ABSTRACT
Multihole grouting technology represents a significant evolution in the field of grouting, and it has been a topic of discussion for industry professionals seeking to optimize their processes. Practitioners have polarized opinions, dividing practitioners between those who adhere to traditional methods and those willing to explore new ideas and possibilities. The primary advantage of Multihole grouting lies in its potential to enhance operational efficiency. With a standard pump capacity of one hundred litres per minute, current single-hole practices utilize approximately 10% of the available capacity. In contrast, Multihole grouting enables the simultaneous grouting operation of up to ten holes with the same energy input, resulting in a significant increase in efficiency. Multihole grouting do not only expedites project timelines, but also contributes to environmental sustainability through significant energy savings. However, the implementation of Multihole grouting is not without its challenges. There are concerns regarding the adequacy of existing machinery, the physical demands on personnel, and the feasibility of adapting this technique to diverse project specifications. Sweco’s engagement with Multihole grouting over the last two years has produced insightful outcomes. Two projects incorporating this method were completed, one of which demonstrated efficiency gains exceeding 60% of the available capacity. The other project yielded results comparable to single-hole grouting, yet the contractor favoured the Multihole approach for its operational simplicity. In conclusion, while Multihole grouting offers a compelling case for increased efficiency, resulting in both economic and environmental benefits. People within the industry who have firsthand experience with Multihole grouting are becoming advocates for its broader adoption, recognizing its potential to advance the grouting field.
