TY  - BOOK
AU  - Nguyen Van Hoan
AU  - Sugimoto,M.
AU  - Balasubramaniam,A.S.
AU  - Ashford,Scott A.
ED  - The Government of Japan, 
TI  - Modelling of pushing resistance on cohesionless soil using different scale model tests
T2  - Thesis
PY  - 1996///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Shields (Geology)
KW  - Tunnels
N1  - A thesis submitted in partial fulfillment of requirements for the degree of Master of  Engineering, School of Civil Engineering; Thesis (M. Eng.) - Asian Institute of Technology, 1996
N2  - The capacity of cutting equipment depends on the acting load. Nevertheless, the acting  load on the cutter face of shield has not been clear. The last year research made clear that the  pushing resistance, which does not appear in the design of shield capacity, is an important  component of the acting load.  This study aims to make the model of pushing resistance on Cohesionless soil by  different scale model tests.  In this research study, Axial force and torque behavior exhibited in dry compact sand  (relative density of 100%) have been investigated. Pushing resistance, as a major component of  cutter torque, has been found to be the function of speed ratio (v/f), radius (R0 and Rj) and the  number of cutter path (P n), which is different from the theoretic equations. Based on the  experimental results the model equations for pushing resistance have been proposed. As the  stress concentration occurs at the tip of the cutter bits, the friction concept does not satisfy the  test model and two constants known as influencing factors At and b have been introduced to  describe the model. These parameters both are found to be the function of face angle (Uc) and  clearance angle (y c)·
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B15105
ER  -