平田隧道穿越F2断层涌水塌方处治方案研究

Remediation of Collapse Induced by Groundwater Gushing in Pingtian Tunnel Excavation Crossing an F2 Fault Zone

针对广西大浦高速公路平田隧道穿越F2断层破碎带发生的涌水塌方事故,深入调查了事故发生的过程,并对涌水塌方机制进行了分析。在此基础上,提出了涌水塌方综合处治方案,通过方案的有效实施,掌子面涌水量及支护结构的变形量均得到有效控制。研究成果可供类似的隧道工程借鉴与参考。

The remediation of the highway tunnel excavation collapse induced by the groundwater gushing in the Pingtian Tunnel crossing an F2 faulted fracture zone in the Dapu Expressway project is introduced in this paper.Factors that caused the accident were evaluated and investigated in depth.The remediation plan was proposed based on the thorough investigations and was effectively implemented in the construction.Both the inflow of the groundwater into the excavated area and the deformations of the supporting structures were under the control.