METHOD OF TESTING GROUNDS Russian patent published in 2006 - IPC G01N3/42 

FIELD: engineering research.

SUBSTANCE: method can be used for determination of physical and mechanical characteristics of grounds. Prismatic wedge is pressed into ground at permanent speed. Wedge is fixed at extendable core of rod for rotation relatively rod in plane being parallel to bases of its prism. Firstly the prismatic wedge is pressed in ground for its total height at speed of 1,5 m/minute to prevent its turn relatively rod. Then wedge is pressed for 5-10 mm deeper at speed of 5m/minute without prevention in its turn relatively rod. During pressing-in process of prismatic wedge, depth of its pressing-in is registered continuously as well as of resistance of ground to pressing-in. Angle of turn of prismatic wedge relatively rod is also registered. From the results achieved at preset depth of testing, the following various physical and mechanical characteristics of ground are calculated which characteristics can not be determined by known techniques: specific resistance of ground to wedge pressing-in, module of resiliency of ground; limit resistance of ground to shift, specific work of crack-forming of ground, angle of direction of anisotropy of ground strength.

EFFECT: improved truth of results of measurement for single-time test; reduced labor input; ability of determination of ground anisotropy.

6 dwg