Feb. 9 (Sat): Soft Foundation Improvement Requires 77,000 Sand Compaction Piles, i.e. 6.5 Million Cubic Meters of Sand

(In front of the Gate)
No delivery was made, although 130 people joined the sit-in. For more than 2 months since the last year end, no delivery has been made on Saturdays. It seems that they rest on weekend, which is ordinary work hours and must be welcomed by the truck drivers and good for us, too. Construction pace is definitely slowed down.


(In front of Ryukyu Cement Pier)
No delivery of dirt and sand was made.

(On the sea)
We confirmed that dump trucks go back and forth between K9 seawall and the zone 2-1 to move dirt and sand, and that construction is under way at N5 seawall.


The soft foundation that was reported to reach to the depth of 70m in water, turned out to be 90m at the deepest point as per the additional survey conducted by the Defense Bureau. For foundation improvement, 77,000 sand compaction piles, i.e. 6.5 million m3 of sand (equivalent to 5.25 Tokyo Domes) are required. The area that requires improvement is 65 hectares which is approximately 40% of the total landfill area of 160 hectares. Vessels in Japan can handle such improvement works only to the depth of 70m. The experts say that “The number of vessels that can handle such work is limited; therefore, it is almost impossible to improve the soft foundation”.

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