Soil conditions of the dike body at Huanggang Yangtze river main dike is discussed.Soils of the dike body at Huanggang Yangtze river main dike are silt loams

silt clays

sandy loams and cracked stones. The structure of the soil layer of the dike foundation at Huanggang Yangtze river main dike is classified into class A

class B

class C and class D. The measure of seepage prevention in the dike foundation of the typical segment at Huanggang main dike on Yangtze river is given by means of seepage calculation . Considering the character of the structure of the soil layer at Huanggang Yangtze river main dike

principles to prevent seepage in the dike foundation at Huanggang Yangtze river main dike are given. The reinforcement of Huanggang Yangtze river main dike is the major methods to prevent seepage in the dike foundation. Methods to prevent seepage are on the basis of the results of seepage calculation

geographical and geological environments consideration and social factors near the dike. By means of comparison of projects

the reasonable scheme to prevent seepage in the dike foundation is chosen . Because permeable layers in the dike foundation at Huanggang Yangtze river main dike are sandy loams and mealy sands

Huanggang main dike on Yangtze river can not use relief wells and relief ditches to prevent seepage in the dike foundation.