Abstract
The article describes the developed and proposed to use device of outriggers, which provides an additional anchor force during operation of the crane on soil bases, that increases the holding torque of the crane. In the proposed external outrigger of the lifting machine, a screw which is screwed into the ground, and which has a conical tip and an angle of elevation of the helical surface less than the angle of friction of this surface against the soil, serves as a base plate. Upon that, the outrigger is equipped with an auger rotation drive, which, together with the feed drive, is screwed into the ground without chip separation. A calculation example shows that such outriggers can increase load stability, therefore, the lifting capacity or working radius of the crane can increase by 1.79 times and even more opposed to when the crane is working on conventional outriggers.
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