Application of a small-timescale fatigue, crack-growth model to the plane stress/strain transition in predicting the lifetime of a tunnel-boring-machine cutter head

Huo, Junzhou; Zhu, Dong; Hou, Nan; Sun, Wei; Dong, Jianghui

doi:10.1016/j.engfailanal.2016.11.002

Cited by 31 publications

(17 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The depth of underground excavations is increasing day by day for different civil and mining engineering projects posing more challenges for safe and economic construction [1][2][3]. The difficulties for modelling such underground excavations due to the complex nature of rock mass are decreasing due to advancement in the research and technology, materials and systems not only in the conventional excavations methods, but also in mechanized one [4][5][6][7]. In underground excavations, the issues related to the rock-mass behavior comprise the strength properties of intact rock, joint related aspects, environmental features (ground water and in situ stresses), configuration of the excavation cross section, and the excavation method; furthermore, these issues define the support required for the underground excavation [8,9].…”

Section: Introductionmentioning

confidence: 99%

Weightage Effect during Back-Calculation of Rock-Mass Quality from the Installed Tunnel Support in Rock-Mass Rating and Tunneling Quality Index System

et al. 2019

View full text Add to dashboard Cite

In extensively used empirical rock-mass classification systems, the rock-mass rating (RMR) and tunneling quality index (Q) system, rock-mass quality, and tunnel span are used for the selection of rock bolt length and spacing and shotcrete thickness. In both systems, the rock bolt spacing and shotcrete thickness selection are based on the same principle, which is used for the back-calculation of the rock-mass quality. For back-calculation, there is no criterion for the selection of rock-bolt-spacing-based rock-mass quality weightage and shotcrete thickness along with tunnel-span-based rock-mass quality weightage. To determine this weightage effect during the back-calculation, five weightage cases are selected, explained through example, and applied using published data. In the RMR system, the weightage effect is expressed in terms of the difference between the calculated and back-calculated rock-mass quality in the two versions of RMR. In the Q system, the weightage effect is presented in plots of stress reduction factor versus relative block size. The results show that the weightage effect during back-calculation not only depends on the difference in rock-bolt-spacing-based rock-mass quality and shotcrete along with tunnel-span-based rock-mass quality, but also on their corresponding values.

show abstract

Section: Introductionmentioning

confidence: 99%

Weightage Effect during Back-Calculation of Rock-Mass Quality from the Installed Tunnel Support in Rock-Mass Rating and Tunneling Quality Index System

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Inhomogeneous strong load acting on cutterhead and shield is the main factor affect the trajectory deviation. Huo et al [12][13][14] carried a dynamic characteristics and structure optimization of TBM cutter system with multi-joint surface. CSM model [15] is applied to describe the interactions between cutterhead and rocks.…”

Section: Introductionmentioning

confidence: 99%

Indirect Adaptive Robust Trajectory Tracking Control of Hard Rock TBM with Load Variation of Tunneling Face

Shao

Liao

Liu

et al. 2019

Chin. J. Mech. Eng.

View full text Add to dashboard Cite

Posture adjustment of open-type hard rock tunnel boring machine (TBM) can be achieved by properly adjusting the hydraulic pressure of gripper cylinder and torque cylinders. However, the time-varying inhomogeneous load acting on tunneling face of TBM and complex stratum working condition can cause the trajectory deviation. In this paper, the position and posture rectification kinematics and dynamics models of TBM have been established in order to track the trajectory. Moreover, there are uncertain parameters and uncertain loads from complex working conditions in the dynamic model. An indirect adaptive robust control strategy is applied to achieve precise position and posture trajectory tracking control. Simulation results show when the position deviation only occurs in Y-axis and the current orientation is parallel with the designed axis, the deviation can be corrected by controlling the pressure of gripper cylinder and the actual trajectory meets the designed axis when TBM is pushed forward 0.14 m in X-axis. If the deviation only occurs in Z-axis, then the deviation can be corrected by controlling torque cylinders. If the position deviation occurs both in Y-axis and Z-axis at the same time, the pressure of gripper cylinder and torque cylinders should be controlled at the same time to rectify the deviation. Simulation results are shown to illustrate the effectiveness and robustness of the proposed controller. This research proposes an indirect adaptive robust controller that can track the planned tracking trajectory smoothly and rapidly. which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

show abstract

“…The boring process is accompanied by huge torque, thrust, and large impact load from mixed rock masses, sticky soil, and high groundwater pressure. Such unbalanced loads lead to serious vibration of the TBM cutter head and the segment erector (e.g., Ling et al 2015;Huo et al 2017).…”

Section: Introductionmentioning

confidence: 99%

Development and simulation of magnetorheological damper for segment erector vibration control

Yang

Zhang

Bai

et al. 2019

Transactions of the Canadian Society for Mechanical Engineering

View full text Add to dashboard Cite

In this paper, magnetorheological dampers are applied to a segment erector to replace passive vibration dampers. Because magnetorheological damper dynamics are highly nonlinear, design of a direct control system is impossible. To apply linear control theory directly to design the magnetorheological damper controller, the Takagi–Sugeno fuzzy model analytically represents the segment erector model. In addition, a disturbance observer based on a Takagi–Sugeno fuzzy controller is proposed for this system. Both simulations and experiments validate the performance enhancement and stability of the controller. The results show that the acceleration of the segment erector was reduced by 59.6% and 32.1% in oblique wave excitation and random excitation, respectively, compared to a conventional passive damper. The proposed fuzzy controller and magnetorheological dampers have great potential in practical applications because they can significantly improve the performance of a segment erector.

show abstract

Application of a small-timescale fatigue, crack-growth model to the plane stress/strain transition in predicting the lifetime of a tunnel-boring-machine cutter head

Cited by 31 publications

References 20 publications

Weightage Effect during Back-Calculation of Rock-Mass Quality from the Installed Tunnel Support in Rock-Mass Rating and Tunneling Quality Index System

Weightage Effect during Back-Calculation of Rock-Mass Quality from the Installed Tunnel Support in Rock-Mass Rating and Tunneling Quality Index System

Indirect Adaptive Robust Trajectory Tracking Control of Hard Rock TBM with Load Variation of Tunneling Face

Development and simulation of magnetorheological damper for segment erector vibration control

Contact Info

Product

Resources

About