REACTION FORCE RECEIVING DEVICE AND STARTING METHOD

• Main Authors: MURAKAMI EMI, UKEKAWA MAKOTO, MACHITANI HIDEKI, ITO TOSHIHIRO, TENJIKU AKIRA, NAKAYAMA TAKUTO, TAKEUCHI KAZUHIKO, SHIBATA YASUSHI, FURUYA RYO, KOBAYASHI OSAMU
• Format: Patent
• Language: English; Japanese
• Published: 24.11.2022
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

To provide a reaction force receiving device and a starting method which are simple in structure, easy to construct, hardly damaged by reaction force from a small-diameter shield machine, and capable of smoothly starting the small-diameter shield machine.SOLUTION: The present invention comprises a front member 50 provided on a front end face of an existing tunnel having an existing tunnel abutting surface 500a abutting on the front end surface of the existing tunnel and an inner protruding portion that protrudes inward from the inner peripheral surface of the existing tunnel, and a rear member 51 provided inside the inner peripheral surface of the existing tunnel having a jack pressing surface 510b that receives pressing force from a shield jack of a small-diameter shield machine. The front member 50 has a rear abutting surface 501a facing rearward on the inner protruding portion. The rear member 51 has a front abutting surface 510a facing forward. The front member 50 and the rear member 51 are fixed by bringing the rear abutting surface 501a and the front abutting surface 510a into contact with each other.SELECTED DRAWING: Figure 6 【課題】構造が簡単で施工が容易であり、小径シールド掘進機からの反力によって損傷しにくく、小径シールド掘進機がスムーズに発進できる反力受け装置及び発進方法の提供。【解決手段】既設トンネルの前端面に当接する既設トンネル当接面５００ａと、既設トンネルの内周面より内側に突出する内側突出部とを有し、既設トンネルの前端面に設けられる前側部材５０、及び、小径シールド掘進機のシールドジャッキからの押圧力を受けるジャッキ押圧面５１０ｂを有し、既設トンネルの内周面より内側に設けられる後側部材５１を備え、前側部材５０は、内側突出部に後方を向く後方当接面５０１ａを有し、後側部材５１は、前方を向く前方当接面５１０ａを有し、前側部材５０と後側部材５１とは、後方当接面５０１ａと前方当接面５１０ａとを当接させて固定される。【選択図】図６