Short Note on Causes of Rehabilitation of Bridges

Causes of rehabilitation of bridges 

i. Causes of Rehabilitation A bridge may require rehabilitation on account of the various reasons some of the reasons may be as under:

(i) Physical distress 

(ii) Vulnerability on hydrological consideration 

(iii) Use of obsolete/non standard materials such as 

a. Early steel girders 

b. Laterite stones 

c. Cast iron screw piles 

d. Corrugated steel pipes

e. Earthen ware pipes In case, due to introduction of new rolling stock, existing bridge is not safe, both its strengthening is to be done and, if not possible, rebuilding is to be done.