News and Events > Public Media

Soft earth delays southern end of Hai Van tunnel

Date: November 16, 2001

(SGT-DANANG) Project Management Unit 85 has been forced to postpone digging a section of the southern end of the main tunnel under Hal Van Pass after two months of grappling with soft earth.

Small cave-ins have been a frequent occurrence when attempting to dig the section since early September even though every half a meter has been reinforced with concrete. The contractor has so far been able to dig only 30 meters into the mountain for the main tunnel. .

The auxiliary tunnel on the contrary has progressed 174 meters, with some six meters excavated every day due to favorable geological conditions.

To literally get around the problem with the main tunnel, a bypass will be dug from a point 200 meters into the auxiliary tunnel to allow work to resume on the other side of the weak section, which will be finished later after consulting foreign experts.

This is the most feasible way to keep to schedule, according to the unit.

At the northerm end, the main tunnel has progressed 200 meters, the auxiliary tunnel 320 meters and the ventilation tunnel 340 meters. At the current rate of five meters every day, the digging at this end should be completed ahead of schedule.

(Source: The Saigon Times Daily)

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