Key Techniques for Construction of Sanyang Road Cross riverTunnel of Wuhan Rail Transit Line 7(武汉轨道交通7号线三阳路越江隧道施工关键技术) |
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引用本文: | LI Bo,BAO Zhen.Key Techniques for Construction of Sanyang Road Cross riverTunnel of Wuhan Rail Transit Line 7(武汉轨道交通7号线三阳路越江隧道施工关键技术)[J].隧道建设,2019,39(5):820-831. |
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作者姓名: | LI Bo BAO Zhen |
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作者单位: | (Shanghai Tunnel Engineering Co., Ltd., Shanghai 200032, China) |
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摘 要: | The author focuse on the great challenges encountered during the tunneling process in the Wuhan Sanyang Road Tunnel, and the key techniques adopted to solve those problems. When tunneling in composite strata, engineers inevitably face problems such as inefficient excavation, excessive tool wear, excavation face instability and the risk of clogging. The TBM used in the project allows tool change under atmospheric pressure, which improves the efficiency of tool change and eliminated the risk of casualties during hyperbaric interventions. In terms of the tool wear and clogging, the authors propose technical solutions as follows: the optimization of the tool′s type and configuration, improvement of the central flushing system and chemical dissolution of clogging. The results indicate that through the countermeasures proposed, the tunneling efficiency can be improved effectively. They also reduce the cutter change frequency and eliminate the risk of TBM downtime. The technical achievements obtained in the construction of the Wuhan Sanyang Road Tunnel can provide technical reference for the construction of large diameter shield tunnels in composite strata in the future.
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关 键 词: | Tunnel composite strata large diameter TBM tool change under atmospheric pressure central flushing |
收稿时间: | 2019-01-16 |
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