METHOD OF EXCAVATING TUNNEL AND SUPPORT MEMBER FOR TUNNEL

Japanese Patent JP3014038

B2

PROBLEM TO BE SOLVED: To increase workability, by excavating ground, erecting support members, and widening the support members in cooperation with a first gripper and a jack.
SOLUTION: When excavating ground, a gripper 3 is widened to contact the inner wall of a tunnel liner L to support an excavating machine 1. Then a jack 4 is stretched to thrust the excavation machine 1 while rotating the cutter head of the excavating part 2 and excavating ground. The reactive force is transmitted to the liner L in the position B through the gripper 3. After thrusting by one stroke, the liner L is erected in a new position A. The expansion part of the liner L in the position B is replaced by a steel member or the like. And the excavating part 2 is temporarily fixed by a front jack and the gripper 3 is pulled to the excavating part 2 side by the jack 4. And further, the gripper 3 is widened to support the excavating machine 1 and the liner L at the position A is widened. In this way, since a large reactive pressure can be obtained at a low plane pressure, it can be applied for a soft rock part and the construction period can be reduced and further, damage of the liner can be prevented.

Yoshimura Muneo
Uji Shigeru
Aoyama Kaname
Hiroaki Suzuki
Makoto Okimoto
Noriyuki Hirosawa

JP31605996A

February 28, 2000

November 27, 1996

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Kashima Construction Co., Ltd.
Sumitomo Osaka Cement Co., Ltd.
Nippon Steel Corporation

E21D9/10; E21D11/04; E21D11/14; (IPC1-7): E21D11/14

JP51125928A
JP4724811B1

Toshitada Takahashi (1 outside)

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