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Title:
FLOATATION PREVENTIVE METHOD OF MANHOLE
Document Type and Number:
Japanese Patent JP2015124566
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a method for preventing floatation by fixing a manhole to the natural ground.SOLUTION: A floatation preventive method comprises a process of investigating soil bearing power in the depth direction of a plurality of positions capable of avoiding a pipe conduit B connected to the manhole in the natural ground C on the outer periphery of a backfill sediment layer D around the manhole A, a process of determining the anchor positions (3a and 5) including the depth of an anchor and a distance from the manhole on the basis of a result of the investigated soil bearing power of the natural ground, and thereafter forming a through-hole 2 in a sidewall of the manhole and forming a hole of reaching an anchor position by penetrating through the backfill sediment layer, a process of making the tip reach the anchor position by inserting a support member 3 into the hole from the through-hole and projecting the rear end from the sidewall of the manhole, a process of filling a grout material in the hole for inserting the support member and a process of installing the rear end of the support member on the sidewall of the manhole via an installation member 4 after hardening the grout material filled in the hole.

Inventors:
OOKA SHINKICHI
KONISHI YASUHIKO
KITAJIMA HISASHI
CHO MITSUYOSHI
Application Number:
JP2013271069A
Publication Date:
July 06, 2015
Filing Date:
December 27, 2013
Export Citation:
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Assignee:
TOA GROUT KOGYO CO LTD
International Classes:
E02D29/12; E02D31/12
Domestic Patent References:
JP2009281001A2009-12-03
JP2010150798A2010-07-08
JP2010150799A2010-07-08
Foreign References:
WO2002066753A12002-08-29
Attorney, Agent or Firm:
特許業務法人中川国際特許事務所



 
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