Tabachnikov S. Bearing Capacity of CFA Pile Anchors in Dispersed Soils

The object - the interaction of side surface of pale anchor with soil massif; purpose - the improvement the methodology of determination the load bearing capacity of bored piles under action of pulling and denting loads; the methods - the experimental methods of researching the load bearing capacity of piles in lab and pilot conditions; the standard methods of determination the physical and deformational properties of soils; the methods of math statistics for experiments results processing; the methods of solving tasks of soil mechanics using limit equilibrium theory; the math modeling of stress-strain state of the system like "a pile anchor - a basement" using finite element method (FEM); the newness - the distribution pattern of resistance forces by side surface of the pile only by forming near pile's stress state of the soil of its own weight without affecting the vertical loads, i.e. formally in rest state has been identified for the first time; it has been proven that the direction of the vertical load is crucial for the development of the forces of resistance on their side surface by interaction of piles with ground array and a new patterns of development of resistance forces on the lateral surface of the pile depending on the action of pulling and denting loads has been obtained; a new theoretical decision for accounting the additional compression forces the lateral surface of the pile under action of pulling and denting loads has been obtained; an analytical method of defining the depth of the pile with predetermined pulling load has been offered; the results - the method of defining the depth of the pile with predetermined pulling load based on data from building code (В.2.1-10-2009) has been developed; a new method of determination the load bearing capacity on the lateral surface of the pile in a state of rest and with taking to account the direction of vertical load has been developed; a precision of methodology of determination the load bearing capacity of bored piles under action of pulling and denting loads has been improved and increased; the laboratory-scale plant which based on patented process and allow to increase the reliability of results in determination the load bearing capacity of bored piles under action of pulling and denting loads in different soil conditions has been developed; the department - construction.