Volume 39 Issue 4
Aug.  2025
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Article Navigation >  GEOTECHNICAL ENGINEERING TECHNIQUE  > 2025  >  39(4): 497-503
An Xuexu, Guo Xintian, Huang Rongbin, Tao Lei. Shape optimization of tunnel section based on the homogenization distribution of surrounding rock strain energy[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(4): 497-503. doi: 10.20265/j.cnki.issn.1007-2993.2024-0283
Citation: An Xuexu, Guo Xintian, Huang Rongbin, Tao Lei. Shape optimization of tunnel section based on the homogenization distribution of surrounding rock strain energy[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(4): 497-503. doi: 10.20265/j.cnki.issn.1007-2993.2024-0283
shu

Shape optimization of tunnel section based on the homogenization distribution of surrounding rock strain energy

doi: 10.20265/j.cnki.issn.1007-2993.2024-0283
  • 1.

    Shaanxi College of Communications Technology, Xi’an 710018, Shaanxi, China

  • 2.

    China Railway First Survey and Design Institute Group Co., Ltd., Xi’an 710043, Shaanxi, China

  • 3.

    Hanjiang-to-Weihe River Valley Water Diversion Project Construction Co., Ltd., Xi’an 710024, Shaanxi, China

  • Received Date: 2024-06-24
  • Accepted Date: 2024-10-29
  • Rev Recd Date: 2024-08-27
  • Publish Date: 2025-08-08
    Abstract
  • The selection of tunnel section shape directly affects the stability of its surrounding rock. Based on the complex variable function theory and the mixed penalty function method, a shape optimization criterion was proposed that the maximum average strain energy of the tunnel reached the minimum from the perspective of the relationship between the strain energy distribution of the tunnel and its failure characteristics. Combined with the engineering geological data of the deep hard rock tunnel from Hanjiang River to Weihe River, the effects of the radial strain energy calculation range and ground stress on the optimized tunnel section shape were investigated. The results show that: when using the shape optimization criteria developed to optimize the deep horseshoe tunnel, the radial strain energy calculation range should exceed 2.0 times the maximum tunnel radius. For tunnels with limited section width, the criterion significantly improved the uneven strain energy distribution, and the lateral pressure coefficient exhibited a stronger influence on the optimized section shape and overall distribution of surrounding rock average strain energy. When the width and height of the tunnel section are limited, this optimization criterion has limited effect on improving the uneven distribution of the surrounding rock strain energy of the tunnel, and the lateral pressure coefficient has little effect on the optimized section shape, but has a greater impact on the overall distribution of the surrounding rock average strain energy.

     

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