Citation

Ren Q, Chen B, Meng X, Jin H, Bian L, Zheng S. China Saf. Sci. J. 2022; 32(10): 57-62.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.10.2246

PMID

unavailable

Abstract

In order to solve the safety and stability problem of slope water seepage failure caused by rainfall, taking a bridge foundation slope as an example, the Green⁃Ampt infiltration model was improved by fully considering the catchment effect of slope flow. Based on the improved model, the temporal and spatial characteristics of slope rainwater infiltration under continuous heavy rainfall were calculated, and the progressive failure process of slope with rainwater infiltration is simulated by FLAC3D software. The results show that the characteristics of the wetting front obtained by the improved model are in agree with the engineering practice. The farther away from the slope top, the greater the rainwater infiltration depth, and the slower the rainwater infiltration rate with the extension of the rainfall time. The depth of the wetting front caused by overland flow accounts for a large proportion of the total depth, andwhich is more than 50% at the front of the slope in the first 5 hours. The failure of slope develops gradually from toe to top and from shallow to deep, and has obvious characteristics of time discontinuity and multi⁃layer progressive backward progressive damage. © 2022 China Safety Science Journal. All rights reserved.

Language: zh