浅析堆积体浅埋偏压隧道处治

Analysis on Treatment of Shallow Buried Bias Voltage Tunnel in Accumulation

云南地区地质条件复杂,有时为整体线型考虑,部分隧道难免遇到地质条件恶劣地段。当隧道进出口处于堆积体浅埋偏压地段,面临着堆积体地质松散,隧道初支易发生变形甚至坍塌的风险;同时因隧道进出口地形陡峭浅埋偏压严重,给隧道施工埋下较大安全隐患。施工中需根据堆积体地质条件及浅埋偏压程度,制定合理可行的进出洞方案,为类似地质条件下隧道施工提供宝贵经验。

The geological conditions in Yunnan are complex,sometimes considering the overall line shape,some tunnels will inevitably encounter areas with harsh geological conditions.When the entrance and exit of the tunnel are in the area of shallow buried bias of the accumulation body,it is faced with the risk of the geological looseness of the accumulation body and the risk of deformation or even collapse of the initial branch of the tunnel.big safety hazard.During the construction,it is necessary to formulate a reasonable and feasible plan for entering and exiting the tunnel according to the geological conditions of the accumulation body and the degree of partial pressure of shallow burial,so as to provide valuable experience for tunnel construction under similar geological conditions.