The long-term uneven settlement may cause the pipe structure cracking, leakage or even serious damage during the operation of the immersed tunnel. Settlement control measures of immersed tunnel were generalized from design-construction-operation three stages as the time order, and the control measures in the construction stage was particular emphasized. The treatment methods of the base layer were reclassified into compact the base, replace the base and pile base three types and relative project cases were enumerated. Contrary to the shortage of present stage, control measures and suggestion that fit soft base were raised after compare.
