大尖坡隧道信息化施工实践与分析

Practice and Analysis of Information Construction of Dajianpo Tunnel

在现有的技术水准和条件下,要在隧道开挖前获得高精度的地质信息较难,在隧道施工过程中应通过地质观察、预报和监控量测等手段对地质状况做出判断,对支护结构设计的合理性进行评判,即体现动态设计与信息化施工的思想。以保山~腾冲高速公路大尖坡隧道为背景,对全隧施工过程中21个段落支护及方案调整进行叙述、分析,各段均根据实际地质情况调整选用了适宜的支护参数及开挖方案。通过调整,使支护结构适应于围岩的实际状态,最终隧道顺利贯通,且避免了在不良地质条件下发生大变形、坍方等病害。该隧道信息化施工技术的应用可为今后类似隧道建设、管理提供借鉴。

At present it is difficult to gain high accuracy geologic information before tunnel excavation by available technical level and means.During tunnel construction we should identify the geologic condition and judge the rationality of support structure design by geological observing and forecasting,monitoring and measuring and other means.It is the embodiment of dynamic design and information construction for tunnel engineering.Taking Dajianpo Tunnel of Baoshan to Tengchong Expressway as the background,in the paper the supporting scheme is described and analysized regarding the 21 construction segments.The support parameters and construction methods are suitable for every segments＇ actual geological condition.Through information adjustment,the support structure is applicable to actual surrounding rock,and the tunnel is built successfully without any geological hazards such as serious deformation,collapse etc.The information construction technology of Dajianpo Tunnel can provide reference for other similar tunnels＇ construction management.