Modeling and prediction for the thrust on EPB TBMs under different geological conditions by considering mechanical decoupling

EPB TBMs (Earth pressure balance Tunneling Boring Machines) are extensively used in tunneling constructions because of its high efficiency and low disturbance on structures above ground. It is critically significant to predict the thrust acting on TBMs under different geological conditions for both the design of power system and the control of tunneling process. The interaction between the cutterhead and the ground is the core of excavation, through which geological conditions determine the thrust re-quirement combined with operating status and structural characteristics. This paper conducted a mechanical decoupling analysis to obtain a basic expression of the cutterhead-ground interactive stress. Then more engineering factors (such as cutterhead topological structure, underground overburden, thrusts on other parts, etc.) were further considered to establish a predicting model for the total thrust acting on a machine during tunneling. Combined with three subway projects under different geological conditions in China, the model was verified and used to analyze how geological, operating and structural parameters influence the acting thrust.

[1]  Zhende Hou,et al.  Mechanical characterization of the load distribution on the cutterhead–ground interface of shield tunneling machines , 2015 .

[2]  Wout Broere,et al.  Tunnel-boring in soft soil: A study on the driving forces applied to a slurry-shield TBM , 2012 .

[3]  Gong Guo-fang Yang Hua-yong Wang Hui Shi Hu.  Determination of thrust force for shield tunneling machine , 2011 .

[4]  Yilan Kang,et al.  Inverse Analysis and Modeling for Tunneling Thrust on Shield Machine , 2013 .

[5]  H. Copur,et al.  Estimating torque, thrust and other design parameters of different type TBMs with some criticism to TBMs used in Turkish tunneling projects , 2014 .

[6]  J. Rostami,et al.  Disc cutting tests in Colorado Red Granite: Implications for TBM performance prediction , 2007 .

[7]  Guofang Gong,et al.  A new calculation model of cutterhead torque and investigation of its influencing factors , 2012 .

[8]  Mitsutaka Sugimoto,et al.  Theoretical Model of Shield Behavior During Excavation. I: Theory , 2002 .

[9]  Lai Xinmin,et al.  A stiffness-matching based evaluation approach for compliance of mechanical systems in shield tunneling machines , 2012 .

[10]  Kourosh Shahriar,et al.  A support vector regression model for predicting tunnel boring machine penetration rates , 2014 .

[11]  H. Copur,et al.  Predicting performance of EPB TBMs by using a stochastic model implemented into a deterministic model , 2014 .

[12]  Pål Drevland Jakobsen,et al.  Development of the Soft Ground Abrasion Tester (SGAT) to predict TBM tool wear, torque and thrust , 2013 .

[13]  Zhonghua Wu,et al.  Mathematical Modeling of Heat and Mass Transfer in Energy Science and Engineering , 2013 .

[14]  Qiuming Gong,et al.  Study on rock mass boreability by TBM penetration test under different in situ stress conditions , 2014 .

[15]  Yilan Kang,et al.  The energy method to predict disc cutter wear extent for hard rock TBMs , 2012 .

[16]  Jamal Rostami,et al.  3D finite difference model for simulation of double shield TBM tunneling in squeezing grounds , 2014 .

[17]  Yilan Kang,et al.  Disc cutter wear prediction for a hard rock TBM cutterhead based on energy analysis , 2015 .

[18]  M. Monjezi,et al.  Study of the influence of geotechnical parameters on the TBM performance in Tehran–Shomal highway project using ANN and SPSS , 2013, Arabian Journal of Geosciences.

[19]  Yilan Kang,et al.  Analysis of Mechanical Properties of Two Typical Kinds of Cutterheads of Shield Machine , 2011 .

[20]  K. Johnson.  Contact Mechanics: Frontmatter , 1985 .

[21]  Günther Meschke,et al.  A 3D finite element simulation model for TBM tunnelling in soft ground , 2004 .

[22]  Jing Yang,et al.  Multi-directional coupling dynamic characteristics analysis of TBM cutterhead system based on tunnelling field test , 2015 .

[23]  Soo-Ho Chang,et al.  Evaluation of cutting efficiency during TBM disc cutter excavation within a Korean granitic rock using linear-cutting-machine testing and photogrammetric measurement , 2013 .

[24]  Yilan Kang,et al.  Theoretical model for loads prediction on shield tunneling machine with consideration of soil-rock interbedded ground , 2013 .

[25]  Xu Zhang,et al.  Dynamic Characteristics Study with Multidegree-of-Freedom Coupling in TBM Cutterhead System Based on Complex Factors , 2013 .

[26]  Jamal Rostami,et al.  Study of pressure distribution within the crushed zone in the contact area between rock and disc cutters , 2013 .