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Home > News > Industry Information > The Analysis Of The Soil Nailing Technology Failure Reason

The Analysis Of The Soil Nailing Technology Failure Reason


Soil nailing has emerged as a prominent and widely adopted active supporting technology in the realm of geotechnical engineering, particularly in roadway support. Its popularity stems from its convenient and simple construction methods, excellent supporting effects, reduced labor intensity, and adaptability. However, the success of soil nailing is contingent on various factors, and any oversight in the design or execution can lead to failures. This article delves into the intricate aspects of soil nailing technology failures, shedding light on the underlying causes and emphasizing the significance of comprehensive analysis and proactive measures.

self drilling anchor bolt as soil nails

1. Geological Conditions and Design Accuracy

The cornerstone of effective soil nailing lies in meticulous design based on accurate geological conditions. Before embarking on tunnel construction, the technical department employs soil nailing theory to formulate detailed designs and calculations. The anchor length is a critical parameter, determined through careful consideration of specific circumstances. However, failure can ensue if the design calculations do not precisely align with the unique geological conditions, rendering the supporting parameters ineffective in adapting to changes.

Adapting to Geological Changes

Geological conditions are dynamic, and unforeseen alterations can impact soil nailing effectiveness. To mitigate failures, it is imperative to reassess and recalibrate the design parameters in response to evolving geological conditions. This adaptive approach ensures that soil nailing remains robust in the face of unforeseen changes, maintaining stability and support.

Exposed Length and Effective Support

Reducing the exposed length of soil nails is a proactive strategy to ensure effective support. Prolonged exposure can diminish the corresponding effective length, compromising support. By maximizing anchorage length within given conditions, engineers can enhance the overall effectiveness of soil nailing, bolstering its support capabilities.

2. Other Causes of Failure of Soil Nailing Techniques

Material and Design Impact

The materials used and the intricacies of the design significantly influence the bearing capacity of soil nails. The bearing capacity of soil nails is intricately tied to the materials chosen for construction. The engineer should pay attention to the importance of precise design in maximizing bearing capacity, and the harmonious relationship between material quality and design accuracy.

Construction Team Proficiency

The complexities of soil nailing require meticulous attention to detail during construction. The proficiency of the construction team plays a pivotal role in the success of soil nailing projects. The deviations in construction procedures, such as inaccuracies in the angle of the anchor rod or variations in soil nail hole depth, can significantly impact the quality of soil nailing. The skilled and well-coordinated construction team could ensure the proper execution of each step in the soil nailing process to avoid compromising the effectiveness of the support system.

Timely Support and Prestressed Rock Anchor Bolts

The timely support after tunnel excavation is critical in ensuring the long-term success of soil nailing projects. Timely support of tunnels and the strategic use of prestressed rock anchor bolts play a crucial role in enhancing the strength of surrounding rock, controlling early deformation, and maximizing the bearing capacity of the support system.

Soil Nailing Safety Inspection

A robust safety inspection regimen is imperative to ensure the efficacy of soil nailing support systems. The construction team needs engineering quality detection and mine pressure monitoring to promptly identify and address any issues. A proactive inspection approach enhances the overall safety and effectiveness of soil nailing systems.


In conclusion, the success of soil nailing technology is contingent on a multifaceted approach that encompasses accurate design, adaptive strategies, material considerations, construction team proficiency, timely support, and rigorous safety inspections. By comprehensively addressing these aspects, can mitigate the risk of soil nailing failures and ensure the longevity and effectiveness of this widely embraced support technology.