Composite stratum supporting method and supporting structure

• Main Authors: PENG JIANHAI, LI HUI, SHI XUANTAO, XU XU, GAO YUEFENG, XIAO FAN, WANG LONGFEI, YUE YINGQIN, HE XUSU, ZHANG JIANXIANG, CHAI JIAYUAN, ZHANG XIANFU
• Format: Patent
• Language: Chinese; English
• Published: 13.01.2023
• Subjects: EARTH DRILLING; FIXED CONSTRUCTIONS; GALLERIES; LARGE UNDERGROUND CHAMBERS; MINING; SHAFTS; TUNNELS

The invention relates to the technical field of tunnel supporting, and provides a composite stratum supporting method which comprises the following steps that a pipe-roofing steel pipe is constructed in a soft stratum, and one end of the pipe-roofing steel pipe is constructed to the interface of the soft stratum and a hard stratum; the adjacent pipe roofing steel pipes are interlocked together through the lock catch joints; cement mortar is poured into the pipe-roofing steel pipes and the lock catch connectors, and pipe-roofing grouting bodies are formed after the cement mortar is solidified; constructing a pipe roof steel pipe in the pipe roof grouting body in the pipe roof steel pipe; one end of the pipe shed steel pipe penetrates through the interface of the soft stratum and the hard stratum and is drilled to a preset position in the hard stratum; and cement mortar is poured into the pipe shed steel pipes, and a pipe shed grouting body is formed after the cement mortar is solidified. According to the compo