SPRING WATER PRESSURE MEASURING DEVICE NEAR TO CUTTING FACE IN TUNNEL

Title:

SPRING WATER PRESSURE MEASURING DEVICE NEAR TO CUTTING FACE IN TUNNEL

Document Type and Number:

Japanese Patent JP2006322140

Kind Code:

A

Abstract:

To provide a spring water pressure measuring device near to a cutting face in a tunnel capable of easily measuring hydraulic pressure of ground water locally distributed around a cutting face of a tunnel.

The spring water pressure measuring device near to the cutting face of the tunnel is equipped with a self drilling rock bolt 2 as a self drilling type hollow pipe having a bit 1, a branch hollow pipe 4 connected to the self drilling rock bolt 2, a first valve 5 connected to the branch hollow pipe 4, a second valve 7 connected to the branch hollow pipe 4 and a hydraulic pressure gauge 12 connectable to the second valve 7.

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Inventors:

KITANI HIDEO
OTA TAKEHIRO
HASEGAWA ATSUSHI
ISOTANI ATSUMI
GOTO MITSUMICHI

Application Number:

JP2005143460A

Publication Date:

November 30, 2006

Filing Date:

May 17, 2005

Export Citation:

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Assignee:

RAILWAY TECHNICAL RES INST
JRTT JAPAN

International Classes:

E21D9/00; E21B47/06

Attorney, Agent or Firm:

Mamoru Shimizu
Makoto Kawai

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