Bridge expansion joints, under normal circumstances should follow Sunny standards, regulations highway bridges telescopic device, also refer to the highway bridge expansion practical manual and other relevant monographs determined by calculation. Single shock absorber when the bridge design, bridge expansion joints taking into account the role of rating earthquake, bridge expansion joints have been damaged may be partially ah without fatal disaster, so wool Le d40 type expansion joints, bridge joints using design displacement grade damping device type as the basic design parameters of reasonable amount of stretching its design can be determined according to the following formula. Bridge expansion joints Furthermore, due to the level of vibration type caulking joints Shallow earthquakes generated, often multi-direction, the situation is more complex, so in addition to the amount of stretching and accurate use of the design, the more important is the telescopic device itself should have this ability to adapt itself, bridge expansion joints monograph dedicated manual epilogue, on adaptation research and development of three-dimensional displacement telescopic device made an appeal, which is not only much-needed bridge expansion joints of bridge engineering development, but also a bridge seismic design need to consider the problem. Bridge expansion joints that are generally applicable to a small stretch to close seams kind of bridge, a necessary condition for its type in the structure of the beam length is shorter, the small amount of stretching their catch small birds, but do not worry about the deck cracked or broken The bridge project. This seam is usually applied to the asphalt deck, and for general concrete bridge deck should be used cautiously. The main reason is the kind of bridge expansion joints seam structure is characterized by the nature of the use of asphalt mixes to replace sawn telescopic joint material reserve tank, and when this mixture by specialized companies in order to carry out a special tie, it is difficult As a general material got, so only a small amount of use, while the situation before and after the bridge deck construction generally be selected according to the bridge. Bridge expansion joints on the following aspects of this joint has its own special requirements, the mixed material should be waterproof seams, waterproof seams when a wind of fine material, and wall bonding and strong, can withstand repeated stretching, can cope with considerable variation large elongation and materials c-40-type bridge expansion joints have resilience, waterproof seams material is generally the best available room temperature, poured into the type of elastic joint material. According to foreign experience, as shown in its general nature. Waterproof seam construction materials must be fully consider increasing their cohesiveness. Bridge expansion joints perpendicular to the sun's rays are most intense radiation directly to the expansion joints in the summer and winter weakest, and subject to the transparency of the atmosphere. Solar radiation is absorbed structure, partially outside the reflective structure. Solar heat is absorbed to make the bridge structure to avoid temperature increases and gradually transferred to the internal structure, bridge expansion joints are also part of the heat from the surrounding air due to the structure of the wall between the convection and radiation heat teach bad and made losses. Convective heat exchange with the surface of the structure in addition to the custom increases. During the day, the structure of the heat from the outside into the net, bridge expansion joints so that the temperature rise of the bridge structure, on the contrary, the heat in the night, because of the structure of the storage structure of the surface temperature above the ambient air temperature, the convective heat exchange and radiant heat heat exchange and cooling. d60 Maurer joints | Xi'an joints | manufacturers who buy a one meter by Hengshui HaoTong Rubber Company. Hengshui Hao-Engineering Rubber Co. (www.htgcxj.com) strong, credible, Hebei Hengshui site construction materials industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement through innovative ideas will lead Hao engineered rubber and you hand in hand into the brilliant, for a better future!