ? May, after the project is completed the installation, construction easier. ? Hotfix only 10 to 20 hours bridge expansion, closed to traffic in time can be shortened. [Bridge expansion joints] Disadvantages:? Expensive. ? Many kinds of products, between the poor quality of gqf-f40 bridge stretching devices, easy to select appropriate varieties, poor cement at the construction when shedding. [] Bridge expansion joints Maurer MAURER sewn seam body has the following two items:? Two parallel rails, anchor (Anchored) to its concrete bridge deck on both sides of the rail with angle instead of depending on the circumstances. ? Prefabricated congested strip of synthetic rubber in two parallel steel rails. (A) a single combination Maurer seam (B) multiple combinations Maurer joints bridge expansion joints] [Features: (1) can withstand wheel loads of direct action gqf-e40 bridge stretching devices, with high rigidity and durability, and can effect the load is uniformly dispersed in a vehicle on a steel beam and transmitted to the rational design of the anchoring structure guillotine tendons, and anchor the bridge structure 梁连成 whole, so that the bridge expansion joint device and body together by force [bridge expansion joints ] installation specific requirements: expansion joint devices and deck height control between -2mm-0, the transverse flatness less 3mm / 3m. In practice, it may be insufficient local pavement roughness, targets difficult to achieve the above requirements, then the first to try to meet the flatness along the bridge, and secondly to meet the flatness of the transverse direction, and the uneven places to be arranged in the parking trail, to ensure comfort parking. [] After the completion of the bridge expansion joints positioning, welding positioned immediately reinforced steel rings in the welded portion to cut off the telescopic device registration plate. Note telescopic device rings and the back wall of reinforced construction. Ministry of embedded steel (or round 16 Reinforced) welding using single-pass welding, weld and so on at the same time should meet the regulatory requirements. After [] in place to complete the bridge expansion joints and clean, the field technician after passing inspection, supervising engineer concrete construction permit approved before proceeding to pouring concrete. [Bridge] C50 concrete pouring joints, C50 for concrete stones, sand, water, cement and additives etc. Mix strict implementation of construction. Concrete mechanical stirring, to ensure uniformity of concrete. Because slotted shallow notch, the use of plug-in vibrators Plate vibrators peace with the construction, pay attention to the construction of the plug-in vibrators insertion point spacing and flat vibrators drag speed and lap in construction ensure vibration compacting concrete. Installation seam ends should adopt the steel template to ensure end clearance straight. Before pouring the concrete, the gap in the expansion joints, application of plastic foam desert or equivalent gap filling, pouring concrete to prevent the gap closed, the impact stretching.