Field experiment on deep response of slope subjected to different rainfalls in Plateau mountainous area of Northwest Yunnan

Authors

CHEN He, Yunnan Institute of Transportation Planning and Design, Kunming, Yunnan 650041, China; 2. Yunnan Communications Investment & Construction Group Co., Ltd., Kunming, Yunnan 650103, China; 3. Yunnan Key Laboratory of Digital Transportation, Kunming, Yunnan 650000, ChinaFollow
LU Zhiqiang, Yunnan Institute of Transportation Planning and Design, Kunming, Yunnan 650041, China; 2. Yunnan Communications Investment & Construction Group Co., Ltd., Kunming, Yunnan 650103, China; 3. Yunnan Key Laboratory of Digital Transportation, Kunming, Yunnan 650000, China
LI Guo, Yunnan Institute of Transportation Planning and Design, Kunming, Yunnan 650041, China; 2. Yunnan Communications Investment & Construction Group Co., Ltd., Kunming, Yunnan 650103, China; 3. Yunnan Key Laboratory of Digital Transportation, Kunming, Yunnan 650000, China
CHEN Zhengyu, Yunnan Institute of Transportation Planning and Design, Kunming, Yunnan 650041, China; 2. Yunnan Communications Investment & Construction Group Co., Ltd., Kunming, Yunnan 650103, China; 3. Yunnan Key Laboratory of Digital Transportation, Kunming, Yunnan 650000, China

Abstract

In order to investigate the characteristics and mechanism of deep response of slopes subjected to different rainfalls in plateau mountainous area of Northwest Yunnan, remote real-time monitoring devices were deployed to carry out slope prototype field tests, analyze the effects of natural rainfalls in different forms and intensities on deep displacement and groundwater level changes, and put forward suggestions for landslide monitoring and early warning. The results show that the characteristics of heavy rainfall, steep slope, and rock fragmentation during flood season can induce the frequent fluctuation of groundwater level in the deeper part of the slope, which results in the formation of two layers of deformation shear zone in the deep part of the slope. The shallow displacement increases with the increase in cumulative rainfall, and the cumulative rainfall required by continuous rainfall to induce shallow displacement is smaller than that by intermittent rainfall. The long-term continuous fluctuation of groundwater level is the main reason for the intermittent sharp increase in deep displacement. Monitoring indexes should be selected from the perspective of early warning, and more attention should be paid to the sequence of rainfall, groundwater level, and displacement used for landslide early warning.

Publication Date

3-17-2023

DOI

10.14048/j.issn.1671-2579.2023.01.002

First Page

11

Last Page

18

Submission Date

March 2025

Recommended Citation

He, CHEN; Zhiqiang, LU; Guo, LI; and Zhengyu, CHEN (2023) "Field experiment on deep response of slope subjected to different rainfalls in Plateau mountainous area of Northwest Yunnan," Journal of China & Foreign Highway: Vol. 43: Iss. 1, Article 46.
DOI: 10.14048/j.issn.1671-2579.2023.01.002
Available at: https://zwgl1980.csust.edu.cn/journal/vol43/iss1/46