Theorical Calculations and Verification of Spherical Cavity Grouting Based on Generalized SMP Strength Criterion

YE Junneng; HU Wei; ZHOU Ye; YE Ronghua; LU Xing

doi:10.13204/j.gyjzG22042007

Volume 53 Issue 5

May 2023

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YE Junneng, HU Wei, ZHOU Ye, YE Ronghua, LU Xing. Theorical Calculations and Verification of Spherical Cavity Grouting Based on Generalized SMP Strength Criterion[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(5): 150-157. doi: 10.13204/j.gyjzG22042007

Citation:

YE Junneng, HU Wei, ZHOU Ye, YE Ronghua, LU Xing. Theorical Calculations and Verification of Spherical Cavity Grouting Based on Generalized SMP Strength Criterion[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(5): 150-157. doi: 10.13204/j.gyjzG22042007

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Theorical Calculations and Verification of Spherical Cavity Grouting Based on Generalized SMP Strength Criterion

doi: 10.13204/j.gyjzG22042007

1. Ningbo Rail Transit Group Co., Ltd., Ningbo 315010, China;
2. Institute of Geotechnical Engineering, Ningbo University, Ningbo 315211, China

Received Date: 2022-04-20

Abstract

Abstract

Based on the generalized SMP strength criterion theory, combined with the non-associated flow law, the boundary conditions between the elastic-plastic interface of soil and the conservation law of soil volumes, the analytical expressions of stress fields, strain fields and pore expansion pressure in the elastic-plastic zone of spherical cavity expansion in undrained conditions were derived and applied to stratum grouting. The grouting pressure expression of analytical solutions in splitting failure of soil during grouting was obtained. The solution was compared with the theoretical solution of spherical cavity expansions in the existing literatures,simultaneously, parameter analysis was performed. Finally, comparisons between the measured values of grouting pressure by a tunnel grouting model test and theoretical values were conducted. The results indicated that cohesive force, shear expansion angles and expansion radii had great influences on splitting grouting pressure values. The actual grouting pressures were consistent with theoretical calculation values of splitting grouting.
- generalized SMP strength criterion,
- spherical cavity expansion,
- split grouting pressure,
- model test

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References(20)

References

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