Rock failure with weak planes by self-locking concept

Zhang, Guangqing

doi:10.1016/j.ijrmms.2009.03.009

Cited by 9 publications

(2 citation statements)

References 13 publications

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“…A series of parallel numerical simulation have been performed using the commercial finite element software MIDAS/GTS. Because the axial length of tunnel is much large than the dimension of crossing section, the three-dimensional model can be reduced to a two-dimensional model [19]. According to the real dimensions, as shown in Figure 4, the numerical meshes are built, as presented in Figure 5, which include intact rock, joints, and support structure.…”

Section: Numerical Simulation Methodsmentioning

confidence: 99%

Stability Analysis of Neighborhood Tunnels with Large Section Constructed in Steeply Jointed Rock Mass

Zheng

Feng

Tang

et al. 2020

Mathematical Problems in Engineering

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To investigate the instability of two neighborhood tunnels with large crossing section during the construction, the Tushan subway station was taken as study background, which was built in steeply jointed rock mass. Based on the excavation method called traditional double side drift, numerical simulations of four different face excavation sequences in the two neighborhood tunnels were conducted to optimize construction sequence to improve the stability during tunneling. The results show that first excavation of the right tunnel produced less deformation of the tunnels due to joints dip. The effects of rock mass discontinuities on the stability of the tunnels were studied through comparison between the real condition with joints and the assumed condition without joints. Furthermore, six initial supporting systems with different parameters were compared, and the field observations of deformations along tunnel profile show good agreement with the numerical results. Based on the numerical simulation, the length of rock anchors could be designed asymmetrically, which is more economical than the symmetrical design. The optimized thickness of shot concrete and spacing of steel sets was 35 cm and 60 cm, respectively.

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Section: Numerical Simulation Methodsmentioning

confidence: 99%

Stability Analysis of Neighborhood Tunnels with Large Section Constructed in Steeply Jointed Rock Mass

Zheng

Feng

Tang

et al. 2020

Mathematical Problems in Engineering

View full text Add to dashboard Cite

show abstract

“…The results of that study indicated that rocks would fail along weak planes under certain conditions, which had significant effects on wellbore stability. Following Aadnøy, various researchers proposed new methods to determine wellbore stability by assuming that rocks were transversely isotropic materials with anisotropic strength behaviors (Aadnøy and Chenevert, 1987;Aadnøy, 1988;Ong andRoegiers, 1993, 1996;Ong, 1994;Okland and Cook, 1998;Gupta and Zaman, 1999;Zhang, 2008Zhang, , 2009Chen et al, 2008a,b;Pei, 2008;Al-Bazali et al, 2009;Younessi and Rasouli, 2010;Tan et al, 2010;Jin et al, 2013;Hou et al, 2013;Zhang, 2013). Their works indicated that neglecting the effects of anisotropy could result in incorrect results.…”

Section: Introductionmentioning

confidence: 99%