Parametric Study of the Effect of Excavated Horseshoe Tunnels on the Maximum Surface Settlement and Inner Forces of Tunnel Lining

Document Type : Original Article

Authors

1 , Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran

2 Department of Civil Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran

Abstract

Generally, the Earth is under the force of actual stress and any disturbance such as tunnel excavation disarranges the stress condition and surface displacements. If these displacements are not in standard range, it can cause some problems in surface and lower level structures. At the time of tunnel excavation, some parameters such as cohesion, friction angle, elasticity modulus, tunnel diameter, and tunnel space affect the surface settlements and inner forces of tunnel lining. In this study, measured and examined effect of each of the above parameters.
According to the analysis, increase in cohesion, elasticity modulus and tunnel depth cause the surface settlement decrease but increasing the friction angle or tunnel diameter cause surface settlement enhancement. The results are described in detail by graph and table and the results show a significant effect of these parameters on the surface settlement and inner forces.

Keywords

References

 
─   Ling M, Lieyun D, Hanbin L.  (2014),
“Non-Linear description of ground settlement over twin tunnels in soil tunneling and Underground Space Technology”, 42: pp. 144-151.
 
─   Qian F,Qimin T,Dingli Z, Louis N. (2015), “Ground surface settlement due to construction of closely-space twin Tunnels with different geometric arrangements. Tunneling and Underground Space Technology”, 51:
pp.144-151.
 
─   Dindarloo S, Siami-Irdemoosa E. (2015), Maximum surface settlement based classification of shallow tunnels in soft ground tunneling and Underground Space Technology, 49:
pp.230-327.
 
─   [Xiongyao X, Yubing Y, Mei J. (2016), “Analysis of ground  surface settlement  induced  by the  construction of a Large-diameter shield-driven tunnel in Shanghai, Chin Tunneling and Underground Space  Technology”, 51:
pp. 120-132.
 
─    [Shui-Long  S,  Huai N, Yu-Jun  C,  Zhen-Yu  Y. Long-Term  (2014), “in soft  deposits of shanghi  tunneling and Underground Space Technology”, 40: pp. 309-323.
 
─   Chakeri H, Yilmaz O, Bahtiyar U. (2013), “Effects of important factors on surface settlement prediction for metro tunnel excavated. Tunneling and Underground Space Technology”. 36, pp.­14-23.
 
-کاتبی، ه­. سعدین، م . (1389)، "تحلیل و پیش بینی نشست سطحی زمین ناشی از تونلسازی (مطالعه موردی: پروژه خط دو قطارشهری  تبریز)". مهندسی حمل و نقل­.
 
-رضایی، م. ناصحی، ع­. (1390)، "اثر هندسه سازه بر روی نشست سطح زمین ناشی از حفر تونل به روش NATM  اولین کنفرانس ملی عمران و توسعه".
 
-جعفری، ح. پاکباز­، م­.  (1392)، "بررسی نشست سطح زمین 

Files

Share

How to cite

Statistics