Numerical simulation of influence of section geometry on surrounding rock stability of arch tunnel with straight wall

Biao Wang; Yang Wang; Zhen-hao Zhang; Shuai Tao

doi:10.1117/12.2657861

22 December 2022 Numerical simulation of influence of section geometry on surrounding rock stability of arch tunnel with straight wall

Biao Wang, Yang Wang, Zhen-hao Zhang, Shuai Tao

Author Affiliations +

Proceedings Volume 12460, International Conference on Smart Transportation and City Engineering (STCE 2022); 1246039 (2022) https://doi.org/10.1117/12.2657861
Event: International Conference on Smart Transportation and City Engineering (STCE 2022), 2022, Chongqing, China

Abstract

Based on the Mohr-Coulomb strain softening model, the nonlinear CWFS criterion of friction strengthening and cohesion weakening is adopted, and the deterioration behavior of tensile strength and stiffness modulus caused by tensile-shear coupling yield of intact rock mass is considered. Through two different modeling methods, the influence of geometric characteristics of straight wall arch tunnel section on the failure of surrounding rock and rock-burst is simulated. The results show that the geometric characteristics of tunnel section have obvious influence on the stability of surrounding rock. The rise-span ratios are 0.5, 0.297 and 0.16, and the height of straight wall is 0.875 m. The plastic zone, rock-burst zone, tensile yield zone and shear strain localization zone of surrounding rock decrease with the decrease of rise-span ratio. When the rise-span ratios are 0.5, 0.297 and 0.16, and the vertical wall heights are 0.875 m, 1.23 m and 1.47 m, respectively, the plastic zone, rock-burst zone, tensile yield zone and shear strain localization zone of surrounding rock increase significantly with the decrease of rise-span ratio. When the rise-span ratio is 0.16 and the straight wall height H4 = 1.47 m, the maximum shear strain increment is about 10-2 , which is an order of magnitude higher than other schemes. According to Russense rock-burst criterion and shear strain localization results, the rock-burst units are mainly concentrated in the top and bottom of the tunnel section, which is consistent with the rock-burst position recorded in the field tunnel.

Citation Download Citation

Biao Wang, Yang Wang, Zhen-hao Zhang, and Shuai Tao "Numerical simulation of influence of section geometry on surrounding rock stability of arch tunnel with straight wall", Proc. SPIE 12460, International Conference on Smart Transportation and City Engineering (STCE 2022), 1246039 (22 December 2022); https://doi.org/10.1117/12.2657861

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
7 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Failure analysis

Numerical simulations

Computer simulations

Process modeling

Chromium

Composites

Computer programming

Show All Keywords

Keywords/Phrases

Search In:

Publication Years