基于最大压力冗余原则的盾构推拼同步技术试验验证

Test Verification of Synchronous Technology Combining Shield Tunnelling with Segment Assembling Based on the Principle of Maximum Pressure Redundancy

以提高盾构施工效率、降低施工成本为目标,提出一种通过对盾构推进系统油压进行主动控制的推拼同步技术,给出以最大压力冗余为原则的总推力控制方法,并基于大型盾构推拼同步技术模型试验平台对全系统进行试验验证。结果表明:盾构推进系统油缸压力控制精度高,总推力控制在目标值±3%范围内;进入管片拼装的瞬间盾构姿态和推进速度受推进油缸响应时长影响,表现出突变的特征,进入全油缸推进模式后两者都将恢复到初值;管片结构抗压能力充分,抗压强度利用率为61.2%。

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%.