Scholarlink

<p>Compared to the traditional soil nail, the compaction-grouted soil nail exhibits better potential in terms of pull-out stress and hardening behavior with displacement. Different from the traditional soil nail, in which grout diffusion in the soil is uncertain, the compacted-grouted soil nail makes the grout diffusion in a controllable range through the grout bulb, so that the pull-out stress of a single soil nail can be calculated more accurately. To quickly and accurately predict the pull-out stress of a compaction-grouted soil nail, an in-situ method is needed before application. Considering that pile bearing resistance is similar to the pull-out resistance of the compaction-grouted soil nail with an end-bearing behavior, a Cone Penetration Test (CPT)-based method to predict the pull-out stress of the compaction-grouted soil nail was proposed in this study. The prediction method was verified via physical model tests. The results demonstrate a linear correlation between the pull-out stress and cone tip stress. In order to enhance the generalizability of the proposed method, the pull-out stress is adopted using the pull-out resistance divided by the cross-sectional area of the soil nail. A CPT-derived prediction model for the pull-out stress of the compaction-grouted soil was further established and optimized based on the pull-out stress data. The study can provide a quick prediction approach for the performance of the compaction-grouted soil nail in practice.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Prediction of Pull-Out Stress of Pressure-Grouted Soil Nails in Compact-Dense Sand Using CPT Results

  • 期刊论文

  • 发表日期：

    2025年9月4日

查看全文
  • Xinyu Ye,
  • Linbo Xie,
  • Xiaoyue Zheng,
  • Lei Yang,
  • Pan Huang,
  • Shanyong Wang

摘要

Compared to the traditional soil nail, the compaction-grouted soil nail exhibits better potential in terms of pull-out stress and hardening behavior with displacement. Different from the traditional soil nail, in which grout diffusion in the soil is uncertain, the compacted-grouted soil nail makes the grout diffusion in a controllable range through the grout bulb, so that the pull-out stress of a single soil nail can be calculated more accurately. To quickly and accurately predict the pull-out stress of a compaction-grouted soil nail, an in-situ method is needed before application. Considering that pile bearing resistance is similar to the pull-out resistance of the compaction-grouted soil nail with an end-bearing behavior, a Cone Penetration Test (CPT)-based method to predict the pull-out stress of the compaction-grouted soil nail was proposed in this study. The prediction method was verified via physical model tests. The results demonstrate a linear correlation between the pull-out stress and cone tip stress. In order to enhance the generalizability of the proposed method, the pull-out stress is adopted using the pull-out resistance divided by the cross-sectional area of the soil nail. A CPT-derived prediction model for the pull-out stress of the compaction-grouted soil was further established and optimized based on the pull-out stress data. The study can provide a quick prediction approach for the performance of the compaction-grouted soil nail in practice.