| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a protecting construction method whereby back filling can be efficiently performed without generating unreasonable stress in a buried object, in back filling of the line-shaped buried object exposed in an underground space. SOLUTION: A gas pipe 10 exposed in an underground construction space, utilizing a lining structure or the like 11, is suspension supported by using a suspension support 12, after completion of underground construction, the pipe is left as in a suspension support condition, the fluidization processing soil is injected in a lower part of the gas pipe 10, to be solidified by natural infiltration drain water, a batholis 13 is formed. Next on this batholis 13, along the gas pipe 10, in both sides thereof, a sheathing board is vertically provided, inside this sheathing board, to a degree of an upper half exposed of the gas pipe 10, the fluidization processing soil is injected, to be solidified by natural de-watering. After the fluidization processing soil is solidified, the suspension support 12 is removed, for preventing floating of the gas pipe 10, a float preventing jig is used, back filling is performed. After completion of back filling, the float preventing jig is removed, a hole of trace after this removal is back filled.</p> |
