Micro-disturbance mechanical separate tunneling construction method for tunnel in weak surrounding rock

The invention discloses a micro-disturbance mechanical separate tunneling construction method for a tunnel in weak surrounding rock. The method comprises the following steps: firstly, a shield is divided into multiple sub-shields from top to bottom, the multiple sub-shields are jacked gradually from...

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Main Authors LAI HONGPENG, ZHANG LONG, LAI JINXING, XU SHUOSHUO, WANG XIULING, QIU JUNLING, XIE YONGLI, QIN YIWEN, WEI RUI, MA ENLIN
Format Patent
LanguageChinese
English
Published 09.04.2019
Subjects
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Summary:The invention discloses a micro-disturbance mechanical separate tunneling construction method for a tunnel in weak surrounding rock. The method comprises the following steps: firstly, a shield is divided into multiple sub-shields from top to bottom, the multiple sub-shields are jacked gradually from bottom to top, and disturbance to the surrounding rock is reduced; then step separate excavation isperformed on a tunnel face, excavation disturbance is reduced as compared with overall excavation, surrounding rock deformation is controlled, tunnel deformation is prevented, and construction safetyis improved; secondly, the excavated tunnel is subjected to primary support with prefabricated members, and rapid sealing and primary support reinforcement are realized; finally, secondary lining isperformed on the primary support, and waterproof plates are arranged between the secondary lining and the primary support. The construction method is safe, efficient and economical, effectively controls large disturbance and la
Bibliography:Application Number: CN2019196160