The main geology matters of the foundation were the silt plastic state and miscellaneous fill with the poor stability ability and restrictions on constmction site conditions and economic considerations. The final choice of support scheme is:I section is supported by the top section slope-DJM-soil anchor; Ⅱ,Ⅲ are supported by shotcxete-bolt support. The later defom.ation monitoring data show that the sup- porting schemes are successful.