城市盾构隧道技术状况评定方法研究

Study on Technical Condition Assessment Method of Urban Shield Tunnel

针对目前大量城市盾构隧道逐渐进入高维修阶段,而我国目前在隧道技术状况评定方面的技术体系和相应的指导规范又存在严重脱节的背景,结合盾构隧道的实际病害情况,对隧道养护现状和主要问题、隧道结构技术状况评定等方面作了系统研究,提出了隧道评定单元的划分原则、子构件评分指标、构件单元评分方法以及隧道结构整体评价方法。该方法结合现场实际检测数据,在实际隧道检测和技术状况评定中得到了应用,可以为城市盾构隧道结构性能评定和后续的养护措施决策提供有益的技术支持。

Aiming at a lot of urban shield tunnels gradually entering the stage of high maintenance,there is a serious disconnection between the technical system and the relevant guidance standard in the aspect of technical condition assessment of tunnel at present in China.Combined with the actual disease condition of shield tunnel,the present situation and main problems of tunnel maintenance,and the technical condition assessment of tunnel structure are systematically studied.The division principle of tunnel assessment unit,the scoring index of subcomponent,the scoring method of component unit and the overall assessment method of tunnel structure are proposed.Combined with the actual test data on site,these methods are applied in the actual tunnel detection and technical condition assessment.The beneficial technical support can be provided for the performance assessment of urban shield tunnel structure and the decision of the subsequent maintenance measures.