| Abstrakt: |
In the construction of an overpass transversal to an existing electric railway, when the overpass pier is door-shaped, and, when the clearance height from the bottom of the door-shaped pier cap beam to the contact wire electrified body is too small to use steel beam or I-beam for holding the formwork and meet the safety need prescribed by the Ministry of Railways, an innovative construction method was employed, in which D-type steel beams, originally used for railway track reinforcement, was lifted to get across the contact wire and the catenary from above with a gap more than 33.8cm, resting on the top surface of temporary buttress, and letting stocky horizontal beams hold the formwork of cap beam, so as not to affect the normal operation of the existing electric railway. This innovative technique has been granted patent for invention by the State Intellectual Property Office. |
