2. Clay and loose soil are not suitable for foundation. If it is clay, because of its compact structure and poor water permeability, it is not conducive to the growth and reproduction of aerobic bacteria and the self-purification of soil.
If the water level is too high, the foundation will be wet. If the groundwater level is too high, the house is not only wet, but also in danger of collapse, and it is easy to cause groundwater pollution. Living in this house for a long time will induce various rheumatic diseases. If the building is built in a place with high water level due to the limitation of lots, it is necessary to raise the foundation fill and remedy it.
4. Diseases caused by soil and water. Soil acts on human body through its water content or through food chains such as plants and animals. If the soil contains too few or too many essential elements for human body, it will cause regional diseases.
5. Hidden dangers of underground sewage emerge one after another. Underground sewage is neither easy to find nor easy to remove, which not only makes houses wet but also pollutes the air, seriously affecting the health of residents. The house also avoids the accumulation and flow of sewage on the ground, and it is easy to suffer from urinary system diseases after living for a long time.
6. Where there is a fire, the atmosphere is difficult to survive. Earth-qi carries all kinds of elements and nutrients contained in the soil, silently giving human body material and energy. If there is a fire in the house on this land, it is not suitable for foundation use.