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Title:
CONSTRUCTION METHOD OF UNDERGROUND TRENCH, AND EXCAVATION SPACER
Document Type and Number:
Japanese Patent JP2017089346
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a construction method of an underground trench and an excavation spacer that reduce an excavated soil amount, reduce risks of fall-off and others, and reduce deformation risks of surrounding ground at a time of trench excavation, by minimizing a trench width.SOLUTION: An excavation spacer 1 includes a pair of plate-form materials 3, an injection pipe 5 provided between the pair of plate-form materials 3, and a support 7 provided between the pair of plate-form materials 3 for maintaining an interval between the plate-form materials 3. The excavation spacer is embedded and installed in a ground while fluidizing sediment of the ground by injecting high-pressure water jet from the injection pipe 5. The excavation spacer 1 installed later is connected with the excavation spacer 1 installed previously using a guide joint. After embedding and installing the excavation spacer 1 in the ground, sediment at a portion between the pair of plate-form materials 3 is removed using the injection pipe 5 for forming a trench part, and muddy water that is a fluid filler is filled in the trench part.SELECTED DRAWING: Figure 1

Inventors:
OKAMOTO MICHITAKA
SUEYOSHI TAKANOBU
ONO SUNAO
ARIMA TAKESHI
NISHIO AKIRA
NAGATOMI MASASHI
OBARA TAKASHI
SATO KAZUNARI
Application Number:
JP2015224710A
Publication Date:
May 25, 2017
Filing Date:
November 17, 2015
Export Citation:
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Assignee:
KAJIMA CORP
International Classes:
E02D31/08
Attorney, Agent or Firm:
Seiichi Inoue