引大入秦工程盘道岭隧洞加固维修方案优选

Optimization of Pandaoling Tunnel Reinforcement Maintenance Scheme of Yindaruqin Project

调查引大入秦工程隧洞病害的基本情况,分析常见病害的基本特征,对37#盘道岭隧洞提出了底板置换、系统灌浆、钢丝网防裂、顶拱排水等一般病害的处理措施。对病害严重的隧洞提出了3种备选加固维修方案,并分别对3种方案的设计情况进行分析,从技术上论证各方案的优缺点并进行方案的经济评价。最终综合考虑了隧洞过流断面面积、灌溉供水、施工难度、工程进度和节约投资等因素选择了最优方案。

The paper describes the basic situation of tunnel faults of Yindaruqin Project,analyzes the basic characteristics of common faults,and puts forward the general fault treatment measures of floor replacement,system grouting,steel mesh crack control,crown drainage and so on.The paper puts forward three alternative crown drainage reinforcement maintenance schemes,and analyzes the design cases of these three schemes,and technically demonstrates the advantages and disadvantages of these schemes and economically evaluates the schemes,and finally comprehensively considers the factors of flow section area,irrigation water supply,construction difficulties,engineering schedule and economical investment of tunnel for the selection of the most optimized scheme.