Combined with the practice of the underwater cofferdam of Kangshan great dyke,the construction methods of bamboo cofferdam and reed cofferdam were summarized.

By analyzing the geological structure and lithologic feature of different sections of the dyke,it put forward the different measures of seepage control and reinforcement and gave out the construction keys of different measures and the attentive problems.

Textual Reseach on the "Levee" Homeplace in the "Levee Song" of Music Bureau on Nan Denasty;

Based on the Sweden analysis method,checking to the stability of countermeasures of landslide in construction finish time and stabilization seep time in some levee was performed,and the levee construction recommendations were given.

The engineering geology condition is complicated,the soil quality of dike body is weak.

Combined with the construction of Shanghai Lingang New City Luchao Harbor Westside Tidal Bank Surrounding Phase II Project, the article introduces the dike subgrade treatment and body stage loading construction technology, construction gist and technical measures.

Tensile property of the soil is relative to existence of dike cracks,therefore,it is important to understand its tensile property and determine the tensile index.

Through analyses of tectonic movement characteritics of depression in the easten area,tectcnic evolution history of Chang Ti potential mountain's positon in area constitution and the relationship between them are also probed into,and so as to lay a good foundation for the future explor.