The project of Xixiaoping Bridge(DK107+921.80) was chosen as pre-stress concrete continuous box girder bridge,whose span is 48 m+80 m+48 m. As the bridge located in the seismic area of 7 degree,the seismic design should be made.

• 石太客运专线的西小坪大桥主桥(DK107+921.；80)采用预应力混凝土连续箱梁方案；桥跨布置为48 m+80 m+40 m；位于七度地震区；需要进行抗震设计