Stability of River Dike: Study of Compacted Soils at Very Low Stress

River bank stability: Study of compacted soil under very low stress Introduction River banks are thin natural ridges or artificially made embankments or walls that adjust the water level. It is usually soil, usually parallel to the course of the floodplain river or low-rise coastline. The main purpose of the artificial dam is to prevent flooding in neighboring villages, show changes in the natural path of the waterway, and provide reliable navigation to maritime commercial over time. Water flow

The other extreme example is that the structural stability of the soil is very low, or there is a serious risk of breakage when subjected to a load or impact (so-called high-speed clay). The surface of clay minerals in these soils is usually covered with amorphous gel like material with high silica content (McKyes et al., 1974). This substance may be due to the fact that the early stage of the soil is strong salt water and it may be affected by the weathering process. For example, the rapid clay of Champrain sediments in Ontario and Quebec, and part of Scandinavia. This soil is most likely to produce the highest percentage of runoff and floating sediment, but once the slope is saturated with water to a considerable depth, it is most likely to produce mud flow. Some Andosols are thixotropic due to their similar composition, with similar low stability from volcanic material (tuff).

The type of soil has a great influence on their compaction characteristics. In general, heavy clays, clays, and sludges offer higher pressure resistance because sandy soil and coarse or gravel soils are easily compressed. Coarse grain is more dense than clay. Sloping soils can be compressed to higher densities. The thicker the soil layer undergoing field compaction is, the less energy input per unit weight of the soil, and therefore the less compaction during each rolling process. In order to obtain a uniform thickness, the soil thickness suitable for each layer is necessary. The thickness of the layer depends on the type of dirt contained and the type of roll, its weight, and the contact pressure of that roller. Typically, a layer thickness of 200 to 300 mm is optimal in the field to achieve uniform compression.

Compression is not only an increase in soil density, but also a change in soil structure. Healthy soil has multiple pore sizes, but compressed soil has almost small pores. In general, soil compression is defined as a method to mechanically increase soil density. This is an important part of the construction process under construction. Mechanical compression technology is used in almost all kinds of construction sites and construction projects. The main reason to compress the soil is to reduce subsequent sedimentation under workload. Even in building materials, the important engineering properties of the soil are its shear strength, its compressibility and permeability. Soil compression normally increases its shear strength, reduces its compressibility and reduces its permeability. In addition, compression reduces porosity, making water more difficult to flow through the soil.