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Experimental research on the structural optimization of grouting holes in circular and rectangular pipe sections for
Jiwei Wen1,2, Yachen Ma3, Tian Xiang4,5
1Key Laboratory of Roads and Railway Engineering Safety Control (Shijiazhuang Tiedao University), Ministry of Education, Shijiazhuang, 050043, China. wenjiwei@stdu.edu.cn.
Scientific Reports
|January 6, 2025
Summary
Optimizing grouting hole design in pipe jacking reduces soil friction. Uniform hole layouts create better slurry jackets, enhancing construction efficiency and safety in trenchless engineering.
Area of Science:
- Civil Engineering
- Geotechnical Engineering
- Trenchless Technology
Background:
- High-quality slurry jackets are crucial for reducing pipe-soil friction in trenchless pipe jacking.
- Reducing frictional resistance improves construction efficiency, safety, and reduces risks.
Purpose of the Study:
- To investigate the influence of grouting hole structural parameters on pipe-soil frictional resistance.
- To analyze the formation of slurry jackets around pipe sections with varying grouting hole designs.
Main Methods:
- Improved multifunctional experimental apparatus for pipe-soil frictional resistance testing.
- Orthogonal experimental design to study circular and rectangular pipe sections.
- Analysis of grouting hole spacing, deflection angle, and layout.
Main Results:
- Pipe-soil frictional resistance increases with greater grouting hole spacing and deflection angle.
- Grouting hole layout significantly impacts frictional resistance and slurry jacket quality.
- Uniform layouts promote complete slurry jackets, effectively reducing friction.
Conclusions:
- Optimal grouting hole parameters (triple layout, 417mm spacing, 40° deflection) were identified for both circular and rectangular pipes.
- These findings offer scientific guidance for minimizing pipe-soil friction in trenchless pipe jacking.
- Effective slurry jacket formation is key to successful pipe jacking operations.
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