Subjects: Mechanics >> Applied Mechanics submitted time 2023-03-20 Cooperative journals: 《应用力学学报》
Abstract： In order to more realistically study the role of screw conveyor in stable excavation surface andslag discharge in the earth pressure balance shield , on the basis of the existing screw conveyor slag trans-port theoretical model , the actual inclination angle of the screw conveyor and the gravity of the soil , as wellas the actual working conditions of the screw conveying soil in the screw conveyor,are considered , and thetheoretical mechanical model is established.Based on the principle of eath pressure balance , the formulasof earth flow and earth pressure gradient of the screw conveyor are derived, and the variation nules betweenthem and various parameters are analyzed. In addition to considering basic mechanical parameters and slagproperty parameters , the effect of dfferent types of soil on slag efficiency and the effect of soil flow angleon soil flow and soil pressure gradient are also analyzed; the increase rate of soil flow increases with soilflow angle. The increase shows a non-linear trend that decreases first and then increases; the gradient ofthe earth pressure increases with the increase of the soil flow angle in a trigonometric function. It provides a certain theoretical basis and engineering reference for reasonable design , type selection ,and evaluation ofearth pressure balance shield screw conveyor in practical engineering.
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