A Conceptual Model for Estimation on the Strength of Soil Rock Mixture After Grouting Reinforcement

  • Rentai Liu
  • Zhuo ZhengEmail author
  • Qingsong Zhang
Conference paper
Part of the Sustainable Civil Infrastructures book series (SUCI)


Soil rock mixture (SRM), which consists of rock blocks within soft matrix composed of sand, silt and clay, is often regarded as a kind of problematic geology during geotechnical engineering project. Grouting has been used as an effective method to improve mechanical behaviors of SRM. The main goal of this work is a comprehensive study of the physical mechanisms of grouting reinforcement on SRM. For this purpose, laboratory tests are carried out to simulate the process of grouting into SRM. Then, distribution of the grout in SRM is examined to investigate fracturing behavior of the grout suspension. The uniaxial compressive strength of the test samples are measured to investigate the influence of grouting process on the strength of SRM. Different controlling parameters are analyzed, such as volume of block proportion, block count and grouting volume. Based on the analysis, a concept model is proposed which considers three different mechanisms of grouting reinforcement. Finally, an empirical equation is proposed for estimation on the strength of grouted SRM. Results show that the proposed model can reasonably estimate the strength of the test samples.


Soil rock mixture Grouting suspension Compressive strength Empirical equation 



This work is support by the national key research and development plan of China (2016YFC0801600).


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© Springer International Publishing AG, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Geotechnical and Structural Engineering Research Center, Shandong UniversityJinanChina

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