[] Bridge expansion joints bridge expansion joints Bump basic measures to prevent short form [Bump at Bridge Expansion] There are many reasons, the design of ill-considered, inappropriate material, adverse operating conditions, poor construction management and conservation improper, many reasons can lead to different degrees of damage bridge expansion. [Bridge] beam end joints specially designed beam ends to have sufficient rigidity to meet operational role in the process of repeated loads. The design process to use proper stretching distance to ensure the normal use of telescopic device. [] A reasonable selection of bridge expansion joints bridge expansion joint device selection [] means the most important is the telescopic device itself stiffness and mass, ideal telescopic device must meet the following requirements: ① meet between the upper structural beams and beams and beam sets displacement; anchor ② telescopic device is solid and reliable, durable, resistant to mechanical abrasion, impact; ③ vehicle balance and comfort; ④ to prevent the infiltration of rainwater and garbage; ⑤ easy to install, simple, easy to check and easy to track maintenance workers operation. At present, China's highway construction telescopic device used in many types of concrete to be analyzed and compared according to the availability and variety of telescopic device to adapt the scope, select the most economical, most reasonable type. [] Anchor bridge expansion joints installed width means telescopic device: Beam (Slab) end anchor width by 50cm set as appropriate. The abutment should be adopted to set the width of the back wall. Telescopic device anchoring bars: in precast beams (board) and the end of the back wall anchor bars embedded telescopic device should be symmetrical, each beam (plate) center to be set. Location telescopic device angle: Positioning angle telescopic device must be measured in accordance with the installation temperature, calculate the amount of stretching joints to adjust the distance between the two positioning angle, the construction joints from the strictly controlled. For this seam should be eliminated from the practice rather small not big. [] Bridge expansion joints installed specific requirements: bridge expansion joint devices and 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 welded portion after z-type bridge expansion joint manufacturer of innovative design, in order 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 quality low-cost 40-type bridge expansion joints, welding, etc. at the same time should meet the specifications. 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 expansion joints bridge expansion joints steel casting factory finished products for sale, C50 for concrete stones, sand, water, cement and additives etc. Strict implementation of construction with more than C50 concrete. Concrete bridge expansion joints using mechanical agitation 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. Bridge expansion joints | z-type bridge expansion joint manufacturer of innovative design | GB, range provided by the Hengshui-Engineering Rubber Co., Ltd.. Hengshui-Engineering Rubber Co., Ltd. (www.grgcxj.cn) (www.grgcxj.cn) is specialized in "earthquake spherical steel bearing, one-way two-way sliding spherical steel bearings, ball joints fixed elastic damping bearings," the enterprises, companies adhering to the "honesty, hard service" concept, to provide you with the highest quality products and services. Welcome to inquire! Contact: Mr. Wang.