Journal
UNDERGROUND SPACE
Volume 7, Issue 5, Pages 882-897Publisher
KEAI PUBLISHING LTD
DOI: 10.1016/j.undsp.2021.12.011
Keywords
Analytical method; Tunnelling undercrossing; Asymmetric ground movement; Longitudinal tunnel behaviours; Tunnel horizontal movement
Categories
Funding
- National Natural Science Foundation of China [51778575]
- Science and Technology Department of Zhejiang Province [2019C03103]
Ask authors/readers for more resources
This paper presents a two-stage analytical method for investigating the influences of new tunneling on existing tunnels, considering the asymmetric ground settlement. The proposed method is verified with field measurement data and a parametric analysis is conducted to study the influences of input parameters on tunnel responses.
New tunnelling underneath could influence existing shield tunnels in underground spaces. The evaluation of the influences of tunnelling-induced ground movements on existing tunnels has been a major concern during urban construction. This paper presents a two-stage analytical method that considers the asymmetric ground settlement for investigating the longitudinal tunnel responses to new tunnelling. An improved semi-analytical solution considering the horizontal movement of the new tunnel is established for evalu-ating the tunnelling-induced asymmetric greenfield settlement. The proposed method is verified with field measurement data from a case study. A parametric analysis is conducted to study the influences of the input parameters on the tunnel responses. Results indicate that the horizontal movement of the new tunnel due to bias loading or asymmetric construction may lead to asymmetric responses of the existing tunnel. With increasing tunnel horizontal movement, the asymmetry of the tunnel responses becomes more obvious. An increase in the pillar depth and decreases in the tunnel horizontal movement and skew angle lower the internal forces induced by new tunnelling.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available