Comb bridge expansion joint A Shape of Luyun expansion joint
The bridge expansion joint itself is designed to meet the free expansion deformation of the bridge deck, and is intended to adjust the displacement and connection between the superstructure caused by vehicle loads and bridge building materials. Generally, it is set between two beams, between the beam end and the abutment or at the junction of the bridge, so that the expansion joint can expand and contract freely in both directions parallel to and perpendicular to the axis of the bridge, and it is firm and reliable, so that vehicles can pass through comfortably and smoothly without sudden jumps or noise.
Comb type bridge expansion joint A Luyun expansion joint shape Expansion joints of Luyun Bridge include butt joint, steel support, modular support, shear combination (slab) TST Elastomer, comb plate TSSF Weathering steel expansion joint KS A variety of styles, such as spanning style, are suitable for corresponding types of bridges due to different designs. When purchasing, customers must provide cross section drawings of bridges, mainly including cross slope, sidewalk, safety belt Railing The location data and other detailed information of the bridge expansion joint shall also be used as reference for the temperature and temperature difference during the installation of the bridge expansion joint.
Comb type bridge expansion joint A Luyun expansion joint shape Transportation and storage of bridge expansion device (1) When the expansion device is loaded at the factory and unloaded at the site, pay attention to the reasonable position of the lifting point to avoid distortion, collision, bending, scratching, etc. (2) During transportation, protective pads shall be set up and firmly bound, and the expansion device shall not be damaged due to the bumping and loosening of the road. ⑶ When the expansion device is transported to the construction site for storage, it shall be cushioned off the ground at least 30mm It shall not be stored in the open air, and shall be covered with color strip cloth to prevent rain and water. After the installation of the expansion device, after the installation of the expansion device and between the completion of the concrete construction and the strength reaching the design requirements, all vehicles and personnel are prohibited from rolling and trampling 50m Warning signs shall be set within the scope to remind vehicles and pedestrians to bypass. After the construction of the expansion joint after the concrete pouring, the color flag shall be used to set the forbidden line, and special personnel shall be assigned to watch over it to prevent the concrete surface from being damaged. asphalt Fine surface layer protection measures In addition to the above protection measures to prevent pollution during the construction of expansion joints, it should also be noted that the construction vehicle tires should be cleared of mud before entering the oil surface. The dust when blowing grooves should be set up baffles to prevent random scraping. Wastes should be collected and transported away, and should not be piled up in disorder. If you are not careful about pollution, it should be cleaned and cleaned in time.
Comb type bridge expansion joint A Luyun expansion joint shape The influence of temperature on the expansion of bridge expansion joints: the influence of season and temperature on the expansion of rubber bridge expansion joints , As the temperature change is the main factor affecting the bridge expansion, it can be divided into linear temperature change and nonlinear temperature change, of which the linear temperature change plays an important role. When the bridge structure is in a specific temperature environment outside, the temperature distribution inside the beam body is uneven, and the end of the beam body has angular displacement due to the change of thermal properties of materials. For bridges with small span（ L≤8m ）The linear expansion coefficient is very small, which can be ignored; Great attention must be paid to the design of long-span bridges.
