(1) During the use of the bridge, any bridge will become the old bridge.Early construction of the bridge, because at that time people on the pavement function, disease awareness is limited, so there is often a small reinforcement, reinforced diameter is too small, pavement and bearing components of the interface is not continuous and other issues. Therefore, the old bridge reinforcement and transformation has become inevitable.

(2) For the economic analysis, bridge reinforcement can save a lot of investment, received a good social and economic benefits.The use of appropriate reinforcement technology and broadening measures to avoid the removal of the old bridge and the reconstruction of the new bridge and increase the cost of the project; and some can even be disrupted in the case of traffic to complete, but also to restore and improve the carrying capacity of the old bridge And the ability to extend the service life of the bridge to meet the needs of modern transport.

(3) Strengthening the bridge not only can improve the highway bridge capacity and service level, but also to eliminate traffic safety hazards.