Safety installation of bridge expansion joint
The bridge must be timely cleaning, filling gap: with artificial air compressor to clear cutting asphalt concrete range, and chiseling concrete loose, while the joint internal debris to clean up。 The slit width must meet the design requirements after cleaning with width, the benzene board expansion joint block strict recovery。 The embedded anchor bar。 The number of reserved rebar should be consistent with the design drawings, if it does not correspond to timely repair welding。 Using air compressor to clean up again。 In order to prevent the expansion joint installation process of weld burn in foam board, foam board on both sides of steel or iron cover。
When you want to install in place with telescopic joint crane lifting, should check the crane hook, prevent decoupling, lifting should be strictly in accordance with the manufacturers for crane hoisting, and in accordance with the design drawings to rolled steel. In the fixed process using the method of controlling the cable telescopic device in line and straight. With a length of more than 3m or Aluminum Alloy steel I-beam has enough rigidity are laid on the joints on both sides. To control the elevation along the vertical direction of steel joints with 1m spacing and placed on both sides of the joint construction with wedge type steel joints will be flat, and then use the 3M ruler with self-made door frame segment precision adjustment flat, should be used in the process of levelingAfter the expansion joint is in position, the center line and elevation of the expansion joint shall be adjusted, and the elevation shall be determined according to the measured road surface elevation in the 5m range on both sides of the seam.