Sealing and water stopping device at starting portal of rectangular pipe-jacking tunnel

The invention provides a sealing and water stopping device at a starting tunnel portal of a rectangular pipe jacking tunnel, which comprises a tunnel portal frame of a ring body structure, a main body of the tunnel portal frame comprises a pipe body structure, one end of the pipe body structure is p...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	LIU ZIJIAN, CHEN RENDONG, ZHOU CHANGLIN, GE XIANXUN, BI QIANG, YANG MINGZHE, WU JINGANG, LI JIANLIN, LIU MINGGAO, LIU XIANGYU
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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