Numerical Modeling of Hydraulic Pressure Cell and Investigating on Affecting Factors in its Coefficient Calibration

Moosavi, M. (University of Tehran) | Saeidi, M. (University of Tehran) | Eftekhari, A. (University of Tarbiat Modarres) | Taromi, M. (Islamic Azad University)

OnePetro 

ABSTRACT
Various factors such as physical and geometrical properties of pressure cell, properties of surrounding media and installation techniques seriously affect the accuracy of total pressure measurement within soil or concrete structure. In this study a numerical code was used to simulate some of factors affecting calibration coefficient and steps of installation in soil and tunnel concrete lining, for this purpose more than 1200 elastic 3D analysis for various installation situations performed. The results show for pressure cell in soils, geometric factors and compaction quality of the surrounding material greatly affect on the precision of measurement and for pressure cells that are installed in tunnel concrete lining, the most important factor in the installation method, is the place that pressure cell is installed in respect to the stress concentration.