The method for soft connection of expansion joints is as follows:
The bridge frame that needs to cross the expansion joint should have at least one long straight section on one side, preferably exceeding 30m, or the sum of the straight sections on both sides of the expansion joint bridge frame should be 30m, with no horizontal or vertical bends in the middle. In order to leave cable expansion allowance in the bridge, this allowance should be greater than the expansion joint width L.
When there is enough space under the bridge at the expansion joint, the bridge can be disconnected, and the distance B should be greater than the width L of the building expansion joint. At the same time, it is necessary to ensure that all cables can freely expand and contract with the expansion joint without damage, and to meet the minimum bending radius R requirement for cables during extension and contraction.
If there is not enough space under the cable tray at the expansion joint, a widened straight through should be installed at the nearest point to the expansion joint. The specifications of the widened straight through should meet the requirements of leaving enough cable expansion allowance and meeting the minimum bending radius of the cable during expansion and contraction. The distance B between the widened straight lines on both sides of the expansion joint may be slightly greater than the width L of the expansion joint. When there is no space horizontally at the expansion joint and it is impossible to install a widened straight through, it can be appropriately shifted to both sides of the expansion joint. When one widened straight pipe is installed on each side but still cannot meet the requirements of sufficient cable expansion and minimum bending radius, two symmetrically connected widened straight pipes can be installed on both sides of the expansion joint, and the distance B between the cable trays on both sides of the expansion joint is still slightly greater than L.