基于iS3平台的岩体隧道信息精细化采集、分析与服务

由于岩体工程的复杂性和隐蔽性,传统的建模和分析方法难以满足较高精度的要求。针对此问题,在基础设施智慧服务系统(i S3)平台框架内,将一系列岩体隧道工程中高精度采集与分析方法及技术进行了改进和高度集成,形成一套针对岩体隧道的精细化采集、分析与服务系统,并应用于工程实践。其中,在信息采集方面,采用三维数字照相与三维激光扫描技术,对岩体表面及节理面的几何信息进行高精度的采集与重构。在此基础上,自动化地生成岩体的数字模型,然后针对不同数值方法,使用三维网格剖分或块体切割技术,将数值分析所需要的数据,集成到依据工程信息自动生成的数字模型中,实现岩体隧道的数字数值一体化。在数值分析方面,采用基于三维非线性破坏准则的有限元连续分析模块,或者集成了三维关键块体分析与非连续变形分析(DDA)的非连续分析模块,可以针对不同的工程条件及需要,进行精细化的三维连续或非连续数值分析。将以上设备及软件模块,在i S3平台上从集成为高度一体化的系统,开发工程管理、信息展示、安全分析及辅助设计等功能,以精细化、定量化分析结果为依据,实现精细化和远程化的工程辅助决策与服务,并在多个岩体隧道工程中进行了应用。

High-precision Acquisition，analysis and service of rock tunnel information based on iS3 platform

Due to the complexity and hidden nature of rock in engineering，traditional modeling and analysis in rock engineering are based on the data acquisition techniques and numerical methods with low accuracy. This paper integrates a series of high-precision methods and techniques into the iS3(infrastructure smart service system)，an integrated platform of engineering information developed by the authors. This system integrating software and hardware is used for data acquisition，analysis and service of rock tunnels. Binocular digital photography and 3D laser scanning are applied in iS3 to acquire and reconstitute surface and joint information of rock. Based on the high-precision information，3D mesh and block cutting algorithm are used to generate the information for numerical computation，which is integrated into the same 3D model with digital information from data acquisition. 3D finite element analysis module with nonlinear failure criterion and integrated computation module using the key block analysis and discontinuous deformation analysis(DDA) are implemented in iS3 to provide the high-precision numerical results. The service module of iS3 includes the functions such as the project management，information presentation，safety analysis，aided design and etc. This system realizes high-precision and remote service and has been applied in practical engineering cases.