In recent years, space, financial provisions, and time have become the biggest constraints in transportation infrastructure projects. These constraints force roadway/ railway alignments to pass through deep cuts (soil/rock) and/or high embankments fills within limited Right of way (ROW). Stabilization of these deep cuts is a major challenge for design engineers. Implementation of soil nails will help in achieving the stability of deep cuts (vertical/inclined cuts) in both permanent and temporary works. This technique is relatively more economical in comparison with other conventional techniques like cut and cover methods and retaining wall system. A proper understanding of feasibility analysis, design procedures and construction sequences is imperative. This paper presents a case study on vertical cut stabilization, by portraying the importance of proper field investigations, pullout tests, design aspects, and other field implementation scenarios. Limit equilibrium analyses are performed to demonstrate the design procedures, which are in line with the standard code of practice. All the failure modes are examined and ensured required factor of safety. The development of bond stress, pullout strength, and tensile capacity of nails considered in the design are clearly brought out in this study.

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Design Guidelines for a Soil Nail Wall: Case Study

  • Siva Krishna Barli,
  • Rahul Ravindra Vaidya,
  • T. I. George

摘要

In recent years, space, financial provisions, and time have become the biggest constraints in transportation infrastructure projects. These constraints force roadway/ railway alignments to pass through deep cuts (soil/rock) and/or high embankments fills within limited Right of way (ROW). Stabilization of these deep cuts is a major challenge for design engineers. Implementation of soil nails will help in achieving the stability of deep cuts (vertical/inclined cuts) in both permanent and temporary works. This technique is relatively more economical in comparison with other conventional techniques like cut and cover methods and retaining wall system. A proper understanding of feasibility analysis, design procedures and construction sequences is imperative. This paper presents a case study on vertical cut stabilization, by portraying the importance of proper field investigations, pullout tests, design aspects, and other field implementation scenarios. Limit equilibrium analyses are performed to demonstrate the design procedures, which are in line with the standard code of practice. All the failure modes are examined and ensured required factor of safety. The development of bond stress, pullout strength, and tensile capacity of nails considered in the design are clearly brought out in this study.