Model Test Study on Influences of Layered Rock Mass Dip Angle on Stability of Deep-Buried Tunnel

Abstract:

Physical models of layered rock mass with different dip angles are built by physical model test in accordance with the bias failure characteristics of surrounding rocks of layered rock mass in Gonghe Tunnel. Bias failure characteristics of surrounding rocks in thin-layered rock mass and influences of layered rock mass dip angle on stability of tunnel are studied. The research results show that failure characteristics of physical models generally coincide with those of surrounding rocks monitored from the tunnel site. The failure regions of surrounding rock perpendicular to the stratification planes are obviously larger than those parallel to. The stress distributions and failure characteristics in the surrounding rocks are similar to each physical model of different dip angles. The stress distributions and failure regions are all elliptic in shape, in which the major axis is in the direction perpendicular to the stratification planes while the minor axis is parallel to them. As a result, obvious bias failure of surrounding rocks has gradually formed. The physical model tests provide reliable basis for theoretical analysis on the failure mechanism of deep-buried layered rock mass.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 2363-2371
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.2363
• Online since: September 2011
• Authors: Bin Wei Xia, Ke Hu, Yi Yu Lu, Dan Li, Zu Yong Zhou
• Keywords: Deep-Buried Tunnel, Dip Angle of Rock Layer, Layered Rock Mass, Physical Model Test, Stability

References

[1] A. Serrano, C. Olalla: Int. J. Rock Mech. Min. Sci. Vol. 35 (1998), pp.301-324.

[2] Ren D H, Zhang P: Journal of China Coal Society Vol. 13 (1998), pp.51-53 (In Chinese).

[3] Du S G, Zhou Q L, Sun Y F: China Journal of Highway and Transport Vol. 10(1997), pp.64-69 (In Chinese).

[4] Peng Jia, Chunan Tang, Tianhong Yang, et al: Journal of Northeastern University (Natural Science) Vol. 27 (2006), pp.1275-1278 (In Chinese).

[5] Weizhong Chen, Shucai Li, Weishen Zhu, et al: Chinese Journal of Rock Mechanics and Engineering Vol. 23 (2004), pp.3281-3287 (In Chinese).

[6] Ming Xiao, Yanglei Wang: Chinses Journal of Rock Mechanics and Engineering Vol.19 (2002), pp.2057-2060 (In Chinese).

[7] K. Monsen, N. Barton: Int. J. Rock Mech. and Min. Sci. Vol. 38 (2001), pp.1035-1045.

[8] Xiaohong Li, Yiyu Lu, Yong Kang, et al: Simulation experiment technique of rock mechanics (Science Press, Beijing 2007) (In Chinese).

[9] Binwei Xia, Xiaohong Li, Changrui Han, et al: Hydrogeology & Engineering geology Vol. 36 (2009), pp.75-79 (IN Chuneses).

[10] Binwei Xia: Experimental Study on the Mechanism of Instability of Layered Rock Mass in Deep Buried Tunnel (Chongqing University, Chongqing 2009 )(in Chinese).

[11] Baocheng Zuo, Congxin Chrn, Caihua Liu, et al: Rock and Soil Mechanics Vol. 25 (2004), pp.1805-1808 (In Chinese).

[12] Weigang An: The research of rocky similar material (Central South University, Changsha 2002) (In Chinese).

[13] XuefuYu, Yingren Zheng and Huaiheng Liu: Stability Analysis of Surrounding Rocks of Underground Engineering (China Coal Industry Publishing House, Beijing 1983) (in Chinese).