Study on the Prevention Effect of Seepage Failure with Suspended Wall

To simulate the dual subsoil layers foundation of levee on the middle and lower reaches of Yangtze River which always present with shallow relative impermeable layer and thick permeable layer, a new kind of seepage box has been conducted indoors for simulating seepage field of the dual subsoil layers foundation. The seepage prevention scheme has been designed to study the seepage prevention function on the effect of seepage failure prevention for the suspended seepage prevention wall. The different kinds of impermeable materials and the different depth of suspended wall are used to check the effect of suspended seepage prevention wall. The following conclusions are inferred from the testing results: (1) It is equivalent in seepage prevention function by two different kinds of materials of suspended seepage prevention wall. Generally, clay grouted cut-off wall is economical and convenient for construction. However, impermeable suspended seepage prevention wall such as concrete wall is safer and more stable for the higher flood control standard area. (2) The seepage prevention function of suspended seepage prevention wall increases obviously the increase of the depth of wall. However, the depth is not needs too much for the control of the development of seepage failure.