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Analysis of the formation mechanism of a landslide in the lacustrine sediment of the Diexi ancient dammed lake in the upper reaches of the Minjiang River

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A Correction to this article was published on 30 July 2022

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Abstract

The upper reaches of the Minjiang River are located at the junction of the Qinghai-Tibet Plateau and Sichuan Basin, exhibiting a complex geological environment with high mountains and deep valleys. Many ancient dammed lake sedimentary strata are exposed along the valley in this area. The Tuanjie village landslide developed in the sediments of the Diexi ancient dammed lake. In this paper, the basic characteristics of this landslide and the physical and mechanical properties of the rock and soil of this landslide are determined by combining field drilling with laboratory testing. According to the geological environment characteristics and slope deformation characteristics of landslides, the movement mechanism of landslides is simulated by the numerical simulation software PFC2D, and the genetic mechanism of landslides that developed in large thick lacustrine sediments is discussed. The results show that (1) the sliding body, slip soil and slip bed of the Tuanjie village landslide are composed of lacustrine sedimentary soil; (2) the Tuanjie village landslide has undergone multiple reactivations at the front edge. The formation and revival of landslide are closely related to the water level change of Xiaohaizi reservoir, highway construction and operation, heavy rainfall and so on. (3) Additionally, the Tuanjie village landslide has the characteristics of backward traction failure.

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Acknowledgements

The research reported in this manuscript is funded by the Natural Science Foundation of China (No. 41977226).

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Authors and Affiliations

  1. College of Environment Geology and Civil Engineering, Chengdu University of Technology, Chengdu, 610059, China

    Xiaoqun Wang, Lie Xiao, Jiakang Zhao, Jie Wei & Xin Huang

  2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, 610059, China

    Xiaoqun Wang, Lie Xiao, Jiakang Zhao, Jie Wei & Xin Huang

  3. Sichuan Highway Planning, Survey, Design and Research Institute Ltd., Chengdu, China

    Shangqi Ye

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  1. Xiaoqun Wang
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  2. Lie Xiao
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Correspondence to Lie Xiao.

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The original online version of this article was revised: Originally, Acknowledgements was missing for this article.

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Wang, X., Xiao, L., Zhao, J. et al. Analysis of the formation mechanism of a landslide in the lacustrine sediment of the Diexi ancient dammed lake in the upper reaches of the Minjiang River. Bull Eng Geol Environ 81, 328 (2022). https://doi.org/10.1007/s10064-022-02829-2

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