Abstract To greatly improve the shield construction efficiency and reduce the construction cost, a synchronous technology combining shield tunnelling and segment assembling was proposed through the active control of the oil pressures of the shield propulsion system, and a total thrust force control method based on the principle of maximum pressure redundancy was built. Then, the whole system was tested and verified on the large-scale model test platform for synchronous technology combining shield tunnelling and segment assembling. The results showed that the control accuracy of the hydro-cylinder pressures of the shield propulsion system was high, and the total thrust force was controlled within ± 3% of the target value; at the moment of segment assembly, the shield attitudes and propulsion speeds suddenly changed due to the limitation of the response time of the hydro-cylinder pressures, and both would return to the initial values in the full-cylinder propulsion mode; the segment structure had sufficient compressive capacity, and the utilization rate of the compressive strength was only 61.2%.
Abstract：
To greatly improve the shield construction efficiency and reduce the construction cost, a synchronous technology combining shield tunnelling and segment assembling was proposed through the active control of the oil pressures of the shield propulsion system, and a total thrust force control method based on the principle of maximum pressure redundancy was built. Then, the whole system was tested and verified on the large-scale model test platform for synchronous technology combining shield tunnelling and segment assembling. The results showed that the control accuracy of the hydro-cylinder pressures of the shield propulsion system was high, and the total thrust force was controlled within ± 3% of the target value; at the moment of segment assembly, the shield attitudes and propulsion speeds suddenly changed due to the limitation of the response time of the hydro-cylinder pressures, and both would return to the initial values in the full-cylinder propulsion mode; the segment structure had sufficient compressive capacity, and the utilization rate of the compressive strength was only 61.2%.
YUAN Xianghua1,
2 ZHU Yanfei1 ZHU Yeting1,
2
.Test Verification of Synchronous Technology Combining Shield Tunnelling with Segment Assembling Based on the Principle of Maximum Pressure Redundancy[J] MODERN TUNNELLING TECHNOLOGY, 2022,V59(6): 106-113
2022, Vol. 59 