Cambering is a measure taken in construction to offset the sinking amount of formwork caused by the weight of concrete. formwork bears the weight of concrete, it may sink and deform, which will affect the flatness and dimensional accuracy of the building structure. Through cambering, this sinking amount can be taken into account in advance to a certain extent, so that the concrete structure after pouring can maintain a relatively ideal shape and size under the action of gravity. The degree of cambering is usually determined according to the specific engineering situation and design requirements !
When building a bridge over a rural river, whether cambering is needed depends on various factors. If the span of the bridge is relatively long and the load it will bear is significant, then cambering can help offset the potential sagging of the bridge deck due to the weight of materials and other factors. If the span is small and the load is light, cambering may not be necessary. However, the specific situation still needs to be comprehensively judged according to the design requirements and actual engineering conditions !