Usually in small projects great importance is given to statics and very little importance to the foundation ground. The soil by its natural composition is inhomogeneous and its quality is given to change from one foundation to another. It can also hide other dangers such as caves under the bases and underground rivers that can carry the ground. For the above risks, drilling must be done before designing the bases to consider the soil composition which determines both the size and type of bases, in relation to the planned loads to be undertaken. However, only in very serious projects is soil sampling done due to cost. Drilling is necessary to place the patent mechanism under the foundations, so sampling the quality of the foundation soil is given by the design method I propose. Civil engineers to ensure a strong foundation in the construction remove the soft soil of the surface with the excavations to find more compacted foundation soil. The deeper into the ground the foundation is, the more compact and suitable the soil is, because the very weight of the upper layers has compacted the lower layers. Excavations are a big cost in construction but absolutely necessary. The method of the invention provides a stronger foundation ground because the mechanism is placed at great depths to which it carries static loads. and secondly it condenses them mechanically, more than they have condensed with their own weight, both in the horizontal direction and in the vertical direction. On the other hand, it ensures larger load-bearing surfaces because apart from the ground surface under the foot of the base, which bears the weight of the construction, there is also the adhesion of the mechanism to the drilling depths, which also receives large static loads. This extra foundation offered by the mechanism of the invention is absolutely necessary in an earthquake. During the earthquake the ground recedes, because with the vibration it condenses more, and the result of the compaction is to create subsidence. For this reason, water rises to the surface of the soil during the earthquake, because the compaction of the soil displaces to the surface the light water that was in the soil. This phenomenon becomes more intense near sea areas with loose soils from landfills So the pre-compaction of the soil which the mechanism of the invention applies to its horizontal and vertical cross-section, is very positive, because it prevents the subsidence of the ground in seismic displacements. Soil subsidence, when homogeneous, sinks the structure into the ground, while when the subsidence is inhomogeneous the construction either tilts or deforms the cross sections around the nodes of the construction. Here we see that the benefit of the invention is twofold, because it protects the construction on the one hand from deformations and on the other hand from subsidence. To achieve the double good we must also apply double pretensions. In order to achieve first of all the improvement of the foundation soil + compressive loads in the cross section of the wall, we practice two separate pretensions with the same tendon of the mechanism.
The first large prestressing is applied (before the start of construction) between the surface of the foundation ground and the anchoring mechanism that we have placed at the depths of a borehole. The tension is applied by a tendon with the help of hydraulic tractors, to expand the mechanism to the slopes of the drill, and by pressing them, condensation and adhesion are created, due to friction. The traction of hydraulic tractors must be in the order of twice that of the design calculation. After the traction is completed from the surface of the foundation ground, in order to remove the jacks and maintain the traction intensity, we secure the tendons with nuts. Then for greater adhesion we fill the drilling hole with concrete. With this method we completed the optimal improvement of the foundation soil + the anchoring of the anchorage. Then, using joint nuts, we extend the protruding tendon from the ground to the roof, gradually, and on the roof, with hydraulic jacks, we apply the second lower tension prestressing in order to impose compression on the cross sections of the construction. The compressive force on the cross-sections is imposed, in order to strengthen the cross-section towards the shear failure, and the anchoring of the structure to the ground is intended to deflect seismic stresses into the ground by preventing them from being driven over the cross-sections around the nodes.
Dear Aparna When we stop the deformation of the construction, yes there is no coordination vibration in the construction.
Dear Aparna Sathya I think I did not understand what you said.
Question. You mean the multilevel soil compaction applied by the anchoring mechanism eliminates vibrations on the soil surface;
There is a relationship between inelastic deformation and energy dissipation in structures that are subjected to earthquake ground motions. https://core.ac.uk/download/pdf/35468947.pdf
Check https://www.govinfo.gov/content/pkg/GOVPUB-C13-7ef961222255b92a5b22280139d40cb0/pdf/GOVPUB-C13-7ef961222255b92a5b22280139d40cb0.pdf
Also check https://cdn.ymaws.com/www.nibs.org/resource/resmgr/BSSC/P-749_Chapter5.pdf
Dear Aparna Sathya and Chinaza Godswill Awuchi
Thank you very much for your answers and information !!!
Dear Ioannis Lymperis
A soil nail system may be useful for your project.
Dear Ali Ahmadi
I have invented a mechanism for anchoring in the ground and in the rock. I believe it is the most powerful anchoring mechanism in the world.
Presentation PACKING MECHANISM - GROUND ANCHORING AND METHOD
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