Research object: processes of ground development by clamshell working organ. Research purpose: increase of efficiency processes of ground development by clamshell working organs due to rigging of them by a central spiral anchor. Research methods are based on approach of the systems and analysis of existent researches, classic theories of cutting of ground, mechanics of continuous environments, mathematical modeling and information technologies, mathematical statistics, multivariable model experiments, executed in accordance with an orthogonal design. Equipment: measuring pressure pick-off IPD2; microcontroller of USB Ni 6009; COMPUTER; licensed software of PowerGraph of 3.x Professional; dynamometers of DPU-2-2 and DPU-0,5-2. Theoretical and practical results, novelty: first in theory grounded and conformities to the law of new method of development of soil, which includes the process of screwing up of spiral anchor with the subsequent closing of jaws of clamshell, which provides tearing away of some central volume of soil (bodies of rebound) and cut of leave soil, aside well-educated opened surfaces of array an anchor, are experimentally confirmed; the mathematical model of introduction in the array of soil of jaws of clamshell is developed, which takes into account the parameters of base machine, clamshell, physical-mechanical properties of ground and parameters of spiral anchor; for shallow-lying spiral anchors (Ня (3…4)Dл) the mathematical models of efforts of tearing away, sizes and the masses of bodies of rebound are developed taking into account moving of anchor to beginning of process of destruction of superficial layer of array of ground; dependences of effort of tearing away, configuration, volume of body of rebound are first set on the form of area of single-turn spiral blade; rational correlations of sizes of bodies of rebound and clamshell are first set, which provide power-saving process of ground development; it is well-proven that unlike a traditional clamshell, a scoop is equipped a central spiral anchor can develop ground of the IV category without the external loading from the side of base machine, here the coefficient of filling of scoop is increased in once or twice to Kн = 0,4…0,6; recommendations are developed in relation to modernization of clamshells; a technical document is developed on a clamshell scoop by the capacity of q = 0,25 m3 and q = 0,3 m3 for the excavating machine of EO-2621 and hydraulic manipulator of "Hiab 026 T-1". Degree of introduction: the results of researches are inculcated in an educational process at implementation of course projects and works from disciplines of "Machine for earthworks" and "Basis of modernization of build machines", also corporation "Promtekhservis" is used during modernization of hydraulic clamshell for the manipulator of "Hiab 026 T-1". Scope of use: enterprises which design and make clamshells; organizations which exploit a build technique.
