Volume 40 Issue 5
Oct.  2026
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FU Qiaosong, LIU Pan, DING Chunfu, YAO Aijun, LI Liyun. Calculation and verification of ground settlement due to precipitation in a confined aquifer[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(5): 703-710. doi: 10.20265/j.cnki.issn.1007-2993.2025-0299
Citation: FU Qiaosong, LIU Pan, DING Chunfu, YAO Aijun, LI Liyun. Calculation and verification of ground settlement due to precipitation in a confined aquifer[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2026, 40(5): 703-710. doi: 10.20265/j.cnki.issn.1007-2993.2025-0299
shu

Calculation and verification of ground settlement due to precipitation in a confined aquifer

doi: 10.20265/j.cnki.issn.1007-2993.2025-0299
  • 1.

    School of Architectural Engineering, Beijing University of Technology, Beijing 100124, China

  • 2.

    Road & Bridge International Co., Ltd., Beijing 100027, China

  • Received Date: 2025-07-09
  • Accepted Date: 2025-11-11
  • Rev Recd Date: 2025-08-24
    • Available Online: 2026-10-08
  • Publish Date: 2026-10-08
    Abstract
  • In the underground excavation construction of Tiantongyuan Station of Beijing Metro Line 13, due to the rich groundwater and the tunnel floor located in the confined aquifer, the effect of the waterproof curtain is not good and the cost is high. Therefore, the confined aquifer is pre-dewatered and decompressed before excavation to control groundwater. In order to predict the surface subsidence caused by precipitation, this study established a mathematical model of regional division based on the three-dimensional groundwater dynamics theory, which comprehensively considered the distribution curve of precipitation pressure in confined aquifer and the spatial position of aquiclude roof. After dividing the stress area of confined aquifer into non-pressure area and pressure area, the pore water pressure distribution formula of single well precipitation was constructed according to the energy conservation equation, and the Mindlin solution was introduced to calculate the surface settlement. Verified by the measured data, the average error between the final settlement value and the analytical solution is 15%. The research shows that the model can provide a theoretical basis for surface subsidence caused by precipitation in deep confined aquifer.

     

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