ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2023, Vol. 43 ›› Issue (S2): 48-58.DOI: 10.3973/j.issn.2096-4498.2023.S2.005
Previous Articles Next Articles
YANG Ziyou, GAO Peng*, SHANG Yangguang, ZHANG Yu
Online:
Published:
Abstract: To comprehensively investigate the stress distribution patterns of tunnels in cold zone under the joint action of freezethaw cycle and nonhydrostatic pressure, an overall frost heave model of freezethaw cycle of tunnels in cold zone under nonhydrostatic pressure is established based on compound function considering the inhomogeneous frostheave characteristics of the frozen surrounding rocks of the tunnels in cold zone and the influence of freezethaw cycle on the mechanical properties of the surrounding rocks. Then the elastic solution of the stress of the tunnels in cold zone under the action of nonhydrostatic pressure is deduced, and a comparative validation and parametric analysis are conducted on the obtained solution. Finally, the influence of the number of freezethaw cycles, inhomogeneous frostheave coefficient, lateral pressure coefficient, freezing and expansion rate on the stress of tunnels in the cold zone is discussed. The results reveal the following: (1) The frostheave force increases by 89% and 26.7% with increasing number of freezethaw cycles and inhomogeneous frostheave coefficient, respectively. (2) The lateral pressure coefficient 〖WT〗λ 〖WT5《TNR》〗has a considerable impact on the frostheave force,the frostheave force increases and decreases with increasing azimuthal angle when 〖WT〗λ〖WT5《TNR》〗≥1 and 〖WT〗λ〖WT5《TNR》〗<1, respectively. (3) The hydrothermal migration coefficient considerably affects the frostheave force rather than other three volumetric freezing and expansion rate parameters, which can increase the frostheave force by 36.4%.
Key words: tunnels in cold zone, freezethaw cycle, uneven frost heave, lateral pressure coefficient, compound function
YANG Ziyou, GAO Peng, SHANG Yangguang, ZHANG Yu. Elastic Analysis of Tunnel Stress Field in Cold Zone Under Non-Hydrostatic Pressure Considering Freeze Thaw Cycle Effect[J]. Tunnel Construction, 2023, 43(S2): 48-58.
0 / / Recommend
Add to citation manager EndNote|Ris|BibTeX
URL: http://www.suidaojs.com/EN/10.3973/j.issn.2096-4498.2023.S2.005
http://www.suidaojs.com/EN/Y2023/V43/IS2/48
Influence of Soil Parameters on Response of Shield Tunnel Lining Considering SoilStructure Interaction
Study on Influence of Lateral Pressure Coefficient on Deformation and Stress of Shield Tunnel Joints