Bridge expansion joints _ _ Hao-engineered rubber bridge expansion joints d provided by the Engineering Rubber Co., Ltd. Hengshui HaoTong. Bridge expansion joints _ _ Hao-engineered rubber bridge expansion joints d Hengshui HaoTong Engineering Rubber Co., Ltd. (www.htgcxj.com) launched this new upgrade, the above picture is only for reference, please call the contact or pictures on this page phone, obtain the latest information, contact: Liu. SG-type bridge expansion joint device bridge expansion joints, is by the Shanghai Municipal Engineering Design Institute, Shanghai Rubber Factory Rubber Factory and Hunan Provincial Road and Bridge Company in 1991 jointly developed Modular bridge expansion joint device products. Characteristics and principles of bridge expansion joints constructed bridge expansion joints consist of two basic components: a bridge structure across - the beams across the gap joints to withstand dynamic load of the vehicle, and passed to the bridge structure; in the middle of I-shaped steel Liang - in the middle between the side beams and beam or beams of two intermediate gusset structure, neoprene gasket unit in the form of a parallel structure joints position, bridge expansion joints to form a continuous barrier layer . The device uses ordinary beam made of separate beams, steel beams in separate top surface has a concave plate fd80 bridge expansion joints, which is linked with the formation of the cover with high strength bolts rubber molding (bird shape) fastening position. Activities beams with a thickness of 15 ~ 28mm steel plate welded and heat-treated to eliminate welding stress, which is arranged pitch 1.5mm. Wuhan Han River Bridge is damaged retractable telescopic device after the device is a lot of water seepage, causing steel bridge expansion joints area of ??corrosion, plate rubber expansion device uses Tianjin Eastern Ring Road overpass just one year there appeared rubber cracking, plate exposure, anchor off, bridge expansion joints affect the normal use of the bridge, Dalian City, Liaoning Province, flat steel telescopic device overpass soon after the unification serious damage, telescopic device off, anchors exposed, produced a strong jolt when the car after the impact beam end, resulting in some damaged concrete girder ends, there have been holes, seriously affected the normal transport , Liaoning Province Xianglujiao overpass, the main road northeast section of the full-length 2023m, total plate rubber expansion means 24 bej bridge expansion joints, bridge expansion joints on both sides of the prevalence of broken pavement, herbs penetrate the cap, bolt deformation, angle open welding bounce, rubber sheet break loose bridge expansion joints, void abolished, accounting for about 90 percent severely damaged. Shaanxi Province and the Weihe River Bridge on the road, the traffic has not been less than four months to a higher temperature change temperatures, bridge expansion joints rubber expansion means full bridge plate deformation uplift, bridge expansion joints uneven deformation, steel and rubber peeling, some have been very serious, not only affect the driving comfort, but also affects traffic safety.