Research on Solidification Ratio of Tunnel Mudstone and Experimental Verification Analysis of Karst Reinforcement Model

DOI: https://doi.org/10.62517/jcte.202606113

Author(s)

Qiusheng Wang*, Penghai Xu, Ruitao Zhang

Affiliation(s)

Beijing University of Technology, Beijing, China *Corresponding Author

Abstract

With the advancement of infrastructure development in karst regions, traditional pile foundation construction faces challenges posed by complex geological conditions, particularly under the influence of irregular cavities such as karst caves and fractures, where pile stability and load-bearing capacity often cannot be effectively guaranteed. Grouting reinforcement technology, as a commonly employed engineering measure, relies heavily on the selection and proportioning of grouting materials. Optimal slurry mixtures not only determine fluidity and strength under varying geological conditions but also directly impact the long-term durability and cost-effectiveness of pile reinforcement. With the growing adoption of resource recycling concepts, waste mudstone has garnered significant attention as a low-cost mineral admixture in grouting materials. Through optimized studies on water-to-solid mass ratios, cementitious material proportions, and admixture dosages, this research demonstrates the superior performance of modified mudstone slurry in karst pile reinforcement, particularly in enhancing slurry stability, compressive strength, and construction adaptability. Model tests further validate the feasibility of mudstone slurry grouting reinforcement. The modified mudstone slurry not only effectively reduces construction costs but also provides innovative approaches for resource utilization of waste mudstone, promoting dual advancements in environmental protection and engineering technology.

Keywords

Karst Pile Foundation; Mix Ratio Optimization; Waste Mudstone; Resource Utilization; Model Testing

References

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