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Effect of cutterhead rotational speed on mudstone argillization during the tunneling process
https://orcid.org/0000-0003-0427-1898
Abstract Construction projects are adversely affected by the argillization effect when the tunnel boring machine (TBM) excavates in the mudstone stratum. Improper tunneling parameters and complicated geological conditions are two of the many factors that might cause argillization. Among them, the reasonable rotational speed of cutterhead in the tunneling parameters is essential for lowering the argillization effect of disc cutter. To investigate the effect of cutterhead rotational speed on argillization effect, a miniature TBM rotary cutting test system was performed on mudstone samples with different cutterhead rotational speeds. The failure characteristics of mudstone and the microstructure of slaking mudstone were observed under different rotational speeds of the cutterhead. According to experimental results, the argillization effect of cutterhead is mainly caused by the destruction of the particle skeleton-clay flocculation structure in mudstone. By comparison, it observed that there is a negative association between the content of slaking mudstone adhered to disc cutter and the cutterhead rotational speed. However, the excessive rotational speed of cutterhead leads to severe eccentric wear of disc cutter. Therefore, argillization effect can be weakened by increasing the rotational speed of cutterhead properly. In the engineering application, the linear velocity of the central cutterhead, whose installation radius of disc cutter is less than 2 m, should be adjusted to approximately 0.58 m/s. The present study provides a theoretical reference for determining reasonable cutterhead rotational speed, which is favorable to the improvement of tunneling efficiency.
Effect of cutterhead rotational speed on mudstone argillization during the tunneling process
https://orcid.org/0000-0003-0427-1898
Abstract Construction projects are adversely affected by the argillization effect when the tunnel boring machine (TBM) excavates in the mudstone stratum. Improper tunneling parameters and complicated geological conditions are two of the many factors that might cause argillization. Among them, the reasonable rotational speed of cutterhead in the tunneling parameters is essential for lowering the argillization effect of disc cutter. To investigate the effect of cutterhead rotational speed on argillization effect, a miniature TBM rotary cutting test system was performed on mudstone samples with different cutterhead rotational speeds. The failure characteristics of mudstone and the microstructure of slaking mudstone were observed under different rotational speeds of the cutterhead. According to experimental results, the argillization effect of cutterhead is mainly caused by the destruction of the particle skeleton-clay flocculation structure in mudstone. By comparison, it observed that there is a negative association between the content of slaking mudstone adhered to disc cutter and the cutterhead rotational speed. However, the excessive rotational speed of cutterhead leads to severe eccentric wear of disc cutter. Therefore, argillization effect can be weakened by increasing the rotational speed of cutterhead properly. In the engineering application, the linear velocity of the central cutterhead, whose installation radius of disc cutter is less than 2 m, should be adjusted to approximately 0.58 m/s. The present study provides a theoretical reference for determining reasonable cutterhead rotational speed, which is favorable to the improvement of tunneling efficiency.
Effect of cutterhead rotational speed on mudstone argillization during the tunneling process
https://orcid.org/0000-0003-0427-1898
Abstract Construction projects are adversely affected by the argillization effect when the tunnel boring machine (TBM) excavates in the mudstone stratum. Improper tunneling parameters and complicated geological conditions are two of the many factors that might cause argillization. Among them, the reasonable rotational speed of cutterhead in the tunneling parameters is essential for lowering the argillization effect of disc cutter. To investigate the effect of cutterhead rotational speed on argillization effect, a miniature TBM rotary cutting test system was performed on mudstone samples with different cutterhead rotational speeds. The failure characteristics of mudstone and the microstructure of slaking mudstone were observed under different rotational speeds of the cutterhead. According to experimental results, the argillization effect of cutterhead is mainly caused by the destruction of the particle skeleton-clay flocculation structure in mudstone. By comparison, it observed that there is a negative association between the content of slaking mudstone adhered to disc cutter and the cutterhead rotational speed. However, the excessive rotational speed of cutterhead leads to severe eccentric wear of disc cutter. Therefore, argillization effect can be weakened by increasing the rotational speed of cutterhead properly. In the engineering application, the linear velocity of the central cutterhead, whose installation radius of disc cutter is less than 2 m, should be adjusted to approximately 0.58 m/s. The present study provides a theoretical reference for determining reasonable cutterhead rotational speed, which is favorable to the improvement of tunneling efficiency.
Effect of cutterhead rotational speed on mudstone argillization during the tunneling process
Yang, Haiqing (author) / He, Hui (author) / Chen, Chiwei (author)
2023
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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