Case-based Reasoning Approach for Cutterhead Principal Parameter Design of Full Face Rock Tunnel Boring Machine

2010 ◽  
Vol 46 (03) ◽  
pp. 158 ◽  
Author(s):  
Zhijie LIU
Keyword(s):  
Tunnel Boring Machine ◽  
Parameter Design ◽  
Case Based Reasoning ◽  
Principal Parameter ◽  
Tunnel Boring ◽  
Full Face ◽  
Rock Tunnel ◽  
Case Based

The Crushing Mode and the Optimal Penetration of Two Disc Cutters Cutting Marble under Different Confining Stress

2013 ◽  
Vol 353-356 ◽  
pp. 1417-1421 ◽  
Author(s):  
Bin Shen ◽  
Yi Min Xia ◽  
Jian Jian Gu ◽  
Yan Chao Tian
Keyword(s):  
Energy Consumption ◽  
Specific Energy ◽  
Specific Energy Consumption ◽  
Tunnel Boring Machine ◽  
Element Model ◽  
Confining Stress ◽  
Tunnel Boring ◽  
Disc Cutters ◽  
Full Face ◽  
Rock Tunnel

According to the actual working condition of the full face hard rock tunnel boring machine (TBM), a 2-D discrete element model for breaking marble by two TBM disc cutters is established, it simulates the whole progress of cracks production and propagation under different confining stress and penetration; based on CSM prediction model, forces of two cutters and specific energy consumptions are calculated to determine the best penetration. The simulating result shows that there are three kinds of breaking modes of marble under different confining stress and penetration; As well as the trend that specific energy consumption decrease first and then increase with the penetration increases, and there is optimal penetration to make specific energy consumption the lowest each confining stress. The optimal penetration and the lowest specific energy consumption are determined when confining stress range from 0 to 40MPa according to the simulation results.

scholarly journals On the Loads for Strength Design of Cutterhead of Full Face Rock Tunnel Boring Machine

2019 ◽  
Vol 32 (1) ◽  
Author(s):  
Meidong Han ◽  
Zongxi Cai ◽  
Chuanyong Qu
Keyword(s):  
Three Dimensional ◽  
Influence Factors ◽  
Tunnel Boring Machine ◽  
Element Model ◽  
Rock Breaking ◽  
Strength Properties ◽  
Tunnel Boring ◽  
Strength Design ◽  
Full Face ◽  
Rock Tunnel

AbstractCutterhead loads are the key mechanical parameters for the strength design of the full face hard rock tunnel boring machine (TBM). Due to the brittle rock-breaking mechanism, the excavation loads acting on cutters fluctuate strongly and show some randomness. The conventional method that using combinations of some special static loads to perform the strength design of TBM cutterhead may lead to strength failure during working practice. In this paper, a three-dimensional finite element model for coupled Cutterhead–Rock is developed to determine the cutterhead loads. Then the distribution characteristics and the influence factors of cutterhead loads are analyzed based on the numerical results. It is found that, as time changes, the normal and tangential forces acting on cutters and the total torque acting on the cutterhead approximately distribute log normally, while the total thrusts acting on the cutterhead approximately show a normal distribution. Furthermore, the statistical average values of cutterhead loads are proportional to the uniaxial compressive strength (UCS) of cutting rocks. The values also change with the penetration and the diameter of cutterhead following a power function. Based on these findings, we propose a three-parameter model for the mean of cutterhead loads and a method of generating the random cutter forces. Then the strength properties of a typical cutterhead are analyzed in detail using loads generated by the new method. The optimized cutterhead has been successfully applied in engineering. The method in this paper may provide a useful reference for the strength design of TBM cutterhead.

Analysis on the Stress and Failures of Disc Cutter of Full Face Rock Tunnel Boring Machine

2010 ◽  
Vol 102-104 ◽  
pp. 223-226 ◽  
Author(s):  
Teng Yue Wang ◽  
Ke Zhang ◽  
Hong Sun ◽  
Yu Hou Wu ◽  
Kai Jun Zhao
Keyword(s):  
Stress Distribution ◽  
Failure Modes ◽  
Tunnel Boring Machine ◽  
Paper Analysis ◽  
Disc Cutter ◽  
Tunnel Boring ◽  
Disc Cutters ◽  
Low Efficiency ◽  
Full Face ◽  
Rock Tunnel

Full face rock tunnel boring machine (TBM) plays an important role in boring rock of tunnel. The failure of disc cutter is the main reason leading to low efficiency of TBM. In this paper, analysis of force and motion for disc cutter are carried by using ABAQUS to study stress distribution and concentration in disc cutter and rocks. Influence of different rocks on stress in disc cutter is analyzed. By combination the failure modes of disc cutter and its stress distribution, methods of decreasing failures of disc cutter are presented. Wear resistance and service life of disc cutter are improved by matching the materials of disc cutters with rocks. The results are useful for structural optimization and strengthening treatment of material of disc cutter.

Cutters Plane Layout Design of the Full-Face Rock Tunnel Boring Machine (TBM) Based on Multi-Spiral Layout Pattern

2011 ◽  
Vol 308-310 ◽  
pp. 1288-1291
Author(s):  
Jun Zhou Huo ◽  
Hai Feng Zhao ◽  
Xu Zhang ◽  
Wei Sun ◽  
Yu Zhao
Keyword(s):  
Mathematical Model ◽  
Tunnel Boring Machine ◽  
Layout Design ◽  
Structure Design ◽  
Tunnel Boring ◽  
Technical Requirements ◽  
Pros And Cons ◽  
Full Face ◽  
Rock Tunnel ◽  
Cutter Head

The multi-spiral layout pattern has been widely adopted in practice during the layout design of the cutters. Considering the engineering technical requirements and the corresponding structure design requirements of the cutter head, this study formulates a nonlinear multi-objective mathematical model with multiple constraints for the cutters plane layout design based on a multi-spiral layout pattern. And then a genetic algorithm is employed to solve a cutters’ multi-spiral layout problem. An instance of the cutters’ plane layout design was solved by the proposed methods using a multi-spiral layout pattern. Experimental results showed the effectiveness of the method of combining the mathematical model with the algorithms, and the pros and cons of the multi-spiral layout pattern.

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