ABSTRACT
In Northern Thailand, the Mae Tang-Mae Ngad-Mae Kuang Tunnel project is crucial for enhancing regional water distribution. Utilizing a combination of Drilling and Blasting and Tunnel Boring Machine techniques, the project initially faced severe water ingress at station 3+016, with rates exceeding 200 liters per second, within complex geological formations of granite and altered marble. In response, the Grout Port device was introduced, enabling effective management of high water flow and facilitating stabilization of the ingress zone using advanced grouting techniques. This innovative methodology not only addressed the immediate problem within 22 days but was also extended to preempt potential issues at stations 2+630, 2+609, and 2+600, enhancing the project’s resilience against geological unpredictability.
