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Input of the micropiles

The environment for the micropiles input management is the following:

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Reference diagram for the definition of the micropiles geometry

MICROPILES

Environment for the insertion of the micropiles data

The data to be entered are the following:

  • Initial abscissa (x0): It is the abscissa in whose correspondence the micropile must be inserted. It is inserted starting from upstream (the thrusting side) and is expressed in m;

  • Spacing distance x (Ix): It is the spacing distance between the piles, measured between the geometrical barycentre of the sections associated to the piles, in a horizontal direction (the direction contained in the board plane). It is expressed in m;

  • Spacing distance z (Iz): It is the spacing distance between the piles, measured between the geometrical barycentres of the sections associated to the piles in the direction normal to the drawing plane. It is expressed in m;

  • Diameter: It is the diameter of the micropiles used in the geotechnical calculation of the micropile (Limit load). It is expressed in m;

  • Above-ground height (e): It is the distance between the pile head and the natural surface level. In other words, it is the above-ground height of the pile. It is expressed in m;

  • Length (L): It is the working length of the pile (i.e. the length contributing to the resistance by limit load). It is expressed in m;

  • Yield moment (My): It is the yield moment of the section. Only steel is considered as reacting. It is expressed in kN per m;

  • Injection type: A necessary data for tubifix piles. It can be single or repeated;

  • Menard limit pressure: It is the limit pressure of the soil surveyed on site by means of a Menard pressure meter.

  • Alpha: It is the correction coefficient to be applied to the soil cohesion in case the micropile is a root-type pile. It is dimensionless.

  • Mean level: It is the level of the midpoint of the working length for calculating the limit load of the micropile. It is expressed in m;

  • Drained conditions: Tick off this option when you want to mould the ground as cohesive;

  • Undrained conditions: Tick off this option when you want to mould the ground as non-cohesive;

  • Pile from head rotation: Tick off this option if the boundary conditions of the pile are such as to allow the rotation of the pile head without generating additional reactions.

  • Pile bound to head rotation: Tick off this option if the boundary conditions of the pile are such as to allow the rotation of the pile head, and consequently generating embedment reactions.

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