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| Analysis on wearing of cuttering tools of slurry shield machines in soil-rock composite strata used in cross-river section of Wuhan Metro Line 8 |
| WU Yankun1,2, ZHOU Shihan3, CHEN Jian2, HUANG Xingkai3, MIN Fanlu2,3*
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1. School of Civil Engineering, Tsinghua University, Beijing 100084, China;
2. China Railway 14th Construction Bureau Co., Ltd., Jinan 250014, Shandong, China;
3. College of Civil and Transportation Engineering, Hohai University, Nanjing 210098, Jiangsu, China |
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Abstract When the Yuejiang section of Wuhan Metro Line 8 used the mud-water shield construction method to cross the soft and hard soil-rock composite stratum, the serious tool wear had become an important problem affecting the progress of the project. Through the statistics of the wear data of the typical tool of the engineering shield, the wear coefficient and tool change were used to analyze the adaptability of different types of tools in different layers in different layers. The results showed that, entering the soil-rock composite stratum, the tool was severely worn, and the tooth cutter and the front tearing tool were not suitable for cutting the stratum. after the hob was replaced, the tool wear was still serious, mostly due to uneven wear, chip ring cracking and other abnormal wear; traditional tools. The calculation formula of wear coefficient was not suitable for calculation when the tool was extremely worn. Carrying out research on tool alloy materials and developing new tough tools that are more resistant to impact may be the direction to solve this problem.
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Received: 18 July 2020
Published: 20 September 2020
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