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    • 11. 发明专利
    • SINKING METHOD FOR CONDUIT RUN
    • JPH01153931A
    • 1989-06-16
    • JP31301587
    • 1987-12-10
    • NIPPON KOKAN KK
    • NAKAJIMA YOSHIKAZUKOTSUKI ZENJISUZUKI NOBUHISA
    • G01M99/00F16L1/024G01M13/00G01N3/00
    • PURPOSE:To facilitate burying construction and to reduce its cost by forming a settlement layer of a water-soluble material under the conduit run and feeding water for solution into the settlement layer. CONSTITUTION:A base bed 2 is formed of earth (sand) of good quality at the bottom of a digged groove 1, the settlement layer is formed thereupon by charging and packing the water-soluble material 3 such as salt and sugar in a bag 4, and the conduit run 5 is laid on its top surface; and earth (sand) 6 is deposited nearby the peak of the conduit run and earth 7 produced at the time of digging the groove 1 is deposited. A water injection pipe 10 is arranged in the bag 4 from on the ground and a water discharge pipe 11 is provided from in the bag 4 to on the ground. Then the solution water 9 in a water reservoir tank 8 is injected equally into the bag 4 through small holes of the pipe 10 and then the material 3 is dissolved and the solution water 9 containing the material 3 is discharged onto the ground through the pipe 11 naturally by capillarity. Consequently, while a cavity is formed below the conduit run 5, the laminate of the earth (sand) 6 and produced earth 7 sinks and then the conduit run 5 also sinks while displaced.
    • 14. 发明专利
    • SINKING METHOD FOR CONDUIT RUN
    • JPH01153932A
    • 1989-06-16
    • JP31339387
    • 1987-12-11
    • NIPPON KOKAN KK
    • KOTSUKI ZENJINAKAJIMA YOSHIKAZUSUZUKI NOBUHISA
    • G01N3/00F16L1/024G01M13/00G01M99/00
    • PURPOSE:To facilitate burying construction and to reduce its cost by freezing a settlement layer by using freezing liquid while saturating the layer with water, arranging the conduit run above it, and feeding heat into the settlement layer for unfreezing and sinking the conduit run. CONSTITUTION:A sheet 2 for prevention against water infiltration from the bottom part ground is laid at the bottom part of a digged groove 1, a pipe 4 is arranged on its top surface, and earth (sand) is charged to form a settlement layer 3. Then water is scattered in the settlement layer 3 to saturate the layer and then the freezing liquid such as liquid nitrogen is scattered to freeze the entire. A base bed 5 is formed thereupon, and the conduit run 6 is arranged thereupon; and earth (sand) 7 is charged up to the conduit peak and produced earth 8 is deposited up to a finish ground. The heat is fed from small holes through the pipe 4 by the feeding of hot water, etc., to unfreeze the frozen ice in the settlement layer 3 and the ground becomes weak; and the solution penetrates the sheet 2 which loses its durability at the time of freezing and is absorbed by the ground. Then the settlement layer 3 can not withstand the load of the soil laminated thereupon and the conduit run 6 and is compressed to cause a collapse phenomenon, so that the conduit run 6 sinks while displaced.
    • 17. 发明专利
    • SINKING METHOD FOR CONDUIT RUN
    • JPH01153930A
    • 1989-06-16
    • JP31301487
    • 1987-12-10
    • NIPPON KOKAN KK
    • NAKAJIMA YOSHIKAZUKOTSUKI ZENJISUZUKI NOBUHISA
    • F16L1/024G01M13/00G01M99/00G01N3/00
    • PURPOSE:To facilitate burying construction and to reduce its cost by laying a pipe for solution water which has plural small holes bored at the bottom part of a digged groove, laminating water-soluble paper to specific thickness, forming a settlement layer, and arranging the conduit run thereupon. CONSTITUTION:A base bed 2 is formed of earth (sand) of good quality on the base of the digged groove 1, the settlement layer 3 is formed of the water-soluble paper thereupon, and a sheet (made of synthetic resin) 4 for prevention against water seasoning from above is laid thereupon; and the conduit run 5 is laid on its top surface, earth (sand) 6 is deposited nearby the peak of the conduit run, and earth 7 produced at the time of digging the groove 1 is deposited. Water injection pipes 10 are arranged horizontally at the lower part in the settlement layer 3 at right angles to the conduit run 5. The the solution water 9 in a water reservoir tank 8 is injected equally into the settlement layer 3 from the small holes through the pipes 10 to dissolve the settlement layer 3 and the solution water 9 which contains the water-soluble paper penetrates the base bed and its peripheral base to form a cavity below the conduit run 5. Then the laminate of the earth (sand) 6 and produced earth 7 sinks and the conduit run 5, therefore, sinks accordingly while displaced.