The soft soil is widespread in Pearl River delta area.There are many problems in reinforcing a dike or constructing a crossing-dyke sluice on soft soil grounds during the construction process

in which the most difficult and key technical problem is the treatment of soft-soil grounds. Several problems that are encountered in construction at present are discussed in this paper

including how to determine reasonably the bearing capacity of soft soil grounds and treat the ground of sluice; how to calculate exactly the settlement of soft soil grounds and control the velocity of filling; parameters selection of soft soil under reinforced dike ; lateral soil pressure; application of the composite foundation and infection of construction sequence on soft soil etc.. The quality and security of project are affected by these problems

which should be solved urgently in present construction works.