Title:
COMPREHENSIVE RESERVOIR DECONTAMINATION METHOD INCLUDING ENVIRONMENTAL MEASURES
Document Type and Number:
WIPO Patent Application WO/2019/198354
Kind Code:
A1
Abstract:
[Problem] To provide an excavation method for a contaminated soil layer, in particular during decontamination work of a soil layer in a rainwater regulating reservoir or the like in which the soil or the like has a high concentration of contamination due to rainwater effluent containing radioactive material, that does not stir the soil even when performing excavation work on soft, muddy soil using a tracked vehicle with a continuous track, and that does not cause problems that prevent the regulating reservoir or the like from performing the original function due to breaking of the reservoir bottom caused by removal of installed support pilings. [Solution] The method comprises a support piling installation step for installing support pilings, a plank placing step for placing planks, an excavation step, a plank removal step, an excavation step after plank removal, and a piling top cutting step. In the plank placing step, a transport path for a tracked vehicle is constructed by repeating: a series of steps for continuous construction by the tracked vehicle transporting subsequent planks on the placed planks; and the support piling installation step. In the excavation step, excavation is performed while removing the planks. In the piling top cutting step, a means for cutting the piling tops to match the excavation face that has undergone excavation is used.
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Inventors:
TEZUKA TAKASHI (JP)
Application Number:
PCT/JP2019/006959
Publication Date:
October 17, 2019
Filing Date:
February 25, 2019
Export Citation:
Assignee:
RYUUKI CO LTD (JP)
International Classes:
E02D3/00; E02F3/92
Foreign References:
| JP2010159579A | 2010-07-22 | |||
| JPH09184163A | 1997-07-15 | |||
| JPH06280283A | 1994-10-04 | |||
| JPH06146337A | 1994-05-27 | |||
| JP2014508090A | 2014-04-03 | |||
| JP2016114525A | 2016-06-23 | |||
| JPS60197299A | 1985-10-05 | |||
| JP2009513336A | 2009-04-02 | |||
| JP2000167533A | 2000-06-20 | |||
| JP2004298828A | 2004-10-28 |
Attorney, Agent or Firm:
KAMIYOSHIHARA,Hiroshi (JP)
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