Volume 39 Issue 6
Dec.  2025
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Article Navigation >  GEOTECHNICAL ENGINEERING TECHNIQUE  > 2025  >  39(6): 939-945
Wei Xiaowang, Wang Zhongquan, Wang Xinzheng, Chen Yonghui. Model tests and numerical simulations of grouting diffusion law in hole for slope protection of the Qiantang River[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(6): 939-945. doi: 10.20265/j.cnki.issn.1007-2993.2024-0529
Citation: Wei Xiaowang, Wang Zhongquan, Wang Xinzheng, Chen Yonghui. Model tests and numerical simulations of grouting diffusion law in hole for slope protection of the Qiantang River[J]. GEOTECHNICAL ENGINEERING TECHNIQUE, 2025, 39(6): 939-945. doi: 10.20265/j.cnki.issn.1007-2993.2024-0529
shu

Model tests and numerical simulations of grouting diffusion law in hole for slope protection of the Qiantang River

doi: 10.20265/j.cnki.issn.1007-2993.2024-0529
  • 1.

    Zhejiang Qiantang River Administration Survey and Design Institute, Hangzhou 310016, Zhejiang, China

  • 2.

    Key Laboratory of Geomechanics and Embankment Engineering of Ministry of Education, Hohai University, Nanjing 210024, Jiangsu, China

  • Received Date: 2024-11-17
  • Accepted Date: 2025-03-06
  • Rev Recd Date: 2024-12-23
    • Available Online: 2025-12-08
  • Publish Date: 2025-12-08
    Abstract
  • Based on the Haitang Anlan project on the north bank of the Qiantang River, a replacement scheme of masonry was proposed to use high-strength cement mortar drilling and grouting to strengthen the structural blocks of the protective surface of the waterfront slope. Model tests and numerical simulations on the flow and diffusion law of cement mortar in the gravel layer under masonry slope protection were carried out. The influence of grouting pressure and grouting amount on the flow diffusion form of the slurry and the overall filling effect of cement mortar with different fluidity degrees was discussed. The results show that the overall diffusion direction and dominant diffusion channel of cement mortar with different fluidity degrees are the same, which are horizontal to symmetrical diffusion from the grouting port, and the grout preferentially flows to the lower end of the masonry slope protection, and then upward, but the diffusion and failure mode of the grout in the gravel layer will change due to different fluidity. Cement mortar with different fluidity also corresponds to the failure value of different grouting pressures and grouting amounts. In this model test condition, when the initial fluidity of the slurry is about 400 mm, the ultimate grouting pressure is 3 MPa, and the mass of the ultimate injected slurry is about 51 kg. When the grouting pressure is constant at 2 MPa, the effective volume filling rate of the weak area of the slurry flow can reach 83%, which is close to the filling effect of 85% of the pump grouting and meets the requirements of the specification.

     

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