804117 Factors influencing the performance of full-face, hard rock tunnel boring machines

1980 ◽  
Vol 17 (4) ◽  
pp. A67
Keyword(s):  
Hard Rock ◽  
Tunnel Boring Machines ◽  
Tunnel Boring ◽  
Factors Influencing ◽  
Boring Machines ◽  
Full Face ◽  
Rock Tunnel

Research on the Load on Cutter Head of Hard Rock Tunnel Boring Machine

2014 ◽  
Vol 684 ◽  
pp. 303-307 ◽  
Author(s):  
Xiao Xu Zhao ◽  
Ya Dong Gong
Keyword(s):  
Hard Rock ◽  
Rolling Force ◽  
Tunnel Boring Machine ◽  
Tunnel Boring Machines ◽  
Tunnel Boring ◽  
Particle Hydrodynamics ◽  
Boring Machines ◽  
And Performance ◽  
Rock Tunnel ◽  
Cutter Head

Study on the load exerted on cutter head is very useful for the design and performance prediction of hard rock tunnel boring machines. A composite model based on smoothed particle hydrodynamics and finite element method was carried out using AUTODYN software to study the rock fragmentation mechanism of constant cross-section disk cutters in cutter head. The normal force, rolling force and side force on the disk cutters with different cutter radius were researched in the numerical simulation study. The results were verified by historical literature data. To obtain the distribution of the forces with different cutter radius, the loading of cutter head of a Ф5.75 hard rock tunnel boring machine were analyzed. The result shows that it is useful for cutter head’s design and its layout optimization.

scholarly journals The Preparation of H13 Steel for TBM Cutter and the Performance Test Close to Working Condition

2018 ◽  
Vol 8 (10) ◽  
pp. 1877 ◽  
Author(s):  
Yong Hu ◽  
Jiyu Tian ◽  
Mingxu Xu ◽  
Hongwei Zhao ◽  
Mingze Wang ◽  
...  
Keyword(s):  
Compression Strength ◽  
Performance Test ◽  
Working Condition ◽  
H13 Steel ◽  
Tunnel Boring Machines ◽  
Tunnel Boring ◽  
Disc Cutters ◽  
Boring Machines ◽  
Full Face ◽  
Tbm Cutter

The material of disc cutters is important to full-face tunnel boring machines (TBM). In recent years, disc cutters were optimized and tested by many scholars all around the world. H13(4Cr5MoSiV1) steel is widely used due to its excellent properties, especially in TBM disc cutters. In this paper, H13 steel with optimized composition was prepared and heat treatment. The high temperature compression of H13 steel was conducted at the temperatures ranging from 100 °C to 700 °C, with strain rate at 0.01 s−1. The stress-strain curves, Rockwell hardness and microstructure of H13 steel after compression were obtained and analyzed. The results showed that the compression strength and hardness decreased as the temperature increased; and the compression strength, hardness and ductility decreased rapidly between 600 °C and 700 °C, HR700 (the hardness of H13 steel at 700 °C) only reached 33.23 HRC. It is not recommended for TBM disc cutters to work in an environment over 600 °C.

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