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Study on Thrust Vector Control Method for Shield Synchronous Propulsion and Assembly Based on Thrust Uniformity
(1. China Railway 14th Bureau Group Co., Ltd., Jinan 250000; 2. China Railway 14th Bureau Group Mage Shield Construction Co., Ltd., Nanjing 210000；3. CCTEB Infrastructure Conseruction Investment Co., Ltd., Wuhan 430061)
Abstract To achieve precise control of shield attitude during the synchronous propulsion and assembly process, a study was conducted on the construction efficiency and thrust vector control method of shield synchronous propulsion and assembly, based on the Nantong-Suzhou-Jiaxing-Ningbo High-speed Railway. A thrust calculation model based on segmented lining and a thrust vector allocation method based on thrust uniformity were proposed. The effects of total thrust magnitude, thrust eccentric direction, and eccentric distance on the thrust of each cylinder were analyzed. The results indicate that, under constant tunnelling speed, assembly speed, and segment width, the cylinder stroke is the key factor affecting the efficiency of synchronous propulsion and assembly. Theoretically, the half-syn?chronous propulsion and assembly mode can improve efficiency by over 21%, while the full-synchronous mode can increase it by 47%. The thrust of each cylinder initially increases linearly with the total thrust and changes non-linearly with periodic variation as the eccentric direction varies. The thrust of the cylinders on the same side as the eccentric direction increases linearly with the eccentric distance, while the thrust of the cylinders on the opposite side decreases linearly, maintaining a constant combined force. Compared to the conventional propulsion and assembly mode, the proposed synchronous propulsion and assembly algorithm model significantly improves computational efficiency while ensuring accuracy, aligning with the concept of cylinder partition control.
Abstract：
To achieve precise control of shield attitude during the synchronous propulsion and assembly process, a study was conducted on the construction efficiency and thrust vector control method of shield synchronous propulsion and assembly, based on the Nantong-Suzhou-Jiaxing-Ningbo High-speed Railway. A thrust calculation model based on segmented lining and a thrust vector allocation method based on thrust uniformity were proposed. The effects of total thrust magnitude, thrust eccentric direction, and eccentric distance on the thrust of each cylinder were analyzed. The results indicate that, under constant tunnelling speed, assembly speed, and segment width, the cylinder stroke is the key factor affecting the efficiency of synchronous propulsion and assembly. Theoretically, the half-syn?chronous propulsion and assembly mode can improve efficiency by over 21%, while the full-synchronous mode can increase it by 47%. The thrust of each cylinder initially increases linearly with the total thrust and changes non-linearly with periodic variation as the eccentric direction varies. The thrust of the cylinders on the same side as the eccentric direction increases linearly with the eccentric distance, while the thrust of the cylinders on the opposite side decreases linearly, maintaining a constant combined force. Compared to the conventional propulsion and assembly mode, the proposed synchronous propulsion and assembly algorithm model significantly improves computational efficiency while ensuring accuracy, aligning with the concept of cylinder partition control.
LIU Sijin1 SHI Linken1 WEI Yingjie1 WANG Huawei1 DU Jikai2 WANG Jun1 YU Yunxiang1 ZHU Lin3
.Study on Thrust Vector Control Method for Shield Synchronous Propulsion and Assembly Based on Thrust Uniformity[J] MODERN TUNNELLING TECHNOLOGY, 2024,V61(5): 10-20
2024, Vol. 61 