Abstract
The normal function of the shield spiral dumper has an important impact on the safe and efficient tunnelling of EPB shield, and the driving torque is the key decisive parameter that determines whether the spiral dumper can function normally. On the self-designed and commissioned manufacturing model test platform, the indoor reproduction test of EPB shield screw conveyor slag simulation was carried out. The theoretical calculated values were highly consistent with the test results, and the average relative error of the three tests was 8.65% to 9.18% at 6 rpm. The average relative error after entering the steady state was 4.6%, and the maximum relative error was 8.9% at 15 rpm. Through the shield model screw conveyor laboratory test, the correctness and validity of the proposed shield screw driving torque calculation model were verified and the proposed theoretical calculation method has good practical application. It is obvious that this calculation method has sufficient validity in the design of shield screw device.
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