The maintenance aspect, the sliding surface, rolling surface is not flat, dirty, dust and other foreign matter not timely cleaning, fasteners loose reinforcement is not timely, because waterproof device defect makes the holder or link area water corrosion, accelerated aging processes. Again is due to the piers, abutments uneven subsidence, tilt and horizontal shift of the upper structure, vibration displacement and other superstructure steel truss bearing directly affect the normal use. To be able to secure two-way steel truss bearing ball bearing sliding seismic grid, effectively normal use, it should strengthen the seat of regular inspection and repair and reinforcement work, and dedicated to the steel truss seat for routine maintenance management purposes, very difficult to put into practice the formula, it is usually combined with other conservation work with bridge steel truss seat and pay attention to the site and check its own integrity, observing the presence or absence of dislocation, void, activities Flexible two-way sliding seat seismic grid ball bearings, fixed bearing is displaced, the amount of displacement is normal, fixed connection is intact, supporting cushion crushed stone concrete for cracks, dust deposition and whether the aging of rubber bearings cracking, deformation is uniform, steel truss bearing steel pots, ball bearings with or without the appearance of rust dust cover is intact and so change phenomenon. Causes the function to reduce bearing steel grid is very complex, so before performing repair should accurately grasp the reason for the change, repair method chosen for reasons very important, and two-way grid seismic displacement ball bearings, different The repair method sometimes bring to adversely affect other parts of the structure, inherited, not only depends on bearing steel grid itself, the impact is more to be produced under other steel truss bridge abutment and comprehensive consideration of the full-bridge structure parts situation to the selected patch sewn methods. Steel truss bearing repair method, according to their location and extent of damage to the seismic grid ball bearing, generally can be divided into the replacement, repair, reinforcement and protective coating, these patches are described below is a method, bridge support seat replacement, bridge bearings every year in the course of aging, steel truss seat itself and the base will be partially damaged or severely damaged, while the beam instead of the top acts of the core holder worse is often the case, called to replace them all in to replace them all in recent years, there will be replaced by rubber bearing steel bearing practice, so it should be noted bearing steel grid do not have too much compression, but also pay attention to the order of replacement and construction accuracy problems. Bidirectional slide ball bearing seismic grid, grid seismic ball bearings, Hengshui Hao-Hao-produced by Hengshui Rubber Company. Hengshui HaoTong Engineering Rubber Co., Ltd. (www.htgcxj.com) strong, credible, Hebei Hengshui site construction materials industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement through innovative ideas will lead Hao engineered rubber and you work into the brilliant, for a better future!