Modelling and simulation of surfacing welding remanufacturing for tunnel boring machine disc cutter

2021 ◽  
pp. 1-17
Author(s):  
Julius Caesar Puoza ◽  
Felix Uba
Keyword(s):  
Tunnel Boring Machine ◽  
Modelling And Simulation ◽  
Disc Cutter ◽  
Tunnel Boring

Research on the Rock Breaking by Double Disc Cutter Test-Bed

2013 ◽  
Vol 690-693 ◽  
pp. 2484-2489 ◽  
Author(s):  
Peng Zhou ◽  
Chao Wang ◽  
Wei Xian Gao ◽  
Yu Hou Wu
Keyword(s):  
Maximum Stress ◽  
Tunnel Boring Machine ◽  
Rock Breaking ◽  
Disc Cutter ◽  
Test Bed ◽  
Underground Engineering ◽  
Tunnel Boring ◽  
Disc Cutters ◽  
Optimal Spacing ◽  
Rock Tunnel

Rock tunnel boring machine is one of the main machineries and equipments for underground engineering, and the failure of tool systems is its main failure form. Rock hob test-bed is the only testing equipment for tool failure and wear. In this paper, the breaking rock by the double disc cutter is simulated and four kinds of rocks are selected to test the influece of rock characteristics and spacing between two disc cutters on the rock breaking by the double disc cutter test-bed. The results show that there is different optimal spacing between two disc cutters for different rock; the optimal spacing is inversely proportional to the hardness of the rocks; the maximum stress appears the boundary between the disc cutter and rock.

Development of a Disc Cutter Wear Inspection Robot for a Tunnel Boring Machine

2018 ◽  
Vol 2018 (0) ◽  
pp. 2A1-D02
Author(s):  
Rui FUKUI ◽  
Yudai YAMADA ◽  
Katsuya SANO ◽  
Shin'ichi WARISAWA ◽  
Eiichi MORIOKA ◽  
...  
Keyword(s):  
Tunnel Boring Machine ◽  
Disc Cutter ◽  
Inspection Robot ◽  
Tunnel Boring ◽  
Cutter Wear ◽  
Disc Cutter Wear

Numerical Simulation of Rock-Breaking Process by Disc Cutter in Tunnel Boring Machine

2014 ◽  
Vol 487 ◽  
pp. 513-516 ◽  
Author(s):  
Yu Zhang ◽  
Xing Wen Wang ◽  
Hui Fang Liu
Keyword(s):  
Working Life ◽  
Tunnel Boring Machine ◽  
Dynamic Contact ◽  
Negative Influence ◽  
Rock Breaking ◽  
Disc Cutter ◽  
Element Analysis ◽  
Tunnel Boring ◽  
Stress Load ◽  
Rule Dynamics

The force load research of disc cutter can be used in the design of disc cutter, in order to improve the working life, determine when to change another cutter. Based on the working platform of ABAQUS finite element analysis module, single disc cutter rock-breaking of the simulation model is established, and according to the theory of rocks plastic rule, dynamics analysis and dynamic simulation are done when the cutter is in rock-breaking process by which, the added force can be got when the disc cutter and rocks contact each other in different wear conditions of contact force in the process of the dynamic contact each other. The results show that with the cutter damage increasing, the added force is increased and cutters maximum instantaneous stress load is 1.5 ~ 2.5 times than the average stress load, which has a negative influence on working efficiency. To have a clear understand of cutters design and working life and when to change another cutter in working time, the results also offer an engineering parameters for researching the load state of TBM tunneling.

A Method to Predict Disc Cutter Specific Energy for TBM Based on CSM Model

2012 ◽  
Vol 236-237 ◽  
pp. 414-417
Author(s):  
Gang Li ◽  
Li Da Zhu ◽  
Jian Yu Yang ◽  
Wan Shan Wang
Keyword(s):  
Specific Energy ◽  
Performance Prediction ◽  
Dynamic Models ◽  
Tunnel Boring Machine ◽  
Disc Cutter ◽  
Energy Prediction ◽  
Tunnel Boring ◽  
Csm Model ◽  
Tbm Cutter ◽  
Cutter Head

By using fracture mechanics theory of rock, the rock fragmentation mechanism of tunnel boring machine (TBM) cutters is analyzed and the analysis of forces of cutter is carried out. A new method to predict disc cutter specific energy for TBM is developed in this study. By using the dynamic models of TBM cutters interaction with the rock, specific energy prediction model for TBM cutter head is developed. The data from the actual tunnel construction is analyzed by using an example of Qinling tunnel and the comparison is made with the field data. The results indicate that the model developed in this study could not only replace the experiment to disc cutter specific energy for TBM, but also provide a theoretical basis for the performance prediction and optimal design of cutter head for TBM.

scholarly journals Using a high-pressure water jet-assisted tunnel boring machine to break rock

2020 ◽  
Vol 12 (10) ◽  
pp. 168781402096229
Author(s):  
Jinliang Zhang ◽  
Yongchang Li ◽  
Yuansheng Zhang ◽  
Fengwei Yang ◽  
Chao Liang ◽  
...  
Keyword(s):  
High Pressure ◽  
Tunnel Boring Machine ◽  
Rock Breaking ◽  
Water Jet ◽  
Water Diversion ◽  
Disc Cutter ◽  
Tunnel Boring ◽  
Water Jets ◽  
Pressure Water ◽  
High Pressure Water Jet

The concept of tunnel boring machine (TBM) disc cutter rock breaking coupled with high-pressure water jets has been proposed to overcome the difficulties that occur when TBMs encounter extremely hard rocks. Thus, to meet actual engineering requirements for the TBM construction of tunnels as part of the Wan’anxi water diversion project in Longyan City (Fujian Province, China), experiments were conducted on high-pressure water jet-assisted TBM disc cutter rock breaking. By varying kerf depth and width under different water jet parameters and performing disc cutter rock breaking tests on rock surfaces with no kerf, single kerf, and double kerfs, the effects of different kerf depths on the disc cutter rock breaking process, load, and efficiency were examined. The test results showed that high-pressure water jets can generate the regular kerfs required for the coupled disc cutter rock breaking of granite. Employing the coupled rock breaking method also resulted in a decrease in specific energy and an approximately 40% decrease in the normal force of the disc cutter, thereby significantly improving rock breaking efficiency. These results provide key technical parameters for the design and manufacture of high-pressure water jet-assisted rock-breaking TBMs and serves as a reference for similar processes.

Design and Simulation of the Hydraulic System for the Disc Cutter of the Rock Hob Test-Bed

2012 ◽  
Vol 499 ◽  
pp. 51-55
Author(s):  
Yu Hou Wu ◽  
Jian Sun ◽  
Hong Sun ◽  
Albert J. Shih ◽  
X.Q. Zhao
Keyword(s):  
Flow Rate ◽  
Hydraulic System ◽  
Tunnel Boring Machine ◽  
Vertical Movement ◽  
Movement Speed ◽  
Disc Cutter ◽  
Test Bed ◽  
Hydraulic Oil ◽  
Tunnel Boring ◽  
Rock Tunnel

Rock tunnel boring machine is one of the main machineries and equipments for underground engineering, and the failure of its disc cutter is the main failure form of this machinery. The experiment on the failure and wear of the disc cutter is difficult. In this paper, a rock hob test-bed is designed, and the hydraulic-driven system of its disc cutter of rock hob test-bed is simulated; the effect of load and flow rate of hydraulic oil in this hydraulic system on characteristics of this disc cutter system is analyzed. The results show that the vertical movement speed of disc cutter is directly proportional to the flow rate; the effect of the load on this speed and the vertical pressure can be ignored; the delay time of the movement of the disc cutter to the flow rate of hydraulic oil is proportional to the load. These results are very helpful to the structure optimization of disc cutter system of rock tunnel boring machine and the improvement of working efficiency.

Numerical Simulation of Rock Breaking by Disc Cutter of Tunnel Boring Machine

2014 ◽  
Vol 638-640 ◽  
pp. 888-893
Author(s):  
Qi Xing Wu ◽  
Guang Feng An ◽  
Xiao Wen Zhou ◽  
Lin Chen
Keyword(s):  
Finite Element ◽  
Numerical Technique ◽  
Nonlinear Dynamic Analysis ◽  
Tunnel Boring Machine ◽  
Element Model ◽  
Rock Breaking ◽  
Elastic Behavior ◽  
Disc Cutter ◽  
Three Dimension ◽  
Tunnel Boring

By using the explicit nonlinear dynamic analysis program of LS-DYNA, three-dimension finite element model of rock breaking by disc cutter of tunnel boring machine is established, in which elastic material is adopted to describe the elastic behavior of cutter ring and Holmguist Johnson Concrete (HJC) model is adopted to describe the brittle behavior of rock. With the finite element method, the process of rock breaking by disc cutter is simulated, and then the movement characteristics, forces of disc cutter and rock fragmentation mechanism are analyzed. The results indicate that the numerical technique can contribute to gaining an understanding of rock breaking mechanism by disc cutter and improving the design of disc cutter parameters.

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