Abstract
In civil and reclamation construction, when laying the foundations and other elements of structures, work is carried out, which is accompanied by deep soil development. The energy intensity of the working process increases significantly at subcritical values of the chips due to the blocking of the part of the soil. Let us determine the critical depth of the asymmetric blocked one side. The calculated dependences show that as the cutting angle of the cutter decreases from 50° to 20°, the relative critical depth of asymmetric blocked cutting (hкp1/bp) increases: for refractory and semi-solid clay, from 1.71 to 3.12; for semi-hard loam from 1.76 to 3.27; for hard sand from 1.78 to 3.75. For semi-blocked cutting, this depth increases: for refractory clay, from 2.92 to 5.21; for semi-solid clay from 2.78 to 5.03; for semi-hard loam from 2.77 to 5.14; for solid sandwiches from 2.65 to 5.45. The mathematical models for determining the critical depth of cutting for the extreme lateral incisors of the multi-slip chains of trench excavators, operating in conditions of asymmetric lateral cutting and semi-block cutting, are obtained. Based on the obtained approximated mathematical models in each particular case, based on the data on the thawing soils recommended by BNiP, it was possible, depending on the cutting angle of the cutter, within the cutting angle of 20°…50°, to determine the rational depth of cutting for the extreme lateral incisors of the multi-slip chains of trench excavators.
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Kravets, S.V., Lukianchuk, O.P., Kosiak, O.V., Gaponov, O.O. (2020). Determination of Critical Depth of Cutting Soil by Cutters with Building Excavators. In: Onyshchenko, V., Mammadova, G., Sivitska, S., Gasimov, A. (eds) Proceedings of the 2nd International Conference on Building Innovations. ICBI 2019. Lecture Notes in Civil Engineering, vol 73. Springer, Cham. https://doi.org/10.1007/978-3-030-42939-3_62
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