Underground engineerings often encounter ground water during their construction and operating. Studies on coupling mechanism between pore pressure variation and rock deformation are thus essential for stability and durability analysis in underground engineerings. This work presents the laboratory and numerical investigations on anisotropic mechanical, poromechanical and fluid transport behaviors of sandstone. Triaxial compression tests were performed to study the mechanical behavior. Effective Biot's coefficients in axial and lateral directions as well as permeability in axial direction were...