Research on the influence of waterproof layer on lining mechanical performance under early temperature load.

ABSTRACT: The installation of waterproof layer in the composite lining will change the tangential constraint conditions on the initial support side of lining, affecting the lining mechanical performance under early temperature loads. Based on a loess double track railway tunnel, the influence of tangential constraints on lining mechanical performance under concrete hydration heat temperature load was studied by numerical simulation. Interactions between surrounding rock, initial support, waterproof layer and lining were taken into consideration in the simulation model. The influences of concrete initial pouring temperature, surface heat dissipation coefficient on thermal stress of lining were analyzed and engineering suggestions for preventing early crack were proposed as well. The results show that

SUBMITTER: Sun M 

PROVIDER: S-EPMC11990643 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature