Title:
JACKING FORCE-TRANSMITTING MATERIAL, JACKING PIPE PROVIDED WITH SAME, AND MOLD FOR FOAM-MOLDING JACKING FORCE-TRANSMITTING MATERIAL
Document Type and Number:
WIPO Patent Application WO/2011/040187
Kind Code:
A1
Abstract:
Disclosed is a jacking force-transmitting material to be positioned between jacking pipes in the jacking method, which has improved cushion properties and, therefore, can effectively prevent breakage in the jacking pipes even in a case where a large stress, a quickly concentrated stress or a complicated stress is applied thereto. The jacking force-transmitting material, which is obtained by foaming in a mold foamable particles comprising a polystyrene-based resin, has a density of 0.17-0.67 g/cm3 and an average cell size of 60 μm or less.
Inventors:
YAMADA HIROHISA (JP)
Application Number:
PCT/JP2010/065218
Publication Date:
April 07, 2011
Filing Date:
September 06, 2010
Export Citation:
Assignee:
SEKISUI PLASTICS (JP)
YAMADA HIROHISA (JP)
YAMADA HIROHISA (JP)
International Classes:
E21D9/06; B29C44/00; F16L1/024; F16L57/00
Foreign References:
| JPS618320B2 | 1986-03-13 | |||
| JP2008274133A | 2008-11-13 |
Attorney, Agent or Firm:
HIRAKI Yusuke et al. (JP)
Yusuke Hiraki (JP)
Yusuke Hiraki (JP)
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