Experimental Research on Rheological Property of Water-Bearing Weak Sandstone in Large Cross-Section Tunnelling

Abstract:

Various problems such as sand, mud and water bursting, unstability of tunnel face, large deformation of surrounding rock and severe cracking of primary support occurred in excavation of the water-bearing weak sandstone strata of Huma Ling Tunnel, Lan-Yu railway. Based on the uniaxial compressive strength tests and uniaxial compressive rheological tests on weak sandstone with water content of 0, 2%, 5%, 8% and 12%, the relationship between rheological characteristic and water content of water-bearing weak sandstone is obtained. According to results of tests, factors and water contents are fitted by applying generalized rheological equation of Kelvin. And the rheological equation of water-bearing weak sandstone with various water content is deduced. The test results and conclusion can offer reference for analyzing deformation characteristics and instability mechanism of water-bearing weak sandstone in large cross-section tunnelling.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 1402-1405
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.1402
• Online since: December 2012
• Authors: Ye Zhou, Peng Fei Li
• Keywords: Laboratory Test, Rheological Property, Tunnel Engineering, Water Content, Weak Sandstone

References

[1] LI Wenhua: Study on durability of lining structures for Buddha mountain tunnel[D]. Beijing: Beijing Jiaotong University, 2011.