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Cutting tool wear model for tunnel boring machine tunneling in heterogeneous grounds
Abstract Cutting tool wear in tunnel boring machine (TBM) affects the construction safety, time, and cost in tunneling engineering. To accurately calculate the wear of TBM cutting tools used in heterogeneous grounds, the wear coefficient was studied theoretically and using field experiments based on the tool wear model proposed by the Japanese Tunnelling Society (JTS). A trajectory weight-based wear coefficient was proposed along with a calculation method that enhanced the model’s adaptability to heterogeneous grounds. The conclusions were as follows: (1) The wear coefficients for cutting tools installed at different installation radii had to be calculated separately due to their dissimilar values in heterogeneous grounds. (2) Analysis of measured data proved that the distribution of strata in the excavation area, the wear coefficient of each ground, and the cutting tools installation radius all significantly influenced the heterogeneous ground wear coefficient. A comparison of results obtained using different calculation models showed that the model proposed in this paper was more suitable for the calculation of tool wear in heterogeneous soil strata. (3) When the JTS model and its optimization model were used, the wear of high and low cutting tools had to be calculated separately due to dissimilar wear. (4) Based on the example analyses, the wear coefficients for high rippers were 102.31–113.73 μm/km, for low rippers were 35.94–42.55 μm/km, and for scrapers were 38.60–40.34 μm/km. The wear coefficient of the low ripper and scraper was approximately 40% of that of the high ripper, and the correction coefficient for the outermost scraper and ripper was 1.2–1.4 and 2–3, respectively.
Cutting tool wear model for tunnel boring machine tunneling in heterogeneous grounds
Abstract Cutting tool wear in tunnel boring machine (TBM) affects the construction safety, time, and cost in tunneling engineering. To accurately calculate the wear of TBM cutting tools used in heterogeneous grounds, the wear coefficient was studied theoretically and using field experiments based on the tool wear model proposed by the Japanese Tunnelling Society (JTS). A trajectory weight-based wear coefficient was proposed along with a calculation method that enhanced the model’s adaptability to heterogeneous grounds. The conclusions were as follows: (1) The wear coefficients for cutting tools installed at different installation radii had to be calculated separately due to their dissimilar values in heterogeneous grounds. (2) Analysis of measured data proved that the distribution of strata in the excavation area, the wear coefficient of each ground, and the cutting tools installation radius all significantly influenced the heterogeneous ground wear coefficient. A comparison of results obtained using different calculation models showed that the model proposed in this paper was more suitable for the calculation of tool wear in heterogeneous soil strata. (3) When the JTS model and its optimization model were used, the wear of high and low cutting tools had to be calculated separately due to dissimilar wear. (4) Based on the example analyses, the wear coefficients for high rippers were 102.31–113.73 μm/km, for low rippers were 35.94–42.55 μm/km, and for scrapers were 38.60–40.34 μm/km. The wear coefficient of the low ripper and scraper was approximately 40% of that of the high ripper, and the correction coefficient for the outermost scraper and ripper was 1.2–1.4 and 2–3, respectively.
Cutting tool wear model for tunnel boring machine tunneling in heterogeneous grounds
Yang, Zhiyong (author) / Sun, Zhengyang (author) / Fang, Kuanda (author) / Jiang, Yusheng (author) / Gao, Hongji (author) / Bai, Zhiqiang (author)
2021
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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