This method is also applicable to the problems of pumping (watering) at constant or inconstant rate in fully penetrating well or partially penetrating well.

In this paper,we establish the computational models for unwhole piles based on the restriction of the top and the end of piles,and study the stability of the unwhole piles in the homogeneous soil under axial cycle loads.

Unified symmetry of the holonomic system in terms of quasi-coordinates;

Hojman conserved quantity for holonomic systems with redundant coordinates;

The application of Hamilton s principle in non-holonomic systems;