Construction method for super-large-section double-arch tunnel in soft stratum

The invention provides a construction method of a super-large-section double-arch tunnel in a soft stratum, which comprises the following steps of: excavating a middle pilot tunnel of the tunnel, constructing a middle partition wall in the middle pilot tunnel, excavating a side pilot tunnel of a rig...

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Bibliographische Detailangaben
Hauptverfasser:	ZHANG ZHAOYUAN, WANG HAILIN, XIE YEZHEN, YANG XIONG, HU CHUWEI, JIANG SHENGBO, CHEN ZHAO, WANG JING, HU JIUXIAN, WANG MUQUN, LI PIN, SUN YULONG, SHI XIAOQIONG
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	EARTH DRILLING FIXED CONSTRUCTIONS GALLERIES LARGE UNDERGROUND CHAMBERS MINING SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS SHAFTS TUNNELS
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Beschreibung
Zusammenfassung:	The invention provides a construction method of a super-large-section double-arch tunnel in a soft stratum, which comprises the following steps of: excavating a middle pilot tunnel of the tunnel, constructing a middle partition wall in the middle pilot tunnel, excavating a side pilot tunnel of a right tunnel hole, excavating an upper step of the side pilot tunnel of the right tunnel hole and constructing a support, and then excavating a lower step of the side pilot tunnel of the right tunnel hole and constructing a support. A three-step core soil reserving method is adopted to excavate a main hole of a right tunnel hole, a secondary lining of the right tunnel hole is constructed, a side pilot tunnel of a left tunnel hole is excavated, an upper step of the side pilot tunnel of the left tunnel hole is firstly excavated and supported, and then a lower step of the side pilot tunnel of the left tunnel hole is excavated and supported. And a main hole of the left hole of the tunnel is excavated by adopting a three-s