IS 14458:1998 Part 2 is the Indian Standard (BIS) for soil nailing - guidelines for construction and quality control. This code provides guidelines for the construction, quality control, and testing of soil-nailed structures. It covers the entire construction sequence from excavation and drilling to nail installation, grouting, and facing construction, ensuring the stability and performance of the ground improvement system.
Provides guidelines for the construction and quality control procedures for soil nailing systems.
Overview
- Status
- Current
- Usage level
- Specialized
- Domain
- Geotechnical — Geosynthetics and Ground Improvement
- Type
- Code of Practice
Also on InfraLens for IS 14458
BIM-relevant code. See the BIM Hub for ISO 19650, IFC, and LOD/LOIN frameworks used alongside it.
Practical Notes
! Careful top-down staged excavation is critical; never excavate below the next nail level before installing and testing the current level.
! Hole flushing with water or air is essential before grouting to remove debris and ensure a proper bond between the ground and the grout.
! For sacrificial test nails, testing to 2.0 times the working load helps verify the ultimate bond resistance assumed in the design.
Frequently referenced clauses
soilgroutsteelshotcrete
International Equivalents
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International Comparison — Coming Soon
We're adding equivalent international standards for this code.
Key Values6
Quick Reference Values
Minimum 28-day grout cube strength25 MPa
Maximum water-cement ratio for grout0.5
Drill hole inclination tolerance1 in 75 of specified angle
Drill hole position tolerance at face150 mm
Proof test load for production nails1.25 times design working load
Sacrificial test nail load2.0 times design working load
Tables & Referenced Sections
Key Tables
Table 1 - Grout Strength Requirements
Table 2 - Frequency of Quality Control Tests
Key Clauses
Clause 4 - Construction Sequence
Clause 5 - Drilling
Clause 6 - Nail Installation and Grouting
Clause 7 - Construction of Facing
Clause 9 - Quality Control and Testing
Frequently Asked Questions4
What is the difference between a proof test and a sacrificial test?+
A proof test is a non-destructive test on a production nail at 1.25x working load to check quality, while a sacrificial test is a destructive test on a non-production nail at up to 2.0x working load to validate design parameters (Clause 9.3).
What is the minimum required strength for grout?+
The 28-day characteristic compressive cube strength of the grout should not be less than 25 MPa (Clause 6.3.2 & Table 1).
What is the tolerance for the location of the drill hole?+
The hole position at the face should be within 150 mm of the specified location (Clause 5.3).
How is the facing typically constructed?+
The facing is usually a layer of reinforced shotcrete, often with a drainage system, applied after a row of nails is installed and has achieved sufficient strength (Clause 7).
QA/QC Inspection Templates
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QA/QC templates coming soon for this code.