Vol16 No.7: 1715-1730
【Title】A novel radial cable for restraining tensile failure in steep fill–rock interfaces
【Author】HUANG Da; LI Pei-ji; CEN Duo-feng*
【Addresses】School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin 300401, China
【Corresponding author】CEN Duo-feng
【Citation】Huang D, Li PJ, Cen DF (2019) A novel radial cable for restraining tensile failure in steep fill–rock interfaces. Journal of Mountain Science 16(7). https://doi.org/10.1007/s11629-018-5188-7
【Abstract】It is quite common for fill slopes such as embankments and airport foundations to be constructed in mountainous areas. Steep fill–rock interfaces in such areas undergo tensile failure owing to differences in the stiffness values and tensile strengths of the soil and hard rock. In this study, a new anchor system, termed “radial cable,” is proposed to increase the pullout capacity of cables in the fill; this in turn helps control tensile deformation in the fill slope along the interface. In a radial cable, the steel ropes of a conventional cable are equally and symmetrically separated into three sub-cables (a central sub-cable and two branch sub-cables) with a radial distribution starting from the position of the interface. Moreover, each of the sub-cables is fixed in the fill using short U-shaped rigid rods along the cable length and a rigid baffle at its end to further increase pullout resistance. Experimental and numerical uplift tests were conducted to analyze the pullout capacity and anchoring behavior of the radial cables in soil to study the effect of branching. The reinforcement effect of the radial cables was also examined using a case study.
【Keywords】Fill slope; Fill–rock interface; Tensile failure; Radial cable; Pullout capacity