Originally published as How to make bridge expansion joints These on-site construction workers are already worried about losing their hair! In order to meet the requirements of bridge deck deformation expansion joints are usually set between two beam ends between beam ends and abutments or at the hinge position of the bridge The expansion joint is required to be able to expand and contract freely firmly personalised tailor tape and reliably in two directions parallel and perpendicular to the axis of the bridge The vehicle shall run smoothly without sudden jump and noise It shall be able to prevent the infiltration and blockage of rainwater garbage and soil The installation inspection maintenance and elimination of dirt shall be simple and convenient At the place where the expansion joint is set the railing shall be disconnected from the deck pavement Overview of expansion joints Brief introduction of bridge expansion joints The function of bridge expansion joints is to accommodate the displacement and coupling between the superstructure caused by vehicle loads and bridge construction materials Once the expansion device of skew bridge is damaged it will seriously affect the speed comfort and safety of driving and even cause traffic accidents Expansion joint function Ensure free expansion and contraction of beam body Make the vehicle run smoothly Good water tightness and drainage Convenient for removing dirt in the groove The expansion and contraction of the bridge is exposed to the atmosphere for a long time and the use environment is relatively harsh which is the most vulnerable and difficult to repair part of the bridge structure The destruction of bridge expansion joints may cause great vehicle impact load and worsen the driving condition which will lead to vehicle jump noise water leakage affect the safety of driving and sharply reduce the service life of the bridge Hazards of loss of function or damage to expansion joints