Fatigue Reliability and Optimal Design Research of TBM Cutter

2011 ◽  
Vol 328-330 ◽  
pp. 18-21
Author(s):  
Zhao Qian Wang ◽  
Tian Biao Yu ◽  
Ye Zou ◽  
Chang Xin Wang ◽  
Hai Feng Zhao ◽  
...  
Keyword(s):  
Design Research ◽  
Tunnel Boring Machine ◽  
Soil Conditions ◽  
Fatigue Reliability ◽  
Element Analysis ◽  
Tunnel Boring ◽  
Actual Design ◽  
Cad Models ◽  
Product Manufacturing ◽  
Tbm Cutter

Tools of tunnel boring machine CAD models have been built by CAD software, it is analyzed static characteristics and fatigue characteristics by finite element analysis and obtaining the displacement in the poor stiffness conditions. Improving its structure to strengthen stiffness and fatigue life by the calculate result. The final result shows that the structure can satisfy its rigid command and can fit the soil conditions above 5%-10%. Damage frequency of tools is greatly deduced. It provides a theoretical basis for the actual design and product manufacturing.

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 Influence of Tunnel Boring Machine (TBM) Advance on Adjacent Tunnel during Ultra-Rapid Underground Pass (URUP) Tunneling: A Case Study and Numerical Investigation

2020 ◽  
Vol 10 (11) ◽  
pp. 3746
Author(s):  
Chao Liu ◽  
Zhuohua Peng ◽  
Liufeng Pan ◽  
Hai Liu ◽  
Yubing Yang ◽  
...  
Keyword(s):  
Earth Pressure ◽  
Bending Moment ◽  
Tunnel Boring Machine ◽  
Soil Arching ◽  
Tunnel Face ◽  
Element Analysis ◽  
Tunnel Boring ◽  
Supporting Pressure ◽  
Grouting Pressure ◽  
The Face

This study investigates the influence of subsequent tunnel boring machine (TBM)-driven processes on the responses of the first tunnel in twin-tunnel construction using the ultra-rapid underground pass (URUP) method. A comprehensive finite element analysis (FEA) is performed to simulate the URUP TBM tunneling, considering the non-uniform convergence caused by the TBM geometry, the tunnel face supporting pressure, and the tail-grouting pressure. The FEA model is validated by the monitoring results of the bending element of the first tunnel lining. The FEA results reveal that the grouting pressure of the second tunnel has significant influence on lining deformation of the first tunnel, while the face supporting pressure shows little effect. The relationship between the grouting pressure and the maximum bending moment of adjacent first tunnel can be fitted by linear function. A grouting pressure equals to the lateral earth pressure is able the reduce the variation of the bending element of the first tunnel during the TBM-driven process of the second tunnel. The bending element of the first tunnel shows a typical lognormal relationship with the face supporting pressure during the TBM advance of the second tunnel. A critical cover-to-depth ratio, under which the horizontal and vertical soil arching effect vanishes, can be deduced to be within the range of 0.55–0.60.

Development of a Digital Mockup for Tunnel Boring Machine

2009 ◽  
Vol 16-19 ◽  
pp. 769-775
Author(s):  
Jun Cheng ◽  
Ya Dong Gong ◽  
Ying Qiang Xu ◽  
Di Zhi
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Tunnel Boring Machine ◽  
Element Analysis ◽  
Tunnel Boring ◽  
Kinematics Simulation ◽  
Digital Mockup

Technology of digital mockup is introduced and the application background and practical requirement of tunnel boring machine has been discussed in this paper. One type of EPB tunnel boring machine’s digital mockup is built. The kinematics simulation of working station is disigned base on it. And finite element analysis of some critical componants are operated in CATIA.

scholarly journals Effect of Tunnel Progress on the Settlement of Existing Piled Foundation

2019 ◽  
Vol 41 (2) ◽  
pp. 102-113 ◽  
Author(s):  
Raid Ramzi Al-Omari ◽  
Madhat Shakir Al-Soud ◽  
Osamah Ibrahim Al-Zuhairi
Keyword(s):  
Ground Deformation ◽  
Three Dimensional ◽  
Ground Surface ◽  
Tunnel Boring Machine ◽  
Longitudinal Direction ◽  
Tunnel Lining ◽  
Elastic Model ◽  
Element Analysis ◽  
Tunnel Boring ◽  
Three Dimensional Finite Element

AbstractTunnel construction below or adjacent to piles will affect the performance and eventually the stability of piles due to ground deformation resulting in the movement of piles and changes in the axial force distribution along the piles. A three dimensional finite element analysis using PLAXIS 3D (2013) was performed to study the behaviour of a single pile and 3 x 3 piles group during the advancement of shield tunnelling in ground. The 10-node tetrahedral elements were used to model both the soil and the tunnel lining. The Hardening Soil (HS) model was used to simulate the soil structure interaction at the tunnel-soil interface. An isotropic elastic model was used for the pile, piles cap, tunnel lining and tunnel boring machine shield (TBM). Several parametric studies were attempted including the longitudinal, lateral, and vertical tunnel location relative to pile embedded in different types of soil (clay or sand). The results showed that the pile head settlement increases during the tunnelling advancement in larger values than that for ground surface settlement. A zone of influence was determined in the range of twice the tunnel diameter in the longitudinal direction (forward and backward of the pile), and transverse direction (left and right of the tunnel centreline). If the tunnel boring is kept off this zone then there is no fear of pile collapse.

Transient Property Improvement of Hydraulic Cylinder Control for Tunnel Boring Machine Using Opposite Reference Filter

2020 ◽  
Vol 140 (3) ◽  
pp. 320-325
Author(s):  
Yoshihiro Ohnishi ◽  
Takahisa Shigematsu ◽  
Takuma Kawai ◽  
Shinichi Kawamura ◽  
Noboru Oda
Keyword(s):  
Tunnel Boring Machine ◽  
Hydraulic Cylinder ◽  
Tunnel Boring

Integral hoisting technology of tunnel boring machine in limited space

2016 ◽  
Vol 33 (3) ◽  
pp. 317
Author(s):  
Fei Wang ◽  
Mengbo Liu ◽  
Long Chen ◽  
Wen Liu ◽  
Linmeng Tang
Keyword(s):  
Tunnel Boring Machine ◽  
Tunnel Boring ◽  
Limited Space
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