Volume 14 Issue 2
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Article Navigation >  Water Science and Engineering  > 2021  >  14(2): 149-158
Ming-jie He, Hao Li, Jian-rong Xu, Huan-ling Wang, Wei-ya Xu, Shi-zhuang Chen. 2021: Estimation of unloading relaxation depth of Baihetan Arch Dam foundation using long-short term memory network. Water Science and Engineering, 14(2): 149-158. doi: 10.1016/j.wse.2021.06.003
Citation: Ming-jie He, Hao Li, Jian-rong Xu, Huan-ling Wang, Wei-ya Xu, Shi-zhuang Chen. 2021: Estimation of unloading relaxation depth of Baihetan Arch Dam foundation using long-short term memory network. Water Science and Engineering, 14(2): 149-158. doi: 10.1016/j.wse.2021.06.003
shu

Estimation of unloading relaxation depth of Baihetan Arch Dam foundation using long-short term memory network

doi: 10.1016/j.wse.2021.06.003
  • a.

    Powerchina Huadong Engineering Corporation Limited, Hangzhou 311122, China

  • b.

    Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China

  • c.

    Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China

Funds:

the National Key Research and Development Program of China 2018YFC0407004

the Natural Science Foundation of China 51939004

the Natural Science Foundation of China 11772116

More Information
  • Corresponding author: E-mail address: wyxu@hhu.edu.cn (Wei-ya Xu)
  • Received Date: 2020-09-22
  • Accepted Date: 2021-03-22
    • Available Online: 2021-06-11
    Abstract
  • The unloading relaxation caused by excavation for construction of high arch dams is an important factor influencing the foundation's integrity and strength. To evaluate the degree of unloading relaxation, the long-short term memory (LSTM) network was used to estimate the depth of unloading relaxation zones on the left bank foundation of the Baihetan Arch Dam. Principal component analysis indicates that rock characteristics, the structural plane, the protection layer, lithology, and time are the main factors. The LSTM network results demonstrate the unloading relaxation characteristics of the left bank, and the relationships with the factors were also analyzed. The structural plane has the most significant influence on the distribution of unloading relaxation zones. Compared with massive basalt, the columnar jointed basalt experiences a more significant unloading relaxation phenomenon with a clear time effect, with the average unloading relaxation period being 50 d. The protection layer can effectively reduce the unloading relaxation depth by approximately 20%.

     

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