关键词: 堤坝渗漏, 水下渗漏封堵, 相变材料, 熔化过程, 加热设备

Abstract: Leakage is not only the high incidence disease of dam or dike, but also the pre-warning signal for dam and dike collapse in flood season, and the rapid plugging for leakage passage is of great significance to the emergency rescue of the dam or dike. There are many methods to deal with the leakage disease at present, but there are still a variety of defects in rapid leak-stopping in flood season, especially for the emergency plugging of the underwater leakage passage of the dam. In order to solve the above problems, a new method by melting phase change material was provided, and the corresponding underwater heating equipment was developed and the phase change plugging material was tested. Through many indoor underwater plugging tests, the melting law of phase change plugging material after underwater heating was obtained, and the diffusion law of phase change plugging material after underwater melting and the plugging mechanism of leakage passage were summarized. The feasibility of this method for emergency plugging underwater concrete interface leakage of dike was verified. On this basis, the field test of leakage passage plugging on concrete slabs was carried out. The results showed that this method can plug the leakage passage of underwater concrete interface efficiently, which can provide reference for similar projects.

Key words: leakage of dam or dike, underwater leakage plugging, phase-change material, melting process, heating equipment