| 摘要 |
<p>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.</p> |
