The soil from its natural composition shows irregularities, many times these irregularities are observed from one foundation to another.
It can also hide invisible dangers, such as caves under the base, underground rivers that can carry the ground and weaken its ability to absorb construction loads.
Although it is necessary to control by drilling a sample of the foundation soil with special drills before even the design of the building, however only in very large and important projects the soil control is performed.
Civil engineers to find solid ground remove loose ground until they find the most stable. (The lower layers of the soil are more stable because they have been compacted by the weight of the upper layers of the soil)
Excavations are a serious cost for construction. Large wall bases are another serious cost to build.
Question.
Why not remove large, wide bases that are expensive and require a formwork, replacing them with deep bases?
1) In-depth bases do not need large excavations.
2) In-depth bases do not need formwork
3) Deep foundations do not need much concrete.
4) The foundations with depth, show you the quality of the foundation because the required drilling that is needed for the foundation in depth is at the same time a sample check of the soil. 5) If you use the mechanism of the invention that I propose, you also achieve improvement of the soil before the construction, from the foundation surface, without excavations, because the anchoring mechanism through the help of a hydraulic tractor condenses it both horizontally and vertically, creating a strong foundation.
6) With the mechanism I propose creators and anchoring of construction and ground, which does not exist in the current design, which diverts seismic loads into the foundation ground, preventing them from being directed on the cross sections around the nodes.
The lateral seismic loads, cause overturning torques of the vertical elements which are transported to the cross sections around the nodes which react with reverse torques.
The result in a strong earthquake is that all sections are strained until they break. The pre-tensioning of the walls + anchoring to the ground prevents the overturning moment and the stresses in the cross-sections, because they divert the seismic loads in the ground.
There is also the shear force. The prestressing on the wall has beneficial effects on the shear forces.