Geomechanics and Engineering

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An improved model of compaction grouting considering three-dimensional shearing failure and its engineering application

  • Li, Liang (School of Civil Engineering, Central South University, Central South University Railway Campus) ;
  • Xiang, Zhou-Chen (School of Civil Engineering, Central South University, Central South University Railway Campus) ;
  • Zou, Jin-Feng (School of Civil Engineering, Central South University, Central South University Railway Campus) ;
  • Wang, Feng (School of Civil Engineering, Central South University, Central South University Railway Campus)
  • Received : 2018.11.22
  • Accepted : 2019.10.14
  • Published : 2019.10.30
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Abstract

This study focuses on an improved prediction model to determine the limiting grouting pressure of compaction grouting considering the ground surface upheaval, which is caused by the three-dimensional conical shearing failure. The 2D-dimensional failure curve in Zou and Xia (2016) was improved to a three-dimensional conical shearing failure for compaction grouting through coordinate rotation. The process of compaction grouting was considered as the cavity expansion in infinite Mohr-Coulomb (M-C) soil mass. The prediction model of limiting grouting pressure of compaction grouting was proposed with limit equilibrium principle, which was validated by comparing the results in El-Kelesh et al. (2001) and numerical method. Furthermore, using the proposed prediction model, the vertical and horizontal grouting tube techniques were adopted to deal with the subgrade settlement in Shao-huai highway at Hunan Provence of China. The engineering applicability and effectiveness of the proposed model were verified by the field test. The research on the prediction model for the limiting grouting pressure of compaction grouting provides practical example to the rapid treatment technology of subgrade settlement.

Keywords

References

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