Cross Passage Construction: Keeping it Safe Part 3

The construction of cross passages between twin-tube, TBMs tunnels in soft ground is a challenge to the industry and represents significant risks. Ground Freezing is a safe method to construct these cross passages and has been used in difficult ground conditions and high water pressures in Europe. Recent advances in the technology and the planning and approaches successfully used in Europe should be considered for similar projects in the USA and elsewhere. In addition the use of temporary bulkheads and the sequence of cross passage construction are important safety measures for transportation tunnels.

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Great Method!