The stability of bank is very important for safety of bridge which is constructed on it. Therefore

the stability analysis of rock bank with masses of joints and faults under bridge load should be carried out for Furongjjang bridge. Based on the laboratory tests results

the machnical parameters of bed rock and cement face between skewback and bed rock are obtained. Considering effect of beding and vertical joints

the analysis of stability of bank is done with strength reduction method. And according to the calculation results

the slide surface is a typical polygonal line because of failure of joints and faults. After the construction of bridge

a practical slide surface would form under skewback due to huge bridge load; and it is very harmful to the stability of whole bank slope. Threrefore

it is necessary to reinforce the bed rock behind the skewback.