Highway tunnel karst cave plate span supporting system and construction method

• Main Authors: WEI YU, DENG BIN, CHEN XINBIAO, LIU KUNQIANG, LI HONGTING, CHEN JIQUAN, CAI MINGLIN, MENG GUOWANG, LONG WENLIANG, SONG YUAN, ZHAO RENJIN, LIU JIALE, LIANG LUJIA, TAN JIERAN, HUANG ZHIMING, LONG YOUHUA, MO WEI, ZENG XIAOLIN, YANG WENSHUAI, SONG LIQUAN, DING CHONGHANG, LIANG CHANGYU
• Format: Patent
• Language: Chinese; English
• Published: 14.11.2023
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The invention relates to the technical field of highway tunnel construction, and discloses a highway tunnel karst cave plate span supporting system and a construction method.The construction method comprises the steps that S1, a normal section of a tunnel is constructed, and a reinforced lining section is arranged at the end of a tunnel karst cave section for transition; s2, expanding excavation is conducted on the tunnel karst cave which is not completely exposed according to the tunnel section measurement result; s3, building a construction platform at the karst cave section of the tunnel; s4, plate span structure cushion platform construction is conducted at the two ends of the tunnel karst cave section; s5, plate span structure construction is conducted so that the plate span structure can be supported on the plate span structure cushion table; s6, after the slab span structure of the karst cave section is constructed, primary support is conducted on the slab span section, and active support is formed; an