Research on the Safety Thickness of Pre-grouting Curtain for Vertical Shaft Ground and Its Application in Tunnel Ventilation Shaft：Take the No. 4#br#
Ventilation Shaft of Tianshan Shengli Tunnel as an Example#br#
MAO Jinbo1，ZHAO Honggang1，HAN Qiang2，JI Zhongkui2，ZHANG Binbin1，LI Yalong
（1.CCCC Second Highway Engineering Co., Ltd.Dongmeng Engineering Co., Ltd., Xi’an 710119, Shaanxi China; 2.
Xi’an Research Institute Co., Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, Shaanxi
China)
MAO Jinbo, ZHAO Honggang, HAN Qiang, JI Zhongkui, ZHANG Binbin, LI Yalong. Research on the Safety Thickness of Pre-grouting Curtain for Vertical Shaft Ground and Its Application in Tunnel Ventilation Shaft：Take the No. 4#br#
Ventilation Shaft of Tianshan Shengli Tunnel as an Example#br#[J]. Tunnel Construction.
