FAQ highway bridge laminated rubber bearings and processing pass highway bridges, urban viaduct has become the main traffic arteries and hub cities play an important role in the national economy and people's daily life. Bridge bearings is an important part of the bridge structure, a direct impact on the life and structure of the safety of the bridge, which, laminated rubber bearings because of its simple structure, reliable performance, easy installation of replacement, low cost, has been widely used in highway urban bridge construction. But some common diseases of issues that we need in a timely manner in the laminated rubber bearing, and timely measures to replace the bearings. Roads and bridges; laminated rubber bearings; processing pass in this article it will laminated rubber bearing problems often appear in one treatment, targeted prevention of disease and ensure proper use of roads and bridges. 1, the support cushion stone and beams supporting the wedge bottom position, size, elevation construction deviation is too large. That support cushion stone and beams supporting the bottom of the wedge position is not accurate, wide on each side of the bearing size is too small, highly branched cushion stone and beam bottom bearing wedge too large or too small, pad stone top elevation of Construction deviation is too large. Prevention points: pier, support cushion stone and beam bottom bearing wedge respond before construction Surveying be reviewed to ensure the accuracy of its construction control line to meet the requirements, and to carry out technical tests related to construction personnel, in strict compliance with the design during construction and regulatory requirements to ensure the quality of its construction to meet the requirements. 2, the support is not level concrete pad stone top surface, uneven, and insufficient strength, concrete is not dense, internal voids and other defects, affect carrying capacity. Prevention Important: When installing the application pad stone side mold level ulnar level, no level of the top of the mold should be adjusted in a timely manner. Note that when the concrete pad stone stone top surface of the pad be smooth but not calendered, so that the top surface of the concrete pad stone side molding abuts along the same horizontal plane, and if necessary should obtain the consent of the design, to improve concrete grade, C30 C50 concrete as concrete change. Site surface concrete pad stone cutting hair hat beam should thoroughly, small square concrete pad stone amount, but it must be mechanically mixing, non-artificial random mixing. To strengthen concrete tamping, ensure the concrete dense and reliable. (3) support cushion stone and beams supporting wedge insole reinforced through the large gaps or protective layer thickness. Prevention Important: pay attention to the quality of construction stone and beams supporting seat bottom support wedges and other small parts, in strict accordance with design drawings and specifications reinforced install these parts. (4) Individual bearing specification model is not entirely consistent with the design requirements. Prevention Highlights: Supports the procurement approach and shipped to the next pad stone ready to install when the holder should carefully review the specifications, type, quantity, to ensure that the entire bearing specifications, models, the number of full compliance with design requirements. When the construction is found lacking some bearing or specifications, wrong type, the holder is prohibited throughout the random substitution, nor be a large generation of small, weak to strong-generation, but not for small generation of large, on behalf of the weak and strong . Location (5) bearing installation, construction deviation direction is too large, or even inverted bearing longitudinal and transverse directions.