Biological anti-seepage method for concentrated leakage at large flow rate

Abstract

The invention provides a biological anti-seepage method for concentrated leakage at a large flow rate, and belongs to the technical field of water conservancy construction. The biological anti-seepagemethod comprises the steps that a hole is drilled around a leakage passage on the upstream part of a rock-soil body leakage area to enable the drilled hole to communicate with the leakage passage; and after a flocculant aqueous solution or flocculant colloid is injected into the leakage passage through the drilled hole, a consolidation bacteria solution, a nutrient solution of consolidation bacteria and consolidation liquid are injected into the leakage passage through the drilled hole. After injection, the flocculant aqueous solution or the flocculant colloid can automatically and quickly enter an internal leakage passage of a dam body under the drive of water flow, and can produce flocculent precipitate or a porous colloidal material with a groundwater soil body to be adsorbed on the surface of soil particles, thereby blocking the leakage passage and soil pores to reduce the leakage flow rate. The flocculated precipitate and the colloidal substance can adsorb a large amount of consolidation bacteria and provide an implantation foundation for the growth of the consolidation bacteria, and can provide a condensing core for calcium deposition, thereby speeding up the realization ofanti-seepage for the centralized leakage passage.

Description

technical field [0001] The invention relates to the technical field of water conservancy construction, in particular to a biological anti-seepage method for concentrated seepage at large flow rates. Background technique [0002] Rock and soil seepage is a link that needs to be dealt with in river channels, embankments, reservoir dams and other projects, and plays a decisive role in ensuring the safety of the project. At present, the anti-seepage method in the project is mainly high-pressure injection of cement slurry. However, the underground seepage channel is very complex and concealed. It is often impossible to determine the location and depth of the pouring hole during construction, and the cement slurry particles are too large to penetrate into the small pores, resulting in the anti-seepage effect concentrated in a limited range around the pouring hole. At present, the use of microorganisms for anti-seepage is a new type of anti-seepage technology. Microorganisms can p...

AI Technical Summary

Problems solved by technology

However, due to the large internal flow velocity of some concentrated seepage channels (such as soil-concrete voids, etc.), it is difficult for microorganisms to attach and grow, making it difficult to implement microbial consolidation anti-seepage

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