Evaluating the Moisture Content Variation on Critical Strain of Geo-materials: A Case Study

محتوى المقالة الرئيسي

Dlshad Khurshid Al-Khailany
Mohammed M. Saleh
Ako Daraei

الملخص

The tunnel’s stability during construction is a very important matter. Some methods have been proposed for stability evaluation, but the hazard warning levels (HWLs) are more applicable among these methods. Despite monitoring and applying HWLs, several collapses in Shibli twin tunnels in Iran have cast doubts on the accuracy of this criterion in the presence of water. In this study, the critical strains under different water contents were measured through uniaxial compressive strength tests on 11 different shale and marl samples. A comparison of laboratory tests and numerical results shows that the influence of the moisture content on the critical strain is negligible. In addition, the results show that there is no direct relationship between the critical strain and uniaxial compression strength.

تفاصيل المقالة

القسم

Articles

كيفية الاقتباس

"Evaluating the Moisture Content Variation on Critical Strain of Geo-materials: A Case Study" (2022) مجلة الهندسة, 28(6), ص 27–38. doi:10.31026/j.eng.2022.06.03.

المراجع

• Carranza-Torres C., and Fairhurst, C., 2000. Application of the convergence-confinement method of tunnel design to rock masses that satisfy the Hoek-Brown failure criterion. Tunneling and Underground Space Technology 15(2): 187-21.

• Sakurai, S., 1981. Direct strain evaluation technique in construction of underground opening. 22nd U.S. symposium on rock mechanics, 29 June-2 July.

• Stacey, T. R., 1981. A simple extension strain criterion for fracture of brittle rock. Int. J. Rock Mech. Min. Sc. and Geomech. 18(6): 469-474.

• Fujii Y., Kiyama T., Ishijimay, Y., and Kodama, J., 1998. Examination of a Rock Failure Criterin Based on Circumferential Tensile Strain. Pure Appl. Geophys 152(3): 551–577.

• Hoek, E., 1998. Tunnel support in weak rock, The symposium of sedimentary rock engineering. Taipei, Taiwan, November 20-22

• Li, J., Villaescusa, E., 2005. Determination of rock mass compressive strength using critical strain theory, 40th U.S. Rock mechanics symposium, paper 663

• Singh, M., Singh, B., Choudhari, J., 2007. Critical strain and squeezing of rock mass in a tunnel, Tunneling and underground space technology 22(3): 343-350.

• Park, S. H., Ha, M. H, Park, G. R., and Shin, Y. S., 2008. A study on the safety assessment technique of a tunnel using critical strain concept. Word tunnel congress, India

• Kohmura, 2012. A study on critical strain of rocks. Journal of Japan society of civil engineers 68(3): 526

• Park Sh., and Park, Su., 2014. Case studies for tunnel stability based on the critical strain in the ground. KSCE Journal of Civil Engineering 18(3): 765–771.

• Sakurai, S., 1997. Lessons learned from field measurements in tunneling, Tunneling and Underground Space Technology 12(4): 453-460.

• Sakurai, S., 2017. Back analysis in rock engineering. CRC Press. Taylor and Francis.

• Vasarhelyi, B., 2003. Some observations regarding the strength and deformability of sandstones in case of dry and saturated conditions, Bull. Eng. Geol. Environ. 62(3):245-249.

• Vasarhelyi, B., 2005. Statistical analysis of the influence of water content on the strength of the Miocene limestone, Rock Mechanic and Rock Engineering 38(1):69-76.

• Kim and Kim, 2009. evaluation for applications of displacement criterion by the critical strain of uniaxial compression in rock mass tunnel. Journal of Korean Civil Engineering 29(6C): 321-329.

• Fattah, M. Y., Shlash, K. T., Salim, N. M., 2011. Effect of Reduced Ko Zone on Time-Dependent Analysis of Tunnels, Advances in Civil Engineering, Vol. 2011, Article ID 963502, 12 pages, 2011. doi:10.1155/2011/963502, Hindawi Publishing Corporation.