《Evaluations of load-deformation behavior of soil nail using hyperbolic pullout model》.pdfVIP

Geomechanics and Engineering, Vol. 6, No. 3 (2014) 277-292 DOI: /10.12989/gae.2077 277   Evaluations of load-deformation behavior of soil nail using hyperbolic pullout model 1a 2b 1,2 1c 3d Cheng-Cheng Zhang , Qiang Xu , Hong-Hu Zhu , Bin Shi and Jian-Hua Yin 1 School of Earth Sciences and Engineering, Nanjing University, Nanjing, China 2 State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu, China 3 Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China (Received February 15, 2013, Revised November 09, 2013, Accepted November 21, 2013) Abstract. Soil nailing, as an effective stabilizing method for slopes and excavations, has been widely used worldwide. However, the interaction mechanism of a soil nail and the surrounding soil and its influential factors are not well understood. A pullout model using a hyperbolic shear stress-shear strain relationship is proposed to describe the load-deformation behavior of a cement grouted soil nail. Numerical analysis has been conducted to solve the governing equation and the distribution of tensile force along the nail length is investigated through a parametric study. The simulation results are highly consistent with laboratory soil nail pullout test results in the literature, indicating that the proposed model is efficient and accurate. Furthermore, the effects of key parameters, including normal stress, degree of saturation of soil, and surface roughness of soil nail, on the model parameters a