Adverse Engineering Properties of Banxi Group Slatealong Changsha Metro Line 2

Abstract:

For comprehensive study the adverse engineering properties of Banxi Group slate along Changsha Metro Line 2, slate samples were tested and analyzed to research their mineral composition, physical and mechanical properties, weathered properties and disintegration. Test results show that sandy slate and argillite interbedded with each other, the main minerals of slate are quartz and clay minerals, the oxide are SiO2、Al2O3, the natural compressive strength of sandy slate is five to eight times that of argillite, its softening coefficient is less than 0.75, slate is easy to soften, argillite is easy to disintegration and the disintegration of sandy slate is medium grade. The adverse engineering characteristics lead to slate rock mass uneven with hard-soft. Differential weather of slate causes there are some bedrock weathered slots along Changsha Metro Line 2. So during construction, appropriate process and tool must be selected, control the tunnel oriented, strengthen the protection and shorten the bare time of rock mass.

• Periodical: Applied Mechanics and Materials (Volumes 204-208)
• Pages: 1401-1404
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.204-208.1401
• Online since: October 2012
• Authors: Chen An*
• Keywords: Argillite, Disintegration, Hard-Soft, Sandy Slate, Uneven, Weathered Slots

References

[1] Professional Standards Compilation Group of P.R. China. Code for investigation of geotechnical engineering(GB 50021-2001) [s]. Beijing：Construct Press, 2001(In Chinese).

[2] Professional Standards Compilation Group of P.R. China. Code on geotechnical investigations for metro and light rail transit. (GB 50307-1999)[s]. Beijing：Construct Press, 2000(In Chinese).

[3] Professional Standards Compilation Group of P.R. China. Standard for tests method of engineering rock masses (GB/T50266-99)[s]. Beijing：Construct Press, 2001(In Chinese).

[4] Chen An, Peng Zhen-bin, Luo Yi-sha. Journal of Hunan University of Science &Technology (Natural Science Edition). 2009. 3 24(1): 58-61(In Chinese).

[5] Zhou Yi, Peng Zhen-bin, Chen An. Journal of Hunan University of Science &Technology (Natural Science Edition). 2009. 12 24(4): 52-55(In Chinese).