Tunnel portal heat preservation device

The embodiment of the utility model provides a tunnel portal heat preservation device which comprises a fixing assembly, a supporting assembly and a heat preservation assembly, and the fixing assembly extends outwards from an arch foot part of a tunnel; the supporting assembly is of an arch structur...

Ausführliche Beschreibung

Bibliographische Detailangaben

Hauptverfasser:	ZHANG ZHIGANG, YU JINBEI, GAO PENG, FEI CHUNWEI
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SHAFTS TUNNELS
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