Analysis of soil nailing execution methods from laboratory pullout tests
DOI:
https://doi.org/10.14195/2184-8394_119_1Keywords:
Soil nailing, Pullout tests, MonitoringAbstract
This study evaluated the shear strength of the soil-reinforcement interface (qs) of a soil nailing structure built in laboratory. The influence of three singular construction methodologies was analyzed. Pullout tests were performed on nine nails instrumented with electrical strain gauges. The pullout test allowed the quantification of the interface shear strength improvement by increasing the number of successive grout injec tions. Equations were formulated relating qs with injected grout volume, an important tool to evaluate nail performance. Additionally, the instrumented tests allowed the evaluation of the load distribution mechanisms. All tested nails were exhumed and their observations are presented in this study, especially regarding integrity and diameter uniformity of the nails.
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