TBM duct piece exterior drainage structure and construction method thereof

• Main Authors: WANG XIAOGANG, LI NA, LIU LIPENG, WANG YUJIE, FU RUIZHI, WANG MINGYOU, LIU FENG, LI CHANGBO, YANG ZUOBIN, ZHAO YUFEI, LI CHAOYI, QIN PENGXIANG, SUN XINGSONG
• Format: Patent
• Language: Chinese; English
• Published: 07.08.2018
• Subjects: 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

The invention discloses a TBM duct piece exterior drainage structure which mainly comprises duct pieces, filling auxiliary materials and bolts. duct piece drainage grooves are formed in the outer surfaces of the duct pieces. The duct piece drainage grooves in the edges of the duct pieces can enable adjacent duct pieces on the same ring and the duct pieces on the adjacent ring to be communicated toform a continuous passage. The filling auxiliary materials are arranged in the duct piece drainage grooves. The filling auxiliary materials comprise impermeable materials, coarse grain size materialsand porous square ducts. Any one of the impermeable materials, the coarse grain size materials and the porous square ducts is arranged in the duct piece drainage grooves according to the conditions of surrounding rocks. The filling auxiliary materials in the duct piece drainage grooves in the edges of the adjacent duct pieces can be contacted and communicated mutually. Drainage pitches are arranged in the surfaces of the