深埋长隧洞地质超前预报技术

THE LEADING PREDICTION TECHNOLOGY OF GEOLOGICAL DISASTERS FOR DEEP-BURIED TUNNELS

国内外已建成的各种不同用途的隧洞在掘进施工过程中常因发生不同程度的塌方、涌水、碎屑流、高地温、高地应力及岩爆、高瓦斯等地质灾害,考虑到我国近期有一系列深埋长隧洞工程,如南水北调西线工程、大伙房调水工程、锦屏二级水电站超深埋引水隧洞等急待建设工程,为避免施工过程中发生不可预见的地质灾害,故在工程施工过程中应加强地质超前预报工作,以减少投资风险,而提高预报的成功率则显得十分重要。

Geological disasters, such as landslides, water discharge, offal flows, high geo-temperature, high terrestrial stress, rock outbursts and high methane have been happened constantly during the construction processes of digging in many built tunnels with different purposes both domestic and abroad. As a series of deep-buried long tunnels were being built recently, including ： western route of South-to North Water Transfer Project, Dahuofang Water transfer project and super deep-buried long tunnel of Jinping stage two hydropower station. It is important to emphasize on the geological prediction and improve the mission success rate during the process of construction. In this way, some unpredictable geological disasters will be prevented and risk investments will be reduced.