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| Failure analysis of the disc cutters of TBM in a subway project |
| LU Qingliang, YUAN Naiqiang
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| Jinan Heavy Industries Group Co., Ltd., Jinan 250002, Shandong, China |
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Abstract With development of railway transportation, shield tunneling technology has been widely used. As a key component of shield tunneling, the working efficiency and failure form of hob were directly related to the geological conditions and had an important influence on construction schedule and safety. Based on a subway tunneling project, its geology related was analyzed firstly, then the failure types and corresponding causes of the disc cutters were also explained. Finally, a brief discussion was given about the material properties of disc cutters. The results showed that the failure forms were mainly partial grinding, edge curl, fracture of disc cutter ring, cutter ring off, fracture of cutter shaft.
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Published: 04 November 2020
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