Hao-engineering rubber, unidirectional sliding bearings, sliding bearings supplied by Hao-engineering rubber. We are Hengshui HaoTong Engineering Rubber Co., Ltd. (www.htgcxj.com) located at: Hebei Hengshui specializes in: grid bearings, bridge expansion joints, water stop, bridge bearings, rubber bearings, ball bearing steel bearing can be installed in front of the box to check the packing list, including parts lists, copies of inspection reports, bearing product certification secretary install conservation rules, the construction unit shall be arbitrarily rotated after unpacking slip bearing universal coupling bolts, and one shall be arbitrarily Removing the bearings, bearing mounting height should meet the design requirements, to ensure that the level and smooth bearing plane. Supports four hinge bearing surface height difference should not be greater than 2mm. Installation and precautions ball bearing. Concrete grade beam bridge and part of the field should not be less than tons C40, special circumstances require approval by the design unit. When installing bearings, bearing plate should be in the next four weeks bearing steel template adjust the level of two-way sliding bearings, and bearing plate under the pier above the top surface of the bottom surface mount 20-50mm identify the location of vertical and horizontal lines, making meet the design requirements. Filled with epoxy mortar seat cushion underside, foreign general installation method, commonly used epoxy mortar mix. After hardening epoxy resin mortar, eradicate temporary steel wedge bearing corners and fill the position of the wedge is drawn with epoxy mortar. After the installation is complete beam bottom, or in-situ concrete beams formed and after reaching the overall design strength before tensioned prestressed beam, the demolition, sliding bearings under unidirectional bearing plate to prevent the beam constraint normal rotation. Once the changes in the new situation should be promptly cleaned or repaired outside and check the reason from the degree of change and the surrounding circumstances, as soon as possible to make a judgment whether to repair and strengthen the daily work style is very important. Bridge bearing damage causes are many, generally considered the forces acting on the bearing and deformation often exceeds the design requirements exceed the design requirements is the main reason, while imperfect construction and quality management is also one of the reasons, therefore, in the design should take full account holder force, displacement and use of the environment, but also must ensure the construction quality. The main aspects of the type of bearing damage and its causes can be summarized as follows: bearing itself bearing itself deformation due to structural deformation of the main force curved bridge or ramp bridge complex, resulting in uneven stress concentration at the supports. Not dense or mortar base plate corrosion, processing quality control is lax sliding bearings, bearing itself is flawed. Bolts, nuts and shedding of the construction there is no deformation when tightened, corrosion, deformation, vibration is considered insufficient. Sliding surface or rolling surface corrosion.