Title:
パッカー及び当該パッカーを用いる工法
Document Type and Number:
Japanese Patent JP7046448
Kind Code:
B2
Abstract:
To provide a packer capable of easily and accurately detecting whether an injection material leaks to an upper part of a packer, and a method of using such a packer in a method of injecting the injection material in order from an upper region to a lower region (so-called "stage grout method").SOLUTION: In a packer (1) of the present invention, an injection material detector (2) is mounted on the ground side, the injection material detector (2) comprises a housing (2A), the housing (2A) is connected to (for example, two) optical signal transmission systems (2B1, 2B2: for example, glass fiber), an injection material entry opening (2AA) is formed in the housing (2A), and an area inside the housing of the injection material entry opening 2AA is located between the ends of the (for example, two) transmission systems (2B1, 2B2).SELECTED DRAWING: Figure 1
Inventors:
Masayoshi Otaki
Naoto Tomoe
Hideki Abe
Masakazu Nakajima
Naoto Tomoe
Hideki Abe
Masakazu Nakajima
Application Number:
JP2018161049A
Publication Date:
April 04, 2022
Filing Date:
August 30, 2018
Export Citation:
Assignee:
Nittoku Construction Co., Ltd.
International Classes:
E02D3/12
Domestic Patent References:
| JP8145836A | ||||
| JP55032849A | ||||
| JP7062643A | ||||
| JP3167168U | ||||
| JP2017155506A |
Foreign References:
| KR101831683B1 | ||||
| US5980446 |
Attorney, Agent or Firm:
Takahashi Patent Office