Li Xinyu, Zhang Dinghua, Zhang Yi, Xu Jiaming, Xia Honggang, Tang Zheng
China Yangtze Power Co., Ltd., Yichang 443000, China.
CRRC SMD (Shanghai) Ltd., Shanghai 200240, China.
ACS Omega. 2024 Jul 5;9(28):30151-30158. doi: 10.1021/acsomega.3c09662. eCollection 2024 Jul 16.
The grouting repair process of the sealing baffle on the surface of dam cracks can improve the repair slurry diffusion distance in the cracks; however, the process must be optimized. To address the problem of crack repair technology of underwater dam concrete with one section open and the other closed, a grouting analysis model was established. By adjusting various parameters in the grouting process, the influences of the grouting pressure, position of the grouting hole, diameter of the grouting hole, and water pressure on the diffusion of the Bingham fluid repair slurry in these cracks were studied. The results show that the grouting pressure and diameter of the grouting hole significantly influence the limited diffusion distance of Bingham fluid cement slurry in cracks. With an increase in grouting pressure and grouting hole diameter, the limiting distance of the front surface increases. The influences of the water pressure and position of the grouting hole are small. In addition, through correlation analysis, the degrees of influence of different factors can be sorted, providing the priority factors for actual operation construction.
大坝裂缝表面密封挡板的灌浆修复工艺可提高修复浆液在裂缝中的扩散距离；然而，该工艺必须进行优化。为解决水下大坝混凝土一段开口、一段封闭的裂缝修复技术问题，建立了灌浆分析模型。通过调整灌浆过程中的各种参数，研究了灌浆压力、灌浆孔位置、灌浆孔直径和水压对宾汉流体修复浆液在这些裂缝中扩散的影响。结果表明，灌浆压力和灌浆孔直径对宾汉流体水泥浆液在裂缝中的有限扩散距离有显著影响。随着灌浆压力和灌浆孔直径的增加，前沿面的极限距离增大。水压和灌浆孔位置的影响较小。此外，通过相关性分析，可以对不同因素的影响程度进行排序，为实际作业施工提供优先考虑因素。
