[GQF expansion joint devices, Kunming D80 type bridge expansion joints installed] getting goods are consulting Fangqing offer when choosing the type of expansion joints, depending on the amount of stretching of the bridge, the size is determined by calculations and consider leaving a certain amount of additional . In addition to structural measures should also be noted. 1, butt butt joints is constructed according to the different forms and mechanical characteristics can be divided into packing and embedded solid butt butt-type two. Butt-type joints are generally used for packing the amount of stretching on 40mm or less conventional bridge project; embeded telescopic docking devices are widely used in stretching the amount of 80mm and below the bridge project. 2 [GQF expansion joint devices, Kunming D80 type bridge expansion joints installed] getting goods offer both consulting Fangqing, steel-bearing steel assembly type expansion joints are made of steel and can withstand a direct construction wheel loads. This telescopic device previously used for steel bridge, is also used in concrete beams. 3, plate plate rubber expansion joints is a combination of having a rigid telescopic device. After it withstand the load, there is a given vertical stiffness, and therefore have the ability to span large gaps (ie, large telescopic), steady traffic advantages. 4, analog to digital-bearing modulus-bearing joints is the use of shock-absorbing cushion of good performance and easy to do the sealing rubber material with high strength and rigidity, good shaped steel combination, in the case of a large amount of displacement can withstand vehicle loads. 5, seamless seamless expansion joint is a joint structure does not extend the bridge deck expansion joint products are also known as TST bridge expansion joints, stretching the gap filled with an elastic material in the ends of the bridge and covered with waterproof material and then in the bridge deck pavement paving viscoelastic composites, so at the bridge deck expansion joints and other parts of the pavement to form a continuous body to deform the connection seam bituminous concrete and other materials to withstand a stretch defined structure expansion joints: rotation and longitudinal displacement of the ends of the bridge to coordinate natural factors, such as changes in temperature bridge deck there is expansion or contraction of longitudinal deformation, vehicle load will also cause rotation and longitudinal displacement of the beam end. In order to meet the vehicle smoothly through the deck and the deck deformed joints [GQF means Kunming D80 type bridge expansion joints installed] getting goods offer both consulting Fangqing need to set some telescopic device in the bridge deck expansion joints. This device is called the bridge expansion joint device or joints. The design and construction of the bridge expansion joints, should consider the following requirements: 1. Be able to adapt to temperature changes caused by stretching of the bridge. 2. The deck is flat, with good configuration. 3. Easy construction and installation, and the bridge structure associated with as a whole. 4. With safe drainage and water construction. 5. assume the role of a variety of vehicle loads. 6. maintenance, easy repair and replacement 7. Economic expansion joints inexpensive because there is displacement, and subjected to horizontal loads and wheels rattling action, such as poorly designed TST joints easily lead to premature failure, influence and increase maintenance costs . Good bridge expansion joints should be able to adapt to the load-bearing structure in the horizontal and vertical displacement and rotation, to ensure continuous and smooth surface, anchor and reliable means [GQF joints, Kunming D80 type bridge expansion joint installation quote] getting goods are Consultant Clear water and dust in the city bridge should also minimize the noise generated by the vehicle through occurs. The main span of the bridge expansion joints for bridge, stretching joints to choose the amount of size, sub rigid joints and elastic joints categories. The main joints covered with rigid steel joints, by its slip displacement to accommodate the displacement of the upper structure of zinc metal joints, steel expansion joints, comb plate expansion joints, expansion joints and other rolling drag. ① zinc metal joints. For the use of U-shaped strip of zinc metal is embedded in the bridge deck seam groove, which filled with flexible waterproof material (bituminous sand, etc.), overlying the road for less than 10 mm telescopic occasions. ② steel joints. Line with 15 to 20 mm thick steel cover at the seams, steel plate welded to the side anchored to the deck of the angle, the other side is the activities supported by the relative anchor angle, under the joint plate shall be provided within the drainage channels for stretching the amount of 20 to 50 mm in the case. ③ comb plate joints. It is able to adapt to a large amount of stretch joints, with two comb steel counterparts convergence, overlying deck seams. Due to the shape of the fingers interlaced, also known as the fretboard joints. Comb plate plus cover over the steel plate to prevent dirt embedded in the gap stretching effect, the maximum amount of stretching up to 400 mm. ④ roll drag expansion joints. As a large expansion joints, because the Department of Federal Republic of Germany DEMAG created company, also known as expansion joints Marker