| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To facilitate build of a pipe member into a target depth without using a large-scale auxiliary member such as a balance weight when the pipe member whose specific gravity is smaller than liquid is lowered and built along its pipe axis direction, into a borehole filled with liquid. <P>SOLUTION: The method is related to lowering and build of the pipe member of an underground heat exchanger, whose specific gravity is smaller than the liquid, along the pipe axis direction of the pipe member, into the borehole filled with the liquid. By extracting the liquid in the borehole by a predetermined quantity during build of the pipe member, the level of the liquid is lowered. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
