|Table of Contents|

Deformation Law and Stability Prediction of Dongjiatun Landslides Under Rainfall During Various Recurrence Periods in Yan'an Area of Shaanxi, China(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2025年第03期
Page:
331-343
Research Field:
黄河流域生态保护和高质量发展专刊(上)
Publishing date:

Info

Title:
Deformation Law and Stability Prediction of Dongjiatun Landslides Under Rainfall During Various Recurrence Periods in Yan'an Area of Shaanxi, China
Author(s):
SUN Lin-xuan1;  DENG Long-sheng1; 2*;  TANG Dong1;  CHEN Jia-le1;  SHEN Shu-han1;  QI Dong-hong1;  ZHANG Wen-jie1;  WANG Tong1
(1.School of Geological Engineering and Geomatics,Chang'an University,Xi'an 710054,Shaanxi,China; 2.Key Laboratory of Geological Hazards Mechanism and Risk Control of Shaanxi Higher Education Institutes,Chang'an University,Xi'an 710054,Shaanxi,China)
Keywords:
loess landslide;  numerical simulation;  rainfall infiltration;  deformation law;  stability;  damage pattern;  Shaanxi
PACS:
P642.22
DOI:
10.19814/j.jese.2025.03020
Abstract:
In recent years, extreme rainfall events have become increasingly frequent in Loess Plateau, leading to a growing trend in the quantity of induced geological disasters, seriously threatening economic construction and social development. Dongjiatun landslide in Yan'an area of Shaanxi was taken as the research subject; through field investigations, on-site drilling, laboratory tests, and numerical simulations, the seepage field, deformation, stability and damage pattern of the landslide under rainfall during various recurrence periods were investigated. The results show that ① the predicted precipitations corresponding to the exceedance probabilities of 10.00%, 5.00%, 2.00%, 1.00%, 0.10% and 0.01% during various recurrence periods of rainfall in Dongjiatun landslide are 92.15, 103.82, 118.10, 128.40, 157.78, and 186.51 mm·d-1, respectively; ② the saturation range and pore water pressure in Dongjiatun landslide increase marginally with rainfall intensity; significant water retention effects occur at the top of paleosol layers and joint fissure tips, forming critical interfaces for slope deformation and sliding; slope stability declines with the incease of rainfall intensity and duration; the slope enters a unstable state when subjects to 24 h rainfall with an exceedance probability of 1.00%; ③ the seepage field is jointly influenced by surface runoff, uniform infiltration, and preferential flow through joints; shallow erosion-sliding may result from combined surface runoff and uniform infiltration, while deep shear sliding could occur due to joint-controlled preferential flow and paleosol water retention effects.

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Last Update: 2025-06-20