Simultaneous Construction Method using a Honeycomb Segment
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This is a shield tunnel rapid construction method, which carries out advancing and segment assembly simultaneously using a hexagonal Honeycomb Segment. Because the inner surface of the segment is smooth, a tunnel can be constructed without a secondary tunnel lining, allowing for a reduction in construction costs and shortening of construction schedule by the reduction of the digging diameter. The simultaneous operation makes shield tunneling in long distance much faster.
Highest Award of 3rd Infrastructure Technology Development Award (awarded by the Minister of Land, Infrastructure and Transport) |
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Inclined Shaft TBM Method
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| This is a rock tunneling method to build a steeply inclined shaft with the TBM. There are three ways available in this method ; (1) pilot TBM + reaming by blast, (2) pilot TBM + reaming TBM and (3) full face TBM. Compared to the traditional inclined shaft construction method, a long distant shaft can be constructed safely and speedily, and we have the best track record in this field in Japan. |
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Okumura's Dam Concrete Placer Automation System
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| The mixing, conveyance and placing of concrete are automatically done by the conductor’s mobile computer control. It allows for efficiency of work and manpower saving. Safety and quality are improved. This system has the certification of technical review of the Japan Dam Engineering Center. |
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R&C Method
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| This is a no-dig construction method for underpass constructions. After taking on the orbital or road load with a rectangular steel tube attached with a friction-cut plate, it shoves the precast box culvert and replaces the steel tube with the box. It allows for a construction of a quality underpass with small earth covering. We have taken on over 250 experiences up till now. |
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